core

package
v0.2.2 Latest Latest
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 Go to latest Published: May 12, 2026 License: MIT Imports: 24 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// Pos constants
	NoPos Pos = 0

	// Value type constants
	VT_UNDEFINED          = uint8(0) // must be first (zero)
	VT_VALUE_PTR          = uint8(1)
	VT_BUILTIN_FUNCTION   = uint8(2)
	VT_COMPILED_FUNCTION  = uint8(3)
	VT_FORMAT_SPEC        = uint8(4)
	VT_ERROR              = uint8(5)
	VT_BOOL               = uint8(6)
	VT_BYTE               = uint8(7)
	VT_RUNE               = uint8(8)
	VT_INT                = uint8(9)
	VT_FLOAT              = uint8(10)
	VT_DECIMAL            = uint8(11)
	VT_TIME               = uint8(12)
	VT_STRING             = uint8(13)
	VT_RUNES              = uint8(14)
	VT_BYTES              = uint8(15)
	VT_ARRAY              = uint8(16)
	VT_RECORD             = uint8(17)
	VT_DICT               = uint8(18)
	VT_INT_RANGE          = uint8(19)
	VT_RUNES_ITERATOR     = uint8(20)
	VT_BYTES_ITERATOR     = uint8(21)
	VT_ARRAY_ITERATOR     = uint8(22)
	VT_DICT_ITERATOR      = uint8(23)
	VT_INT_RANGE_ITERATOR = uint8(24)
	VT_USER_DEFINED       = uint8(25) // must be last
)
View Source 
const (
	OpConstant       = Opcode(0)  // Load constant
	OpBComplement    = Opcode(1)  // bitwise complement
	OpPop            = Opcode(2)  // Pop
	OpTrue           = Opcode(3)  // Push true
	OpFalse          = Opcode(4)  // Push false
	OpEqual          = Opcode(5)  // Equal ==
	OpNotEqual       = Opcode(6)  // Not equal !=
	OpMinus          = Opcode(7)  // Minus -
	OpLNot           = Opcode(8)  // Logical not !
	OpJumpFalsy      = Opcode(9)  // Jump if falsy
	OpAndJump        = Opcode(10) // Logical AND jump
	OpOrJump         = Opcode(11) // Logical OR jump
	OpJump           = Opcode(12) // Jump
	OpNull           = Opcode(13) // Push null
	OpArray          = Opcode(14) // Array object
	OpRecord         = Opcode(15) // Record object
	OpContains       = Opcode(16) // Contains operation (x in y)
	OpImmutable      = Opcode(17) // Immutable object
	OpIndex          = Opcode(18) // Index operation
	OpSliceIndex     = Opcode(19) // Slice operation
	OpCall           = Opcode(20) // Call function
	OpReturn         = Opcode(21) // Return
	OpGetGlobal      = Opcode(22) // Get global variable
	OpSetGlobal      = Opcode(23) // Set global variable
	OpSetSelGlobal   = Opcode(24) // Set global variable using selectors
	OpGetLocal       = Opcode(25) // Get local variable
	OpSetLocal       = Opcode(26) // Set local variable
	OpDefineLocal    = Opcode(27) // Define local variable
	OpSetSelLocal    = Opcode(28) // Set local variable using selectors
	OpGetFreePtr     = Opcode(29) // Get free variable pointer object
	OpGetFree        = Opcode(30) // Get free variables
	OpSetFree        = Opcode(31) // Set free variables
	OpGetLocalPtr    = Opcode(32) // Get local variable as a pointer
	OpSetSelFree     = Opcode(33) // Set free variables using selectors
	OpGetBuiltin     = Opcode(34) // Get builtin function
	OpClosure        = Opcode(35) // Push closure
	OpIteratorInit   = Opcode(36) // Iterator init
	OpIteratorNext   = Opcode(37) // Iterator next
	OpIteratorKey    = Opcode(38) // Iterator key
	OpIteratorValue  = Opcode(39) // Iterator value
	OpBinaryOp       = Opcode(40) // Binary operation
	OpSuspend        = Opcode(41) // Suspend VM
	OpSelect         = Opcode(42) // Select operation
	OpMethodCall     = Opcode(43) // Call method on object
	OpSliceIndexStep = Opcode(44) // Slice with step
	OpFormat         = Opcode(45) // Format value with pre-parsed FormatSpec constant
	OpFormatDyn      = Opcode(46) // Format value with runtime-built FormatSpec string popped from the stack
	OpDefer          = Opcode(47) // Register deferred call: pop callee + N args, store on current frame
	OpDeferMethod    = Opcode(48) // Register deferred method call: pop receiver + N args; method name from constants[methodIdx]

