这是VS 2005的Bug吗？ [英] Is this a Bug of VS 2005?
问题描述
这是VS 2005的Bug吗？
我们知道size_t不是C ++中的内置数据类型，而只是一个
typedef声明。
但是，我发现以下代码通常可以用VS编译
2005：
//请注意，我不在此源文件中包含任何头文件
size_t测试（size_t a）
{
返回a;
}
int main（）
{
size_t n =测试（8）;
返回n;
}
为什么？这真的是VS 2005的错误吗？
Is this a Bug of VS 2005?
We know size_t is not a built-in data type in C++, rather, it is just a
typedef declaration.
However, I found the following code could be normally compiled with VS
2005:
// Note that I don''t include any header file in this source file
size_t Test(size_t a)
{
return a;
}
int main()
{
size_t n = Test(8);
return n;
}
Why? Is this really a bug of VS 2005?
推荐答案
2006年8月3日21:38:52 -0700，打火机 < cq **** @ gmail.comwrote
comp.lang.c ++：
On 3 Aug 2006 21:38:52 -0700, "Lighter" <cq****@gmail.comwrote in
comp.lang.c++:
这是VS 2005的Bug吗？
Is this a Bug of VS 2005?
No.
No.
我们知道size_t不是C ++中的内置数据类型，而是它只是一个
typedef声明。
但是，我发现以下代码通常可以用VS
2005编译：
//请注意，我不在此源文件中包含任何头文件
size_t Test（size_t a）
{
返回;
}
int main（）
{
size_t n =测试（8）;
返回n;
}
为什么？这真的是VS 2005的错误吗？
We know size_t is not a built-in data type in C++, rather, it is just a
typedef declaration.
However, I found the following code could be normally compiled with VS
2005:
// Note that I don''t include any header file in this source file
size_t Test(size_t a)
{
return a;
}
int main()
{
size_t n = Test(8);
return n;
}
Why? Is this really a bug of VS 2005?
它可以被视为一个扩展，并且扩展完全有效
，只要它们不影响严格符合的行为
计划。这不可能，因为该程序使用未定义的类型具有未定义的行为
。
此外，尝试通过添加某些内容来引发冲突喜欢：
typedef double size_t;
....在您的源文件中会导致更多未定义的行为，因为所有
typedef'继承自C库，包括size_t，是在全局和std命名空间中为编译器保留的。
-
Jack Klein
主页： http： //JK-Technology.Com
常见问题解答
comp.lang.c http://c-faq.com/
comp.lang.c ++ http://www.parashift.com/c++-faq-lite/
alt .comp.lang.learn.c-c ++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html
It can be considered an extension, and extensions are perfectly valid
as long as they do not affect the behavior of a strictly conforming
program. And this can''t, because the program has undefined behavior
by using an undefined type.
Furthermore, an attempt to cause a conflict by adding something like:
typedef double size_t;
....in your source file causes even more undefined behavior because all
typedef''s inherited from the C library, which includes size_t, are
reserved for the compiler in both the global and std namespaces.
--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://c-faq.com/
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html
给Jack Klein：
谢谢你的回答。但是，我不认为这是由VS 2005制作的C ++的扩展
。原因是VS 2005仍然可以正确编译上面的代码 - 甚至我设置了编译器
选项/ Za。
to Jack Klein:
Thank you for your answer. However, I don''t think this is an extension
for C++ made by VS 2005. The reason for this is that VS 2005 can still
correctly compile the code above-mentioned even I set the compiler
option /Za.
打火机??? é?????
Lighter ???é?????
这是VS 2005的Bug吗？
我们知道size_t不是内置的在C ++中的数据类型中，它只是一个
typedef声明。
然而，我发现以下代码通常可以用VS
2005：
//请注意，我不在此源文件中包含任何头文件
size_t测试（size_t a）
{
返回a;
}
int main（）
{
size_t n =测试（8）;
返回n;
}
为什么？这真的是VS 2005的错误吗？
Is this a Bug of VS 2005?
We know size_t is not a built-in data type in C++, rather, it is just a
typedef declaration.
However, I found the following code could be normally compiled with VS
2005:
// Note that I don''t include any header file in this source file
size_t Test(size_t a)
{
return a;
}
int main()
{
size_t n = Test(8);
return n;
}
Why? Is this really a bug of VS 2005?
一些头文件是默认包含。
Some "Header Files" is Default Includes.
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