Function mathGreatest

ext/math.go:643–668

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

}

func mathGreatest(mef cel.MacroExprFactory, target ast.Expr, args []ast.Expr) (ast.Expr, *cel.Error) {
	if !macroTargetMatchesNamespace(mathNamespace, target) {
		return nil, nil
	}
	switch len(args) {
	case 0:
		return nil, mef.NewError(target.ID(), "math.greatest() requires at least one argument")
	case 1:
		if isListLiteralWithNumericArgs(args[0]) || isNumericArgType(args[0]) {
			return mef.NewCall(maxFunc, args[0]), nil
		}
		return nil, mef.NewError(args[0].ID(), "math.greatest() invalid single argument value")
	case 2:
		err := checkInvalidArgs(mef, "math.greatest()", args)
		if err != nil {
			return nil, err
		}
		return mef.NewCall(maxFunc, args...), nil
	default:
		err := checkInvalidArgs(mef, "math.greatest()", args)
		if err != nil {
			return nil, err
		}
		return mef.NewCall(maxFunc, mef.NewList(args...)), nil
	}
}

func identity(val ref.Val) ref.Val {
	return val