c#关键词implicit和explicit

系统管理员 2022-08-13 06:59 142阅读 0赞

implicit \[ɪmˈplɪsɪt\] adj.不言明\[含蓄\]的; 无疑问的，绝对的; 成为一部份的; 内含的;

explicit \[ɪkˈsplɪsɪt\] adj.明确的，清楚的; 直言的; 详述的; 不隐瞒的;

百度：[http://baike.baidu.com/link?url=YzBfLNJG8OePWMApO\_IrD2lnLI52IqAYEAdm7XR9C-N0UbtRHE5lwuzuRw6PsAPhCXFoB0JVGYKwCzExnM210K][http_baike.baidu.com_link_url_YzBfLNJG8OePWMApO_IrD2lnLI52IqAYEAdm7XR9C-N0UbtRHE5lwuzuRw6PsAPhCXFoB0JVGYKwCzExnM210K]

implicit 关键字用于声明隐式的用户定义类型转换[运算符][Link 1]。如果转换过程可以确保不会造成数据丢失，则可使用该关键字在用户定义类型和其他类型之间进行隐式转换。

MSDN参考：

[http://msdn.microsoft.com/zh-cn/library/z5z9kes2.aspx][http_msdn.microsoft.com_zh-cn_library_z5z9kes2.aspx] implicit

[https://msdn.microsoft.com/zh-cn/library/xhbhezf4.aspx][https_msdn.microsoft.com_zh-cn_library_xhbhezf4.aspx] explicit

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace LinqExpTest
    {
        class testimplicit
        {
            public static void kk()
            {
                Digit dig = new Digit(7);
                //This call invokes the implicit "double" operator
                double num = dig;
                //This call invokes the implicit "Digit" operator
                Digit dig2 = 12;
                Console.WriteLine("num = {0} dig2 = {1}", num, dig2.val);
                Console.ReadLine();
            }
        }
        class Digit
        {
            public double val;
            public Digit(double d)
            {
                val = d;
            }
            
            // User-defined conversion from Digit to double
            public static implicit operator double(Digit d)
            {
                return d.val;
            }
            //  User-defined conversion from double to Digit
            public static implicit operator Digit(double d)
            {
                return new Digit(d);
            }
        }
    }

static void Main(string[] args)
            {
                //ExecuteCode(aa);
                ExecuteCode(testimplicit.kk);
                Console.ReadKey();
            }

输出：

num = 7 dig2 = 12

相关文章 c\#中operator关键字： [http://blog.csdn.net/joyhen/article/details/47470047][http_blog.csdn.net_joyhen_article_details_47470047]

[http_baike.baidu.com_link_url_YzBfLNJG8OePWMApO_IrD2lnLI52IqAYEAdm7XR9C-N0UbtRHE5lwuzuRw6PsAPhCXFoB0JVGYKwCzExnM210K]: http://baike.baidu.com/link?url=YzBfLNJG8OePWMApO_IrD2lnLI52IqAYEAdm7XR9C-N0UbtRHE5lwuzuRw6PsAPhCXFoB0JVGYKwCzExnM210K
[Link 1]: http://baike.baidu.com/view/425996.htm
[http_msdn.microsoft.com_zh-cn_library_z5z9kes2.aspx]: http://msdn.microsoft.com/zh-cn/library/z5z9kes2.aspx
[https_msdn.microsoft.com_zh-cn_library_xhbhezf4.aspx]: https://msdn.microsoft.com/zh-cn/library/xhbhezf4.aspx
[http_blog.csdn.net_joyhen_article_details_47470047]: http://blog.csdn.net/joyhen/article/details/47470047