gad

package module
v0.0.0-...-aea1278 Latest Latest
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 Go to latest Published: Mar 28, 2024 License: MIT Imports: 32 Imported by: 0

README

The Gad Language

Go Reference Go Report Card Gad Test Gad Dev Test Maintainability

Gad is a fast, dynamic scripting language to embed in Go applications. Gad is compiled and executed as bytecode on stack-based VM that's written in native Go.

Gad is actively used in production to evaluate Sigma Rules' conditions, and to perform compromise assessment dynamically.

To see how fast Gad is, please have a look at fibonacci benchmarks (not updated frequently).

Play with Gad via Playground built for WebAssembly.

Fibonacci Example

param arg0

var fib

fib = func(x) {
    if x == 0 {
        return 0
    } else if x == 1 {
        return 1
    }
    return fib(x-1) + fib(x-2)
}
return fib(arg0)

Features

  • Written in native Go (no cgo).
  • Supports Go 1.15 and above.
  • if else statements.
  • for and for in statements.
  • try catch finally statements.
  • param, global, var and const declarations.
  • Rich builtins.
  • Pure Gad and Go Module support.
  • Go like syntax with additions.
  • Call Gad functions from Go.
  • Import Gad modules from any source (file system, HTTP, etc.).
  • Create wrapper functions for Go functions using code generation.

Why Gad

Gad (Hebrew: גָּד‎, Modern: Gad, Tiberian: Gāḏ, "luck") was, according to the Book of Genesis, the first of the two sons of Jacob and Zilpah (Jacob's seventh son) and the founder of the Israelite tribe of Gad.[2] The text of the Book of Genesis implies that the name of Gad means luck/fortunate, in Hebrew.

Quick Start

go get github.com/gad-lang/gad@latest

Gad has a REPL application to learn and test Gad scripts.

go install github.com/gad-lang/gad/cmd/gad@latest

./gad

repl-gif

This example is to show some features of Gad.

https://play.golang.org/p/1Tj6joRmLiX

package main

import (
    "fmt"

    "github.com/gad-lang/gad"
)

func main() {
    script := `
param ...args

mapEach := func(seq, fn) {

    if !isArray(seq) {
        return error("want array, got " + typeName(seq))
    }

    var out = []

    if sz := len(seq); sz > 0 {
        out = repeat([0], sz)
    } else {
        return out
    }

    try {
        for i, v in seq {
            out[i] = fn(v)
        }
    } catch err {
        println(err)
    } finally {
        return out, err
    }
}

global multiplier

v, err := mapEach(args, func(x) { return x*multiplier })
if err != nil {
    return err
}
return v
`

    bytecode, err := gad.Compile([]byte(script), gad.DefaultCompilerOptions)
    if err != nil {
        panic(err)
    }
    globals := gad.Map{"multiplier": gad.Int(2)}
    ret, err := gad.NewVM(bytecode).Run(
        globals,
        gad.Int(1), gad.Int(2), gad.Int(3), gad.Int(4),
    )
    if err != nil {
        panic(err)
    }
    fmt.Println(ret) // [2, 4, 6, 8]
}

TODO

  • Dollar as valid ident char
  • Nullisch Coalescing
  • Named arguments
  • Array Expansion
  • Array Comprehensions
  • Map Expansion
  • Map Comprehensions
  • Examples for best practices
  • Better Playground
  • Configurable Stdin, Stdout and Stderr per Virtual Machine
  • Deferring function calls
  • Concurrency support

Documentation

LICENSE

Gad is licensed under the MIT License.

See LICENSE for the full license text.

Acknowledgements

Gad is inspired by script language uGo by Ozan Hacıbekiroğlu. A special thanks to uGo's creater and contributors.

Documentation

Overview

Code generated by 'go generate'; DO NOT EDIT.

Index

Constants

View Source 
const (
	// True represents a true value.
	True = Bool(true)

	// False represents a false value.
	False = Bool(false)

	// Yes represents a flag on.
	Yes = Flag(true)

	// Yes represents a flag off.
	No = Flag(false)
)
View Source 
const (
	// AttrModuleName is a special attribute injected into modules to identify
	// the modules by name.
	AttrModuleName = "__module_name__"
)
View Source 
const MainName = "(main)"

Variables

View Source 
var (
	TOperator           = &Type{TypeName: "Operator", Parent: TBase}
	BinaryOperatorTypes = map[token.Token]*BinaryOperatorType{}
)
View Source 
var (
	TBinOpAdd       = &BinaryOperatorType{OpName: "Add", Token: token.Add}             // +
	TBinOpSub       = &BinaryOperatorType{OpName: "Sub", Token: token.Sub}             // -
	TBinOpMul       = &BinaryOperatorType{OpName: "Mul", Token: token.Mul}             // *
	TBinOpQuo       = &BinaryOperatorType{OpName: "Quo", Token: token.Quo}             // /
	TBinOpRem       = &BinaryOperatorType{OpName: "Rem", Token: token.Rem}             // %
	TBinOpAnd       = &BinaryOperatorType{OpName: "And", Token: token.And}             // &
	TBinOpOr        = &BinaryOperatorType{OpName: "Or", Token: token.Or}               // |
	TBinOpXor       = &BinaryOperatorType{OpName: "Xor", Token: token.Xor}             // ^
	TBinOpShl       = &BinaryOperatorType{OpName: "Shl", Token: token.Shl}             // <<
	TBinOpShr       = &BinaryOperatorType{OpName: "Shr", Token: token.Shr}             // >>
	TBinOpAndNot    = &BinaryOperatorType{OpName: "AndNot", Token: token.AndNot}       // &^
	TBinOpLAnd      = &BinaryOperatorType{OpName: "LAnd", Token: token.LAnd}           // &&
	TBinOpEqual     = &BinaryOperatorType{OpName: "Equal", Token: token.Equal}         // ==
	TBinOpNotEqual  = &BinaryOperatorType{OpName: "NotEqual", Token: token.NotEqual}   // !=
	TBinOpLess      = &BinaryOperatorType{OpName: "Less", Token: token.Less}           // <
	TBinOpGreater   = &BinaryOperatorType{OpName: "Greater", Token: token.Greater}     // >
	TBinOpLessEq    = &BinaryOperatorType{OpName: "LessEq", Token: token.LessEq}       // <=
	TBinOpGreaterEq = &BinaryOperatorType{OpName: "GreaterEq", Token: token.GreaterEq} // >=
)
View Source 
var (
	TNil,
	TFlag,
	TBool,
	TInt,
	TUint,
	TFloat,
	TDecimal,
	TChar,
	TRawStr,
	TStr,
	TBytes,
	TBuffer,
	TArray,
	TDict,
	TSyncDict,
	TKeyValue,
	TKeyValueArray,
	TError ObjectType

	TBuiltinFunction = &BuiltinObjType{
		NameValue: "builtinFunction",
	}
	TCallWrapper = &BuiltinObjType{
		NameValue: "callwrap",
	}
	TCompiledFunction = &BuiltinObjType{
		NameValue: "compiledFunction",
	}
	TFunction = &BuiltinObjType{
		NameValue: "function",
	}
	TKeyValueArrays = &BuiltinObjType{
		NameValue: "keyValueArrays",
	}
	TArgs = &BuiltinObjType{
		NameValue: "args",
	}
	TNamedArgs = &BuiltinObjType{
		NameValue: "namedArgs",
	}
	TObjectPtr = &BuiltinObjType{
		NameValue: "objectPtr",
	}
	TReader = &BuiltinObjType{
		NameValue: "reader",
	}
	TWriter = &BuiltinObjType{
		NameValue: "writer",
	}
	TDiscardWriter = &BuiltinObjType{
		NameValue: "discardWriter",
	}
	TObjectTypeArray = &BuiltinObjType{
		NameValue: "objectTypeArray",
	}
	TReflectMethod = &BuiltinObjType{
		NameValue: "reflectMethod",
	}
	TIndexGetProxy = &BuiltinObjType{
		NameValue: "indexGetProxy",
	}
)
View Source 
var (
	TAny                    = &Type{TypeName: "Any"}
	TSymbol                 = &Type{Parent: TAny, TypeName: "Symbol"}
	TIterationStateFlag     = &Type{Parent: TAny, TypeName: "IterationStateFlag"}
	IterationStop           = &Type{Parent: TIterationStateFlag, TypeName: "IterationStop"}
	IterationSkip           = &Type{Parent: TIterationStateFlag, TypeName: "IterationSkip"}
	TBase                   = &Type{Parent: TAny, TypeName: "Base"}
	TIterator               = &Type{Parent: TAny, TypeName: "Iterator"}
	TIterabler              = &Type{Parent: TAny, TypeName: "Iterabler"}
	TNilIterator            = &Type{Parent: TIterator, TypeName: "NilIterator"}
	TStateIterator          = &Type{Parent: TIterator, TypeName: "StateIterator"}
	TStrIterator            = &Type{Parent: TIterator, TypeName: "StrIterator"}
	TRawStrIterator         = &Type{Parent: TIterator, TypeName: "RawStrIterator"}
	TArrayIterator          = &Type{Parent: TIterator, TypeName: "ArrayIterator"}
	TDictIterator           = &Type{Parent: TIterator, TypeName: "DictIterator"}
	TBytesIterator          = &Type{Parent: TIterator, TypeName: "BytesIterator"}
	TKeyValueArrayIterator  = &Type{Parent: TIterator, TypeName: "KeyValueArrayIterator"}
	TKeyValueArraysIterator = &Type{Parent: TIterator, TypeName: "KeyValueArraysIterator"}
	TArgsIterator           = &Type{Parent: TIterator, TypeName: "ArgsIterator"}
	TReflectArrayIterator   = &Type{Parent: TIterator, TypeName: "ReflectArrayIterator"}
	TReflectMapIterator     = &Type{Parent: TIterator, TypeName: "ReflectMapIterator"}
	TReflectStructIterator  = &Type{Parent: TIterator, TypeName: "ReflectStructIterator"}
	TKeysIterator           = &Type{Parent: TIterator, TypeName: "KeysIterator"}
	TValuesIterator         = &Type{Parent: TIterator, TypeName: "ValuesIterator"}
	TEnumerateIterator      = &Type{Parent: TIterator, TypeName: "EnumerateIterator"}
	TItemsIterator          = &Type{Parent: TIterator, TypeName: "ItemsIterator"}
	TCallbackIterator       = &Type{Parent: TIterator, TypeName: "CallbackIterator"}
	TEachIterator           = &Type{Parent: TIterator, TypeName: "EachIterator"}
	TMapIterator            = &Type{Parent: TIterator, TypeName: "MapIterator"}
	TFilterIterator         = &Type{Parent: TIterator, TypeName: "FilterIterator"}
	TZipIterator            = &Type{Parent: TIterator, TypeName: "ZipIterator"}
	TPipedInvokeIterator    = &Type{Parent: TIterator, TypeName: "PipedInvokeIterator"}
)
View Source 
var (
	// DefaultCompilerOptions holds default Compiler options.
	DefaultCompilerOptions = CompilerOptions{
		OptimizerMaxCycle: 100,
		OptimizeConst:     true,
		OptimizeExpr:      true,
	}

	DefaultCompileOptions = CompileOptions{
		CompilerOptions: DefaultCompilerOptions,
	}
	// TraceCompilerOptions holds Compiler options to print trace output
	// to stdout for Parser, Optimizer, Compiler.
	TraceCompilerOptions = CompilerOptions{
		Trace:             os.Stdout,
		TraceParser:       true,
		TraceCompiler:     true,
		TraceOptimizer:    true,
		OptimizerMaxCycle: 1<<8 - 1,
		OptimizeConst:     true,
		OptimizeExpr:      true,
	}
)
View Source 
var (
	// ErrSymbolLimit represents a symbol limit error which is returned by
	// Compiler when number of local symbols exceeds the symbo limit for
	// a function that is 256.
	ErrSymbolLimit = &Error{
		Name:    "SymbolLimitError",
		Message: "number of local symbols exceeds the limit",
	}

	// ErrStackOverflow represents a stack overflow error.
	ErrStackOverflow = &Error{Name: "StackOverflowError"}

	// ErrVMAborted represents a VM aborted error.
	ErrVMAborted = &Error{Name: "VMAbortedError"}

	// ErrWrongNumArguments represents a wrong number of arguments error.
	ErrWrongNumArguments = &Error{Name: "WrongNumberOfArgumentsError"}

	// ErrInvalidOperator represents an error for invalid operator usage.
	ErrInvalidOperator = &Error{Name: "InvalidOperatorError"}

	// ErrIndexOutOfBounds represents an out of bounds index error.
	ErrIndexOutOfBounds = &Error{Name: "IndexOutOfBoundsError"}

	// ErrInvalidIndex represents an invalid index error.
	ErrInvalidIndex = &Error{Name: "InvalidIndexError"}

	// ErrNotIterable is an error where an Object is not iterable.
	ErrNotIterable = &Error{Name: "NotIterableError"}

	// ErrNotIndexable is an error where an Object is not indexable.
	ErrNotIndexable = &Error{Name: "NotIndexableError"}

	// ErrNotIndexAssignable is an error where an Object is not index assignable.
	ErrNotIndexAssignable = &Error{Name: "NotIndexAssignableError"}

	// ErrNotIndexDeletable is an error where an Object is not index deletable.
	ErrNotIndexDeletable = &Error{Name: "NotIndexDeletableError"}

	// ErrNotCallable is an error where Object is not callable.
	ErrNotCallable = &Error{Name: "NotCallableError"}

	// ErrNotImplemented is an error where an Object has not implemented a required method.
	ErrNotImplemented = &Error{Name: "NotImplementedError"}

	// ErrZeroDivision is an error where divisor is zero.
	ErrZeroDivision = &Error{Name: "ZeroDivisionError"}

	// ErrUnexpectedNamedArg is an error where unexpected kwarg.
	ErrUnexpectedNamedArg = &Error{Name: "ErrUnexpectedNamedArg"}

	// ErrUnexpectedArgValue is an error where unexpected argument value.
	ErrUnexpectedArgValue = &Error{Name: "ErrUnexpectedArgValue"}

	// ErrIncompatibleCast is an error where incompatible cast.
	ErrIncompatibleCast = &Error{Name: "ErrIncompatibleCast"}

	// ErrIncompatibleReflectFuncType is an error where incompatible reflect func type.
	ErrIncompatibleReflectFuncType = &Error{Name: "ErrIncompatibleReflectFuncType"}

	// ErrReflectCallPanicsType is an error where call reflect function panics.
	ErrReflectCallPanicsType = &Error{Name: "ErrReflectCallPanicsType"}

	// ErrMethodDuplication is an error where method was duplication.
	ErrMethodDuplication = &Error{Name: "ErrMethodDuplication"}

	// ErrType represents a type error.
	ErrType = &Error{Name: "TypeError"}

	// ErrNotInitializable represents a not initializable type error.
	ErrNotInitializable = &Error{Name: "ErrNotInitializable"}

	// ErrNotWriteable represents a not writeable type error.
	ErrNotWriteable = &Error{Name: "ErrNotWriteable"}
)
View Source 
var (
	ReprQuote      = repr.Quote
	ReprQuoteTyped = repr.QuoteTyped
)
View Source 
var BuiltinObjects = BuiltinObjectsMap{

	BuiltinMakeArray: &BuiltinFunction{
		Name:                  ":makeArray",
		Value:                 funcPiOROe(BuiltinMakeArrayFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinBinaryOp: &BuiltinFunction{
		Name:  "binaryOp",
		Value: BuiltinBinaryOpFunc,
	},
	BuiltinCast: &BuiltinFunction{
		Name:  "cast",
		Value: BuiltinCastFunc,
	},
	BuiltinChars: &BuiltinFunction{
		Name:  "chars",
		Value: funcPOROe(BuiltinCharsFunc),
	},
	BuiltinAppend: &BuiltinFunction{
		Name:  "append",
		Value: BuiltinAppendFunc,
	},
	BuiltinDelete: &BuiltinFunction{
		Name:  "delete",
		Value: BuiltinDeleteFunc,
	},
	BuiltinCopy: &BuiltinFunction{
		Name:  "copy",
		Value: BuiltinCopyFunc,
	},
	BuiltinDeepCopy: &BuiltinFunction{
		Name:  "dcopy",
		Value: BuiltinDeepCopyFunc,
	},
	BuiltinRepeat: &BuiltinFunction{
		Name:  "repeat",
		Value: funcPOiROe(BuiltinRepeatFunc),
	},
	BuiltinContains: &BuiltinFunction{
		Name:  "contains",
		Value: funcPOOROe(BuiltinContainsFunc),
	},
	BuiltinLen: &BuiltinFunction{
		Name:  "len",
		Value: funcPORO(BuiltinLenFunc),
	},
	BuiltinCap: &BuiltinFunction{
		Name:  "cap",
		Value: funcPORO(BuiltinCapFunc),
	},
	BuiltinSort: &BuiltinFunction{
		Name:  "sort",
		Value: funcPpVM_OCo_less_ROe(BuiltinSortFunc),
	},
	BuiltinSortReverse: &BuiltinFunction{
		Name:  "sortReverse",
		Value: funcPpVM_OCo_less_ROe(BuiltinSortReverseFunc),
	},
	BuiltinTypeName: &BuiltinFunction{
		Name:                  "typeName",
		Value:                 funcPORO(BuiltinTypeNameFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinPrint: &BuiltinFunction{
		Name:  "print",
		Value: BuiltinPrintFunc,
	},
	BuiltinPrintf: &BuiltinFunction{
		Name:  "printf",
		Value: BuiltinPrintfFunc,
	},
	BuiltinPrintln: &BuiltinFunction{
		Name:  "println",
		Value: BuiltinPrintlnFunc,
	},
	BuiltinSprintf: &BuiltinFunction{
		Name:                  "sprintf",
		Value:                 BuiltinSprintfFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinGlobals: &BuiltinFunction{
		Name:                  "globals",
		Value:                 BuiltinGlobalsFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinRepr: &BuiltinFunction{
		Name:  "repr",
		Value: BuiltinReprFunc,
	},
	BuiltinNamedParamTypeCheck: &BuiltinFunction{
		Name:                  "namedParamTypeCheck",
		Value:                 BuiltinNamedParamTypeCheckFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinIs: &BuiltinFunction{
		Name:                  "is",
		Value:                 BuiltinIsFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinIsError: &BuiltinFunction{
		Name:                  "isError",
		Value:                 BuiltinIsErrorFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinIsInt: &BuiltinFunction{
		Name:                  "isInt",
		Value:                 funcPORO(BuiltinIsIntFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsUint: &BuiltinFunction{
		Name:                  "isUint",
		Value:                 funcPORO(BuiltinIsUintFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsFloat: &BuiltinFunction{
		Name:                  "isFloat",
		Value:                 funcPORO(BuiltinIsFloatFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsChar: &BuiltinFunction{
		Name:                  "isChar",
		Value:                 funcPORO(BuiltinIsCharFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsBool: &BuiltinFunction{
		Name:                  "isBool",
		Value:                 funcPORO(BuiltinIsBoolFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsStr: &BuiltinFunction{
		Name:                  "isStr",
		Value:                 funcPORO(BuiltinIsStrFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsRawStr: &BuiltinFunction{
		Name:                  "isRawStr",
		Value:                 funcPORO(BuiltinIsRawStrFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsBytes: &BuiltinFunction{
		Name:                  "isBytes",
		Value:                 funcPORO(BuiltinIsBytesFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsDict: &BuiltinFunction{
		Name:                  "isDict",
		Value:                 funcPORO(BuiltinIsDictFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsSyncDict: &BuiltinFunction{
		Name:                  "isSyncDict",
		Value:                 funcPORO(BuiltinIsSyncDictFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsArray: &BuiltinFunction{
		Name:                  "isArray",
		Value:                 funcPORO(BuiltinIsArrayFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsNil: &BuiltinFunction{
		Name:                  "isNil",
		Value:                 funcPORO(BuiltinIsNilFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsFunction: &BuiltinFunction{
		Name:                  "isFunction",
		Value:                 funcPORO(BuiltinIsFunctionFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinIsCallable: &BuiltinFunction{
		Name:  "isCallable",
		Value: funcPORO(BuiltinIsCallableFunc),
	},
	BuiltinIsIterable: &BuiltinFunction{
		Name:  "isIterable",
		Value: funcPpVM_ORO(BuiltinIsIterableFunc),
	},
	BuiltinIsIterator: &BuiltinFunction{
		Name:  "isIterator",
		Value: funcPORO(BuiltinIsIteratorFunc),
	},
	BuiltinStdIO: &BuiltinFunction{
		Name:  "stdio",
		Value: BuiltinStdIOFunc,
	},
	BuiltinWrap: &BuiltinFunction{
		Name:  "wrap",
		Value: BuiltinWrapFunc,
	},
	BuiltinStruct: &BuiltinFunction{
		Name:                  "struct",
		Value:                 BuiltinStructFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinNew: &BuiltinFunction{
		Name:  "new",
		Value: BuiltinNewFunc,
	},
	BuiltinTypeOf: &BuiltinFunction{
		Name:                  "typeof",
		Value:                 BuiltinTypeOfFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinAddCallMethod: &BuiltinFunction{
		Name:                  "addCallMethod",
		Value:                 funcPpVM_CoCob_override_Re(BuiltinAddCallMethodFunc),
		AcceptMethodsDisabled: true,
	},
	BuiltinRawCaller: &BuiltinFunction{
		Name:                  "rawCaller",
		Value:                 BuiltinRawCallerFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinVMPushWriter: &BuiltinFunction{
		Name:                  "vmPushWriter",
		Value:                 BuiltinPushWriterFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinVMPopWriter: &BuiltinFunction{
		Name:  "vmPopWriter",
		Value: BuiltinPopWriterFunc,
	},
	BuiltinOBStart: &BuiltinFunction{
		Name:                  "obstart",
		Value:                 BuiltinOBStartFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinOBEnd: &BuiltinFunction{
		Name:                  "obend",
		Value:                 BuiltinOBEndFunc,
		AcceptMethodsDisabled: true,
	},
	BuiltinFlush: &BuiltinFunction{
		Name:  "flush",
		Value: BuiltinFlushFunc,
	},
	BuiltinUserData: &BuiltinFunction{
		Name:  "userData",
		Value: BuiltinUserDataFunc,
	},

	BuiltinWrongNumArgumentsError:  ErrWrongNumArguments,
	BuiltinInvalidOperatorError:    ErrInvalidOperator,
	BuiltinIndexOutOfBoundsError:   ErrIndexOutOfBounds,
	BuiltinNotIterableError:        ErrNotIterable,
	BuiltinNotIndexableError:       ErrNotIndexable,
	BuiltinNotIndexAssignableError: ErrNotIndexAssignable,
	BuiltinNotCallableError:        ErrNotCallable,
	BuiltinNotImplementedError:     ErrNotImplemented,
	BuiltinZeroDivisionError:       ErrZeroDivision,
	BuiltinTypeError:               ErrType,

	BuiltinDiscardWriter: DiscardWriter,
}

BuiltinObjects is list of builtins, exported for REPL.