)

List of opcodes

View Source 
const KindUser = "user"

KindUser is the kind tag automatically assigned to errors constructed from script via the error() builtin.

Variables

View Source 
var (
	// Value shortcuts
	True      = BoolValue(true)
	False     = BoolValue(false)
	Undefined = UndefinedValue()
)
View Source 
var OpcodeNames = [...]string{
	OpConstant:       "CONST",
	OpPop:            "POP",
	OpTrue:           "TRUE",
	OpFalse:          "FALSE",
	OpBComplement:    "NEG",
	OpEqual:          "EQL",
	OpNotEqual:       "NEQ",
	OpMinus:          "NEG",
	OpLNot:           "NOT",
	OpJumpFalsy:      "JMPF",
	OpAndJump:        "ANDJMP",
	OpOrJump:         "ORJMP",
	OpJump:           "JMP",
	OpNull:           "NULL",
	OpGetGlobal:      "GETG",
	OpSetGlobal:      "SETG",
	OpSetSelGlobal:   "SETSG",
	OpArray:          "ARR",
	OpRecord:         "RECORD",
	OpImmutable:      "IMMUT",
	OpIndex:          "INDEX",
	OpSliceIndex:     "SLICE",
	OpCall:           "CALL",
	OpSliceIndexStep: "SLICESTEP",
	OpReturn:         "RET",
	OpGetLocal:       "GETL",
	OpSetLocal:       "SETL",
	OpDefineLocal:    "DEFL",
	OpSetSelLocal:    "SETSL",
	OpGetBuiltin:     "BUILTIN",
	OpClosure:        "CLOSURE",
	OpGetFreePtr:     "GETFP",
	OpGetFree:        "GETF",
	OpSetFree:        "SETF",
	OpGetLocalPtr:    "GETLP",
	OpSetSelFree:     "SETSF",
	OpIteratorInit:   "ITER",
	OpIteratorNext:   "ITNXT",
	OpIteratorKey:    "ITKEY",
	OpIteratorValue:  "ITVAL",
	OpBinaryOp:       "BINARYOP",
	OpSuspend:        "SUSPEND",
	OpSelect:         "SELECT",
	OpMethodCall:     "MCALL",
	OpContains:       "CONTAINS",
	OpFormat:         "FMT",
	OpFormatDyn:      "FMTDYN",
	OpDefer:          "DEFER",
	OpDeferMethod:    "DEFERM",
}

OpcodeNames are string representation of opcodes.

View Source 
var OpcodeOperands = [...][]int{
	OpConstant:       {2},
	OpPop:            {},
	OpTrue:           {},
	OpFalse:          {},
	OpBComplement:    {},
	OpEqual:          {},
	OpNotEqual:       {},
	OpMinus:          {},
	OpLNot:           {},
	OpJumpFalsy:      {4},
	OpAndJump:        {4},
	OpOrJump:         {4},
	OpJump:           {4},
	OpNull:           {},
	OpGetGlobal:      {2},
	OpSetGlobal:      {2},
	OpSetSelGlobal:   {2, 1},
	OpArray:          {2},
	OpRecord:         {2},
	OpImmutable:      {},
	OpIndex:          {},
	OpSliceIndex:     {},
	OpCall:           {1, 1},
	OpSliceIndexStep: {},
	OpReturn:         {1},
	OpGetLocal:       {1},
	OpSetLocal:       {1},
	OpDefineLocal:    {1},
	OpSetSelLocal:    {1, 1},
	OpGetBuiltin:     {1},
	OpClosure:        {2, 1},
	OpGetFreePtr:     {1},
	OpGetFree:        {1},
	OpSetFree:        {1},
	OpGetLocalPtr:    {1},
	OpSetSelFree:     {1, 1},
	OpIteratorInit:   {},
	OpIteratorNext:   {},
	OpIteratorKey:    {},
	OpIteratorValue:  {},
	OpBinaryOp:       {1},
	OpSuspend:        {},
	OpSelect:         {},
	OpMethodCall:     {2, 1, 1},
	OpContains:       {},
	OpFormat:         {2},
	OpFormatDyn:      {},
	OpDefer:          {1},
	OpDeferMethod:    {2, 1},
}

