A**u
发帖数: 2458 | 1 #include
#include
using namespace std;
namespace S{
class A{
};
void swap(const A& x, const A& y){
std::cout << "A swap" << std::endl;
}
}
int main()
{
S::A x;
S::A y;
swap(x,y);
//S::swap(x,y);
std::cout << "fishing" << std::endl;
return 0;
}
这个code里, namespace S里的 swap 比 std里的swap specific
为啥 gcc 编译后，调用std版本呢 | t****t
发帖数: 6806 | 2 because std::swap() accept (A&, A&) while S::swap() accept (const A&, const
A&). you called with (A&, A&). function overloading selects std::swap().
【在 A**u 的大作中提到】
: #include
: #include
: using namespace std;
: namespace S{
: class A{
: };
: void swap(const A& x, const A& y){
: std::cout << "A swap" << std::endl;
: }
: }
| A**u
发帖数: 2458 | 3 大牛 谢谢啦
才想起来 type&比 const type&优先
const
【在 t****t 的大作中提到】
: because std::swap() accept (A&, A&) while S::swap() accept (const A&, const
: A&). you called with (A&, A&). function overloading selects std::swap().
| B******5
发帖数: 4676 | 4 这些问题也太细节了。。。
【在 A**u 的大作中提到】
: 大牛 谢谢啦
: 才想起来 type&比 const type&优先
:
: const
| t****t
发帖数: 6806 | 5 library interface design is not an easy task from the beginning, no matter
what language you use. you want to cover a lot of details: efficiency,
readability, encapsulation, robust, adaptation, decoupling, ... beginners
may cover one or several, but you need experience to cover all of them.
【在 B******5 的大作中提到】
: 这些问题也太细节了。。。
| k****5
发帖数: 546 | 6 big cow, can't understand many details of language(c/c++) standard, what to
do?
【在 t****t 的大作中提到】
: library interface design is not an easy task from the beginning, no matter
: what language you use. you want to cover a lot of details: efficiency,
: readability, encapsulation, robust, adaptation, decoupling, ... beginners
: may cover one or several, but you need experience to cover all of them.
|
|