View Source 
var BuiltinsMap = map[string]BuiltinType{
	"binaryOp":            BuiltinBinaryOp,
	"cast":                BuiltinCast,
	"append":              BuiltinAppend,
	"delete":              BuiltinDelete,
	"copy":                BuiltinCopy,
	"dcopy":               BuiltinDeepCopy,
	"repeat":              BuiltinRepeat,
	"contains":            BuiltinContains,
	"len":                 BuiltinLen,
	"sort":                BuiltinSort,
	"sortReverse":         BuiltinSortReverse,
	"filter":              BuiltinFilter,
	"map":                 BuiltinMap,
	"each":                BuiltinEach,
	"reduce":              BuiltinReduce,
	"typeName":            BuiltinTypeName,
	"chars":               BuiltinChars,
	"write":               BuiltinWrite,
	"print":               BuiltinPrint,
	"printf":              BuiltinPrintf,
	"println":             BuiltinPrintln,
	"sprintf":             BuiltinSprintf,
	"globals":             BuiltinGlobals,
	"stdio":               BuiltinStdIO,
	"wrap":                BuiltinWrap,
	"struct":              BuiltinStruct,
	"new":                 BuiltinNew,
	"typeof":              BuiltinTypeOf,
	"addCallMethod":       BuiltinAddCallMethod,
	"rawCaller":           BuiltinRawCaller,
	"repr":                BuiltinRepr,
	"userData":            BuiltinUserData,
	"namedParamTypeCheck": BuiltinNamedParamTypeCheck,

	"is":         BuiltinIs,
	"isError":    BuiltinIsError,
	"isInt":      BuiltinIsInt,
	"isUint":     BuiltinIsUint,
	"isFloat":    BuiltinIsFloat,
	"isChar":     BuiltinIsChar,
	"isBool":     BuiltinIsBool,
	"isStr":      BuiltinIsStr,
	"isRawStr":   BuiltinIsRawStr,
	"isBytes":    BuiltinIsBytes,
	"isDict":     BuiltinIsDict,
	"isSyncDict": BuiltinIsSyncDict,
	"isArray":    BuiltinIsArray,
	"isNil":      BuiltinIsNil,
	"isFunction": BuiltinIsFunction,
	"isCallable": BuiltinIsCallable,
	"isIterable": BuiltinIsIterable,
	"isIterator": BuiltinIsIterator,

	"WrongNumArgumentsError":  BuiltinWrongNumArgumentsError,
	"InvalidOperatorError":    BuiltinInvalidOperatorError,
	"IndexOutOfBoundsError":   BuiltinIndexOutOfBoundsError,
	"NotIterableError":        BuiltinNotIterableError,
	"NotIndexableError":       BuiltinNotIndexableError,
	"NotIndexAssignableError": BuiltinNotIndexAssignableError,
	"NotCallableError":        BuiltinNotCallableError,
	"NotImplementedError":     BuiltinNotImplementedError,
	"ZeroDivisionError":       BuiltinZeroDivisionError,
	"TypeError":               BuiltinTypeError,

	":makeArray": BuiltinMakeArray,
	"cap":        BuiltinCap,

	"iterate":       BuiltinIterate,
	"keys":          BuiltinKeys,
	"values":        BuiltinValues,
	"items":         BuiltinItems,
	"collect":       BuiltinCollect,
	"enumerate":     BuiltinEnumerate,
	"iterator":      BuiltinIterator,
	"iteratorInput": BuiltinIteratorInput,
	"zip":           BuiltinZipIterator,
	"keyValue":      BuiltinKeyValue,
	"keyValueArray": BuiltinKeyValueArray,

	"vmPushWriter":   BuiltinVMPushWriter,
	"vmPopWriter":    BuiltinVMPopWriter,
	"obstart":        BuiltinOBStart,
	"obend":          BuiltinOBEnd,
	"flush":          BuiltinFlush,
	"DISCARD_WRITER": BuiltinDiscardWriter,
}

BuiltinsMap is list of builtin types, exported for REPL.

View Source 
var DecimalZero = Decimal(decimal.Zero)
View Source 
var DiscardWriter = NewTypedWriter(io.Discard, TDiscardWriter)
View Source 
var EmptyNamedArgs = &NamedArgs{ro: true}
View Source 
var OpcodeNames = [...]string{
	OpNoOp:          "NOOP",
	OpConstant:      "CONSTANT",
	OpCall:          "CALL",
	OpGetGlobal:     "GETGLOBAL",
	OpSetGlobal:     "SETGLOBAL",
	OpGetLocal:      "GETLOCAL",
	OpSetLocal:      "SETLOCAL",
	OpGetBuiltin:    "GETBUILTIN",
	OpBinaryOp:      "BINARYOP",
	OpUnary:         "UNARY",
	OpEqual:         "EQUAL",
	OpNotEqual:      "NOTEQUAL",
	OpJump:          "JUMP",
	OpJumpFalsy:     "JUMPFALSY",
	OpAndJump:       "ANDJUMP",
	OpOrJump:        "ORJUMP",
	OpMap:           "MAP",
	OpArray:         "ARRAY",
	OpSliceIndex:    "SLICEINDEX",
	OpGetIndex:      "GETINDEX",
	OpSetIndex:      "SETINDEX",
	OpNull:          "NULL",
	OpStdIn:         "STDIN",
	OpStdOut:        "STDOUT",
	OpStdErr:        "STDERR",
	OpDotName:       "DOTNAME",
	OpDotFile:       "DOTFILE",
	OpIsModule:      "ISMODULE",
	OpPop:           "POP",
	OpGetFree:       "GETFREE",
	OpSetFree:       "SETFREE",
	OpGetLocalPtr:   "GETLOCALPTR",
	OpGetFreePtr:    "GETFREEPTR",
	OpClosure:       "CLOSURE",
	OpIterInit:      "ITERINIT",
	OpIterNext:      "ITERNEXT",
	OpIterNextElse:  "ITERNEXTELSE",
	OpIterKey:       "ITERKEY",
	OpIterValue:     "ITERVALUE",
	OpLoadModule:    "LOADMODULE",
	OpStoreModule:   "STOREMODULE",
	OpReturn:        "RETURN",
	OpSetupTry:      "SETUPTRY",
	OpSetupCatch:    "SETUPCATCH",
	OpSetupFinally:  "SETUPFINALLY",
	OpThrow:         "THROW",
	OpFinalizer:     "FINALIZER",
	OpDefineLocal:   "DEFINELOCAL",
	OpTrue:          "TRUE",
	OpFalse:         "FALSE",
	OpYes:           "YES",
	OpNo:            "NO",
	OpCallName:      "CALLNAME",
	OpJumpNil:       "JUMPNULL",
	OpJumpNotNil:    "JUMPNOTNULL",
	OpKeyValueArray: "KVARRAY",
	OpKeyValue:      "KV",
	OpCallee:        "CALLEE",
	OpArgs:          "ARGS",
	OpNamedArgs:     "NAMEDARGS",
	OpIsNil:         "ISNIL",
	OpNotIsNil:      "NOTISNIL",
}

OpcodeNames are string representation of opcodes.

View Source 
var OpcodeOperands = [...][]int{
	OpNoOp:          {},
	OpConstant:      {2},
	OpCall:          {1, 1},
	OpGetGlobal:     {2},
	OpSetGlobal:     {2},
	OpGetLocal:      {1},
	OpSetLocal:      {1},
	OpGetBuiltin:    {2},
	OpBinaryOp:      {1},
	OpUnary:         {1},
	OpEqual:         {},
	OpNotEqual:      {},
	OpIsNil:         {},
	OpNotIsNil:      {},
	OpJump:          {2},
	OpJumpFalsy:     {2},
	OpAndJump:       {2},
	OpOrJump:        {2},
	OpMap:           {2},
	OpArray:         {2},
	OpSliceIndex:    {},
	OpGetIndex:      {1},
	OpSetIndex:      {},
	OpNull:          {},
	OpStdIn:         {},
	OpStdOut:        {},
	OpStdErr:        {},
	OpDotName:       {},
	OpDotFile:       {},
	OpIsModule:      {},
	OpPop:           {},
	OpGetFree:       {1},
	OpSetFree:       {1},
	OpGetLocalPtr:   {1},
	OpGetFreePtr:    {1},
	OpClosure:       {2, 1},
	OpIterInit:      {},
	OpIterNext:      {},
	OpIterNextElse:  {2, 2},
	OpIterKey:       {},
	OpIterValue:     {},
	OpLoadModule:    {2, 2},
	OpStoreModule:   {2},
	OpReturn:        {1},
	OpSetupTry:      {2, 2},
	OpSetupCatch:    {},
	OpSetupFinally:  {},
	OpThrow:         {1},
	OpFinalizer:     {1},
	OpDefineLocal:   {1},
	OpTrue:          {},
	OpFalse:         {},
	OpYes:           {},
	OpNo:            {},
	OpCallName:      {1, 1},
	OpJumpNil:       {2},
	OpJumpNotNil:    {2},
	OpKeyValueArray: {2},
	OpCallee:        {},
	OpArgs:          {},
	OpNamedArgs:     {},
	OpKeyValue:      {1},
}

OpcodeOperands is the number of operands.

View Source 
var Types = map[reflect.Type]ObjectType{}

Functions

func ArrayRepr 

func ArrayRepr(typName string, vm *VM, len int, get func(i int) Object) (_ string, err error)

func ArrayToString 

func ArrayToString(len int, get func(i int) Object) string

func BuiltinAddCallMethodFunc 

func BuiltinAddCallMethodFunc(vm *VM, fn CallerObject, handler CallerObject, override bool) (err error)

func Callable 

func Callable(o Object) (ok bool)

func Filterable 

func Filterable(obj Object) bool

func FormatInstructions 

func FormatInstructions(b []byte, posOffset int) []string

FormatInstructions returns string representation of bytecode instructions.

func IsIndexDeleter 

func IsIndexDeleter(obj Object) (ok bool)

func IsIndexGetter 

func IsIndexGetter(obj Object) (ok bool)

func IsIndexSetter 

func IsIndexSetter(obj Object) (ok bool)

func IsIterator 

func IsIterator(obj Object) bool

func IsObjector 

func IsObjector(obj Object) (ok bool)

func IsType 

func IsType(obj Object) (ok bool)

func IsTypeAssignableTo 

func IsTypeAssignableTo(a, b ObjectType) bool

func IsZero 

func IsZero(value interface{}) bool

func Iterable 

func Iterable(vm *VM, obj Object) bool

func Iterate 

func Iterate(vm *VM, it Iterator, init func(state *IteratorState) error, cb func(e *KeyValue) error) (err error)

func IterateInstructions 

func IterateInstructions(insts []byte,
	fn func(pos int, opcode Opcode, operands []int, offset int) bool)

IterateInstructions iterate instructions and call given function for each instruction. Note: Do not use operands slice in callback, it is reused for less allocation.

func IterateObject 

func IterateObject(vm *VM, o Object, na *NamedArgs, init func(state *IteratorState) error, cb func(e *KeyValue) error) (err error)

func IteratorStateCheck 

func IteratorStateCheck(vm *VM, it Iterator, state *IteratorState) (err error)

func MakeInstruction 

func MakeInstruction(buf []byte, op Opcode, args ...int) ([]byte, error)

MakeInstruction returns a bytecode for an Opcode and the operands.

Provide "buf" slice which is a returning value to reduce allocation or nil to create new byte slice. This is implemented to reduce compilation allocation that resulted in -15% allocation, +2% speed in compiler. It takes ~8ns/op with zero allocation.

Returning error is required to identify bugs faster when VM and Opcodes are under heavy development.

Warning: Unknown Opcode causes panic!

func Mapable 

func Mapable(obj Object) bool

func NamedParamTypeCheck 

func NamedParamTypeCheck(name string, typeso, value Object) (badTypes string, err error)

func NamedParamTypeCheckAssertion 

func NamedParamTypeCheckAssertion(name string, assertion *TypeAssertion, value Object) (err error)

func NewArgCaller 

func NewArgCaller(vm *VM, co CallerObject, args Array, namedArgs NamedArgs) func() (ret Object, err error)

func ReadOperands 

func ReadOperands(numOperands []int, ins []byte, operands []int) ([]int, int)

ReadOperands reads operands from the bytecode. Given operands slice is used to fill operands and is returned to allocate less.

func Reducable 

func Reducable(obj Object) bool

func ToCode 

func ToCode(o Object) string

func ToGoBool 

func ToGoBool(o Object) (v bool, ok bool)

ToGoBool will try to convert an Object to ToInterface bool value.

func ToGoByteSlice 

func ToGoByteSlice(o Object) (v []byte, ok bool)

ToGoByteSlice will try to convert an Object to ToInterface byte slice.

func ToGoFloat64 

func ToGoFloat64(o Object) (v float64, ok bool)

ToGoFloat64 will try to convert a numeric, bool or string Object to ToInterface float64 value.

func ToGoInt 

func ToGoInt(o Object) (v int, ok bool)

ToGoInt will try to convert a numeric, bool or string Object to ToInterface int value.

func ToGoInt64 

func ToGoInt64(o Object) (v int64, ok bool)

ToGoInt64 will try to convert a numeric, bool or string Object to ToInterface int64 value.

func ToGoRune 

func ToGoRune(o Object) (v rune, ok bool)

ToGoRune will try to convert a int like Object to ToInterface rune value.

func ToGoString 

func ToGoString(o Object) (v string, ok bool)

ToGoString will try to convert an Object to ToInterface string value.

func ToGoUint64 

func ToGoUint64(o Object) (v uint64, ok bool)

ToGoUint64 will try to convert a numeric, bool or string Object to ToInterface uint64 value.

func ToInterface 

func ToInterface(o Object) (ret any)

ToInterface tries to convert an Object o to an any value.

func ToReprTypedRS 

func ToReprTypedRS(vm *VM, typ ObjectType, o any) (s string, err error)

func ToReprTypedS 

func ToReprTypedS(vm *VM, typ ObjectType, o Object) (_ string, err error)

func ToWritable 

func ToWritable(obj Object) bool

func WithArgs 

func WithArgs(args ...Object) func(c *Call)

func WithArgsV 

func WithArgsV(args []Object, vargs ...Object) func(c *Call)

func WithNamedArgs 

func WithNamedArgs(na *NamedArgs) func(c *Call)

func WrapIterator 

func WrapIterator(iterator Iterator, wrap func(state *IteratorState) error) *wrapIterator

Types

type Adder 

type Adder interface {
	Object
	Add(vm *VM, arr ...Object) (err error)
}

type Appender 

type Appender interface {
	Object
	Append(vm *VM, arr ...Object) (Object, error)
}

type Arg 

type Arg struct {
	Name  string
	Value Object
	*TypeAssertion
}

Arg is a struct to destructure arguments from Call object.

type ArgType 

type ArgType []ObjectType

func (ArgType) String 

func (t ArgType) String() string

type Args 

type Args []Array

func (Args) Array 

func (o Args) Array() (ret Array)

func (Args) BinaryOp 

func (o Args) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

func (Args) CheckLen 

func (o Args) CheckLen(n int) error

CheckLen checks the number of arguments and variadic arguments. If the number of arguments is not equal to n, it returns an error.

func (Args) CheckMaxLen 

func (o Args) CheckMaxLen(n int) error

CheckMaxLen checks the number of arguments and variadic arguments. If the number of arguments is greather then to n, it returns an error.

func (Args) CheckMinLen 

func (o Args) CheckMinLen(n int) error

CheckMinLen checks the number of arguments and variadic arguments. If the number of arguments is less then to n, it returns an error.

func (Args) CheckRangeLen 

func (o Args) CheckRangeLen(min, max int) error

CheckRangeLen checks the number of arguments and variadic arguments. If the number of arguments is less then to min or greather then to max, it returns an error.

func (Args) Copy 

func (o Args) Copy() Object

Copy implements Copier interface.

func (Args) DeepCopy 

func (o Args) DeepCopy(vm *VM) (r Object, err error)

DeepCopy implements DeepCopier interface.

func (Args) Destructure 

func (o Args) Destructure(dst ...*Arg) (err error)

Destructure shifts argument and set value to dst. If the number of arguments not equals to called args length, it returns an error. If type check of arg is fails, returns ArgumentTypeError.

func (Args) DestructureValue 

func (o Args) DestructureValue(dst ...*Arg) (err error)

DestructureValue shifts argument and set value to dst. If type check of arg is fails, returns ArgumentTypeError.

func (Args) DestructureVar 

func (o Args) DestructureVar(dst ...*Arg) (other Array, err error)

DestructureVar shifts argument and set value to dst, and returns left arguments. If the number of arguments is less then to called args length, it returns an error. If type check of arg is fails, returns ArgumentTypeError.

func (Args) Equal 

func (o Args) Equal(right Object) (ok bool)

func (Args) Get 

func (o Args) Get(n int) (v Object)

Get returns the nth argument. If n is greater than the number of arguments, it returns the nth variadic argument. If n is greater than the number of arguments and variadic arguments, it panics!

func (Args) GetDefault 

func (o Args) GetDefault(n int, defaul Object) (v Object)

GetDefault returns the nth argument. If n is greater than the number of arguments, it returns the nth variadic argument. If n is greater than the number of arguments and variadic arguments, return defaul.

func (Args) GetIJ 

func (o Args) GetIJ(n int) (i, j int, ok bool)

func (Args) GetOnly 

func (o Args) GetOnly(n int) Object

GetOnly returns the nth argument.

func (Args) IndexGet 

func (o Args) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (Args) IsFalsy 

func (o Args) IsFalsy() bool

func (Args) Iterate 

func (o Args) Iterate(_ *VM, na *NamedArgs) Iterator

func (Args) Length 

func (o Args) Length() (l int)

Length returns the number of arguments including variadic arguments.

func (Args) MustGet 

func (o Args) MustGet(n int) Object

MustGet returns the nth argument. If n is greater than the number of arguments, it returns the nth variadic argument or Nil.

func (*Args) Prepend 

func (o *Args) Prepend(items ...Object)

func (*Args) Shift 

func (o *Args) Shift() (v Object)

Shift returns the first argument and removes it from the arguments. If it cannot Shift, it returns nil.

func (Args) ShiftArg 

func (o Args) ShiftArg(shifts *int, dst *Arg) (ok bool, err error)

ShiftArg shifts argument and set value to dst. If is empty, retun ok as false. If type check of arg is fails, returns ArgumentTypeError.

func (*Args) ShiftOk 

func (o *Args) ShiftOk() (Object, bool)

ShiftOk returns the first argument and removes it from the arguments. It updates the arguments and variadic arguments accordingly. If it cannot ShiftOk, it returns nil and false.

func (Args) ToString 

func (o Args) ToString() string

func (Args) Type 

func (o Args) Type() ObjectType

func (Args) Values 

func (o Args) Values() (ret Array)

func (Args) Walk 

func (o Args) Walk(cb func(i int, arg Object) any) (v any)

Walk iterates over all values and call callback function.

func (Args) WalkSkip 

func (o Args) WalkSkip(skip int, cb func(i int, arg Object) any) (v any)

WalkSkip iterates over all values skiping skip and call callback function.

type Array 

type Array []Object

Array represents array of objects and implements Object interface.

func CollectCb 

func CollectCb(vm *VM, o Object, na *NamedArgs, cb func(e *KeyValue, i *Int) Object) (values Array, err error)

func ToArray 

func ToArray(o Object) (v Array, ok bool)

ToArray will try to convert an Object to Gad array value.

func ValuesOf 

func ValuesOf(vm *VM, o Object, na *NamedArgs) (values Array, err error)

func (*Array) Add 

func (o *Array) Add(_ *VM, items ...Object) error

func (Array) Append 

func (o Array) Append(_ *VM, items ...Object) (Object, error)

func (Array) AppendToArray 

func (o Array) AppendToArray(arr *Array)

func (Array) BinaryOp 

func (o Array) BinaryOp(vm *VM, tok token.Token, right Object) (_ Object, err error)

