expression

Documentation

Index

• func EvalExpression(expr *Expression, msg protoreflect.Message) (string, error)
• type Expression
  • func MustParseExpression(input string) *Expression
  • func ParseExpression(input string) (*Expression, error)
• type Fragment
• type Query

Functions

func EvalExpression

func EvalExpression(expr *Expression, msg protoreflect.Message) (string, error)

EvalExpression evaluates an expression against a proto message

Types

type Expression

type Expression struct {
	Fragments []*Fragment `parser:"@@*"`
}

Declare simple grammer for bloblang expressions

func MustParseExpression

func MustParseExpression(input string) *Expression

MustParseExpression attempts to parse an Expression and panics on error

func ParseExpression

func ParseExpression(input string) (*Expression, error)

ParseExpression parses an Expression value from the provided string

type Fragment

type Fragment struct {
	Ident string `parser:"( @String"`
	Expr  *Query `parser:"  | '${!' @@ '}' )"`
}

Declare simple grammer for bloblang expressions

type Query

type Query struct {
	Mapping string `parser:"@Mapping"`
	// contains filtered or unexported fields
}

Declare simple grammer for bloblang expressions