OpcodeOperands is the number of operands.

View Source 
var ValueTypeDefaults = ValueType{
	Name:         defaultTypeName,
	String:       defaultTypeString,
	Format:       defaultTypeFormat,
	Interface:    defaultTypeInterface,
	EncodeJSON:   defaultTypeEncodeJSON,
	EncodeBinary: defaultTypeEncodeBinary,
	DecodeBinary: defaultTypeDecodeBinary,
	IsTrue:       defaultFalse,
	Copy:         defaultSelf,
	Equal:        defaultTypeEqualPrimitive,
	UnaryOp:      defaultTypeUnaryOp,
	BinaryOp:     defaultTypeBinaryOp,
	MethodCall:   defaultTypeMethodCall,

	IsIterable: defaultFalse,
	Contains:   defaultTypeContains,
	Len:        default0,
	Iterator:   defaultUndefined,
	Access:     defaultTypeAccess,
	Assign:     defaultTypeAssign,
	Append:     defaultTypeAppend,
	Slice:      defaultTypeSlice,
	Delete:     defaultTypeDelete,
	SliceStep:  defaultTypeSliceStep,

	IsCallable: defaultFalse,
	IsVariadic: defaultFalse,
	Arity:      defaultTypeArity,
	Call:       defaultTypeCall,

	Next:  defaultFalse,
	Key:   defaultUndefined,
	Value: defaultUndefined,

	AsBool:    defaultTypeAsBool,
	AsByte:    defaultTypeAsByte,
	AsRune:    defaultTypeAsRune,
	AsInt:     defaultTypeAsInt,
	AsFloat:   defaultTypeAsFloat,
	AsDecimal: defaultTypeAsDecimal,
	AsTime:    defaultTypeAsTime,
	AsString:  defaultTypeAsString,
	AsRunes:   defaultTypeAsRunes,
	AsBytes:   defaultTypeAsBytes,
	AsArray:   defaultTypeAsArray,
	AsDict:    defaultTypeAsDict,
}
View Source 
var ValueTypes [256]ValueType

Functions

func EncodeString 

func EncodeString(b []byte, val string) []byte

EncodeString encodes given string as JSON string according to https://www.json.org/img/string.png Implementation is inspired by https://github.com/json-iterator/go

func ReadOperands 

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

ReadOperands reads operands from the bytecode.

func SetValueType 

func SetValueType(t uint8, f ValueType) error

Types

type Arena added in v0.0.6 

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

func NewArena added in v0.0.6 

func NewArena(opts *ArenaOptions) *Arena

NewArena creates a new Arena with the given options. If opts is nil, it uses the default options.

func (*Arena) NewArray added in v0.0.6 

func (a *Arena) NewArray(capacity int, sized bool) []Value

func (*Arena) NewArrayIteratorValue added in v0.0.6 

func (a *Arena) NewArrayIteratorValue(arr []Value) Value

func (*Arena) NewArrayValue added in v0.0.6 

func (a *Arena) NewArrayValue(arr []Value, immutable bool) Value

func (*Arena) NewBuiltinFunctionValue added in v0.0.6 

func (a *Arena) NewBuiltinFunctionValue(name string, fn NativeFunc, arity int8, variadic bool) Value

