Rational不支持可选参数 [英] Rational for not supporting optional arguments

问题描述

任何人都可以告诉我不支持可选的

参数是什么理由。


实现这显然是一件微不足道的事情，因为C ++已经有了他们，我不希望在没有充分理由的情况下省略它们。

Can anyone tell me what the rational is for not supporting optional
arguments.

It is obviously a trivial thing to implement and, since C++ has them, I
would not expect them to be omitted without a good reason.

推荐答案

可选参数没有写入公共语言规范，

因此并非所有.NET语言都能理解它们。我相信

C＃意味着符合CLS，因此不支持可选参数。


" Nick Hounsome"写道：

Optional parameters was not written into the Common Language Specification,
so therefore not all .NET languages are able to understand them. I believe
C# is meant to be CLS compliant, and so no support for optional parameters.

"Nick Hounsome" wrote:

任何人都可以告诉我不支持可选的
论证是什么理由。

这实际上是一件微不足道的事情，由于C ++有它们，我不希望它们在没有充分理由的情况下被省略。

Can anyone tell me what the rational is for not supporting optional
arguments.

It is obviously a trivial thing to implement and, since C++ has them, I
would not expect them to be omitted without a good reason.

rmacias < RM ***** @ newsgroup.nospam>在留言中写道

新闻：7F ********************************** @ microsof t.com ...

"rmacias" <rm*****@newsgroup.nospam> wrote in message
news:7F**********************************@microsof t.com...

可选参数未写入公共语言
规范，因此并非所有.NET语言都能理解它们。我相信
C＃意味着符合CLS，因此不支持可选的
参数。


C＃充满了非CLS兼容功能。


可选参数甚至可以符合CLS。如果它是明确的，那么
表示编译器会产生等效的重载 - 它的价值比生成魔法的魔法少得多。物业方法和

事件访问。

" Nick Hounsome"写道：

Optional parameters was not written into the Common Language
Specification,
so therefore not all .NET languages are able to understand them. I
believe
C# is meant to be CLS compliant, and so no support for optional
parameters.
C# is full of non-CLS compliant features.

Optional parameters can even be made "CLS compliant" if it is explicitly
stated that the compiler will generate the equivalent overloads - it''s
considerably less magical than generating "magic" methods for property and
event access.
"Nick Hounsome" wrote:

任何人都可以告诉我不支持可选的
论证是什么理由。

这实际上是一件微不足道的事情，由于C ++有它们，我不希望它们在没有充分理由的情况下被省略。

Can anyone tell me what the rational is for not supporting optional
arguments.

It is obviously a trivial thing to implement and, since C++ has them, I
would not expect them to be omitted without a good reason.

Nick Hounsome写道：

Nick Hounsome wrote:

任何人都可以告诉我不支持可选的
参数是什么理由。

实现这显然是一件微不足道的事情，因为C ++有他们，我不希望在没有充分理由的情况下省略它们。

Can anyone tell me what the rational is for not supporting optional
arguments.

It is obviously a trivial thing to implement and, since C++ has them, I
would not expect them to be omitted without a good reason.

我相信大多数版本。因为默认值最终将* b $ b加到*调用*程序集中，如果新版本的程序集出现

且具有不同的默认值，则最终会出现问题。


Jon

Mostly versioning, I believe. Because the default values end up baked
into the *calling* assembly, if a new version of the assembly comes out
with different default values, you end up with problems.

Jon

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