BinaryOp implements Object interface.

func (Array) Copy 

func (o Array) Copy() Object

Copy implements Copier interface.

func (Array) DeepCopy 

func (o Array) DeepCopy(vm *VM) (_ Object, err error)

DeepCopy implements DeepCopier interface.

func (Array) Equal 

func (o Array) Equal(right Object) bool

Equal implements Object interface.

func (Array) Format 

func (o Array) Format(f fmt.State, verb rune)

func (Array) IndexGet 

func (o Array) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (Array) IndexSet 

func (o Array) IndexSet(_ *VM, index, value Object) error

IndexSet implements Object interface.

func (Array) IsFalsy 

func (o Array) IsFalsy() bool

IsFalsy implements Object interface.

func (Array) Items 

func (o Array) Items(*VM) (arr KeyValueArray, _ error)

func (Array) Iterate 

func (o Array) Iterate(_ *VM, na *NamedArgs) Iterator

func (Array) Keys 

func (o Array) Keys() (arr Array)

func (Array) Length 

func (o Array) Length() int

Length implements LengthGetter interface.

func (Array) Repr 

func (o Array) Repr(vm *VM) (string, error)

func (Array) Sort 

func (o Array) Sort(vm *VM, less CallerObject) (_ Object, err error)

func (Array) SortReverse 

func (o Array) SortReverse(vm *VM) (_ Object, err error)

func (Array) ToAnyArray 

func (o Array) ToAnyArray(vm *VM) []any

func (Array) ToInterface 

func (o Array) ToInterface(vm *VM) any

func (Array) ToString 

func (o Array) ToString() string

func (Array) Type 

func (o Array) Type() ObjectType

type BinaryOperatorHandler 

type BinaryOperatorHandler interface {
	// BinaryOp handles +,-,*,/,%,<<,>>,<=,>=,<,> operators.
	// Returned error stops VM execution if not handled with an error handler
	// and VM.Run returns the same error as wrapped.
	BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)
}

type BinaryOperatorType 

type BinaryOperatorType struct {
	OpName string
	Token  token.Token
}

func (BinaryOperatorType) Call 

func (BinaryOperatorType) Call(Call) (Object, error)

func (*BinaryOperatorType) Equal 

func (b *BinaryOperatorType) Equal(right Object) bool

func (BinaryOperatorType) Fields 

func (BinaryOperatorType) Fields() Dict

func (BinaryOperatorType) Getters 

func (BinaryOperatorType) Getters() Dict

func (BinaryOperatorType) IsChildOf 

func (BinaryOperatorType) IsChildOf(t ObjectType) bool

func (*BinaryOperatorType) IsFalsy 

func (b *BinaryOperatorType) IsFalsy() bool

func (BinaryOperatorType) Methods 

func (BinaryOperatorType) Methods() Dict

func (BinaryOperatorType) MethodsDisabled 

func (BinaryOperatorType) MethodsDisabled() bool

func (*BinaryOperatorType) Name 

func (b *BinaryOperatorType) Name() string

func (BinaryOperatorType) New 

func (BinaryOperatorType) New(*VM, Dict) (Object, error)

func (BinaryOperatorType) Setters 

func (BinaryOperatorType) Setters() Dict

func (BinaryOperatorType) ToString 

func (b BinaryOperatorType) ToString() string

func (BinaryOperatorType) Type 

func (b BinaryOperatorType) Type() ObjectType

type Bool 

type Bool bool

Bool represents boolean values and implements Object interface.

func ToBool 

func ToBool(o Object) (v Bool, ok bool)

ToBool will try to convert an Object to Gad bool value.

func (Bool) BinaryOp 

func (o Bool) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Bool) Equal 

func (o Bool) Equal(right Object) bool

Equal implements Object interface.

func (Bool) Format 

func (o Bool) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Bool) IsFalsy 

func (o Bool) IsFalsy() bool

IsFalsy implements Object interface.

func (Bool) ToString 

func (o Bool) ToString() string

func (Bool) Type 

func (o Bool) Type() ObjectType

type Buffer 

type Buffer struct {
	bytes.Buffer
}

func (*Buffer) CallName 

func (o *Buffer) CallName(name string, c Call) (Object, error)

func (*Buffer) Equal 

func (o *Buffer) Equal(right Object) bool

func (*Buffer) GoReader 

func (o *Buffer) GoReader() io.Reader

func (*Buffer) GoWriter 

func (o *Buffer) GoWriter() io.Writer

func (*Buffer) IndexGet 

func (o *Buffer) IndexGet(_ *VM, index Object) (Object, error)

IndexGet represents string values and implements Object interface.

func (*Buffer) IndexSet 

func (o *Buffer) IndexSet(_ *VM, index, value Object) error

IndexSet implements Object interface.

func (*Buffer) IsFalsy 

func (o *Buffer) IsFalsy() bool

func (*Buffer) Iterate 

func (o *Buffer) Iterate(_ *VM, na *NamedArgs) Iterator

func (*Buffer) Length 

func (o *Buffer) Length() int

func (*Buffer) ToBytes 

func (o *Buffer) ToBytes() (Bytes, error)

func (*Buffer) ToString 

func (o *Buffer) ToString() string

func (*Buffer) Type 

func (o *Buffer) Type() ObjectType

type BuiltinFunction 

type BuiltinFunction struct {
	ObjectImpl
	Name                  string
	Value                 func(Call) (Object, error)
	Header                FunctionHeader
	AcceptMethodsDisabled bool
}

BuiltinFunction represents a builtin function object and implements Object interface.

func (*BuiltinFunction) Call 

func (o *BuiltinFunction) Call(c Call) (Object, error)

func (*BuiltinFunction) Copy 

func (o *BuiltinFunction) Copy() Object

Copy implements Copier interface.

func (*BuiltinFunction) Equal 

func (o *BuiltinFunction) Equal(right Object) bool

Equal implements Object interface.

func (*BuiltinFunction) IsFalsy 

func (*BuiltinFunction) IsFalsy() bool

IsFalsy implements Object interface.

func (*BuiltinFunction) MethodsDisabled 

func (o *BuiltinFunction) MethodsDisabled() bool

func (*BuiltinFunction) ParamTypes 

func (o *BuiltinFunction) ParamTypes(*VM) (MultipleObjectTypes, error)

func (*BuiltinFunction) ToString 

func (o *BuiltinFunction) ToString() string

func (*BuiltinFunction) Type 

func (*BuiltinFunction) Type() ObjectType

type BuiltinModule 

type BuiltinModule struct {
	Attrs map[string]Object
}

BuiltinModule is an importable module that's written in ToInterface.

func (*BuiltinModule) Import 

func (m *BuiltinModule) Import(_ context.Context, moduleName string) (any, string, error)

Import returns an immutable map for the module.

type BuiltinObjType 

type BuiltinObjType struct {
	NameValue string
	Value     CallableFunc
	// contains filtered or unexported fields
}

func NewBuiltinObjType 

func NewBuiltinObjType(name string, init CallableFunc) *BuiltinObjType

func RegisterBuiltinType 

func RegisterBuiltinType(typ BuiltinType, name string, val any, init CallableFunc) *BuiltinObjType

func (*BuiltinObjType) Call 

func (b *BuiltinObjType) Call(c Call) (Object, error)

func (*BuiltinObjType) Equal 

func (b *BuiltinObjType) Equal(right Object) bool

func (*BuiltinObjType) Fields 

func (b *BuiltinObjType) Fields() Dict

func (*BuiltinObjType) Getters 

func (b *BuiltinObjType) Getters() Dict

func (*BuiltinObjType) IsChildOf 

func (b *BuiltinObjType) IsChildOf(t ObjectType) bool

func (*BuiltinObjType) IsFalsy 

func (b *BuiltinObjType) IsFalsy() bool

func (*BuiltinObjType) Methods 

func (b *BuiltinObjType) Methods() Dict

func (*BuiltinObjType) Name 

func (b *BuiltinObjType) Name() string

func (*BuiltinObjType) New 

func (b *BuiltinObjType) New(*VM, Dict) (Object, error)

func (*BuiltinObjType) Setters 

func (b *BuiltinObjType) Setters() Dict

func (*BuiltinObjType) String 

func (b *BuiltinObjType) String() string

func (*BuiltinObjType) ToString 

func (b *BuiltinObjType) ToString() string

func (*BuiltinObjType) Type 

func (b *BuiltinObjType) Type() ObjectType

type BuiltinObjectsMap 

type BuiltinObjectsMap map[BuiltinType]Object

func (BuiltinObjectsMap) Append 

func (m BuiltinObjectsMap) Append(obj ...Object) BuiltinObjectsMap

func (BuiltinObjectsMap) Build 

func (m BuiltinObjectsMap) Build() BuiltinObjectsMap

type BuiltinType 

type BuiltinType uint16

BuiltinType represents a builtin type 

const (
	BuiltinTypesBegin_ BuiltinType = iota
	// types
	BuiltinNil
	BuiltinFlag
	BuiltinBool
	BuiltinInt
	BuiltinUint
	BuiltinFloat
	BuiltinDecimal
	BuiltinChar
	BuiltinRawStr
	BuiltinStr
	BuiltinBytes
	BuiltinArray
	BuiltinDict
	BuiltinSyncDic
	BuiltinKeyValue
	BuiltinKeyValueArray
	BuiltinError
	BuiltinBuffer
	BuiltinIterator
	BuiltinZipIterator
	BuiltinTypesEnd_

	BuiltinFunctionsBegin_
	BuiltinBinaryOp
	BuiltinRepr
	BuiltinCast
	BuiltinAppend
	BuiltinDelete
	BuiltinCopy
	BuiltinDeepCopy
	BuiltinRepeat
	BuiltinContains
	BuiltinLen
	BuiltinSort
	BuiltinSortReverse
	BuiltinFilter
	BuiltinMap
	BuiltinEach
	BuiltinReduce
	BuiltinTypeName
	BuiltinChars
	BuiltinWrite
	BuiltinPrint
	BuiltinPrintf
	BuiltinPrintln
	BuiltinSprintf
	BuiltinGlobals
	BuiltinStdIO
	BuiltinWrap
	BuiltinStruct
	BuiltinNew
	BuiltinTypeOf
	BuiltinAddCallMethod
	BuiltinRawCaller
	BuiltinMakeArray
	BuiltinCap
	BuiltinIterate
	BuiltinKeys
	BuiltinValues
	BuiltinItems
	BuiltinCollect
	BuiltinEnumerate
	BuiltinIteratorInput
	BuiltinVMPushWriter
	BuiltinVMPopWriter
	BuiltinOBStart
	BuiltinOBEnd
	BuiltinFlush
	BuiltinUserData
	BuiltinNamedParamTypeCheck

	BuiltinIs
	BuiltinIsError
	BuiltinIsInt
	BuiltinIsUint
	BuiltinIsFloat
	BuiltinIsChar
	BuiltinIsBool
	BuiltinIsStr
	BuiltinIsRawStr
	BuiltinIsBytes
	BuiltinIsDict
	BuiltinIsSyncDict
	BuiltinIsArray
	BuiltinIsNil
	BuiltinIsFunction
	BuiltinIsCallable
	BuiltinIsIterable
	BuiltinIsIterator

	BuiltinFunctionsEnd_
	BuiltinErrorsBegin_
	// errors
	BuiltinWrongNumArgumentsError
	BuiltinInvalidOperatorError
	BuiltinIndexOutOfBoundsError
	BuiltinNotIterableError
	BuiltinNotIndexableError
	BuiltinNotIndexAssignableError
	BuiltinNotCallableError
	BuiltinNotImplementedError
	BuiltinZeroDivisionError
	BuiltinTypeError
	BuiltinErrorsEnd_

	BuiltinConstantsBegin_
	BuiltinDiscardWriter
	BuiltinConstantsEnd_

	BuiltinBinOperatorsBegin_
	BuiltinBinOpAdd
	BuiltinBinOpSub
	BuiltinBinOpMul
	BuiltinBinOpQuo
	BuiltinBinOpRem
	BuiltinBinOpAnd
	BuiltinBinOpOr
	BuiltinBinOpXor
	BuiltinBinOpShl
	BuiltinBinOpShr
	BuiltinBinOpAndNot
	BuiltinBinOpLAnd
	BuiltinBinOpEqual
	BuiltinBinOpNotEqual
	BuiltinBinOpLess
	BuiltinBinOpGreater
	BuiltinBinOpLessEq
	BuiltinBinOpGreaterEq
	BuiltinBinOperatorsEnd_
)

Builtins

func NewBuiltinType 

func NewBuiltinType() (t BuiltinType)

func (BuiltinType) String 

func (t BuiltinType) String() string

type Builtins 

type Builtins struct {
	Objects BuiltinObjectsMap
	Map     map[string]BuiltinType
	// contains filtered or unexported fields
}

func NewBuiltins 

func NewBuiltins() *Builtins

func (*Builtins) AppendMap 

func (s *Builtins) AppendMap(m map[string]Object)

func (*Builtins) ArgsInvoker 

func (s *Builtins) ArgsInvoker(t BuiltinType, c Call) func(arg ...Object) (Object, error)

func (*Builtins) Call 

func (s *Builtins) Call(t BuiltinType, c Call) (Object, error)

func (*Builtins) Caller 

func (s *Builtins) Caller(t BuiltinType) CallerObject

func (*Builtins) Get 

func (s *Builtins) Get(t BuiltinType) Object

func (*Builtins) Invoker 

func (s *Builtins) Invoker(t BuiltinType, c Call) func() (Object, error)

func (*Builtins) Set 

func (s *Builtins) Set(name string, obj Object) *Builtins

func (*Builtins) SetType 

func (s *Builtins) SetType(typ ObjectType) *Builtins

type Bytecode 

type Bytecode struct {
	FileSet    *parser.SourceFileSet
	Main       *CompiledFunction
	Constants  []Object
	NumModules int
}

Bytecode holds the compiled functions and constants.

func Compile 

func Compile(script []byte, opts CompileOptions) (*Bytecode, error)

Compile compiles given script to Bytecode.

func (*Bytecode) Fprint 

func (bc *Bytecode) Fprint(w io.Writer)

Fprint writes constants and instructions to given Writer in a human readable form.

func (*Bytecode) String 

func (bc *Bytecode) String() string

type Bytes 

type Bytes []byte

Bytes represents byte slice and implements Object interface.

func ToBytes 

func ToBytes(o Object) (v Bytes, ok bool)

ToBytes will try to convert an Object to Gad bytes value.

func (Bytes) BinaryOp 

func (o Bytes) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Bytes) Copy 

func (o Bytes) Copy() Object

Copy implements Copier interface.

func (Bytes) Equal 

func (o Bytes) Equal(right Object) bool

Equal implements Object interface.

func (Bytes) Format 

func (o Bytes) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Bytes) IndexGet 

func (o Bytes) IndexGet(_ *VM, index Object) (Object, error)

IndexGet represents string values and implements Object interface.

func (Bytes) IndexSet 

func (o Bytes) IndexSet(_ *VM, index, value Object) error

IndexSet implements Object interface.

func (Bytes) IsFalsy 

func (o Bytes) IsFalsy() bool

IsFalsy implements Object interface.

func (Bytes) Iterate 

func (o Bytes) Iterate(_ *VM, na *NamedArgs) Iterator

func (Bytes) Length 

func (o Bytes) Length() int

Length implements LengthGetter interface.

func (Bytes) ToString 

func (o Bytes) ToString() string

func (Bytes) Type 

func (o Bytes) Type() ObjectType

func (Bytes) WriteTo 

func (o Bytes) WriteTo(_ *VM, w io.Writer) (int64, error)

type BytesConverter 

type BytesConverter interface {
	Object
	ToBytes() (Bytes, error)
}

BytesConverter is to bytes converter

type Call 

type Call struct {
	VM        *VM
	Args      Args
	NamedArgs NamedArgs
	SafeArgs  bool
}

Call is a struct to pass arguments to CallEx and CallName methods. It provides VM for various purposes.

Call struct intentionally does not provide access to normal and variadic arguments directly. Using Length() and Get() methods is preferred. It is safe to create Call with a nil VM as long as VM is not required by the callee.

func NewCall 

func NewCall(vm *VM, opts ...CallOpt) Call

NewCall creates a new Call struct.

func (Call) InvokerOf 

func (c Call) InvokerOf(co CallerObject) *Invoker

type CallOpt 

type CallOpt func(c *Call)

type CallWrapper 

type CallWrapper struct {
	Caller    CallerObject
	Args      Args
	NamedArgs KeyValueArray
}

func NewCallWrapper 

func NewCallWrapper(caller CallerObject, args Args, namedArgs KeyValueArray) *CallWrapper

func (*CallWrapper) Call 

func (i *CallWrapper) Call(c Call) (Object, error)

func (CallWrapper) Equal 

func (CallWrapper) Equal(Object) bool

func (CallWrapper) IsFalsy 

func (CallWrapper) IsFalsy() bool

func (*CallWrapper) ToString 

func (i *CallWrapper) ToString() string

func (*CallWrapper) Type 

func (i *CallWrapper) Type() ObjectType

type CallableFunc 

type CallableFunc = func(Call) (ret Object, err error)

CallableFunc is a function signature for a callable function that accepts a Call struct.

type CallerMethod 

type CallerMethod struct {
	Default bool
	CallerObject
	Types []ObjectType
	// contains filtered or unexported fields
}

func (*CallerMethod) Caller 

func (o *CallerMethod) Caller() CallerObject

func (*CallerMethod) Remove 

func (o *CallerMethod) Remove()

func (*CallerMethod) String 

func (o *CallerMethod) String() string

type CallerObject 

type CallerObject interface {
	Object
	Call(c Call) (Object, error)
}

CallerObject is an interface for objects that can be called with Call method.

func ExprToTextOverride 

func ExprToTextOverride(name string, f func(vm *VM, w Writer, old func(w Writer, expr Object) (n Int, err error), expr Object) (n Int, err error)) CallerObject

func YieldCall 

func YieldCall(callerObject CallerObject, c *Call) CallerObject

type CallerObjectWithMethods 

type CallerObjectWithMethods struct {
	CallerObject
	Methods MethodArgType
	// contains filtered or unexported fields
}

func NewCallerObjectWithMethods 

func NewCallerObjectWithMethods(callerObject CallerObject) *CallerObjectWithMethods

func NewTypedFunction 

func NewTypedFunction(fn *Function, types MultipleObjectTypes) *CallerObjectWithMethods

func (*CallerObjectWithMethods) AddCallerMethod 

func (o *CallerObjectWithMethods) AddCallerMethod(vm *VM, types MultipleObjectTypes, handler CallerObject, override bool) error

func (*CallerObjectWithMethods) Call 

func (o *CallerObjectWithMethods) Call(c Call) (Object, error)

func (*CallerObjectWithMethods) Caller 

func (o *CallerObjectWithMethods) Caller() CallerObject

func (*CallerObjectWithMethods) CallerMethods 

func (o *CallerObjectWithMethods) CallerMethods() *MethodArgType

func (*CallerObjectWithMethods) CallerOf 

func (o *CallerObjectWithMethods) CallerOf(args Args) (CallerObject, bool)

func (*CallerObjectWithMethods) CallerOfTypes 

func (o *CallerObjectWithMethods) CallerOfTypes(types []ObjectType) (co CallerObject, validate bool)

func (*CallerObjectWithMethods) Equal 

func (o *CallerObjectWithMethods) Equal(right Object) bool

func (*CallerObjectWithMethods) GetMethod 

func (o *CallerObjectWithMethods) GetMethod(types []ObjectType) (co CallerObject)

func (*CallerObjectWithMethods) HasCallerMethods 

func (o *CallerObjectWithMethods) HasCallerMethods() bool

func (*CallerObjectWithMethods) MethodWalk 

func (o *CallerObjectWithMethods) MethodWalk(cb func(m *CallerMethod) any) (v any)

func (*CallerObjectWithMethods) MethodWalkSorted 

func (o *CallerObjectWithMethods) MethodWalkSorted(cb func(m *CallerMethod) any) (v any)

func (*CallerObjectWithMethods) RegisterDefaultWithTypes 

func (o *CallerObjectWithMethods) RegisterDefaultWithTypes(types MultipleObjectTypes) *CallerObjectWithMethods

func (*CallerObjectWithMethods) String 

func (o *CallerObjectWithMethods) String() string

func (*CallerObjectWithMethods) ToString 

func (o *CallerObjectWithMethods) ToString() string

type CallerObjectWithParamTypes 

type CallerObjectWithParamTypes interface {
	CallerObject
	ParamTypes(vm *VM) (MultipleObjectTypes, error)
}

CallerObjectWithParamTypes is an interface for objects that can be called with Call method with parameters with types.

type CanCallerObject 

type CanCallerObject interface {
	CallerObject
	// CanCall returns true if type can be called with Call() method.
	// VM returns an error if one tries to call a noncallable object.
	CanCall() bool
}

CanCallerObject is an interface for objects that can be objects implements this CallerObject interface. Note if CallerObject implements this interface, CanCall() is called for check if object is callable.