func (*Arena) NewBytes added in v0.0.6 

func (a *Arena) NewBytes(capacity int, sized bool) []byte

func (*Arena) NewBytesIteratorValue added in v0.0.6 

func (a *Arena) NewBytesIteratorValue(b []byte) Value

func (*Arena) NewBytesValue added in v0.0.6 

func (a *Arena) NewBytesValue(b []byte, immutable bool) Value

func (*Arena) NewCompiledFunctionValue added in v0.0.6 

func (a *Arena) NewCompiledFunctionValue(instructions []byte, free []*Value, sourceMap map[int]Pos, numLocals int, numParameters int8, varArgs bool) Value

func (*Arena) NewDecimal added in v0.0.6 

func (a *Arena) NewDecimal() *dec128.Dec128

func (*Arena) NewDict added in v0.0.8 

func (a *Arena) NewDict(capacity int) map[string]Value

func (*Arena) NewDictIteratorValue added in v0.0.8 

func (a *Arena) NewDictIteratorValue(m map[string]Value) Value

func (*Arena) NewDictValue added in v0.0.8 

func (a *Arena) NewDictValue(m map[string]Value, immutable bool) Value

func (*Arena) NewIntRangeIteratorValue added in v0.0.6 

func (a *Arena) NewIntRangeIteratorValue(start, stop, step int64) Value

func (*Arena) NewIntRangeValue added in v0.0.6 

func (a *Arena) NewIntRangeValue(start, stop, step int64) Value

func (*Arena) NewRecordValue added in v0.0.6 

func (a *Arena) NewRecordValue(m map[string]Value, immutable bool) Value

func (*Arena) NewRunes added in v0.0.6 

func (a *Arena) NewRunes(capacity int, sized bool) []rune

func (*Arena) NewRunesIteratorValue added in v0.0.6 

func (a *Arena) NewRunesIteratorValue(s []rune) Value

func (*Arena) NewRunesValue added in v0.0.6 

func (a *Arena) NewRunesValue(r []rune, immutable bool) Value

func (*Arena) NewStringValue added in v0.0.6 

func (a *Arena) NewStringValue(s string) Value

func (*Arena) NewTime added in v0.0.6 

func (a *Arena) NewTime() *time.Time

func (*Arena) Payload added in v0.0.7 

func (a *Arena) Payload() any

Payload returns the payload associated with the arena, which can be used to store any additional data or context used by user-defined types and functions.

func (*Arena) Reset added in v0.0.6 

func (a *Arena) Reset()

func (*Arena) Stat added in v0.0.6 

func (a *Arena) Stat() map[string]slab.Stats

type ArenaOptions added in v0.0.6 

type ArenaOptions struct {
	Decimals int
	Times    int

	BytesNum int
	BytesCap int

	RunesNum int
	RunesCap int

	ArraysNum int
	ArraysCap int

	BuiltinFunctions  int
	CompiledFunctions int

	StringValues   int
	RunesValues    int
	BytesValues    int
	ArrayValues    int
	DictValues     int
	IntRangeValues int

	RunesIterators    int
	BytesIterators    int
	ArrayIterators    int
	DictIterators     int
	IntRangeIterators int

	Payload Resettable
}

func DefaultArenaOptions added in v0.0.6 

func DefaultArenaOptions() *ArenaOptions

type Array 

type Array struct {
	Elements []Value
}

func (*Array) Set 

func (o *Array) Set(elements []Value)

type ArrayIterator 

type ArrayIterator struct {
	Elements []Value
	// contains filtered or unexported fields
}

func (*ArrayIterator) Set 

func (i *ArrayIterator) Set(v []Value)

type BuiltinFunction 

type BuiltinFunction struct {
	Func     NativeFunc
	Name     string
	Arity    int8
	Variadic bool
}

func (*BuiltinFunction) Set 

func (f *BuiltinFunction) Set(fn NativeFunc, name string, arity int8, variadic bool)

type Bytes 

type Bytes struct {
	Elements []byte
}

func (*Bytes) Set 

func (o *Bytes) Set(elements []byte)

type BytesIterator 

type BytesIterator struct {
	Elements []byte
	// contains filtered or unexported fields
}

func (*BytesIterator) Set 

func (o *BytesIterator) Set(vals []byte)

type CompiledFunction 

type CompiledFunction struct {
	Instructions  []byte
	Free          []*Value
	SourceMap     map[int]Pos
	NumLocals     int // number of local variables (including function parameters)
	NumParameters int8
	VarArgs       bool
	NamedResult   int8 // local-slot index of function's named result: 0 = no named result, N > 0 means slot N-1
}

func (*CompiledFunction) HasNamedResult added in v0.2.1 

func (o *CompiledFunction) HasNamedResult() bool

HasNamedResult reports whether the function declares a named result.

