是否为代表@前缀有什么特殊的含义？ [英] Does the @ prefix for delegates have any special meaning?
问题描述
有好几次我看到ReSharper的生成代码如下所示：
Several times I've seen ReSharper generate code that looks like this:
delegate void myHandler(int i);
myHandler myHandlerContainer;
...
foreach (Delegate @delegate in myHandlerContainer.GetInvocationList())
{...}
请问' @ 中的 @Delegate 给该变量的任何特殊语义？
或？它只是一个惯例我没有遇到之前
Does the '@' in @delegate give that variable any special semantic meaning?
Or is it just a convention I didn't encounter before?
推荐答案
从MSDN更多的细节：
Some more details from MSDN:
前缀@可以使用
关键字作为标识符，与其他
编程语言接口时
有用。字符@
为不实际的
标识符的一部分，所以该标识符可能是在其他语言视为正常
标识符
，没有前缀。与@前缀的
标识符称为
逐字标识符。对于不是
关键字是允许的，但强烈
气馁，因为风格问题标识符使用@
前缀。
The prefix "@" enables the use of keywords as identifiers, which is useful when interfacing with other programming languages. The character @ is not actually part of the identifier, so the identifier might be seen in other languages as a normal identifier, without the prefix. An identifier with an @ prefix is called a verbatim identifier. Use of the @ prefix for identifiers that are not keywords is permitted, but strongly discouraged as a matter of style.
from C# Language Specification: 2.4.2 Identifiers.
用前缀'@'允许如从命名可能以书面比C＃另一种语言库中定义的委托类派生的。
Prefixing with '@' therefore allows e.g. to derive from a class named "delegate" which might be defined in a library written in another language than C#.
在任何其他情况下，我不建议使用这种语法和相当弥补从C＃的关键字不同的标识符（如VALU而不是值）增加代码的可读性和避免混淆，是否有连接到它的任何特殊含义。
In any other case I would not recommend to use this syntax and rather make up identifiers different from the C# keywords (e.g. valu instead of value) to increase code readability and avoid confusion whether there is any special meaning attached to it.
有也是关于变量命名另一个有趣的事实有提到：
There is also another interesting fact about variable naming mentioned there:
标识符下划线字符（U + 005F）是
保留由
实施使用。例如，
的实施可能会提供有两个
下划线开头的扩展
关键字。
Identifiers containing two consecutive underscore characters (U+005F) are reserved for use by the implementation. For example, an implementation might provide extended keywords that begin with two underscores.
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