type CanCallerObjectMethodsEnabler 

type CanCallerObjectMethodsEnabler interface {
	CallerObject
	MethodsDisabled() bool
}

type CanCallerObjectTypesValidation 

type CanCallerObjectTypesValidation interface {
	CallerObject
	ValidateParamTypes(vm *VM, args Args) (err error)
	CanValidateParamTypes() bool
}

type CanFilterabler 

type CanFilterabler interface {
	CanFilter() bool
}

type CanIterabler 

type CanIterabler interface {
	Iterabler
	// CanIterate should return whether the Object can be Iterated.
	CanIterate() bool
}

type CanMapeabler 

type CanMapeabler interface {
	CanMap() bool
}

type CanReducer 

type CanReducer interface {
	CanReduce() bool
}

type CanToWriter 

type CanToWriter interface {
	CanWriteTo() bool
}

type Char 

type Char rune

Char represents a rune and implements Object interface.

func ToChar 

func ToChar(o Object) (v Char, ok bool)

ToChar will try to convert an Object to Gad char value.

func (Char) BinaryOp 

func (o Char) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Char) Equal 

func (o Char) Equal(right Object) bool

Equal implements Object interface.

func (Char) Format 

func (o Char) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Char) IsFalsy 

func (o Char) IsFalsy() bool

IsFalsy implements Object interface.

func (Char) ToBytes 

func (o Char) ToBytes() (Bytes, error)

func (Char) ToString 

func (o Char) ToString() string

func (Char) Type 

func (o Char) Type() ObjectType

type CollectableIterator 

type CollectableIterator interface {
	Iterator
	Collect(vm *VM) (Object, error)
}

type CompilableImporter 

type CompilableImporter interface {
	Importable
	CompileModule(compiler *Compiler, nd ast.Node, module *ModuleInfo, moduleMap *ModuleMap, src []byte) (bc *Bytecode, err error)
}

type CompileOptions 

type CompileOptions struct {
	CompilerOptions
	ParserOptions  parser.ParserOptions
	ScannerOptions parser.ScannerOptions
}

type CompiledFunction 

type CompiledFunction struct {
	Name string

	AllowMethods bool
	// number of local variabls including parameters NumLocals>=NumParams
	NumLocals    int
	Instructions []byte
	Free         []*ObjectPtr
	// SourceMap holds the index of instruction and token's position.
	SourceMap map[int]int

	Params Params

	NamedParams NamedParams

	// NamedParamsMap is a map of NamedParams with index
	// this value allow to perform named args validation.
	NamedParamsMap map[string]int
	// contains filtered or unexported fields
}

CompiledFunction holds the constants and instructions to pass VM.

func (*CompiledFunction) Call 

func (o *CompiledFunction) Call(c Call) (Object, error)

func (*CompiledFunction) CanValidateParamTypes 

func (o *CompiledFunction) CanValidateParamTypes() bool

func (CompiledFunction) ClearSourceFileInfo 

func (o CompiledFunction) ClearSourceFileInfo() *CompiledFunction

func (*CompiledFunction) Copy 

func (o *CompiledFunction) Copy() Object

Copy implements the Copier interface.

func (*CompiledFunction) Equal 

func (o *CompiledFunction) Equal(right Object) bool

Equal implements Object interface.

func (*CompiledFunction) Format 

func (o *CompiledFunction) Format(f fmt.State, verb rune)

func (*CompiledFunction) Fprint 

func (o *CompiledFunction) Fprint(w io.Writer)

Fprint writes constants and instructions to given Writer in a human readable form.

func (*CompiledFunction) IsFalsy 

func (*CompiledFunction) IsFalsy() bool

IsFalsy implements Object interface.

func (*CompiledFunction) ParamTypes 

func (o *CompiledFunction) ParamTypes(vm *VM) (types MultipleObjectTypes, err error)

func (*CompiledFunction) Repr 

func (o *CompiledFunction) Repr(vm *VM) (_ string, err error)

func (*CompiledFunction) SetNamedParams 

func (o *CompiledFunction) SetNamedParams(params ...*NamedParam)

func (*CompiledFunction) SourcePos 

func (o *CompiledFunction) SourcePos(ip int) source.Pos

SourcePos returns the source position of the instruction at ip.

func (*CompiledFunction) ToString 

func (o *CompiledFunction) ToString() string

func (*CompiledFunction) Type 

func (*CompiledFunction) Type() ObjectType

func (*CompiledFunction) ValidateParamTypes 

func (o *CompiledFunction) ValidateParamTypes(vm *VM, args Args) (err error)

type Compiler 

type Compiler struct {
	// contains filtered or unexported fields
}

Compiler compiles the AST into a bytecode.

func NewCompiler 

func NewCompiler(file *parser.SourceFile, opts CompilerOptions) *Compiler

NewCompiler creates a new Compiler object.

func (*Compiler) Bytecode 

func (c *Compiler) Bytecode() *Bytecode

Bytecode returns compiled Bytecode ready to run in VM.

func (*Compiler) Compile 

func (c *Compiler) Compile(nd ast.Node) error

Compile compiles parser.Node and builds Bytecode.

func (*Compiler) CompileModule 

func (c *Compiler) CompileModule(
	nd ast.Node,
	module *ModuleInfo,
	moduleMap *ModuleMap,
	src []byte,
	parserOptions *parser.ParserOptions,
	scannerOptions *parser.ScannerOptions,
) (bc *Bytecode, err error)

func (*Compiler) SetGlobalSymbolsIndex 

func (c *Compiler) SetGlobalSymbolsIndex()

SetGlobalSymbolsIndex sets index of a global symbol. This is only required when a global symbol is defined in SymbolTable and provided to compiler. Otherwise, caller needs to append the constant to Constants, set the symbol index and provide it to the Compiler. This should be called before Compiler.Compile call.

type CompilerError 

type CompilerError struct {
	FileSet *parser.SourceFileSet
	Node    ast.Node
	Err     error
}

CompilerError represents a compiler error.

func (*CompilerError) Error 

func (e *CompilerError) Error() string

func (*CompilerError) Unwrap 

func (e *CompilerError) Unwrap() error

type CompilerOptions 

type CompilerOptions struct {
	Context             context.Context
	ModuleMap           *ModuleMap
	Module              *ModuleInfo
	ModuleFile          string
	Constants           []Object
	SymbolTable         *SymbolTable
	Trace               io.Writer
	TraceParser         bool
	TraceCompiler       bool
	TraceOptimizer      bool
	OptimizerMaxCycle   int
	OptimizeConst       bool
	OptimizeExpr        bool
	MixedWriteFunction  node.Expr
	MixedExprToTextFunc node.Expr
	// contains filtered or unexported fields
}

CompilerOptions represents customizable options for Compile().

type Copier 

type Copier interface {
	Object
	Copy() Object
}

Copier wraps the Copy method to create a single copy of the object.

type Decimal 

type Decimal decimal.Decimal

Decimal represents a fixed-point decimal. It is immutable. number = value * 10 ^ exp

func DecimalFromFloat 

func DecimalFromFloat(v Float) Decimal

func DecimalFromInt 

func DecimalFromInt(v Int) Decimal

func DecimalFromString 

func DecimalFromString(v Str) (Decimal, error)

func DecimalFromUint 

func DecimalFromUint(v Uint) Decimal

func MustDecimalFromString 

func MustDecimalFromString(v Str) Decimal

func (Decimal) BinaryOp 

func (o Decimal) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Decimal) CallName 

func (o Decimal) CallName(name string, c Call) (_ Object, err error)

func (Decimal) Equal 

func (o Decimal) Equal(right Object) bool

Equal implements Object interface.

func (Decimal) Format 

func (o Decimal) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Decimal) Go 

func (o Decimal) Go() decimal.Decimal

func (*Decimal) GobDecode 

func (o *Decimal) GobDecode(bytes []byte) (err error)

func (Decimal) GobEncode 

func (o Decimal) GobEncode() ([]byte, error)

func (Decimal) IsFalsy 

func (o Decimal) IsFalsy() bool

IsFalsy implements Object interface.

func (Decimal) ToBytes 

func (o Decimal) ToBytes() (b Bytes, err error)

func (Decimal) ToString 

func (o Decimal) ToString() string

func (Decimal) Type 

func (o Decimal) Type() ObjectType

type DeepCopier 

type DeepCopier interface {
	Object
	DeepCopy(vm *VM) (Object, error)
}

DeepCopier wraps the Copy method to create a deep copy of the object.

type Dict 

type Dict map[string]Object

Dict represents map of objects and implements Object interface.

func AnyMapToMap 

func AnyMapToMap(src map[string]any) (m Dict, err error)

func ToMap 

func ToMap(o Object) (v Dict, ok bool)

ToMap will try to convert an Object to Gad map value.

func (Dict) BinaryOp 

func (o Dict) BinaryOp(vm *VM, tok token.Token, right Object) (_ Object, err error)

BinaryOp implements Object interface.

func (Dict) Copy 

func (o Dict) Copy() Object

Copy implements Copier interface.

func (Dict) DeepCopy 

func (o Dict) DeepCopy(vm *VM) (_ Object, err error)

DeepCopy implements DeepCopier interface.

func (Dict) Equal 

func (o Dict) Equal(right Object) bool

Equal implements Object interface.

func (Dict) Filter 

func (o Dict) Filter(f func(k string, v Object) bool) Dict

func (Dict) Format 

func (o Dict) Format(f fmt.State, verb rune)

func (Dict) IndexDelete 

func (o Dict) IndexDelete(_ *VM, key Object) error

IndexDelete tries to delete the string value of key from the map. IndexDelete implements IndexDeleter interface.

func (Dict) IndexGet 

func (o Dict) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (Dict) IndexSet 

func (o Dict) IndexSet(_ *VM, index, value Object) error

IndexSet implements Object interface.

func (Dict) IsFalsy 

func (o Dict) IsFalsy() bool

IsFalsy implements Object interface.

func (Dict) Items 

func (o Dict) Items(*VM) (KeyValueArray, error)

func (Dict) Iterate 

func (o Dict) Iterate(_ *VM, na *NamedArgs) Iterator

func (Dict) Keys 

func (o Dict) Keys() Array

func (Dict) Length 

func (o Dict) Length() int

Length implements LengthGetter interface.

func (Dict) Repr 

func (o Dict) Repr(vm *VM) (_ string, err error)

func (*Dict) Set 

func (o *Dict) Set(key string, value Object)

func (Dict) SortedKeys 

func (o Dict) SortedKeys() Array

func (Dict) ToInterface 

func (o Dict) ToInterface(vm *VM) any

func (Dict) ToInterfaceMap 

func (o Dict) ToInterfaceMap(vm *VM) (m map[string]any)

func (Dict) ToKeyValueArray 

func (o Dict) ToKeyValueArray() KeyValueArray

func (Dict) ToString 

func (o Dict) ToString() string

func (Dict) Type 

func (o Dict) Type() ObjectType

func (Dict) Values 

func (o Dict) Values() Array

type Error 

type Error struct {
	Name    string
	Message string
	Cause   error
}

Error represents Error Object and implements error and Object interfaces.

func IsError 

func IsError(a, b error) *Error

func NewArgumentTypeError 

func NewArgumentTypeError(pos, expectType, foundType string) *Error

NewArgumentTypeError creates a new Error from ErrType.

func NewArgumentTypeErrorT 

func NewArgumentTypeErrorT(pos string, foundType ObjectType, expectType ...ObjectType) *Error

NewArgumentTypeErrorT creates a new Error from ErrType.

func NewIndexTypeError 

func NewIndexTypeError(expectType, foundType string) *Error

NewIndexTypeError creates a new Error from ErrType.

func NewIndexTypeErrorT 

func NewIndexTypeErrorT(foundType ObjectType, expectType ...ObjectType) *Error

NewIndexTypeErrorT creates a new Error from ErrType.

func NewIndexValueTypeError 

func NewIndexValueTypeError(expectType, foundType string) *Error

NewIndexValueTypeError creates a new Error from ErrType.

func NewIndexValueTypeErrorT 

func NewIndexValueTypeErrorT(foundType ObjectType, expectType ...ObjectType) *Error

NewIndexValueTypeErrorT creates a new Error from ErrType.

func NewNamedArgumentTypeError 

func NewNamedArgumentTypeError(name, expectType, foundType string) *Error

NewNamedArgumentTypeError creates a new Error from ErrType.

func NewOperandTypeError 

func NewOperandTypeError(token, leftType, rightType string) *Error

NewOperandTypeError creates a new Error from ErrType.

func (*Error) Copy 

func (o *Error) Copy() Object

Copy implements Copier interface.

func (*Error) Equal 

func (o *Error) Equal(right Object) bool

Equal implements Object interface.

func (*Error) Error 

func (o *Error) Error() string

Error implements error interface.

func (*Error) IndexGet 

func (o *Error) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (*Error) IsFalsy 

func (o *Error) IsFalsy() bool

IsFalsy implements Object interface.

func (*Error) NewError 

func (o *Error) NewError(messages ...string) *Error

NewError creates a new Error and sets original Error as its cause which can be unwrapped.

func (*Error) ToString 

func (o *Error) ToString() string

func (*Error) Type 

func (o *Error) Type() ObjectType

func (*Error) Unwrap 

func (o *Error) Unwrap() error

type Eval 

type Eval struct {
	Locals []Object
	*RunOpts
	Opts         CompileOptions
	VM           *VM
	ModulesCache []Object
}

Eval compiles and runs scripts within same scope. If executed script's return statement has no value to return or return is omitted, it returns last value on stack. Warning: Eval is not safe to use concurrently.

func NewEval 

func NewEval(opts CompileOptions, runOpts ...*RunOpts) *Eval

NewEval returns new Eval object.

func (*Eval) Run 

func (r *Eval) Run(ctx context.Context, script []byte) (Object, *Bytecode, error)

Run compiles, runs given script and returns last value on stack.

type ExtImporter 

type ExtImporter interface {
	Importable
	// Get returns Extimporter instance which will import a module.
	Get(moduleName string) ExtImporter
	// Name returns the full name of the module e.g. absoule path of a file.
	// Import names are generally relative, this overwrites module name and used
	// as unique key for compiler module cache.
	Name() (string, error)
	// Fork returns an ExtImporter instance which will be used to import the
	// modules. Fork will get the result of Name() if it is not empty, otherwise
	// module name will be same with the Get call.
	Fork(moduleName string) ExtImporter
}

ExtImporter wraps methods for a module which will be impored dynamically like a file.

type Falser 

type Falser interface {
	// IsFalsy returns true if value is falsy otherwise false.
	IsFalsy() bool
}

Falser represents an Falser object.

type Filterabler 

type Filterabler interface {
	Object
	Filter(vm *VM, args Array, handler VMCaller) (Object, error)
}

type Flag 

type Flag bool

func ToFlag 

func ToFlag(o Object) (v Flag, ok bool)

ToFlag will try to convert an Object to Gad Flag value.

func (Flag) BinaryOp 

func (o Flag) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

func (Flag) Equal 

func (o Flag) Equal(right Object) bool

Equal implements Object interface.

func (Flag) IsFalsy 

func (o Flag) IsFalsy() bool

IsFalsy implements Object interface.

func (Flag) ToString 

func (o Flag) ToString() string

func (Flag) Type 

func (o Flag) Type() ObjectType

type Float 

type Float float64

Float represents float values and implements Object interface.

func ToFloat 

func ToFloat(o Object) (v Float, ok bool)

ToFloat will try to convert an Object to Gad float value.

func (Float) BinaryOp 

func (o Float) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Float) Equal 

func (o Float) Equal(right Object) bool

Equal implements Object interface.

func (Float) Format 

func (o Float) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Float) IsFalsy 

func (o Float) IsFalsy() bool

IsFalsy implements Object interface.

func (Float) ToString 

func (o Float) ToString() string

func (Float) Type 

func (o Float) Type() ObjectType

type Function 

type Function struct {
	ObjectImpl
	Name  string
	Value func(Call) (Object, error)
	ToStr func() string
}

Function represents a function object and implements Object interface.

func (*Function) Call 

func (o *Function) Call(call Call) (Object, error)

func (*Function) Copy 

func (o *Function) Copy() Object

Copy implements Copier interface.

func (*Function) Equal 

func (o *Function) Equal(right Object) bool

Equal implements Object interface.

func (*Function) IsFalsy 

func (*Function) IsFalsy() bool

IsFalsy implements Object interface.

func (*Function) ToString 

func (o *Function) ToString() string

func (*Function) Type 

func (*Function) Type() ObjectType

type FunctionHeader 

type FunctionHeader struct {
	Params      []Params
	NamedParams []Params
}

func (*FunctionHeader) String 

func (h *FunctionHeader) String() string

type FunctionHeaderParam 

type FunctionHeaderParam struct {
	Name  string
	Types []ObjectType
	Value string
}

func (*FunctionHeaderParam) String 

func (p *FunctionHeaderParam) String() string

type Importable 

type Importable interface {
	// Import should return either an Object or module source code ([]byte).
	Import(ctx context.Context, moduleName string) (data any, uri string, err error)
}

Importable interface represents importable module instance.

type IndexDelProxy 

type IndexDelProxy struct {
	Del func(vm *VM, key Object) error
}

func (*IndexDelProxy) IndexDelete 

func (p *IndexDelProxy) IndexDelete(vm *VM, key Object) error

type IndexDeleteProxy 

type IndexDeleteProxy struct {
	IndexGetProxy
	IndexSetProxy
	IndexDelProxy
}

func (*IndexDeleteProxy) BinaryOp 

func (o *IndexDeleteProxy) BinaryOp(vm *VM, tok token.Token, right Object) (_ Object, err error)

BinaryOp implements Object interface.

type IndexDeleter 

type IndexDeleter interface {
	Object
	IndexDelete(vm *VM, key Object) error
}

IndexDeleter wraps the IndexDelete method to delete an index of an object.

type IndexGetProxy 

type IndexGetProxy struct {
	GetIndex        func(vm *VM, index Object) (value Object, err error)
	ToStr           func() string
	It              func(vm *VM, na *NamedArgs) Iterator
	InterfaceValue  any
	CallNameHandler func(name string, c Call) (Object, error)
}

func StringIndexGetProxy 

func StringIndexGetProxy(handler func(vm *VM, index string) (value Object, err error)) *IndexGetProxy

func (*IndexGetProxy) CallName 

func (i *IndexGetProxy) CallName(name string, c Call) (Object, error)

func (*IndexGetProxy) CanIterate 

func (i *IndexGetProxy) CanIterate() bool

func (*IndexGetProxy) Equal 

func (i *IndexGetProxy) Equal(right Object) bool

func (IndexGetProxy) IndexGet 

func (i IndexGetProxy) IndexGet(vm *VM, index Object) (value Object, err error)

func (*IndexGetProxy) IsFalsy 

func (i *IndexGetProxy) IsFalsy() bool

func (*IndexGetProxy) Iterate 

func (i *IndexGetProxy) Iterate(vm *VM, na *NamedArgs) Iterator

func (*IndexGetProxy) ToInterface 

func (i *IndexGetProxy) ToInterface() any

func (*IndexGetProxy) ToString 

func (i *IndexGetProxy) ToString() string

func (*IndexGetProxy) Type 

func (i *IndexGetProxy) Type() ObjectType

type IndexGetSetter 

type IndexGetSetter interface {
	IndexGetter
	IndexSetter
}

type IndexGetter 

type IndexGetter interface {
	Object
	// IndexGet should take an index Object and return a result Object or an
	// error for indexable objects. Indexable is an object that can take an
	// index and return an object. Returned error stops VM execution if not
	// handled with an error handler and VM.Run returns the same error as
	// wrapped. If Object is not indexable, ErrNotIndexable should be returned
	// as error.
	IndexGet(vm *VM, index Object) (value Object, err error)
}

IndexGetter wraps the IndexGet method to get index value.

type IndexProxy 

type IndexProxy struct {
	IndexGetProxy
	IndexSetProxy
}

func (*IndexProxy) BinaryOp 

func (o *IndexProxy) BinaryOp(vm *VM, tok token.Token, right Object) (_ Object, err error)

BinaryOp implements Object interface.

type IndexSetProxy 

type IndexSetProxy struct {
	Set func(vm *VM, key, value Object) error
}

func (*IndexSetProxy) IndexSet 

func (s *IndexSetProxy) IndexSet(vm *VM, index, value Object) error

type IndexSetter 

type IndexSetter interface {
	Object
	// IndexSet should take an index Object and a value Object for index
	// assignable objects. Index assignable is an object that can take an index
	// and a value on the left-hand side of the assignment statement. If Object
	// is not index assignable, ErrNotIndexAssignable should be returned as
	// error. Returned error stops VM execution if not handled with an error
	// handler and VM.Run returns the same error as wrapped.
	IndexSet(vm *VM, index, value Object) error
}

IndexSetter wraps the IndexSet method to set index value.

type IndexableStructField 

type IndexableStructField struct {
	reflect.StructField
	Index []int
	Names []string
}

func FieldsOfReflectType 

func FieldsOfReflectType(ityp reflect.Type) (result []*IndexableStructField)

type Indexer 

type Indexer interface {
	IndexGetter
	IndexSetter
	IndexDeleter
}

type Int 

type Int int64

Int represents signed integer values and implements Object interface.

func ToInt 

func ToInt(o Object) (v Int, ok bool)

ToInt will try to convert an Object to Gad int value.

func (Int) BinaryOp 

func (o Int) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Int) Equal 

func (o Int) Equal(right Object) bool

Equal implements Object interface.

func (Int) Format 

func (o Int) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Int) IsFalsy 

func (o Int) IsFalsy() bool

IsFalsy implements Object interface.

func (Int) ToString 

func (o Int) ToString() string

func (Int) Type 

func (o Int) Type() ObjectType

type Invoker 

type Invoker struct {
	// contains filtered or unexported fields
}

Invoker invokes a given callee object (either a CompiledFunction or any other callable object) with the given arguments.

