Function MakeHas

parser/macro.go:550–556

MakeHas expands the input call arguments into a presence test, e.g. has( .field)

(eh ExprHelper, target ast.Expr, args []ast.Expr)

// MakeHas expands the input call arguments into a presence test, e.g. has(<operand>.field)
func MakeHas(eh ExprHelper, target ast.Expr, args []ast.Expr) (ast.Expr, *common.Error) {
	if args[0].Kind() == ast.SelectKind {
		s := args[0].AsSelect()
		return eh.NewPresenceTest(s.Operand(), s.FieldName()), nil
	}
	return nil, eh.NewError(args[0].ID(), "invalid argument to has() macro")
}

func makeQuantifier(kind quantifierKind, eh ExprHelper, target ast.Expr, args []ast.Expr) (ast.Expr, *common.Error) {
	v, found := extractIdent(args[0])