func (*CompiledFunction) NamedResultSlot added in v0.2.1 

func (o *CompiledFunction) NamedResultSlot() int

NamedResultSlot returns the local-slot index of the named result. Caller should check HasNamedResult first.

func (*CompiledFunction) Set 

func (o *CompiledFunction) Set(instructions []byte, free []*Value, sourceMap map[int]Pos, numLocals int, numParameters int8, varArgs bool)

func (*CompiledFunction) Size 

func (o *CompiledFunction) Size() int64

func (*CompiledFunction) SourcePos 

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

type Dict added in v0.0.8 

type Dict struct {
	Elements map[string]Value
}

func (*Dict) Set added in v0.0.8 

func (o *Dict) Set(elements map[string]Value)

type DictIterator added in v0.0.8 

type DictIterator struct {
	Elements map[string]Value
	Keys     []string
	// contains filtered or unexported fields
}

func (*DictIterator) Set added in v0.0.8 

func (o *DictIterator) Set(m map[string]Value)

type Error 

type Error struct {
	Payload Value
	Kind    string
	Fatal   bool
}

type FormatSpecValue added in v0.1.3 

type FormatSpecValue struct {
	Spec fspec.FormatSpec
	Text string // original mini-language text (without the leading ':')
}

FormatSpecValue wraps a fully parsed fspec.FormatSpec together with its original textual form. It is an internal value kind: it lives only in the constant pool (referenced by OpFormat) and is never visible to user code.

type IntRange 

type IntRange struct {
	Start int64
	Stop  int64
	Step  int64
}

func (*IntRange) Contains 

func (o *IntRange) Contains(i int64) bool

func (*IntRange) Empty 

func (o *IntRange) Empty() bool

func (*IntRange) Get 

func (o *IntRange) Get(i int64) (int64, bool)

func (*IntRange) Len 

func (o *IntRange) Len() int64

func (*IntRange) Set 

func (o *IntRange) Set(start, stop, step int64)

type IntRangeIterator 

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

func (*IntRangeIterator) Set 

func (i *IntRangeIterator) Set(start, stop, step int64)

type NativeFunc 

type NativeFunc = func(VM, []Value) (Value, error)

type Opcode 

type Opcode = byte

type Pos 

type Pos int

func (Pos) IsValid 

func (p Pos) IsValid() bool

type Resettable added in v0.0.7 

type Resettable interface {
	Reset()
}

type Runes added in v0.0.6 

type Runes struct {
	Elements []rune
}

func (*Runes) Set added in v0.0.6 

func (o *Runes) Set(r []rune)

type RunesIterator added in v0.0.6 

type RunesIterator struct {
	Elements []rune
	// contains filtered or unexported fields
}

func (*RunesIterator) Set added in v0.0.6 

func (i *RunesIterator) Set(v []rune)

type String 

type String struct {
	Value string
}

func (*String) Set 

func (o *String) Set(s string)

type VM 

type VM interface {
	Allocator() *Arena                              // returns the arena allocator used by this VM
	Abort()                                         // aborts execution of the current script
	IsStackEmpty() bool                             // returns true if there are no frames on the call stack
	Call(*CompiledFunction, []Value) (Value, error) // calls a compiled function
	Run() error                                     // runs the VM until completion
	Recover() Value                                 // returns the in-flight error if in "deferred-for" frame
}

type Value 

type Value struct {
	Type  uint8
	Const bool
	Data  uint64
	Ptr   unsafe.Pointer
}

func ArrayIteratorValue 

func ArrayIteratorValue(v *ArrayIterator) Value

func ArrayValue 

func ArrayValue(v *Array, immutable bool) Value

ArrayValue creates boxed array value.

