Function getProtoExt

ext/protos.go:118–127

getProtoExt generates a select expression for a fully-qualified extension name on a protobuf message.

(mef cel.MacroExprFactory, target ast.Expr, args []ast.Expr)

// getProtoExt generates a select expression for a fully-qualified extension name on a protobuf message.
func getProtoExt(mef cel.MacroExprFactory, target ast.Expr, args []ast.Expr) (ast.Expr, *cel.Error) {
	if !macroTargetMatchesNamespace(protoNamespace, target) {
		return nil, nil
	}
	extFieldName, err := getExtFieldName(mef, args[1])
	if err != nil {
		return nil, err
	}
	return mef.NewSelect(args[0], extFieldName), nil
}

func getExtFieldName(mef cel.MacroExprFactory, expr ast.Expr) (string, *cel.Error) {
	isValid := false