exp

package

v0.0.0-...-5e93b50 Latest Latest Go to latest Published: Mar 26, 2024 License: MIT Imports: 10 Imported by: 2

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Repository

github.com/pub-go/tpl

Links

Open Source Insights

Documentation ¶

Index ¶

Variables
func Evaluate(startPos Pos, tree parser.IExpressionContext, data Scope) (any, error)
func IsBool(input any) (bool, bool)
func IsComplex(value any) (complex128, bool)
func IsFloat(value any) (float64, bool)
func IsInt(value any) (int64, bool)
func IsNil(a any) bool
func IsNull(a any) bool
func IsString(input any) (string, bool)
func NameOfFunction(f interface{}) string
func NewErrorListener(start Pos) *errorListener
func NewVisitor(pos Pos, s Scope) *visitor
func NotNil(a any) bool
func NotNull(a any) bool
func ParseCode(input string, opts ...parseCodeOpt) (tree parser.IExpressionContext, err error)
func ReflectConvert[T any](from any) (to T)
func ToBytes(a any) (s []byte)
func ToNumber[T Integer | Float](a any) (n T)
func ToRunes(a any) (s []rune)
func ToString(a any) string
func TreesToString(tree parser.IExpressionContext) string
func WithStartPos(pos Pos) parseCodeOpt
type Complex
type Float
type Integer
type Ordered
type Pos
- func NewPos(line, column int) Pos
- func (p Pos) Add(line, column int) Pos
- func (p Pos) String() string
type Scope
- func Combine(s, p Scope) Scope
- func EmptyScope() Scope
- func NewScope(data any) Scope
- func WithDefaultScope(s Scope) Scope
type Signed
type Unsigned

Constants ¶

This section is empty.

Variables ¶

View Source

var ErrInputTooLong = fmt.Errorf("input too long")

View Source

var ErrNoSuchValue = fmt.Errorf("no such value")

Functions ¶

func Evaluate ¶

func Evaluate(startPos Pos, tree parser.IExpressionContext, data Scope) (any, error)

Evaluate 对语法树求值

func IsBool ¶

func IsBool(input any) (bool, bool)

func IsComplex ¶

func IsComplex(value any) (complex128, bool)

func IsFloat ¶

func IsFloat(value any) (float64, bool)

func IsInt ¶

func IsInt(value any) (int64, bool)

func IsNil ¶

func IsNil(a any) bool

func IsNull ¶

func IsNull(a any) bool

func IsString ¶

func IsString(input any) (string, bool)

func NameOfFunction ¶

func NameOfFunction(f interface{}) string

NameOfFunction 获取函数的全限定名

func NewErrorListener ¶

func NewErrorListener(start Pos) *errorListener

NewErrorListener 新建词法/语法分析错误监听器

func NewVisitor ¶

func NewVisitor(pos Pos, s Scope) *visitor

NewVisitor 创建一个 Visitor 实例通过 Visitor 遍历语法树来对其求值

func NotNil ¶

func NotNil(a any) bool

func NotNull ¶

func NotNull(a any) bool

func ParseCode ¶

func ParseCode(input string, opts ...parseCodeOpt) (tree parser.IExpressionContext, err error)

ParseCode 解析代码为语法树

func ReflectConvert ¶

func ReflectConvert[T any](from any) (to T)

func ToBytes ¶

func ToBytes(a any) (s []byte)

func ToNumber ¶

func ToNumber[T Integer | Float](a any) (n T)

func ToRunes ¶

func ToRunes(a any) (s []rune)

func ToString ¶

func ToString(a any) string

func TreesToString ¶

func TreesToString(tree parser.IExpressionContext) string

TreesToString 打印语法树的工具函数

func WithStartPos ¶

func WithStartPos(pos Pos) parseCodeOpt

WithStartPos 设置代码的起始位置默认是起始于第 1 行第 1 列

Types ¶

type Complex ¶

type Complex interface {
	~complex64 | ~complex128
}

type Float ¶

type Float interface {
	~float32 | ~float64
}

type Integer ¶

type Integer interface {
	Signed | Unsigned
}

type Ordered ¶

type Ordered interface {
	Integer | Float | ~string
}

type Pos ¶

type Pos struct {
	Line   int // 行
	Column int // 列
}

Pos 行列位置

func NewPos ¶

func NewPos(line, column int) Pos

func (Pos) Add ¶

func (p Pos) Add(line, column int) Pos

func (Pos) String ¶

func (p Pos) String() string

type Scope ¶

type Scope interface {
	// Get 从该作用域内获取 name 对应的值
	// 返回 ErrNoSuchValue 表示该作用域中无 name 对应的值
	Get(name string) (result any, err error)
}

Scope 表示一个作用域

func Combine ¶

func Combine(s, p Scope) Scope

Combine 组合两个作用域当子作用域中找不到时从父作用域找

func EmptyScope ¶

func EmptyScope() Scope

EmptyScope 构造一个没有任何值的作用域

func NewScope ¶

func NewScope(data any) Scope

NewScope 从结构体/map/数组/切片新建作用域

func WithDefaultScope ¶

func WithDefaultScope(s Scope) Scope

WithDefaultScope 组合默认作用域

type Signed ¶

type Signed interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64
}

type Unsigned ¶

type Unsigned interface {
	~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr
}

Source Files ¶

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Directories ¶

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