Invoker creates a new VM instance if the callee is a CompiledFunction, otherwise it runs the callee directly. Every Invoker call checks if the VM is aborted. If it is, it returns ErrVMAborted.

Invoker is not safe for concurrent use by multiple goroutines.

Acquire and Release methods are used to acquire and release a VM from the pool. So it is possible to reuse a VM instance for multiple CallWrapper calls. This is useful when you want to execute multiple functions in a single VM. For example, you can use Acquire and Release to execute multiple functions in a single VM instance. Note that you should call Release after Acquire, if you want to reuse the VM. If you don't want to use the pool, you can just call CallWrapper method. It is unsafe to hold a reference to the VM after Release is called. Using VM pool is about three times faster than creating a new VM for each CallWrapper call.

func NewInvoker 

func NewInvoker(vm *VM, callee Object) *Invoker

NewInvoker creates a new Invoker object.

func (*Invoker) Acquire 

func (inv *Invoker) Acquire()

Acquire acquires a VM from the pool.

func (*Invoker) Caller 

func (inv *Invoker) Caller(args Args, namedArgs *NamedArgs) (VMCaller, error)

Caller create new VM caller object.

func (*Invoker) Invoke 

func (inv *Invoker) Invoke(args Args, namedArgs *NamedArgs) (Object, error)

Invoke invokes the callee object with the given arguments.

func (*Invoker) Release 

func (inv *Invoker) Release()

Release releases the VM back to the pool if it was acquired from the pool.

func (*Invoker) ValidArgs 

func (inv *Invoker) ValidArgs(v bool) *Invoker

type ItemsGetter 

type ItemsGetter interface {
	Object
	Items(vm *VM) (arr KeyValueArray, err error)
}

ItemsGetter is an interface for returns pairs of fields or keys with same values.

type Iterabler 

type Iterabler interface {
	Object

	// Iterate should return an Iterator for the type.
	Iterate(vm *VM, na *NamedArgs) Iterator
}

type Iteration 

type Iteration struct {
	StartHandler StartIterationHandler
	NextHandler  NextIterationHandler
	// contains filtered or unexported fields
}

func NewIterator 

func NewIterator(start StartIterationHandler, next NextIterationHandler) *Iteration

func (*Iteration) Input 

func (it *Iteration) Input() Object

func (*Iteration) ItType 

func (it *Iteration) ItType() ObjectType

func (*Iteration) Next 

func (it *Iteration) Next(vm *VM, state *IteratorState) (err error)

func (*Iteration) Repr 

func (it *Iteration) Repr(vm *VM) (string, error)

func (*Iteration) SetInput 

func (it *Iteration) SetInput(input Object) *Iteration

func (*Iteration) SetItType 

func (it *Iteration) SetItType(itType ObjectType) *Iteration

func (*Iteration) Start 

func (it *Iteration) Start(vm *VM) (state *IteratorState, err error)

func (*Iteration) Type 

func (it *Iteration) Type() ObjectType

type Iterator 

type Iterator interface {
	Representer
	Type() ObjectType
	Input() Object
	Start(vm *VM) (state *IteratorState, err error)
	Next(vm *VM, state *IteratorState) (err error)
}

Iterator wraps the methods required to iterate Objects in VM.

func CollectModeIterator 

func CollectModeIterator(iterator Iterator, mode IteratorStateCollectMode) Iterator

func ToIterator 

func ToIterator(vm *VM, obj Object, na *NamedArgs) (l int, it Iterator, err error)

func ZipIterator 

func ZipIterator(its ...Iterator) Iterator

type IteratorState 

type IteratorState struct {
	Mode        IteratorStateMode
	CollectMode IteratorStateCollectMode
	Entry       KeyValue
	Value       Object
}

func (IteratorState) Get 

func (s IteratorState) Get() Object

type IteratorStateCollectMode 

type IteratorStateCollectMode uint8
const (
	IteratorStateCollectModeValues IteratorStateCollectMode = iota
	IteratorStateCollectModeKeys
	IteratorStateCollectModePair
)

func (IteratorStateCollectMode) String 

func (m IteratorStateCollectMode) String() string

type IteratorStateMode 

type IteratorStateMode uint8
const (
	IteratorStateModeEntry IteratorStateMode = iota
	IteratorStateModeContinue
	IteratorStateModeDone
)

type KeyValue 

type KeyValue struct {
	K, V Object
}

func (*KeyValue) BinaryOp 

func (o *KeyValue) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (KeyValue) Call 

func (KeyValue) Call(*NamedArgs, ...Object) (Object, error)

Call implements Object interface.

func (KeyValue) CanCall 

func (KeyValue) CanCall() bool

CanCall implements Object interface.

func (KeyValue) CanIterate 

func (KeyValue) CanIterate() bool

CanIterate implements Object interface.

func (KeyValue) Copy 

func (o KeyValue) Copy() Object

Copy implements Copier interface.

func (KeyValue) DeepCopy 

func (o KeyValue) DeepCopy(vm *VM) (_ Object, err error)

DeepCopy implements DeepCopier interface.

func (*KeyValue) Equal 

func (o *KeyValue) Equal(right Object) bool

Equal implements Object interface.

func (*KeyValue) IndexGet 

func (o *KeyValue) IndexGet(vm *VM, index Object) (value Object, err error)

func (*KeyValue) IndexSet 

func (o *KeyValue) IndexSet(vm *VM, index, value Object) error

func (*KeyValue) IsFalsy 

func (o *KeyValue) IsFalsy() bool

IsFalsy implements Object interface.

func (*KeyValue) IsLess 

func (o *KeyValue) IsLess(vm *VM, other *KeyValue) bool

func (*KeyValue) Repr 

func (o *KeyValue) Repr(vm *VM) (_ string, err error)

func (*KeyValue) ToString 

func (o *KeyValue) ToString() string

func (*KeyValue) Type 

func (o *KeyValue) Type() ObjectType

type KeyValueArray 

type KeyValueArray []*KeyValue

func ItemsOf 

func ItemsOf(vm *VM, o Object, na *NamedArgs) (values KeyValueArray, err error)

func (*KeyValueArray) Add 

func (o *KeyValueArray) Add(_ *VM, items ...Object) (err error)

func (KeyValueArray) AddItems 

func (o KeyValueArray) AddItems(arg ...*KeyValue) KeyValueArray

func (KeyValueArray) Append 

func (o KeyValueArray) Append(_ *VM, items ...Object) (this Object, err error)

func (KeyValueArray) AppendArray 

func (o KeyValueArray) AppendArray(arr ...Array) (KeyValueArray, error)

func (KeyValueArray) AppendMap 

func (o KeyValueArray) AppendMap(m Dict) KeyValueArray

func (KeyValueArray) AppendObject 

func (o KeyValueArray) AppendObject(obj Object) (KeyValueArray, error)

func (KeyValueArray) Array 

func (o KeyValueArray) Array() (ret Array)

func (KeyValueArray) BinaryOp 

func (o KeyValueArray) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (KeyValueArray) Call 

func (KeyValueArray) Call(*NamedArgs, ...Object) (Object, error)

Call implements Object interface.

func (KeyValueArray) CallName 

func (o KeyValueArray) CallName(name string, c Call) (_ Object, err error)

func (KeyValueArray) CanCall 

func (KeyValueArray) CanCall() bool

CanCall implements Object interface.

func (KeyValueArray) CanIterate 

func (KeyValueArray) CanIterate() bool

CanIterate implements Object interface.

func (KeyValueArray) Copy 

func (o KeyValueArray) Copy() Object

Copy implements Copier interface.

func (KeyValueArray) DeepCopy 

func (o KeyValueArray) DeepCopy(vm *VM) (r Object, err error)

DeepCopy implements DeepCopier interface.

func (KeyValueArray) Delete 

func (o KeyValueArray) Delete(keys ...Object) Object

func (KeyValueArray) Dict 

func (o KeyValueArray) Dict() (ret Dict)

func (KeyValueArray) Equal 

func (o KeyValueArray) Equal(right Object) bool

Equal implements Object interface.

func (KeyValueArray) Get 

func (o KeyValueArray) Get(keys ...Object) Object

func (KeyValueArray) IndexGet 

func (o KeyValueArray) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (KeyValueArray) IsFalsy 

func (o KeyValueArray) IsFalsy() bool

IsFalsy implements Object interface.

func (KeyValueArray) Items 

func (o KeyValueArray) Items(*VM) (KeyValueArray, error)

func (KeyValueArray) Iterate 

func (o KeyValueArray) Iterate(_ *VM, na *NamedArgs) Iterator

func (KeyValueArray) Keys 

func (o KeyValueArray) Keys() (arr Array)

func (KeyValueArray) Length 

func (o KeyValueArray) Length() int

Length implements LengthGetter interface.

func (KeyValueArray) Repr 

func (o KeyValueArray) Repr(vm *VM) (_ string, err error)

func (KeyValueArray) Sort 

func (o KeyValueArray) Sort(vm *VM, less CallerObject) (_ Object, err error)

func (KeyValueArray) SortReverse 

func (o KeyValueArray) SortReverse(vm *VM) (Object, error)

func (KeyValueArray) ToString 

func (o KeyValueArray) ToString() string

func (KeyValueArray) Type 

func (o KeyValueArray) Type() ObjectType

func (KeyValueArray) Values 

func (o KeyValueArray) Values() (arr Array)

type KeyValueArrays 

type KeyValueArrays []KeyValueArray

func (KeyValueArrays) Array 

func (o KeyValueArrays) Array() (ret Array)

func (KeyValueArrays) BinaryOp 

func (o KeyValueArrays) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (KeyValueArrays) Call 

func (KeyValueArrays) Call(*NamedArgs, ...Object) (Object, error)

Call implements Object interface.

func (KeyValueArrays) CallName 

func (o KeyValueArrays) CallName(name string, c Call) (Object, error)

func (KeyValueArrays) CanCall 

func (KeyValueArrays) CanCall() bool

CanCall implements Object interface.

func (KeyValueArrays) Copy 

func (o KeyValueArrays) Copy() Object

Copy implements Copier interface.

func (KeyValueArrays) DeepCopy 

func (o KeyValueArrays) DeepCopy(vm *VM) (_ Object, err error)

DeepCopy implements DeepCopier interface.

func (KeyValueArrays) Equal 

func (o KeyValueArrays) Equal(right Object) bool

Equal implements Object interface.

func (KeyValueArrays) IndexGet 

func (o KeyValueArrays) IndexGet(_ *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (KeyValueArrays) IsFalsy 

func (o KeyValueArrays) IsFalsy() bool

IsFalsy implements Object interface.

func (KeyValueArrays) Iterate 

func (o KeyValueArrays) Iterate(_ *VM, na *NamedArgs) Iterator

func (KeyValueArrays) Length 

func (o KeyValueArrays) Length() int

Length implements LengthGetter interface.

func (KeyValueArrays) Repr 

func (o KeyValueArrays) Repr(vm *VM) (_ string, err error)

func (KeyValueArrays) ToString 

func (o KeyValueArrays) ToString() string

func (KeyValueArrays) Type 

func (KeyValueArrays) Type() ObjectType

type KeysGetter 

type KeysGetter interface {
	Object
	Keys() (arr Array)
}

KeysGetter is an interface for returns keys or fields names.

type LengthGetter 

type LengthGetter interface {
	Object
	Length() int
}

LengthGetter wraps the Len method to get the number of elements of an object.

type LengthIterator 

type LengthIterator interface {
	Iterator
	Length() int
}

type LimitedIterator 

type LimitedIterator struct {
	Iterator
	Len int
}

func NewLimitedIteration 

func NewLimitedIteration(it Iterator, len int) *LimitedIterator

func (*LimitedIterator) Length 

func (it *LimitedIterator) Length() int

type Mapabler 

type Mapabler interface {
	Object
	Map(c Call, update bool, keyValue Array, handler VMCaller) (Object, error)
}

type MethodArgType 

type MethodArgType struct {
	Type    ObjectType
	Methods []*CallerMethod
	Next    Methods
}

func (*MethodArgType) Add 

func (at *MethodArgType) Add(types MultipleObjectTypes, m *CallerMethod, override bool) error

func (*MethodArgType) GetMethod 

func (at *MethodArgType) GetMethod(types []ObjectType) *CallerMethod

func (*MethodArgType) IsZero 

func (at *MethodArgType) IsZero() (ok bool)

func (*MethodArgType) Walk 

func (at *MethodArgType) Walk(cb func(m *CallerMethod) any) (v any)

func (*MethodArgType) WalkSorted 

func (at *MethodArgType) WalkSorted(cb func(m *CallerMethod) any) (v any)

type MethodCaller 

type MethodCaller interface {
	CallerObject
	AddCallerMethod(vm *VM, types MultipleObjectTypes, handler CallerObject, override bool) error
	CallerMethods() *MethodArgType
	CallerOf(args Args) (CallerObject, bool)
	CallerOfTypes(types []ObjectType) (co CallerObject, validate bool)
	GetMethod(types []ObjectType) (co CallerObject)
	HasCallerMethods() bool
	Caller() CallerObject
}

type MethodDefinition 

type MethodDefinition struct {
	Args    []ObjectType
	Handler CallerObject
}

type Methods 

type Methods map[ObjectType]*MethodArgType

func (Methods) Add 

func (args Methods) Add(pth, types ObjectTypes, cm *CallerMethod, override bool) (err error)

func (Methods) GetMethod 

func (args Methods) GetMethod(types []ObjectType) (cm *CallerMethod)

func (Methods) IsZero 

func (args Methods) IsZero() (ok bool)

func (Methods) Walk 

func (args Methods) Walk(cb func(m *CallerMethod) any) (rv any)

func (Methods) WalkSorted 

func (args Methods) WalkSorted(cb func(m *CallerMethod) any) (rv any)

type ModuleInfo 

type ModuleInfo struct {
	Name string
	File string
}

type ModuleMap 

type ModuleMap struct {
	// contains filtered or unexported fields
}

ModuleMap represents a set of named modules. Use NewModuleMap to create a new module map.

func NewModuleMap 

func NewModuleMap() *ModuleMap

NewModuleMap creates a new module map.

func (*ModuleMap) Add 

func (m *ModuleMap) Add(name string, module Importable) *ModuleMap

Add adds an importable module.

func (*ModuleMap) AddBuiltinModule 

func (m *ModuleMap) AddBuiltinModule(
	name string,
	attrs map[string]Object,
) *ModuleMap

AddBuiltinModule adds a builtin module.

func (*ModuleMap) AddSourceModule 

func (m *ModuleMap) AddSourceModule(name string, src []byte) *ModuleMap

AddSourceModule adds a source module.

func (*ModuleMap) Copy 

func (m *ModuleMap) Copy() *ModuleMap

Copy creates a copy of the module map.

func (*ModuleMap) Fork 

func (m *ModuleMap) Fork(moduleName string) *ModuleMap

Fork creates a new ModuleMap instance if ModuleMap has an ExtImporter to make ExtImporter preseve state.

func (*ModuleMap) Get 

func (m *ModuleMap) Get(name string) Importable

Get returns an import module identified by name. It returns nil if the name is not found.

func (*ModuleMap) Remove 

func (m *ModuleMap) Remove(name string)

Remove removes a named module.

func (*ModuleMap) SetExtImporter 

func (m *ModuleMap) SetExtImporter(im ExtImporter) *ModuleMap

SetExtImporter sets an ExtImporter to ModuleMap, which will be used to import modules dynamically.

type MultipleObjectTypes 

type MultipleObjectTypes []ObjectTypes

func (MultipleObjectTypes) Tree 

func (t MultipleObjectTypes) Tree() *ObjectTypeNode

type NameCallerObject 

type NameCallerObject interface {
	Object
	CallName(name string, c Call) (Object, error)
}

NameCallerObject is an interface for objects that can be called with CallName method to call a method of an object. Objects implementing this interface can reduce allocations by not creating a callable object for each method call.

type NamedArgVar 

type NamedArgVar struct {
	Name   string
	Value  Object
	ValueF func() Object
	*TypeAssertion
}

NamedArgVar is a struct to destructure named arguments from Call object.

type NamedArgs 

type NamedArgs struct {
	// contains filtered or unexported fields
}

func NewNamedArgs 

func NewNamedArgs(pairs ...KeyValueArray) *NamedArgs

func (*NamedArgs) Add 

func (o *NamedArgs) Add(obj Object) error

func (*NamedArgs) AllDict 

func (o *NamedArgs) AllDict() (ret Dict)

func (*NamedArgs) BinaryOp 

func (o *NamedArgs) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

func (*NamedArgs) Call 

func (o *NamedArgs) Call(c Call) (Object, error)

func (*NamedArgs) CallName 

func (o *NamedArgs) CallName(name string, c Call) (Object, error)

func (*NamedArgs) CheckNames 

func (o *NamedArgs) CheckNames(accept ...string) error

func (*NamedArgs) CheckNamesFromSet 

func (o *NamedArgs) CheckNamesFromSet(set map[string]int) error

func (*NamedArgs) Contains 

func (o *NamedArgs) Contains(key string) bool

func (*NamedArgs) Copy 

func (o *NamedArgs) Copy() Object

func (NamedArgs) DeepCopy 

func (o NamedArgs) DeepCopy(vm *VM) (_ Object, err error)

func (*NamedArgs) Dict 

func (o *NamedArgs) Dict() (ret Dict)

Dict return unread keys as Dict

func (*NamedArgs) Empty 

func (o *NamedArgs) Empty() bool

Empty return if is empty

func (*NamedArgs) Equal 

func (o *NamedArgs) Equal(right Object) bool

func (*NamedArgs) Get 

func (o *NamedArgs) Get(dst ...*NamedArgVar) (err error)

Get destructure. Return errors: - ArgumentTypeError if type check of arg is fail. - UnexpectedNamedArg if have unexpected arg.

func (*NamedArgs) GetOne 

func (o *NamedArgs) GetOne(dst ...*NamedArgVar) (err error)

GetOne get one value. Return errors: - ArgumentTypeError if type check of arg is fail.

func (*NamedArgs) GetPassedValue 

func (o *NamedArgs) GetPassedValue(key string) (val Object)

GetPassedValue Get passed value

func (*NamedArgs) GetValue 

func (o *NamedArgs) GetValue(key string) (val Object)

GetValue Must return value from key

func (*NamedArgs) GetValueOrNil 

func (o *NamedArgs) GetValueOrNil(key string) (val Object)

GetValueOrNil Must return value from key

func (*NamedArgs) GetVar 

func (o *NamedArgs) GetVar(dst ...*NamedArgVar) (args Dict, err error)

GetVar destructure and return others. Returns ArgumentTypeError if type check of arg is fail.

func (*NamedArgs) IndexGet 

func (o *NamedArgs) IndexGet(vm *VM, index Object) (value Object, err error)

func (*NamedArgs) IsFalsy 

func (o *NamedArgs) IsFalsy() bool

func (*NamedArgs) Iterate 

func (o *NamedArgs) Iterate(vm *VM, na *NamedArgs) Iterator

func (*NamedArgs) Join 

func (o *NamedArgs) Join() KeyValueArray

func (*NamedArgs) MustGetValue 

func (o *NamedArgs) MustGetValue(key string) (val Object)

MustGetValue Must return value from key but not takes as read

func (*NamedArgs) MustGetValueOrNil 

func (o *NamedArgs) MustGetValueOrNil(key string) (val Object)

MustGetValueOrNil Must return value from key nut not takes as read

func (*NamedArgs) Ready 

func (o *NamedArgs) Ready() (arr KeyValueArray)

func (*NamedArgs) ToString 

func (o *NamedArgs) ToString() string

func (*NamedArgs) Type 

func (o *NamedArgs) Type() ObjectType

func (*NamedArgs) UnReady 

func (o *NamedArgs) UnReady() *NamedArgs

func (*NamedArgs) UnreadPairs 

func (o *NamedArgs) UnreadPairs() (ret KeyValueArray)

func (*NamedArgs) Walk 

func (o *NamedArgs) Walk(cb func(na *KeyValue) error) (err error)

Walk pass over all pairs and call `cb` function. if `cb` function returns any error, stop iterator and return then.

type NamedParam 

type NamedParam struct {
	Name string
	// Value is a script of default value
	Value string
	Index int
	Type  []*SymbolInfo
}

func NewNamedParam 

func NewNamedParam(name string, value string) *NamedParam

type NamedParams 

type NamedParams struct {
	Params []*NamedParam
	// contains filtered or unexported fields
}

func NewNamedParams 

func NewNamedParams(params ...*NamedParam) (np *NamedParams)

func (*NamedParams) ByName 

func (n *NamedParams) ByName() map[string]int

func (*NamedParams) Len 

func (n *NamedParams) Len() int

func (*NamedParams) Names 

func (n *NamedParams) Names() (names []string)

func (*NamedParams) String 

func (n *NamedParams) String() string

func (*NamedParams) ToMap 

func (n *NamedParams) ToMap() (np map[string]*NamedParam)

func (*NamedParams) Variadic 

func (n *NamedParams) Variadic() bool

type NextIterationHandler 

type NextIterationHandler func(vm *VM, state *IteratorState) (err error)

type NilType 

type NilType struct {
	ObjectImpl
}

NilType represents the type of global Nil Object. One should use the NilType in type switches only.

