// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// func-builtins.go
package expr

import (
	"fmt"
)

func isNilFunc(ctx ExprContext, name string, args []any) (result any, err error) {
	if len(args) == 1 {
		result = args[0] == nil
	} else {
		err = fmt.Errorf("%s() requires exactly one param", name)
	}
	return
}

func ImportBuiltinsFuncs(ctx ExprContext) {
	ctx.RegisterFunc("isNil", &simpleFunctor{f: isNilFunc}, 1, -1)
}

func init() {
	registerImport("builtins", ImportBuiltinsFuncs)
}