func BoolValue 

func BoolValue(b bool) Value

BoolValue creates new boxed bool value.

func BuiltinFunctionValue 

func BuiltinFunctionValue(f *BuiltinFunction) Value

BuiltinFunctionValue creates new boxed builtin function value.

func ByteValue added in v0.0.10 

func ByteValue(v byte) Value

ByteValue creates new boxed byte value.

func BytesIteratorValue 

func BytesIteratorValue(v *BytesIterator) Value

func BytesValue 

func BytesValue(v *Bytes, immutable bool) Value

BytesValue creates new boxed bytes value.

func CompiledFunctionValue 

func CompiledFunctionValue(f *CompiledFunction) Value

CompiledFunctionValue creates new boxed compiled function value.

func DecimalValue 

func DecimalValue(d *dec128.Dec128) Value

DecimalValue creates new boxed decimal value.

func DictIteratorValue added in v0.0.8 

func DictIteratorValue(v *DictIterator) Value

func DictValue added in v0.0.8 

func DictValue(v *Dict, immutable bool) Value

DictValue creates new boxed dict value.

func ErrorValue 

func ErrorValue(v *Error) Value

ErrorValue creates new boxed error value.

func FloatValue 

func FloatValue(f float64) Value

FloatValue creates new boxed float value.

func IntRangeIteratorValue 

func IntRangeIteratorValue(v *IntRangeIterator) Value

func IntRangeValue 

func IntRangeValue(v *IntRange) Value

IntRangeValue creates boxed int-range value.

func IntValue 

func IntValue(i int64) Value

IntValue creates new boxed int value.

func NewArrayIteratorValue 

func NewArrayIteratorValue(v []Value) Value

func NewArrayValue 

func NewArrayValue(vals []Value, immutable bool) Value

NewArrayValue creates a new (heap-allocated) array value.

func NewBuiltinFunctionValue 

func NewBuiltinFunctionValue(name string, fn NativeFunc, arity int8, variadic bool) Value

NewBuiltinFunctionValue creates new (heap-allocated) builtin function value.

func NewBytesIteratorValue 

func NewBytesIteratorValue(vals []byte) Value

func NewBytesValue 

func NewBytesValue(v []byte, immutable bool) Value

NewBytesValue creates new (heap-allocated) bytes value.

func NewCompiledFunctionValue 

func NewCompiledFunctionValue(instructions []byte, free []*Value, sourceMap map[int]Pos, numLocals int, numParameters int8, varArgs bool) Value

NewCompiledFunctionValue creates new (heap-allocated) compiled function value.

func NewDecimalValue 

func NewDecimalValue(d dec128.Dec128) Value

NewDecimalValue creates new (heap-allocated) boxed decimal value.

func NewDictIteratorValue added in v0.0.8 

func NewDictIteratorValue(m map[string]Value) Value

func NewDictValue added in v0.0.8 

func NewDictValue(vals map[string]Value, immutable bool) Value

NewDictValue creates new (heap-allocated) dict value.

func NewErrorValue 

func NewErrorValue(payload Value) Value

NewErrorValue creates a heap-allocated user-kind recoverable error value. Script-level errors are recoverable by default — the zero value of the Fatal flag (false) keeps user errors visible to deferred recover().

func NewFatalErrorValue added in v0.2.1 

func NewFatalErrorValue(payload Value) Value

NewFatalErrorValue creates a heap-allocated user-kind fatal error value. A fatal error, when raised, bypasses recover() and stops the VM, propagating to the host caller.

func NewFormatSpecValue added in v0.1.3 

func NewFormatSpecValue(spec fspec.FormatSpec, text string) Value

NewFormatSpecValue boxes a parsed FormatSpec for the constant pool.

func NewIntRangeIteratorValue 

func NewIntRangeIteratorValue(start, stop, step int64) Value

func NewIntRangeValue 

func NewIntRangeValue(start, stop, step int64) Value

NewIntRangeValue creates a new (heap-allocated) int-range value.

func NewRecordValue 

func NewRecordValue(vals map[string]Value, immutable bool) Value

NewRecordValue creates new (heap-allocated) record value.

