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gval

package module

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Versions in this module

v1

v1.2.2

Jun 12, 2022

Changes in this version

+ func EvaluateWithContext(c context.Context, expression string, parameter interface{}, opts ...Language) (interface{}, error)

+ type Evaluables []Evaluable

+ func (evs Evaluables) EvalStrings(c context.Context, parameter interface{}) ([]string, error)

type Language

+ func DecimalArithmetic() Language

+ func DefaultExtension(ext func(context.Context, *Parser) (Evaluable, error)) Language

+ func Ident() Language

+ func InfixDecimalOperator(name string, f func(a, b decimal.Decimal) (interface{}, error)) Language

+ func Init(ext func(context.Context, *Parser) (Evaluable, error)) Language

+ func Parentheses() Language

+ func VariableSelector(selector func(path Evaluables) Evaluable) Language

+ func (l Language) EvaluateWithContext(c context.Context, expression string, parameter interface{}) (interface{}, error)

+ func (l Language) NewEvaluableWithContext(c context.Context, expression string) (Evaluable, error)

type Parser

+ func (p *Parser) ParseSublanguage(c context.Context, l Language) (Evaluable, error)

+ func (p *Parser) SetIsIdentRuneFunc(fn func(ch rune, i int) bool)

+ func (p *Parser) SetMode(mode uint)

+ func (p *Parser) SetWhitespace(chars ...rune)

+ type Selector interface

+ SelectGVal func(c context.Context, key string) (interface{}, error)

v0

v0.1.0

Oct 24, 2017

Changes in this version

+ func Evaluate(expression string, parameter interface{}, opts ...Language) (interface{}, error)

+ type Evaluable func(c context.Context, parameter interface{}) (interface{}, error)

+ func (e Evaluable) EvalBool(c context.Context, parameter interface{}) (bool, error)

+ func (e Evaluable) EvalFloat64(c context.Context, parameter interface{}) (float64, error)

+ func (e Evaluable) EvalInt(c context.Context, parameter interface{}) (int, error)

+ func (e Evaluable) EvalString(c context.Context, parameter interface{}) (string, error)

+ func (e Evaluable) IsConst() bool

+ type Language struct

+ func Arithmetic() Language

+ func Base() Language

+ func Bitmask() Language

+ func Constant(name string, value interface{}) Language

+ func Full(extensions ...Language) Language

+ func Function(name string, function interface{}) Language

+ func InfixBoolOperator(name string, f func(a, b bool) (interface{}, error)) Language

+ func InfixEvalOperator(name string, f func(a, b Evaluable) (Evaluable, error)) Language

+ func InfixNumberOperator(name string, f func(a, b float64) (interface{}, error)) Language

+ func InfixOperator(name string, f func(a, b interface{}) (interface{}, error)) Language

+ func InfixShortCircuit(name string, f func(a interface{}) (interface{}, bool)) Language

+ func InfixTextOperator(name string, f func(a, b string) (interface{}, error)) Language

+ func JSON() Language

+ func NewLanguage(bases ...Language) Language

+ func PostfixOperator(name string, ext func(context.Context, *Parser, Evaluable) (Evaluable, error)) Language

+ func Precedence(name string, operatorPrecendence uint8) Language

+ func PrefixExtension(r rune, ext func(context.Context, *Parser) (Evaluable, error)) Language

+ func PrefixMetaPrefix(r rune, ...) Language

+ func PrefixOperator(name string, e Evaluable) Language

+ func PropositionalLogic() Language

+ func Text() Language

+ func (l Language) Evaluate(expression string, parameter interface{}) (interface{}, error)

+ func (l Language) NewEvaluable(expression string) (Evaluable, error)

+ type Parser struct

+ func (*Parser) Const(value interface{}) Evaluable

+ func (*Parser) Var(path ...Evaluable) Evaluable

+ func (p *Parser) Camouflage(unit string, expected ...rune)

+ func (p *Parser) Expected(unit string, expected ...rune) error

+ func (p *Parser) Next() rune

+ func (p *Parser) ParseExpression(c context.Context) (eval Evaluable, err error)

+ func (p *Parser) ParseNextExpression(c context.Context) (eval Evaluable, err error)

+ func (p *Parser) Peek() rune

+ func (p *Parser) Scan() rune

+ func (p *Parser) TokenText() string

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