func (*NilType) BinaryOp 

func (o *NilType) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (*NilType) Equal 

func (o *NilType) Equal(right Object) bool

Equal implements Object interface.

func (*NilType) Format 

func (o *NilType) Format(f fmt.State, verb rune)

func (*NilType) IsNil 

func (o *NilType) IsNil() bool

func (*NilType) ToString 

func (o *NilType) ToString() string

func (*NilType) Type 

func (o *NilType) Type() ObjectType

type Niler 

type Niler interface {
	Object
	IsNil() bool
}

type Obj 

type Obj struct {
	// contains filtered or unexported fields
}

Obj represents map of objects and implements Object interface.

func (*Obj) CallName 

func (o *Obj) CallName(name string, c Call) (_ Object, err error)

func (*Obj) CastTo 

func (o *Obj) CastTo(vm *VM, t ObjectType) (Object, error)

func (Obj) Copy 

func (o Obj) Copy() Object

Copy implements Copier interface.

func (Obj) DeepCopy 

func (o Obj) DeepCopy(vm *VM) (r Object, err error)

DeepCopy implements DeepCopier interface.

func (*Obj) Equal 

func (o *Obj) Equal(right Object) bool

Equal implements Object interface.

func (*Obj) Fields 

func (o *Obj) Fields() Dict

func (*Obj) IndexDelete 

func (o *Obj) IndexDelete(_ *VM, key Object) error

IndexDelete tries to delete the string value of key from the map. IndexDelete implements IndexDeleter interface.

func (*Obj) IndexGet 

func (o *Obj) IndexGet(vm *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (*Obj) IndexSet 

func (o *Obj) IndexSet(vm *VM, index, value Object) (err error)

IndexSet implements Object interface.

func (*Obj) IsFalsy 

func (o *Obj) IsFalsy() bool

IsFalsy implements Object interface.

func (*Obj) Items 

func (o *Obj) Items(vm *VM) (KeyValueArray, error)

func (*Obj) Keys 

func (o *Obj) Keys() Array

func (*Obj) Length 

func (o *Obj) Length() int

Length implements LengthGetter interface.

func (*Obj) ToString 

func (o *Obj) ToString() string

func (*Obj) Type 

func (o *Obj) Type() ObjectType

func (*Obj) Values 

func (o *Obj) Values() Array

type ObjType 

type ObjType struct {
	TypeName    string
	FieldsDict  Dict
	SettersDict Dict
	MethodsDict Dict
	GettersDict Dict
	Inherits    ObjectTypeArray
	// contains filtered or unexported fields
}

ObjType represents type objects and implements Object interface.

func NewObjType 

func NewObjType(typeName string) *ObjType

func (*ObjType) AddCallerMethod 

func (o *ObjType) AddCallerMethod(vm *VM, types MultipleObjectTypes, handler CallerObject, override bool) error

func (*ObjType) BinaryOp 

func (o *ObjType) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

func (*ObjType) Call 

func (o *ObjType) Call(c Call) (_ Object, err error)

func (*ObjType) CallName 

func (o *ObjType) CallName(name string, c Call) (ret Object, err error)

func (*ObjType) Caller 

func (o *ObjType) Caller() CallerObject

func (*ObjType) CallerMethods 

func (o *ObjType) CallerMethods() *MethodArgType

func (*ObjType) CallerOf 

func (o *ObjType) CallerOf(args Args) (co CallerObject, ok bool)

func (*ObjType) CallerOfTypes 

func (o *ObjType) CallerOfTypes(types []ObjectType) (co CallerObject, validate bool)

func (*ObjType) Equal 

func (o *ObjType) Equal(right Object) bool

Equal implements Object interface.

func (*ObjType) Fields 

func (o *ObjType) Fields() Dict

func (*ObjType) Format 

func (o *ObjType) Format(f fmt.State, verb rune)

func (*ObjType) GetMethod 

func (o *ObjType) GetMethod(types []ObjectType) (co CallerObject)

func (*ObjType) Getters 

func (o *ObjType) Getters() Dict

func (*ObjType) HasCallerMethods 

func (o *ObjType) HasCallerMethods() bool

func (*ObjType) IndexGet 

func (o *ObjType) IndexGet(_ *VM, index Object) (value Object, err error)

func (*ObjType) IsChildOf 

func (o *ObjType) IsChildOf(t ObjectType) bool

func (ObjType) IsFalsy 

func (ObjType) IsFalsy() bool

func (*ObjType) Methods 

func (o *ObjType) Methods() Dict

func (*ObjType) Name 

func (o *ObjType) Name() string

func (*ObjType) New 

func (o *ObjType) New(_ *VM, fields Dict) (Object, error)

func (*ObjType) NewCall 

func (o *ObjType) NewCall(c Call) (Object, error)

func (*ObjType) Setters 

func (o *ObjType) Setters() Dict

func (*ObjType) ToString 

func (o *ObjType) ToString() string

func (*ObjType) Type 

func (o *ObjType) Type() ObjectType

type Object 

type Object interface {
	Falser

	// OpDotName should return the name of the type.
	Type() ObjectType

	// ToString should return a string of the type's value.
	ToString() string

	// Equal checks equality of objects.
	Equal(right Object) bool
}

Object represents an object in the VM. 

var (
	// Nil represents nil value.
	Nil Object = &NilType{}
)

func BuiltinAppendFunc 

func BuiltinAppendFunc(c Call) (Object, error)

func BuiltinBinaryOpFunc 

func BuiltinBinaryOpFunc(c Call) (ret Object, err error)

func BuiltinBoolFunc 

func BuiltinBoolFunc(arg Object) Object

func BuiltinBufferFunc 

func BuiltinBufferFunc(c Call) (ret Object, err error)

func BuiltinBytesFunc 

func BuiltinBytesFunc(c Call) (Object, error)

func BuiltinCapFunc 

func BuiltinCapFunc(arg Object) Object

func BuiltinCastFunc 

func BuiltinCastFunc(c Call) (ret Object, err error)

func BuiltinCharFunc 

func BuiltinCharFunc(arg Object) (Object, error)

func BuiltinCharsFunc 

func BuiltinCharsFunc(arg Object) (ret Object, err error)

func BuiltinCollectFunc 

func BuiltinCollectFunc(c Call) (_ Object, err error)

func BuiltinContainsFunc 

func BuiltinContainsFunc(arg0, arg1 Object) (Object, error)

func BuiltinCopyFunc 

func BuiltinCopyFunc(c Call) (_ Object, err error)

func BuiltinDecimalFunc 

func BuiltinDecimalFunc(vm *VM, v Object) (Object, error)

func BuiltinDeepCopyFunc 

func BuiltinDeepCopyFunc(c Call) (_ Object, err error)

func BuiltinDeleteFunc 

func BuiltinDeleteFunc(c Call) (_ Object, err error)

func BuiltinDictFunc 

func BuiltinDictFunc(c Call) (ret Object, err error)

func BuiltinEachFunc 

func BuiltinEachFunc(c Call) (_ Object, err error)

func BuiltinEnumerateFunc 

func BuiltinEnumerateFunc(c Call) (_ Object, err error)

func BuiltinErrorFunc 

func BuiltinErrorFunc(arg Object) Object

func BuiltinFilterFunc 

func BuiltinFilterFunc(c Call) (_ Object, err error)

func BuiltinFlagFunc 

func BuiltinFlagFunc(arg Object) Object

func BuiltinFloatFunc 

func BuiltinFloatFunc(v float64) Object

func BuiltinFlushFunc 

func BuiltinFlushFunc(c Call) (Object, error)

func BuiltinGlobalsFunc 

func BuiltinGlobalsFunc(c Call) (Object, error)

func BuiltinIntFunc 

func BuiltinIntFunc(v int64) Object

func BuiltinIsArrayFunc 

func BuiltinIsArrayFunc(arg Object) Object

func BuiltinIsBoolFunc 

func BuiltinIsBoolFunc(arg Object) Object

func BuiltinIsBytesFunc 

func BuiltinIsBytesFunc(arg Object) Object

func BuiltinIsCallableFunc 

func BuiltinIsCallableFunc(arg Object) Object

func BuiltinIsCharFunc 

func BuiltinIsCharFunc(arg Object) Object

func BuiltinIsDictFunc 

func BuiltinIsDictFunc(arg Object) Object

func BuiltinIsErrorFunc 

func BuiltinIsErrorFunc(c Call) (ret Object, err error)

func BuiltinIsFloatFunc 

func BuiltinIsFloatFunc(arg Object) Object

func BuiltinIsFunc 

func BuiltinIsFunc(c Call) (ok Object, err error)

func BuiltinIsFunctionFunc 

func BuiltinIsFunctionFunc(arg Object) Object

func BuiltinIsIntFunc 

func BuiltinIsIntFunc(arg Object) Object

func BuiltinIsIterableFunc 

func BuiltinIsIterableFunc(vm *VM, arg Object) Object

func BuiltinIsIteratorFunc 

func BuiltinIsIteratorFunc(arg Object) Object

func BuiltinIsNilFunc 

func BuiltinIsNilFunc(arg Object) Object

func BuiltinIsRawStrFunc 

func BuiltinIsRawStrFunc(arg Object) Object

func BuiltinIsStrFunc 

func BuiltinIsStrFunc(arg Object) Object

func BuiltinIsSyncDictFunc 

func BuiltinIsSyncDictFunc(arg Object) Object

func BuiltinIsUintFunc 

func BuiltinIsUintFunc(arg Object) Object

func BuiltinItemsFunc 

func BuiltinItemsFunc(c Call) (_ Object, err error)

func BuiltinIterateFunc 

func BuiltinIterateFunc(c Call) (_ Object, err error)

func BuiltinIteratorInputFunc 

func BuiltinIteratorInputFunc(o Object) Object

func BuiltinKeyValueArrayFunc 

func BuiltinKeyValueArrayFunc(c Call) (_ Object, err error)

func BuiltinKeyValueFunc 

func BuiltinKeyValueFunc(c Call) (ret Object, err error)

func BuiltinKeysFunc 

func BuiltinKeysFunc(c Call) (_ Object, err error)

func BuiltinLenFunc 

func BuiltinLenFunc(arg Object) Object

func BuiltinMakeArrayFunc 

func BuiltinMakeArrayFunc(n int, arg Object) (Object, error)

func BuiltinMapFunc 

func BuiltinMapFunc(c Call) (_ Object, err error)

func BuiltinNamedParamTypeCheckFunc 

func BuiltinNamedParamTypeCheckFunc(c Call) (val Object, err error)

func BuiltinNewFunc 

func BuiltinNewFunc(c Call) (ret Object, err error)

func BuiltinOBEndFunc 

func BuiltinOBEndFunc(c Call) (ret Object, err error)

func BuiltinOBStartFunc 

func BuiltinOBStartFunc(c Call) (ret Object, err error)

func BuiltinPopWriterFunc 

func BuiltinPopWriterFunc(c Call) (ret Object, err error)

func BuiltinPrintFunc 

func BuiltinPrintFunc(c Call) (_ Object, err error)

func BuiltinPrintfFunc 

func BuiltinPrintfFunc(c Call) (_ Object, err error)

func BuiltinPrintlnFunc 

func BuiltinPrintlnFunc(c Call) (ret Object, err error)

func BuiltinPushWriterFunc 

func BuiltinPushWriterFunc(c Call) (ret Object, err error)

func BuiltinRawCallerFunc 

func BuiltinRawCallerFunc(c Call) (ret Object, err error)

func BuiltinRawStrFunc 

func BuiltinRawStrFunc(c Call) (ret Object, err error)

func BuiltinReduceFunc 

func BuiltinReduceFunc(c Call) (_ Object, err error)

func BuiltinRepeatFunc 

func BuiltinRepeatFunc(arg Object, count int) (ret Object, err error)

func BuiltinReprFunc 

func BuiltinReprFunc(c Call) (_ Object, err error)

func BuiltinSortFunc 

func BuiltinSortFunc(vm *VM, arg Object, less CallerObject) (ret Object, err error)

func BuiltinSortReverseFunc 

func BuiltinSortReverseFunc(vm *VM, arg Object, less CallerObject) (Object, error)

func BuiltinSprintfFunc 

func BuiltinSprintfFunc(c Call) (ret Object, err error)

func BuiltinStdIOFunc 

func BuiltinStdIOFunc(c Call) (ret Object, err error)

func BuiltinStringFunc 

func BuiltinStringFunc(c Call) (ret Object, err error)

func BuiltinStructFunc 

func BuiltinStructFunc(c Call) (ret Object, err error)

func BuiltinSyncDictFunc 

func BuiltinSyncDictFunc(c Call) (ret Object, err error)

func BuiltinTypeNameFunc 

func BuiltinTypeNameFunc(arg Object) Object

func BuiltinTypeOfFunc 

func BuiltinTypeOfFunc(c Call) (_ Object, err error)

func BuiltinUintFunc 

func BuiltinUintFunc(v uint64) Object

func BuiltinUserDataFunc 

func BuiltinUserDataFunc(c Call) (_ Object, err error)

func BuiltinValuesFunc 

func BuiltinValuesFunc(c Call) (_ Object, err error)

func BuiltinWrapFunc 

func BuiltinWrapFunc(c Call) (ret Object, err error)

func BuiltinWriteFunc 

func BuiltinWriteFunc(c Call) (ret Object, err error)

func Copy 

func Copy(o Object) Object

func DeepCopy 

func DeepCopy(vm *VM, o Object) (Object, error)

func DoCall 

func DoCall(co CallerObject, c Call) (ret Object, err error)

func IteratorObject 

func IteratorObject(it Iterator) Object

func MustCall 

func MustCall(callee Object, args ...Object) (Object, error)

func MustCallVargs 

func MustCallVargs(callee Object, args []Object, vargs ...Object) (Object, error)

func MustToObject 

func MustToObject(v any) (ret Object)

func ToObject 

func ToObject(v any) (ret Object, err error)

ToObject is analogous to ToObject but it will always convert signed integers to Int and unsigned integers to Uint. It is an alternative to ToObject. Note that, this function is subject to change in the future.

func TypedIteratorObject 

func TypedIteratorObject(typ ObjectType, it Iterator) Object

func Val 

func Val(v Object, e error) (ret Object, err error)

type ObjectConverters 

type ObjectConverters struct {
	ToGoHandlers     map[ObjectType]func(vm *VM, v Object) any
	ToObjectHandlers map[reflect.Type]func(vm *VM, v any) (Object, error)
}

func NewObjectConverters 

func NewObjectConverters() *ObjectConverters

func (*ObjectConverters) Register 

func (oc *ObjectConverters) Register(objType ObjectType, togo func(vm *VM, v Object) any, goType reflect.Type, toObject func(vm *VM, v any) (Object, error)) *ObjectConverters

func (*ObjectConverters) ToInterface 

func (oc *ObjectConverters) ToInterface(vm *VM, v Object) any

func (*ObjectConverters) ToObject 

func (oc *ObjectConverters) ToObject(vm *VM, v any) (Object, error)

type ObjectImpl 

type ObjectImpl struct{}

ObjectImpl is the basic Object implementation and it does not nothing, and helps to implement Object interface by embedding and overriding methods in custom implementations. Str and OpDotName must be implemented otherwise calling these methods causes panic.

func (ObjectImpl) Equal 

func (ObjectImpl) Equal(Object) bool

Equal implements Object interface.

func (ObjectImpl) IsFalsy 

func (ObjectImpl) IsFalsy() bool

IsFalsy implements Object interface.

func (ObjectImpl) ToString 

func (ObjectImpl) ToString() string

func (ObjectImpl) Type 

func (ObjectImpl) Type() ObjectType

type ObjectIterator 

type ObjectIterator interface {
	Object
	Iterator
	GetIterator() Iterator
}

type ObjectPtr 

type ObjectPtr struct {
	ObjectImpl
	Value *Object
}

ObjectPtr represents a pointer variable.

func (*ObjectPtr) BinaryOp 

func (o *ObjectPtr) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (*ObjectPtr) Call 

func (o *ObjectPtr) Call(c Call) (Object, error)

Call implements Object interface.

func (*ObjectPtr) CanCall 

func (o *ObjectPtr) CanCall() bool

CanCall implements Object interface.

func (*ObjectPtr) Copy 

func (o *ObjectPtr) Copy() Object

Copy implements Copier interface.

func (*ObjectPtr) DeepCopy 

func (o *ObjectPtr) DeepCopy(*VM) (Object, error)

DeepCopy implements DeepCopier interface.

func (*ObjectPtr) Equal 

func (o *ObjectPtr) Equal(x Object) bool

Equal implements Object interface.

func (*ObjectPtr) IsFalsy 

func (o *ObjectPtr) IsFalsy() bool

IsFalsy implements Object interface.

func (*ObjectPtr) ToString 

func (o *ObjectPtr) ToString() string

func (*ObjectPtr) Type 

func (o *ObjectPtr) Type() ObjectType

type ObjectRepresenter 

type ObjectRepresenter interface {
	Object
	Representer
}

type ObjectToWriter 

type ObjectToWriter interface {
	WriteTo(vm *VM, w io.Writer, obj Object) (handled bool, n int64, err error)
}

type ObjectToWriterFunc 

type ObjectToWriterFunc func(vm *VM, w io.Writer, obj Object) (handled bool, n int64, err error)
var DefaultObjectToWrite ObjectToWriterFunc = func(vm *VM, w io.Writer, obj Object) (handled bool, n int64, err error) {
	if ToWritable(obj) {
		n, err = obj.(ToWriter).WriteTo(vm, w)
	} else {
		var s Object
		if s, err = Val(vm.Builtins.Call(BuiltinRawStr, Call{VM: vm, Args: Args{Array{obj}}})); err != nil {
			return false, 0, err
		}
		var n32 int
		n32, err = w.Write([]byte(s.(RawStr)))
		n += int64(n32)
	}
	handled = true
	return
}

func (ObjectToWriterFunc) WriteTo 

func (f ObjectToWriterFunc) WriteTo(vm *VM, w io.Writer, obj Object) (handled bool, n int64, err error)

type ObjectToWriters 

type ObjectToWriters []ObjectToWriter

func (ObjectToWriters) Append 

func (o ObjectToWriters) Append(handlers ...ObjectToWriter) ObjectToWriters

func (ObjectToWriters) Prepend 

func (o ObjectToWriters) Prepend(handlers ...ObjectToWriter) ObjectToWriters

func (ObjectToWriters) WriteTo 

func (o ObjectToWriters) WriteTo(vm *VM, w io.Writer, obj Object) (handled bool, n int64, err error)

type ObjectType 

type ObjectType interface {
	Object
	CallerObject
	Name() string
	Getters() Dict
	Setters() Dict
	Methods() Dict
	Fields() Dict
	New(vm *VM, fields Dict) (Object, error)
	IsChildOf(t ObjectType) bool
}

func DetectTypeOf 

func DetectTypeOf(arg Object) ObjectType

func TypeOf 

func TypeOf(arg Object) ObjectType

func TypesOf 

func TypesOf(obj Object) (types []ObjectType)

type ObjectTypeArray 

type ObjectTypeArray []ObjectType

func (ObjectTypeArray) Array 

func (o ObjectTypeArray) Array() Array

func (ObjectTypeArray) Equal 

func (o ObjectTypeArray) Equal(right Object) bool

func (ObjectTypeArray) IsFalsy 

func (o ObjectTypeArray) IsFalsy() bool

func (ObjectTypeArray) ToString 

func (o ObjectTypeArray) ToString() string

func (ObjectTypeArray) Type 

func (o ObjectTypeArray) Type() ObjectType

type ObjectTypeNode 

type ObjectTypeNode struct {
	Type     ObjectType
	Children []*ObjectTypeNode
}

func (*ObjectTypeNode) Append 

func (n *ObjectTypeNode) Append(o MultipleObjectTypes)

func (*ObjectTypeNode) Walk 

func (n *ObjectTypeNode) Walk(cb func(types ObjectTypes) any) any

func (*ObjectTypeNode) WalkE 

func (n *ObjectTypeNode) WalkE(cb func(types ObjectTypes) any) error

type ObjectTypes 

type ObjectTypes []ObjectType

func (ObjectTypes) String 

func (t ObjectTypes) String() string

type Objector 

type Objector interface {
	Object
	Fields() Dict
}

type OpCallFlag 

type OpCallFlag byte
const (
	OpCallFlagVarArgs OpCallFlag = 1 << iota
	OpCallFlagNamedArgs
	OpCallFlagVarNamedArgs
)

func (OpCallFlag) Has 

func (f OpCallFlag) Has(other OpCallFlag) bool

type Opcode 

type Opcode byte

Opcode represents a single byte operation code. 