func NewRunesIteratorValue added in v0.0.6 

func NewRunesIteratorValue(v []rune) Value

func NewRunesValue added in v0.0.6 

func NewRunesValue(v []rune, immutable bool) Value

NewRunesValue creates new (heap-allocated) runes value.

func NewRuntimeErrorValue added in v0.2.1 

func NewRuntimeErrorValue(kind string, fatal bool, message string) Value

NewRuntimeErrorValue creates a heap-allocated error value with explicit kind, fatality and a string message wrapped as the payload. Used internally by the runtime when boxing an *errs.Error so that script-level recover() can inspect it (and so the round-trip back to a Go *errs.Error preserves severity).

func NewStringValue 

func NewStringValue(v string) Value

NewStringValue creates new (heap-allocated) string value.

func NewTimeValue 

func NewTimeValue(t time.Time) Value

NewTimeValue creates new (heap-allocated) boxed time value.

func RecordValue 

func RecordValue(v *Dict, immutable bool) Value

RecordValue creates new boxed record value.

func RuneValue added in v0.0.6 

func RuneValue(c rune) Value

RuneValue creates new rune value.

func RunesIteratorValue added in v0.0.6 

func RunesIteratorValue(v *RunesIterator) Value

func RunesValue added in v0.0.6 

func RunesValue(v *Runes, immutable bool) Value

RunesValue creates new boxed runes value.

func StringValue 

func StringValue(v *String) Value

StringValue creates new boxed string value.

func TimeValue 

func TimeValue(v *time.Time) Value

TimeValue creates new boxed time value.

func UndefinedValue 

func UndefinedValue() Value

UndefinedValue creates new boxed undefined value.

func ValuePtrValue 

func ValuePtrValue(p *Value) Value

ValuePtrValue creates new boxed value pointer value.

func (Value) Access 

func (v Value) Access(vm VM, index Value, mode Opcode) (Value, error)

func (Value) Append 

func (v Value) Append(a *Arena, args []Value) (Value, error)

func (Value) Arity 

func (v Value) Arity() int8

func (Value) AsArray 

func (v Value) AsArray(a *Arena) ([]Value, bool)

func (Value) AsBool 

func (v Value) AsBool() (bool, bool)

func (Value) AsByte 

func (v Value) AsByte() (byte, bool)

func (Value) AsBytes 

func (v Value) AsBytes() ([]byte, bool)

func (Value) AsDecimal 

func (v Value) AsDecimal() (dec128.Dec128, bool)

func (Value) AsDict added in v0.0.8 

func (v Value) AsDict(a *Arena) (map[string]Value, bool)

func (Value) AsFloat 

func (v Value) AsFloat() (float64, bool)

func (Value) AsInt 

func (v Value) AsInt() (int64, bool)

func (Value) AsRune added in v0.0.6 

func (v Value) AsRune() (rune, bool)

func (Value) AsRunes added in v0.0.6 

func (v Value) AsRunes() ([]rune, bool)

func (Value) AsString 

func (v Value) AsString() (string, bool)

func (Value) AsTime 

func (v Value) AsTime() (time.Time, bool)

func (Value) Assign 

func (v Value) Assign(idx Value, val Value) error

func (Value) BinaryOp 

func (v Value) BinaryOp(a *Arena, op token.Token, rhs Value) (Value, error)

func (Value) Call 

func (v Value) Call(vm VM, args []Value) (Value, error)

func (Value) Contains 

func (v Value) Contains(e Value) bool

func (*Value) Copy 

func (v *Value) Copy(a *Arena) (Value, error)

func (*Value) DecodeBinary 

func (v *Value) DecodeBinary(data []byte) error

func (Value) Delete 

func (v Value) Delete(key Value) (Value, error)

func (Value) EncodeBinary 

func (v Value) EncodeBinary() ([]byte, error)

func (Value) EncodeJSON 

func (v Value) EncodeJSON() ([]byte, error)

func (Value) Equal 

func (v Value) Equal(rhs Value) bool

func (Value) Format added in v0.1.3 

func (v Value) Format(sp fspec.FormatSpec) (string, error)

