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chenchen — Sun, 08 Jan 2006 12:27:00 GMT

上说必须把重载的写在template的前�?然而我在vs2003上的��试是无所�?至于标准上怎么说那我就不知道了(ji��n),写在前面��׃��定保�?写在后面估计是有危险!

chenchen 2006-01-08 20:27 发表评论

re: VC�~�译器对FunctionTemplate实例化的优化

Sat, 17 Dec 2005 07:12:00 GMT

�q�个不是优化�Q�是语言本��n�Ҏ(gu��)��板的要求。也��是说C++语言本��n��决定了(ji��n)�q�个�l�果是必然结果。不��那个编译器正确的行为都是这个结果。而不是编译器的代码优化�?img src ="http://m.shnenglu.com/Edgard/aggbug/1848.html" width = "1" height = "1" />

清风�?/a> 2005-12-17 15:12 发表评论

Sat, 17 Dec 2005 07:08:00 GMT

无意闯到�q�边来了(ji��n)�?

我是在对几个概念不太清楚的情况下�Q�想找找说明。本来是不管�q�些概念的，但，我想试试特化是不��心(j��)写错�?ji��n)，�~�译器告诉我无法昄��化�?
我就�U�闷�?ji��n)，特化、偏特化、显�C�化�Q�所以，��x��找概�늚�介绍�Q�一不小�?j��)发��C��(ji��n)�q�个blog站，而你说的问题�Q�我又忍不住惛_��一下口。^_^

关于特化的匹配原则，��像我们期望的那��P��~�译器是优选最接近的�?
最��单的��试�Ҏ(gu��)��Q�就是针�Ҏ(gu��)��板圆形，特化形式分别�l�出不同输出�Q�这��P��一��g��能知道编译器选了(ji��n)谁�?img src ="http://m.shnenglu.com/Edgard/aggbug/1847.html" width = "1" height = "1" />

清风�?/a> 2005-12-17 15:08 发表评论

Edgard — Fri, 16 Dec 2005 04:47:00 GMT

上面是我��M��本书��试�q�的例子�Q�书中曾��_(d��)��(x��)This is only one example of code that might behave differently than expected as a result of detailed overload resolution rules. For example, the fact that not all overloaded functions are visible when a corresponding function call is made may or may not matter. In fact, defining a three-argument version of max() without having seen the declaration of a special two-argument version of max() for ints causes the two-argument template to be used by the three-argument version:�Q�这里的意思比较适合�W�二�U�情况，即”一个是�Q�inline int const& max��x��在template
inline T const& max之后。”，我没有能在其他C++�~�译器上��试�q�，不知道C++标准中是否规定FunctionTemplate Resolution Rules�Q�如果没有，依据上面的英文描�q�ͼ�不同�~�译器有不同的FunctionTemplate Resolution Rule�Q�有可能template
inline T const& max (T const& a, T const& b, T const& c) 不可见到��x��在后的inline int const& max�?

大家的意见呢�Q?img src ="http://m.shnenglu.com/Edgard/aggbug/1820.html" width = "1" height = "1" />

Edgard 2005-12-16 12:47 发表评论

��明 — Fri, 16 Dec 2005 02:26:00 GMT

Function templates can be overloaded with nontemplate functions. All else being equal, the nontemplate function is preferred in Function templates can be overloaded with nontemplate functions. All else being equal, the nontemplate function is preferred in selecting the actual function being called. The following example illustrates this:

// details/nontmpl.cpp

#include
#include

template
std::string f(T)
{
return "Template";
}

std::string f(int&)
{
return "Nontemplate";
}

int main()
{
int x = 7;
std::cout << f(x) << std::endl;
}
This should output:

Nontemplate

以上是C++ templates的原文�?
所以nontemplate的函数应该被匚w��调用�Q�跟声明的前后没关系

��明 2005-12-16 10:26 发表评论