const (
	OpNoOp Opcode = iota
	OpConstant
	OpCall
	OpGetGlobal
	OpSetGlobal
	OpGetLocal
	OpSetLocal
	OpGetBuiltin
	OpBinaryOp
	OpUnary
	OpEqual
	OpNotEqual
	OpJump
	OpJumpFalsy
	OpAndJump
	OpOrJump
	OpMap
	OpArray
	OpSliceIndex
	OpGetIndex
	OpSetIndex
	OpNull
	OpStdIn
	OpStdOut
	OpStdErr
	OpDotName
	OpDotFile
	OpIsModule
	OpPop
	OpGetFree
	OpSetFree
	OpGetLocalPtr
	OpGetFreePtr
	OpClosure
	OpIterInit
	OpIterNext
	OpIterNextElse
	OpIterKey
	OpIterValue
	OpLoadModule
	OpStoreModule
	OpSetupTry
	OpSetupCatch
	OpSetupFinally
	OpThrow
	OpFinalizer
	OpReturn
	OpDefineLocal
	OpTrue
	OpFalse
	OpYes
	OpNo
	OpCallName
	OpJumpNil
	OpJumpNotNil
	OpKeyValueArray
	OpKeyValue
	OpCallee
	OpArgs
	OpNamedArgs
	OpTextWriter
	OpIsNil
	OpNotIsNil
)

List of opcodes

func (Opcode) String 

func (o Opcode) String() string

type OptimizerError 

type OptimizerError struct {
	FilePos parser.SourceFilePos
	Node    ast.Node
	Err     error
}

OptimizerError represents an optimizer error.

func (*OptimizerError) Error 

func (e *OptimizerError) Error() string

func (*OptimizerError) Unwrap 

func (e *OptimizerError) Unwrap() error

type ParamType 

type ParamType []*SymbolInfo

func (ParamType) Accept 

func (t ParamType) Accept(vm *VM, ot ObjectType) (ok bool, err error)

func (ParamType) String 

func (t ParamType) String() string

type Params 

type Params struct {
	Names []string
	Type  []ParamType
	Typed bool
	Len   int
	Var   bool
}

func (*Params) Min 

func (p *Params) Min() int

func (*Params) String 

func (p *Params) String() string

type PipedInvokeIterator 

type PipedInvokeIterator struct {
	// contains filtered or unexported fields
}

func NewPipedInvokeIterator 

func NewPipedInvokeIterator(it Iterator, args Array, startArgValueIndex int, caller VMCaller) (fe *PipedInvokeIterator)

func (*PipedInvokeIterator) Call 

func (f *PipedInvokeIterator) Call(state *IteratorState) (err error)

func (*PipedInvokeIterator) Handler 

func (f *PipedInvokeIterator) Handler() func(state *IteratorState) error

func (*PipedInvokeIterator) Input 

func (f *PipedInvokeIterator) Input() Object

func (*PipedInvokeIterator) Next 

func (f *PipedInvokeIterator) Next(vm *VM, state *IteratorState) (err error)

func (*PipedInvokeIterator) PostCall 

func (f *PipedInvokeIterator) PostCall() func(state *IteratorState, ret Object) error

func (*PipedInvokeIterator) PreCall 

func (f *PipedInvokeIterator) PreCall() func(k, v Object) (Object, error)

func (*PipedInvokeIterator) Repr 

func (f *PipedInvokeIterator) Repr(vm *VM) (s string, err error)

func (*PipedInvokeIterator) SetHandler 

func (f *PipedInvokeIterator) SetHandler(handler func(state *IteratorState) error) *PipedInvokeIterator

func (*PipedInvokeIterator) SetPostCall 

func (f *PipedInvokeIterator) SetPostCall(postCall func(state *IteratorState, ret Object) error) *PipedInvokeIterator

func (*PipedInvokeIterator) SetPreCall 

func (f *PipedInvokeIterator) SetPreCall(preCall func(k, v Object) (Object, error)) *PipedInvokeIterator

func (*PipedInvokeIterator) SetType 

func (f *PipedInvokeIterator) SetType(typ ObjectType) *PipedInvokeIterator

func (*PipedInvokeIterator) Start 

func (f *PipedInvokeIterator) Start(vm *VM) (state *IteratorState, err error)

func (*PipedInvokeIterator) Type 

func (f *PipedInvokeIterator) Type() ObjectType

type RangeIteration 

type RangeIteration struct {
	It     Object
	ItType ObjectType

	Len    int
	ReadTo func(e *KeyValue, i int) error
	// contains filtered or unexported fields
}

func NewRangeIteration 

func NewRangeIteration(typ ObjectType, o Object, len int, readTo func(e *KeyValue, i int) error) *RangeIteration

func SliceEntryIteration 

func SliceEntryIteration[T any](typ ObjectType, o Object, items []T, get func(v T) (key Object, val Object, err error)) *RangeIteration

func SliceIteration 

func SliceIteration[T any](typ ObjectType, o Object, items []T, get func(e *KeyValue, i Int, v T) error) *RangeIteration

func (*RangeIteration) Input 

func (it *RangeIteration) Input() Object

func (*RangeIteration) Length 

func (it *RangeIteration) Length() int

func (*RangeIteration) Next 

func (it *RangeIteration) Next(_ *VM, state *IteratorState) (err error)

func (*RangeIteration) ParseNamedArgs 

func (it *RangeIteration) ParseNamedArgs(na *NamedArgs) *RangeIteration

func (*RangeIteration) Repr 

func (it *RangeIteration) Repr(vm *VM) (string, error)

func (*RangeIteration) SetReversed 

func (it *RangeIteration) SetReversed(v bool) *RangeIteration

func (*RangeIteration) Start 

func (it *RangeIteration) Start(*VM) (state *IteratorState, err error)

func (*RangeIteration) Type 

func (it *RangeIteration) Type() ObjectType

type RawStr 

type RawStr string

RawStr represents safe string values and implements Object interface.

func ToRawStr 

func ToRawStr(vm *VM, o Object) (_ RawStr, err error)

func (RawStr) BinaryOp 

func (o RawStr) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (RawStr) Equal 

func (o RawStr) Equal(right Object) bool

func (RawStr) Format 

func (o RawStr) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (RawStr) IndexGet 

func (o RawStr) IndexGet(_ *VM, index Object) (Object, error)

func (RawStr) IsFalsy 

func (o RawStr) IsFalsy() bool

func (RawStr) Iterate 

func (o RawStr) Iterate(_ *VM, na *NamedArgs) Iterator

func (RawStr) Length 

func (o RawStr) Length() int

Length implements LengthGetter interface.

func (RawStr) Quoted 

func (o RawStr) Quoted() string

func (RawStr) Repr 

func (o RawStr) Repr(*VM) (string, error)

func (RawStr) ToString 

func (o RawStr) ToString() string

func (RawStr) Type 

func (o RawStr) Type() ObjectType

func (RawStr) WriteTo 

func (o RawStr) WriteTo(_ *VM, w io.Writer) (int64, error)

type ReadWriter 

type ReadWriter interface {
	Writer
	Reader
}

type Reader 

type Reader interface {
	Object
	io.Reader
	GoReader() io.Reader
}

func NewReader 

func NewReader(r io.Reader) Reader

type Reducer 

type Reducer interface {
	Object
	Reduce(vm *VM, initialValue Object, args Array, handler VMCaller) (Object, error)
}

type ReflectArray 

type ReflectArray struct {
	ReflectValue
}

func (*ReflectArray) Copy 

func (o *ReflectArray) Copy() (obj Object)

func (*ReflectArray) Format 

func (o *ReflectArray) Format(s fmt.State, verb rune)

func (*ReflectArray) Get 

func (o *ReflectArray) Get(vm *VM, i int) (value Object, err error)

func (*ReflectArray) IndexGet 

func (o *ReflectArray) IndexGet(vm *VM, index Object) (value Object, err error)

func (*ReflectArray) IndexSet 

func (o *ReflectArray) IndexSet(vm *VM, index, value Object) (err error)

func (*ReflectArray) IsFalsy 

func (o *ReflectArray) IsFalsy() bool

func (*ReflectArray) Iterate 

func (o *ReflectArray) Iterate(vm *VM, na *NamedArgs) Iterator

func (*ReflectArray) Length 

func (o *ReflectArray) Length() int

func (*ReflectArray) Repr 

func (o *ReflectArray) Repr(vm *VM) (_ string, err error)

func (*ReflectArray) ToString 

func (o *ReflectArray) ToString() string

type ReflectField 

type ReflectField struct {
	BaseType reflect.Type
	IsPtr    bool
	Struct   IndexableStructField
	Value    reflect.Value
}

func (*ReflectField) Equal 

func (r *ReflectField) Equal(right Object) bool

func (*ReflectField) IsFalsy 

func (r *ReflectField) IsFalsy() bool

func (*ReflectField) Set 

func (r *ReflectField) Set(f reflect.Value, v Object)

func (*ReflectField) String 

func (r *ReflectField) String() string

func (*ReflectField) ToString 

func (r *ReflectField) ToString() string

func (*ReflectField) Type 

func (r *ReflectField) Type() ObjectType

type ReflectFunc 

type ReflectFunc struct {
	ReflectValue
}

func (*ReflectFunc) Call 

func (r *ReflectFunc) Call(c Call) (_ Object, err error)

func (*ReflectFunc) ToString 

func (r *ReflectFunc) ToString() string

type ReflectMap 

type ReflectMap struct {
	ReflectValue
}

func (*ReflectMap) Copy 

func (o *ReflectMap) Copy() (obj Object)

func (*ReflectMap) Format 

func (o *ReflectMap) Format(s fmt.State, verb rune)

func (*ReflectMap) IndexDelete 

func (o *ReflectMap) IndexDelete(vm *VM, index Object) (err error)

func (*ReflectMap) IndexGet 

func (o *ReflectMap) IndexGet(vm *VM, index Object) (value Object, err error)

func (*ReflectMap) IndexSet 

func (o *ReflectMap) IndexSet(vm *VM, index, value Object) (err error)

func (*ReflectMap) IsFalsy 

func (o *ReflectMap) IsFalsy() bool

func (*ReflectMap) Iterate 

func (o *ReflectMap) Iterate(vm *VM, na *NamedArgs) Iterator

func (*ReflectMap) Length 

func (o *ReflectMap) Length() int

func (*ReflectMap) Repr 

func (o *ReflectMap) Repr(vm *VM) (_ string, err error)

func (*ReflectMap) ToString 

func (o *ReflectMap) ToString() string

type ReflectMethod 

type ReflectMethod struct {
	Method reflect.Method
	// contains filtered or unexported fields
}

func (*ReflectMethod) Equal 

func (r *ReflectMethod) Equal(right Object) bool

func (*ReflectMethod) IsFalsy 

func (r *ReflectMethod) IsFalsy() bool

func (*ReflectMethod) ToString 

func (r *ReflectMethod) ToString() string

func (*ReflectMethod) Type 

func (r *ReflectMethod) Type() ObjectType

type ReflectSlice 

type ReflectSlice struct {
	ReflectArray
}

func (*ReflectSlice) Append 

func (o *ReflectSlice) Append(vm *VM, items ...Object) (_ Object, err error)

func (*ReflectSlice) Copy 

func (o *ReflectSlice) Copy() (obj Object)

func (*ReflectSlice) Format 

func (o *ReflectSlice) Format(s fmt.State, verb rune)

func (*ReflectSlice) Insert 

func (o *ReflectSlice) Insert(vm *VM, at int, items ...Object) (_ Object, err error)

func (*ReflectSlice) Slice 

func (o *ReflectSlice) Slice(low, high int) Object

func (*ReflectSlice) ToString 

func (o *ReflectSlice) ToString() string

type ReflectStruct 

type ReflectStruct struct {
	ReflectValue

	Data      Dict
	Interface any
	// contains filtered or unexported fields
}

func (*ReflectStruct) CallName 

func (s *ReflectStruct) CallName(name string, c Call) (Object, error)

func (*ReflectStruct) Copy 

func (s *ReflectStruct) Copy() (obj Object)

func (*ReflectStruct) FalbackIndexHandler 

func (s *ReflectStruct) FalbackIndexHandler(handler func(vm *VM, s *ReflectStruct, name string) (handled bool, value any, err error)) *ReflectStruct

func (*ReflectStruct) Field 

func (s *ReflectStruct) Field(vm *VM, name string) (handled bool, value any, err error)

func (*ReflectStruct) FieldHandler 

func (s *ReflectStruct) FieldHandler(handler func(vm *VM, s *ReflectStruct, name string, v any) any) *ReflectStruct

func (*ReflectStruct) IndexGet 

func (s *ReflectStruct) IndexGet(vm *VM, index Object) (value Object, err error)

func (*ReflectStruct) IndexGetS 

func (s *ReflectStruct) IndexGetS(vm *VM, index string) (value Object, err error)

func (*ReflectStruct) IndexSet 

func (s *ReflectStruct) IndexSet(vm *VM, index, value Object) (err error)

func (*ReflectStruct) Iterate 

func (s *ReflectStruct) Iterate(vm *VM, na *NamedArgs) Iterator

func (*ReflectStruct) Repr 

func (s *ReflectStruct) Repr(vm *VM) (_ string, err error)

func (*ReflectStruct) SafeField 

func (s *ReflectStruct) SafeField(vm *VM, name string) (handled bool, value any, err error)

func (*ReflectStruct) SetField 

func (s *ReflectStruct) SetField(vm *VM, index string, value any) (handled bool, err error)

func (*ReflectStruct) SetFieldValue 

func (s *ReflectStruct) SetFieldValue(vm *VM, df *ReflectField, value any) (err error)

func (*ReflectStruct) SetValues 

func (s *ReflectStruct) SetValues(vm *VM, values Dict) (err error)

func (*ReflectStruct) ToString 

func (s *ReflectStruct) ToString() string

func (*ReflectStruct) UserData 

func (s *ReflectStruct) UserData() Indexer

type ReflectType 

type ReflectType struct {
	RType       reflect.Type
	RMethods    map[string]*ReflectMethod
	FieldsNames []string
	RFields     map[string]*ReflectField
	// contains filtered or unexported fields
}

func NewReflectType 

func NewReflectType(typ reflect.Type) (rt *ReflectType)

func (*ReflectType) Call 

func (r *ReflectType) Call(c Call) (obj Object, err error)

func (*ReflectType) Equal 

func (r *ReflectType) Equal(right Object) bool

func (*ReflectType) Fields 

func (r *ReflectType) Fields() (fields Dict)

func (*ReflectType) Fqn 

func (r *ReflectType) Fqn() string

func (*ReflectType) GetRMethods 

func (r *ReflectType) GetRMethods() map[string]*ReflectMethod

func (*ReflectType) Getters 

func (r *ReflectType) Getters() Dict

func (*ReflectType) IsChildOf 

func (r *ReflectType) IsChildOf(t ObjectType) bool

func (*ReflectType) IsFalsy 

func (r *ReflectType) IsFalsy() bool

func (*ReflectType) Methods 

func (r *ReflectType) Methods() (m Dict)

func (*ReflectType) Name 

func (r *ReflectType) Name() string

func (*ReflectType) New 

func (r *ReflectType) New(vm *VM, m Dict) (_ Object, err error)

func (*ReflectType) Setters 

func (r *ReflectType) Setters() Dict

func (*ReflectType) ToString 

func (r *ReflectType) ToString() string

func (*ReflectType) Type 

func (r *ReflectType) Type() ObjectType

type ReflectValue 

type ReflectValue struct {
	RType  *ReflectType
	RValue reflect.Value

	Options *ReflectValueOptions
	// contains filtered or unexported fields
}

func (*ReflectValue) CallName 

func (r *ReflectValue) CallName(name string, c Call) (Object, error)

func (*ReflectValue) CallNameOf 

func (r *ReflectValue) CallNameOf(this ReflectValuer, name string, c Call) (Object, error)

func (*ReflectValue) Copy 

func (r *ReflectValue) Copy() (obj Object)

func (*ReflectValue) Equal 

func (r *ReflectValue) Equal(right Object) bool

func (*ReflectValue) FalbackNameCallerHandler 

func (r *ReflectValue) FalbackNameCallerHandler(handler func(s ReflectValuer, name string, c Call) (handled bool, value Object, err error)) *ReflectValue

func (*ReflectValue) Format 

func (r *ReflectValue) Format(s fmt.State, verb rune)

func (*ReflectValue) GetRType 

func (r *ReflectValue) GetRType() *ReflectType

func (*ReflectValue) GetRValue 

func (r *ReflectValue) GetRValue() *ReflectValue

func (*ReflectValue) IsFalsy 

func (r *ReflectValue) IsFalsy() bool

func (*ReflectValue) IsNil 

func (r *ReflectValue) IsNil() bool

func (*ReflectValue) IsPtr 

func (r *ReflectValue) IsPtr() bool

func (*ReflectValue) PtrValue 

func (r *ReflectValue) PtrValue() reflect.Value

func (*ReflectValue) ToInterface 

func (r *ReflectValue) ToInterface() any

func (*ReflectValue) ToString 

func (r *ReflectValue) ToString() string

func (*ReflectValue) ToStringW 

func (r *ReflectValue) ToStringW(w io.Writer)

func (*ReflectValue) Type 

func (r *ReflectValue) Type() ObjectType

func (*ReflectValue) Value 

func (r *ReflectValue) Value() reflect.Value

type ReflectValueOptions 

type ReflectValueOptions struct {
	ToStr    func() string
	ItValuer func(value interface{}) (Object, error)
}

type ReflectValuer 

type ReflectValuer interface {
	Object
	Copier
	NameCallerObject
	ToIterfaceConverter
	Value() reflect.Value
	GetRValue() *ReflectValue
	GetRType() *ReflectType
	IsPtr() bool
	IsNil() bool
}

func MustNewReflectValue 

func MustNewReflectValue(v any, opts ...*ReflectValueOptions) ReflectValuer

func NewReflectValue 

func NewReflectValue(v any, opts ...*ReflectValueOptions) (ReflectValuer, error)

type Representer 

type Representer interface {
	Repr(vm *VM) (string, error)
}

type ReverseSorter 

type ReverseSorter interface {
	Object

	// SortReverse sorts object reversely. if `update`, sort self and return then, other else sorts a self copy object.
	SortReverse(vm *VM) (Object, error)
}

ReverseSorter is an interface for return reverse sorted values.

type RunOpts 

type RunOpts struct {
	Globals        IndexGetSetter
	Args           Args
	NamedArgs      *NamedArgs
	StdIn          io.Reader
	StdOut         io.Writer
	StdErr         io.Writer
	ObjectToWriter ObjectToWriter
}

type RuntimeError 

type RuntimeError struct {
	Err *Error

	Trace []source.Pos
	// contains filtered or unexported fields
}

RuntimeError represents a runtime error that wraps Error and includes trace information.

func (*RuntimeError) Copy 

func (o *RuntimeError) Copy() Object

Copy implements Copier interface.

func (*RuntimeError) Equal 

func (o *RuntimeError) Equal(right Object) bool

Equal implements Object interface.

func (*RuntimeError) Error 

func (o *RuntimeError) Error() string

Error implements error interface.

func (*RuntimeError) Format 

func (o *RuntimeError) Format(s fmt.State, verb rune)

Format implements fmt.Formater interface.

func (*RuntimeError) IndexGet 

func (o *RuntimeError) IndexGet(vm *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (*RuntimeError) IsFalsy 

func (o *RuntimeError) IsFalsy() bool

IsFalsy implements Object interface.

func (*RuntimeError) NewError 

func (o *RuntimeError) NewError(messages ...string) *RuntimeError

NewError creates a new Error and sets original Error as its cause which can be unwrapped.

func (*RuntimeError) StackTrace 

func (o *RuntimeError) StackTrace() StackTrace

StackTrace returns stack trace if set otherwise returns nil.

func (*RuntimeError) ToString 

func (o *RuntimeError) ToString() string

func (*RuntimeError) Type 

func (*RuntimeError) Type() ObjectType

func (*RuntimeError) Unwrap 

func (o *RuntimeError) Unwrap() error

type SetupOpts 

type SetupOpts struct {
	ObjectConverters *ObjectConverters
	Builtins         *Builtins
	ToRawStrHandler  func(vm *VM, s Str) RawStr
}

type SimpleOptimizer 

type SimpleOptimizer struct {
	// contains filtered or unexported fields
}

SimpleOptimizer optimizes given parsed file by evaluating constants and expressions. It is not safe to call methods concurrently.

func NewOptimizer 

func NewOptimizer(
	file *parser.File,
	base *SymbolTable,
	opts CompilerOptions,
) *SimpleOptimizer

NewOptimizer creates an Optimizer object.

func (*SimpleOptimizer) Optimize 

func (so *SimpleOptimizer) Optimize() error

Optimize optimizes ast tree by simple constant folding and evaluating simple expressions.

func (*SimpleOptimizer) Total 

func (so *SimpleOptimizer) Total() int

Total returns total number of evaluated constants and expressions.

type Slicer 

type Slicer interface {
	LengthGetter
	Slice(low, high int) Object
}

type Sorter 

type Sorter interface {
	Object

	// Sort sorts object. if `update`, sort self and return then, other else sorts a self copy object.
	Sort(vm *VM, less CallerObject) (Object, error)
}

Sorter is an interface for return sorted values.

type SourceModule 

type SourceModule struct {
	Src []byte
}

SourceModule is an importable module that's written in Gad.

func (*SourceModule) Import 

func (m *SourceModule) Import(_ context.Context, name string) (any, string, error)

Import returns a module source code.

type StackReader 

type StackReader struct {
	// contains filtered or unexported fields
}

func NewStackReader 

func NewStackReader(readers ...io.Reader) *StackReader

func (*StackReader) Equal 

func (s *StackReader) Equal(right Object) bool

func (*StackReader) GoReader 

func (s *StackReader) GoReader() io.Reader

func (*StackReader) IsFalsy 

func (s *StackReader) IsFalsy() bool

func (*StackReader) Pop 

func (s *StackReader) Pop()

func (*StackReader) Push 

func (s *StackReader) Push(r io.Reader)

func (*StackReader) Read 

func (s *StackReader) Read(p []byte) (n int, err error)

func (*StackReader) ToString 

func (s *StackReader) ToString() string

func (*StackReader) Type 

func (s *StackReader) Type() ObjectType

type StackTrace 

type StackTrace []parser.SourceFilePos

StackTrace is the stack of source file positions.

