builtins

package
Version: v0.10.2 Latest Latest
Warning

This package is not in the latest version of its module.

Go to latest
Published: Dec 10, 2018 License: Apache-2.0 Imports: 4 Imported by: 0

Documentation

Overview

Package builtins contains utilities for implementing built-in functions.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ArrayOperand added in v0.9.1

func ArrayOperand(x ast.Value, pos int) (ast.Array, error)

ArrayOperand converts x to an array. If the cast fails, a descriptive error is returned.

func FloatToNumber

func FloatToNumber(f *big.Float) ast.Number

FloatToNumber converts f to a number.

func IntOperand

func IntOperand(x ast.Value, pos int) (int, error)

IntOperand converts x to an int. If the cast fails, a descriptive error is returned.

func IntToNumber added in v0.8.0

func IntToNumber(i *big.Int) ast.Number

IntToNumber converts i to a number.

func NewOperandElementErr

func NewOperandElementErr(pos int, composite ast.Value, got ast.Value, expected ...string) error

NewOperandElementErr returns an operand error indicating an element in the composite operand was wrong.

func NewOperandEnumErr

func NewOperandEnumErr(pos int, expected ...string) error

NewOperandEnumErr returns an operand error indicating a value was wrong.

func NewOperandErr

func NewOperandErr(pos int, f string, a ...interface{}) error

NewOperandErr returns a generic operand error.

func NewOperandTypeErr

func NewOperandTypeErr(pos int, got ast.Value, expected ...string) error

NewOperandTypeErr returns an operand error indicating the operand's type was wrong.

func NumberOperand

func NumberOperand(x ast.Value, pos int) (ast.Number, error)

NumberOperand converts x to a number. If the cast fails, a descriptive error is returned.

func NumberToFloat

func NumberToFloat(n ast.Number) *big.Float

NumberToFloat converts n to a big float.

func NumberToInt added in v0.8.0

func NumberToInt(n ast.Number) *big.Int

NumberToInt converts n to a big int.

func ObjectOperand added in v0.7.0

func ObjectOperand(x ast.Value, pos int) (ast.Object, error)

ObjectOperand converts x to an object. If the cast fails, a descriptive error is returned.

func RuneSliceOperand added in v0.10.1

func RuneSliceOperand(x ast.Value, pos int) ([]rune, error)

RuneSliceOperand converts x to a []rune. If the cast fails, a descriptive error is returned.

func SetOperand

func SetOperand(x ast.Value, pos int) (ast.Set, error)

SetOperand converts x to a set. If the cast fails, a descriptive error is returned.

func StringOperand

func StringOperand(x ast.Value, pos int) (ast.String, error)

StringOperand converts x to a string. If the cast fails, a descriptive error is returned.

func StringSliceOperand added in v0.10.1

func StringSliceOperand(x ast.Value, pos int) ([]string, error)

StringSliceOperand converts x to a []string. If the cast fails, a descriptive error is returned.

Types

type Cache added in v0.5.0

type Cache map[interface{}]interface{}

Cache defines the built-in cache used by the top-down evaluation. The keys must be comparable and should not be of type string.

func (Cache) Get added in v0.5.0

func (c Cache) Get(k interface{}) (interface{}, bool)

Get returns the cached value for k.

func (Cache) Put added in v0.5.0

func (c Cache) Put(k, v interface{})

Put updates the cache for the named built-in.

type ErrOperand

type ErrOperand string

ErrOperand represents an invalid operand has been passed to a built-in function. Built-ins should return ErrOperand to indicate a type error has occurred.

func (ErrOperand) Error

func (err ErrOperand) Error() string

Source Files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
t or T : Toggle theme light dark auto
y or Y : Canonical URL