func (*Value) GobDecode 

func (v *Value) GobDecode(data []byte) error

func (Value) GobEncode 

func (v Value) GobEncode() ([]byte, error)

func (Value) Immutable 

func (v Value) Immutable(a *Arena) (Value, error)

func (Value) Interface 

func (v Value) Interface() any

func (Value) IsCallable 

func (v Value) IsCallable() bool

func (Value) IsImmutable 

func (v Value) IsImmutable() bool

func (Value) IsIterable 

func (v Value) IsIterable() bool

func (Value) IsTrue 

func (v Value) IsTrue() bool

func (Value) IsUserDefined 

func (v Value) IsUserDefined() bool

func (Value) IsVariadic 

func (v Value) IsVariadic() bool

func (Value) Iterator 

func (v Value) Iterator(a *Arena) (Value, error)

func (Value) Key 

func (v Value) Key(a *Arena) (Value, error)

func (Value) Len 

func (v Value) Len() int64

func (Value) MethodCall 

func (v Value) MethodCall(vm VM, name string, args []Value) (Value, error)

func (Value) Next 

func (v Value) Next() bool

func (*Value) Set 

func (v *Value) Set(val Value)

func (Value) Slice 

func (v Value) Slice(a *Arena, s Value, e Value) (Value, error)

func (Value) SliceStep added in v0.0.10 

func (v Value) SliceStep(a *Arena, s Value, e Value, step Value) (Value, error)

func (Value) String 

func (v Value) String() string

func (Value) TypeName 

func (v Value) TypeName() string

func (Value) UnaryOp 

func (v Value) UnaryOp(a *Arena, op token.Token) (Value, error)

func (Value) Value 

func (v Value) Value(a *Arena) (Value, error)

type ValueType 

type ValueType struct {
	Name         func(v Value) string
	String       func(v Value) string
	Format       func(v Value, sp fspec.FormatSpec) (string, error)
	Interface    func(v Value) any
	EncodeJSON   func(v Value) ([]byte, error)
	EncodeBinary func(v Value) ([]byte, error)
	DecodeBinary func(v *Value, data []byte) error
	IsTrue       func(v Value) bool
	Copy         func(v Value, a *Arena) (Value, error)
	Equal        func(v Value, r Value) bool
	UnaryOp      func(v Value, a *Arena, op token.Token) (Value, error)
	BinaryOp     func(v Value, a *Arena, op token.Token, r Value) (Value, error)
	MethodCall   func(v Value, vm VM, name string, args []Value) (Value, error)

	IsIterable func(v Value) bool
	Contains   func(v Value, e Value) bool
	Len        func(v Value) int64
	Iterator   func(v Value, a *Arena) (Value, error)
	Access     func(v Value, a *Arena, index Value, mode Opcode) (Value, error)
	Assign     func(v Value, index Value, r Value) error
	Append     func(v Value, a *Arena, args []Value) (Value, error)
	Slice      func(v Value, a *Arena, s Value, e Value) (Value, error)
	Delete     func(v Value, key Value) (Value, error)
	SliceStep  func(v Value, a *Arena, s Value, e Value, step Value) (Value, error)

	IsCallable func(v Value) bool
	IsVariadic func(v Value) bool
	Arity      func(v Value) int8
	Call       func(v Value, vm VM, args []Value) (Value, error)

	Next  func(v Value) bool
	Key   func(v Value, a *Arena) (Value, error)
	Value func(v Value, a *Arena) (Value, error)

	AsBool    func(v Value) (bool, bool)
	AsByte    func(v Value) (byte, bool)
	AsRune    func(v Value) (rune, bool)
	AsInt     func(v Value) (int64, bool)
	AsFloat   func(v Value) (float64, bool)
	AsDecimal func(v Value) (dec128.Dec128, bool)
	AsTime    func(v Value) (time.Time, bool)
	AsString  func(v Value) (string, bool)
	AsRunes   func(v Value) ([]rune, bool)
	AsBytes   func(v Value) ([]byte, bool)
	AsArray   func(v Value, a *Arena) ([]Value, bool)
	AsDict    func(v Value, a *Arena) (map[string]Value, bool)
}

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