func (StackTrace) Format 

func (st StackTrace) Format(s fmt.State, verb rune)

Format formats the StackTrace to the fmt.Formatter interface.

type StackWriter 

type StackWriter struct {
	// contains filtered or unexported fields
}

func NewStackWriter 

func NewStackWriter(writers ...io.Writer) *StackWriter

func (*StackWriter) Current 

func (w *StackWriter) Current() Writer

func (*StackWriter) Equal 

func (w *StackWriter) Equal(right Object) bool

func (*StackWriter) Flush 

func (w *StackWriter) Flush() (n Int, err error)

func (*StackWriter) GoWriter 

func (w *StackWriter) GoWriter() io.Writer

func (*StackWriter) IsFalsy 

func (w *StackWriter) IsFalsy() bool

func (*StackWriter) Old 

func (w *StackWriter) Old() Writer

func (*StackWriter) Pop 

func (w *StackWriter) Pop() Writer

func (*StackWriter) Push 

func (w *StackWriter) Push(sw io.Writer)

func (*StackWriter) ToString 

func (w *StackWriter) ToString() string

func (*StackWriter) Type 

func (w *StackWriter) Type() ObjectType

func (*StackWriter) Write 

func (w *StackWriter) Write(p []byte) (n int, err error)

type StartIterationHandler 

type StartIterationHandler func(vm *VM) (state *IteratorState, err error)

type StateIteratorObject 

type StateIteratorObject struct {
	Iterator
	State         *IteratorState
	VM            *VM
	StartHandlers []func(s *StateIteratorObject)
}

func NewStateIteratorObject 

func NewStateIteratorObject(vm *VM, it Iterator) *StateIteratorObject

func ToStateIterator 

func ToStateIterator(vm *VM, obj Object, na *NamedArgs) (l int, sit *StateIteratorObject, err error)

func (*StateIteratorObject) AddStartHandler 

func (s *StateIteratorObject) AddStartHandler(f func(s *StateIteratorObject))

func (*StateIteratorObject) Equal 

func (s *StateIteratorObject) Equal(right Object) bool

func (*StateIteratorObject) GetIterator 

func (s *StateIteratorObject) GetIterator() Iterator

func (*StateIteratorObject) IndexGet 

func (s *StateIteratorObject) IndexGet(vm *VM, index Object) (value Object, err error)

func (*StateIteratorObject) Info 

func (s *StateIteratorObject) Info() Dict

func (*StateIteratorObject) IsFalsy 

func (s *StateIteratorObject) IsFalsy() bool

func (*StateIteratorObject) Key 

func (s *StateIteratorObject) Key() Object

func (*StateIteratorObject) Next 

func (s *StateIteratorObject) Next(vm *VM, state *IteratorState) (err error)

func (*StateIteratorObject) Read 

func (s *StateIteratorObject) Read() (_ bool, err error)

func (*StateIteratorObject) Repr 

func (s *StateIteratorObject) Repr(vm *VM) (r string, err error)

func (*StateIteratorObject) Start 

func (s *StateIteratorObject) Start(vm *VM) (state *IteratorState, err error)

func (*StateIteratorObject) ToString 

func (s *StateIteratorObject) ToString() string

func (*StateIteratorObject) Type 

func (s *StateIteratorObject) Type() ObjectType

func (*StateIteratorObject) Value 

func (s *StateIteratorObject) Value() Object

type Str 

type Str string

Str represents string values and implements Object interface.

func ToRepr 

func ToRepr(vm *VM, o Object) (_ Str, err error)

func ToReprTyped 

func ToReprTyped(vm *VM, typ ObjectType, o Object) (s Str, err error)

func ToStr 

func ToStr(vm *VM, o Object) (_ Str, err error)

func ToString 

func ToString(o Object) (v Str, ok bool)

ToString will try to convert an Object to Gad string value.

func (Str) BinaryOp 

func (o Str) BinaryOp(_ *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Str) Equal 

func (o Str) Equal(right Object) bool

Equal implements Object interface.

func (Str) Format 

func (o Str) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Str) IndexGet 

func (o Str) IndexGet(_ *VM, index Object) (Object, error)

IndexGet represents string values and implements Object interface.

func (Str) IsFalsy 

func (o Str) IsFalsy() bool

IsFalsy implements Object interface.

func (Str) Iterate 

func (o Str) Iterate(_ *VM, na *NamedArgs) Iterator

func (Str) Length 

func (o Str) Length() int

Length implements LengthGetter interface.

func (Str) Quoted 

func (o Str) Quoted() string

func (Str) Repr 

func (o Str) Repr(*VM) (string, error)

func (Str) ToString 

func (o Str) ToString() string

func (Str) Type 

func (o Str) Type() ObjectType

type Symbol 

type Symbol struct {
	SymbolInfo
	Assigned bool
	Constant bool
	Original *Symbol
}

Symbol represents a symbol in the symbol table.

func (*Symbol) String 

func (s *Symbol) String() string

type SymbolInfo 

type SymbolInfo struct {
	Name  string
	Index int
	Scope SymbolScope
}

func (*SymbolInfo) Equal 

func (s *SymbolInfo) Equal(right Object) bool

func (*SymbolInfo) IsFalsy 

func (s *SymbolInfo) IsFalsy() bool

func (*SymbolInfo) ToString 

func (s *SymbolInfo) ToString() string

func (*SymbolInfo) Type 

func (s *SymbolInfo) Type() ObjectType

type SymbolScope 

type SymbolScope uint8

SymbolScope represents a symbol scope. 

const (
	ScopeGlobal SymbolScope = iota + 1
	ScopeLocal
	ScopeBuiltin
	ScopeFree
)

List of symbol scopes

func (SymbolScope) String 

func (s SymbolScope) String() string

type SymbolTable 

type SymbolTable struct {
	// contains filtered or unexported fields
}

SymbolTable represents a symbol table.

func NewSymbolTable 

func NewSymbolTable(builtins *Builtins) *SymbolTable

NewSymbolTable creates new symbol table object.

func (*SymbolTable) Builtins 

func (st *SymbolTable) Builtins() *Builtins

func (*SymbolTable) DefineGlobal 

func (st *SymbolTable) DefineGlobal(name string) (*Symbol, error)

DefineGlobal adds a new symbol with ScopeGlobal in the current scope.

func (*SymbolTable) DefineLocal 

func (st *SymbolTable) DefineLocal(name string) (*Symbol, bool)

DefineLocal adds a new symbol with ScopeLocal in the current scope.

func (*SymbolTable) DisableBuiltin 

func (st *SymbolTable) DisableBuiltin(names ...string) *SymbolTable

DisableBuiltin disables given builtin name(s). Compiler returns `Compile Error: unresolved reference "builtin name"` if a disabled builtin is used.

func (*SymbolTable) DisabledBuiltins 

func (st *SymbolTable) DisabledBuiltins() []string

DisabledBuiltins returns disabled builtin names.

func (*SymbolTable) EnableParams 

func (st *SymbolTable) EnableParams(v bool) *SymbolTable

EnableParams enables or disables definition of parameters.

func (*SymbolTable) Fork 

func (st *SymbolTable) Fork(block bool) *SymbolTable

Fork creates a new symbol table for a new scope.

func (*SymbolTable) FreeSymbols 

func (st *SymbolTable) FreeSymbols() []*Symbol

FreeSymbols returns registered free symbols for the scope.

func (*SymbolTable) InBlock 

func (st *SymbolTable) InBlock() bool

InBlock returns true if symbol table belongs to a block.

func (*SymbolTable) MaxSymbols 

func (st *SymbolTable) MaxSymbols() int

MaxSymbols returns the total number of symbols defined in the scope.

func (*SymbolTable) NamedParams 

func (st *SymbolTable) NamedParams() NamedParams

NamedParams returns named parameters for the scope.

func (*SymbolTable) NextIndex 

func (st *SymbolTable) NextIndex() int

NextIndex returns the next symbol index.

func (*SymbolTable) Params 

func (st *SymbolTable) Params() Params

Params returns parameters for the scope.

func (*SymbolTable) Parent 

func (st *SymbolTable) Parent(skipBlock bool) *SymbolTable

Parent returns the outer scope of the current symbol table.

func (*SymbolTable) Resolve 

func (st *SymbolTable) Resolve(name string) (symbol *Symbol, ok bool)

Resolve resolves a symbol with a given name.

func (*SymbolTable) SetNamedParams 

func (st *SymbolTable) SetNamedParams(params ...*NamedParam) (err error)

SetNamedParams sets parameters defined in the scope. This can be called only once.

func (*SymbolTable) SetParams 

func (st *SymbolTable) SetParams(varParams bool, params []string, types []ParamType) (err error)

SetParams sets parameters defined in the scope. This can be called only once.

func (*SymbolTable) ShadowedBuiltins 

func (st *SymbolTable) ShadowedBuiltins() []string

ShadowedBuiltins returns all shadowed builtin names including parent symbol tables'. Returing slice may contain duplicate names.

func (*SymbolTable) Symbols 

func (st *SymbolTable) Symbols() []*Symbol

Symbols returns registered symbols for the scope.

type SyncDict 

type SyncDict struct {
	Value Dict
	// contains filtered or unexported fields
}

SyncDict represents map of objects and implements Object interface.

func ToSyncMap 

func ToSyncMap(o Object) (v *SyncDict, ok bool)

ToSyncMap will try to convert an Object to Gad syncMap value.

func (*SyncDict) BinaryOp 

func (o *SyncDict) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (*SyncDict) Copy 

func (o *SyncDict) Copy() Object

Copy implements Copier interface.

func (*SyncDict) DeepCopy 

func (o *SyncDict) DeepCopy(vm *VM) (v Object, err error)

DeepCopy implements DeepCopier interface.

func (*SyncDict) Equal 

func (o *SyncDict) Equal(right Object) bool

Equal implements Object interface.

func (*SyncDict) Format 

func (o *SyncDict) Format(f fmt.State, verb rune)

func (*SyncDict) Get 

func (o *SyncDict) Get(index string) (value Object, exists bool)

Get returns Object in map if exists.

func (*SyncDict) IndexDelete 

func (o *SyncDict) IndexDelete(vm *VM, key Object) error

IndexDelete tries to delete the string value of key from the map.

func (*SyncDict) IndexGet 

func (o *SyncDict) IndexGet(vm *VM, index Object) (Object, error)

IndexGet implements Object interface.

func (*SyncDict) IndexSet 

func (o *SyncDict) IndexSet(vm *VM, index, value Object) error

IndexSet implements Object interface.

func (*SyncDict) IsFalsy 

func (o *SyncDict) IsFalsy() bool

IsFalsy implements Object interface.

func (*SyncDict) Items 

func (o *SyncDict) Items(vm *VM) (KeyValueArray, error)

func (*SyncDict) Iterate 

func (o *SyncDict) Iterate(_ *VM, na *NamedArgs) Iterator

func (*SyncDict) Keys 

func (o *SyncDict) Keys() Array

func (*SyncDict) Length 

func (o *SyncDict) Length() int

Length returns the number of items in the dict.

func (*SyncDict) Lock 

func (o *SyncDict) Lock()

Lock locks the underlying mutex for writing.

func (*SyncDict) RLock 

func (o *SyncDict) RLock()

RLock locks the underlying mutex for reading.

func (*SyncDict) RUnlock 

func (o *SyncDict) RUnlock()

RUnlock unlocks the underlying mutex for reading.

func (*SyncDict) ToString 

func (o *SyncDict) ToString() string

func (*SyncDict) Type 

func (o *SyncDict) Type() ObjectType

func (*SyncDict) Unlock 

func (o *SyncDict) Unlock()

Unlock unlocks the underlying mutex for writing.

func (*SyncDict) Values 

func (o *SyncDict) Values() Array

type SyncIterator 

type SyncIterator struct {
	*Iteration
	// contains filtered or unexported fields
}

SyncIterator represents an iterator for the SyncDict.

func (*SyncIterator) NextIteration 

func (it *SyncIterator) NextIteration(vm *VM, state *IteratorState) (err error)

func (*SyncIterator) StartIteration 

func (it *SyncIterator) StartIteration(vm *VM) (state *IteratorState, err error)

type ToArrayAppenderObject 

type ToArrayAppenderObject interface {
	Object
	AppendToArray(arr *Array)
}

type ToIterfaceConverter 

type ToIterfaceConverter interface {
	ToInterface() any
}

type ToIterfaceVMConverter 

type ToIterfaceVMConverter interface {
	ToInterface(*VM) any
}

type ToWriter 

type ToWriter interface {
	Object
	WriteTo(vm *VM, w io.Writer) (n int64, err error)
}

type Type 

type Type struct {
	TypeName string
	Parent   ObjectType

	Constructor CallerObject
	// contains filtered or unexported fields
}

func (*Type) AddCallerMethod 

func (t *Type) AddCallerMethod(vm *VM, types MultipleObjectTypes, handler CallerObject, override bool) error

func (*Type) Call 

func (t *Type) Call(c Call) (_ Object, err error)

func (*Type) Caller 

func (t *Type) Caller() CallerObject

func (*Type) CallerMethods 

func (t *Type) CallerMethods() *MethodArgType

func (*Type) CallerOf 

func (t *Type) CallerOf(args Args) (co CallerObject, ok bool)

func (*Type) CallerOfTypes 

func (t *Type) CallerOfTypes(types []ObjectType) (co CallerObject, validate bool)

func (*Type) Equal 

func (t *Type) Equal(right Object) bool

func (Type) Fields 

func (Type) Fields() Dict

func (*Type) GetMethod 

func (t *Type) GetMethod(types []ObjectType) (co CallerObject)

func (Type) Getters 

func (Type) Getters() Dict

func (*Type) HasCallerMethods 

func (t *Type) HasCallerMethods() bool

func (*Type) IsChildOf 

func (t *Type) IsChildOf(ot ObjectType) bool

func (*Type) IsFalsy 

func (t *Type) IsFalsy() bool

func (Type) Methods 

func (Type) Methods() Dict

func (Type) Name 

func (t Type) Name() string

func (Type) New 

func (Type) New(*VM, Dict) (Object, error)

func (Type) Setters 

func (Type) Setters() Dict

func (*Type) ToString 

func (t *Type) ToString() string

func (*Type) Type 

func (t *Type) Type() ObjectType

func (*Type) WithConstructor 

func (t *Type) WithConstructor(handler CallerObject) *Type

func (*Type) WithMethod 

func (t *Type) WithMethod(types MultipleObjectTypes, handler CallerObject, override bool) *Type

type TypeAssertion 

type TypeAssertion struct {
	Types    []ObjectType
	Handlers TypeAssertionHandlers
}

func NewTypeAssertion 

func NewTypeAssertion(handlers TypeAssertionHandlers, types ...ObjectType) *TypeAssertion

func TypeAssertionFromTypes 

func TypeAssertionFromTypes(types ...ObjectType) *TypeAssertion

func (*TypeAssertion) Accept 

func (a *TypeAssertion) Accept(value Object) (expectedNames string)

func (*TypeAssertion) AcceptHandler 

func (a *TypeAssertion) AcceptHandler(name string, handler TypeAssertionHandler) *TypeAssertion

func (*TypeAssertion) AcceptType 

func (a *TypeAssertion) AcceptType(value ObjectType) (expectedNames string)

type TypeAssertionHandler 

type TypeAssertionHandler func(v Object) bool

type TypeAssertionHandlers 

type TypeAssertionHandlers map[string]TypeAssertionHandler

type Uint 

type Uint uint64

Uint represents unsigned integer values and implements Object interface.

func ToUint 

func ToUint(o Object) (v Uint, ok bool)

ToUint will try to convert an Object to Gad uint value.

func (Uint) BinaryOp 

func (o Uint) BinaryOp(vm *VM, tok token.Token, right Object) (Object, error)

BinaryOp implements Object interface.

func (Uint) Equal 

func (o Uint) Equal(right Object) bool

Equal implements Object interface.

func (Uint) Format 

func (o Uint) Format(s fmt.State, verb rune)

Format implements fmt.Formatter interface.

func (Uint) IsFalsy 

func (o Uint) IsFalsy() bool

IsFalsy implements Object interface.

func (Uint) ToString 

func (o Uint) ToString() string

func (Uint) Type 

func (o Uint) Type() ObjectType

type UserDataStorage 

type UserDataStorage interface {
	Object
	UserData() Indexer
}

type VM 

type VM struct {
	StdOut, StdErr *StackWriter
	StdIn          *StackReader
	ObjectToWriter ObjectToWriter

	*SetupOpts
	// contains filtered or unexported fields
}

VM executes the instructions in Bytecode.

func NewVM 

func NewVM(bc *Bytecode) *VM

NewVM creates a VM object.

func (*VM) Abort 

func (vm *VM) Abort()

Abort aborts the VM execution. It is safe to call this method from another goroutine.

func (*VM) Aborted 

func (vm *VM) Aborted() bool

Aborted reports whether VM is aborted. It is safe to call this method from another goroutine.

func (*VM) AddCallerMethod 

func (vm *VM) AddCallerMethod(co CallerObject, types MultipleObjectTypes, caller CallerObject) error

func (*VM) AddCallerMethodOverride 

func (vm *VM) AddCallerMethodOverride(co CallerObject, types MultipleObjectTypes, override bool, caller CallerObject) error

func (*VM) Clear 

func (vm *VM) Clear() *VM

Clear clears stack by setting nil to stack indexes and removes modules cache.

func (*VM) GetGlobals 

func (vm *VM) GetGlobals() Object

GetGlobals returns global variables.

func (*VM) GetLocals 

func (vm *VM) GetLocals(locals []Object) []Object

GetLocals returns variables from stack up to the NumLocals of given Bytecode. This must be called after Run() before Clear().

func (*VM) GetSymbolValue 

func (vm *VM) GetSymbolValue(symbol *SymbolInfo) (value Object, err error)

func (*VM) Init 

func (vm *VM) Init() *VM

func (*VM) Read 

func (vm *VM) Read(b []byte) (int, error)

func (*VM) Run 

func (vm *VM) Run(args ...Object) (Object, error)

Run runs VM and executes the instructions until the OpReturn Opcode or Abort call.

func (*VM) RunCompiledFunction 

func (vm *VM) RunCompiledFunction(
	f *CompiledFunction,
	args ...Object,
) (Object, error)

RunCompiledFunction runs given CompiledFunction as if it is Main function. Bytecode must be set before calling this method, because Fileset and Constants are copied.

func (*VM) RunCompiledFunctionOpts 

func (vm *VM) RunCompiledFunctionOpts(
	f *CompiledFunction,
	opts *RunOpts,
) (Object, error)

RunCompiledFunctionOpts runs given CompiledFunction as if it is Main function. Bytecode must be set before calling this method, because Fileset and Constants are copied.

func (*VM) RunOpts 

func (vm *VM) RunOpts(opts *RunOpts) (Object, error)

RunOpts runs VM and executes the instructions until the OpReturn Opcode or Abort call.

func (*VM) SetBytecode 

func (vm *VM) SetBytecode(bc *Bytecode) *VM

SetBytecode enables to set a new Bytecode.

func (*VM) SetRecover 

func (vm *VM) SetRecover(v bool) *VM

SetRecover recovers panic when Run panics and returns panic as an error. If error handler is present `try-catch-finally`, VM continues to run from catch/finally.

func (*VM) Setup 

func (vm *VM) Setup(opts SetupOpts) *VM

func (*VM) ToInterface 

func (vm *VM) ToInterface(v Object) any

func (*VM) ToInterfaceArray 

func (vm *VM) ToInterfaceArray(v Array) (ret []any)

func (*VM) ToObject 

func (vm *VM) ToObject(v any) (Object, error)

func (*VM) ToObjectArray 

func (vm *VM) ToObjectArray(v []any) (ret Array, err error)

func (*VM) Write 

func (vm *VM) Write(b []byte) (int, error)

type VMCaller 

type VMCaller interface {
	Call() (Object, error)
	Close()
	Callee() CallerObject
}

type ValuesGetter 

type ValuesGetter interface {
	Object
	Values() (arr Array)
}

ValuesGetter is an interface for returns values.

type ValuesIterator 

type ValuesIterator interface {
	Iterator
	Values() Array
}

type Writer 

type Writer interface {
	Object
	io.Writer
	GoWriter() io.Writer
}

func NewTypedWriter 

func NewTypedWriter(w io.Writer, typ ObjectType) Writer

func NewWriter 

func NewWriter(w io.Writer) Writer

type Zeroer 

type Zeroer interface {
	IsZero() bool
}

Source Files

View all Source files

Directories

Path Synopsis
cmd
gad
gaddoc
mkcallable
mkoptypes
internal
compat
ast
node
source
utils
fmt
helper
json
strings
Package strings provides strings module implementing simple functions to manipulate UTF-8 encoded strings for Gad script language.
 Package strings provides strings module implementing simple functions to manipulate UTF-8 encoded strings for Gad script language.
time
Package time provides time module for measuring and displaying time for Gad script language.
 Package time provides time module for measuring and displaying time for Gad script language.

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