package operators

import "github.com/google/cel-go/common/operators"

Package operators defines the internal function names of operators.

All operators in the expression language are modelled as function calls.

Index ¶

• Constants
• func Arity(symbol string) int
• func Find(text string) (string, bool)
• func FindReverse(symbol string) (string, bool)
• func FindReverseBinaryOperator(symbol string) (string, bool)
• func Precedence(symbol string) int

Constants ¶

const (
	// Symbolic operators.
	Conditional   = "_?_:_"
	LogicalAnd    = "_&&_"
	LogicalOr     = "_||_"
	LogicalNot    = "!_"
	Equals        = "_==_"
	NotEquals     = "_!=_"
	Less          = "_<_"
	LessEquals    = "_<=_"
	Greater       = "_>_"
	GreaterEquals = "_>=_"
	Add           = "_+_"
	Subtract      = "_-_"
	Multiply      = "_*_"
	Divide        = "_/_"
	Modulo        = "_%_"
	Negate        = "-_"
	Index         = "_[_]"
	OptIndex      = "_[?_]"
	OptSelect     = "_?._"

	// Macros, must have a valid identifier.
	Has       = "has"
	All       = "all"
	Exists    = "exists"
	ExistsOne = "exists_one"
	Map       = "map"
	Filter    = "filter"

	// Named operators, must not have be valid identifiers.
	NotStrictlyFalse = "@not_strictly_false"
	In               = "@in"

	// Deprecated: named operators with valid identifiers.
	OldNotStrictlyFalse = "__not_strictly_false__"
	OldIn               = "_in_"
)

String "names" for CEL operators.

Functions ¶

func Arity ¶

func Arity(symbol string) int

Arity returns the number of argument the operator takes -1 is returned if an undefined symbol is provided

func Find ¶

func Find(text string) (string, bool)

Find the internal function name for an operator, if the input text is one.

func FindReverse ¶

func FindReverse(symbol string) (string, bool)

FindReverse returns the unmangled, text representation of the operator.

func FindReverseBinaryOperator ¶

func FindReverseBinaryOperator(symbol string) (string, bool)

FindReverseBinaryOperator returns the unmangled, text representation of a binary operator.

If the symbol does refer to an operator, but the operator does not have a display name the result is false.

func Precedence ¶

func Precedence(symbol string) int

Precedence returns the operator precedence, where the higher the number indicates higher precedence operations.

Source Files ¶

operators.go