C++是否建在STL部分,以交换两个数值,而不是:
int tmp = var1;
var1 = var2;
var2 = tmp;
与此类似:
std::swapValues(var1, var2);
当swapValues是一个模板。
C++是否建在STL部分,以交换两个数值,而不是:
int tmp = var1;
var1 = var2;
var2 = tmp;
与此类似:
std::swapValues(var1, var2);
当swapValues是一个模板。
http://en.cppvis.com/w/cpp/algorithm/swap”rel=“nofollow noreferer”>。
std::swap(var1, var2);
正如斯蒂芬所说,使用<代码>std:swap(var1, var2);。
它是一个模版的职能,因此,你可以向特定类别提供自己的专业,例如智能点工,这些类别可能有昂贵的派任操作员:
namespace std
{
template<>
void swap<MySmartPointer>(MySmartPointer& v1, MySmartPointer& v2)
{
std::swap(v1.internalPointer, v2.internalPointer);
}
}
// ...
std::swap(pointerA, pointerB); // super-fast!!!!1
那里还有Boost Swap。
http://www.boost.org/doc/libs/1_43_0/libs/utility/swap.html。
它克服了目前标准互换执行方面的一些限制。 如果你想要提高您的几类工作的效率,你仍然必须提供自己的专业技能,但是,在如何提供这些专业方面,你有更大的余地。
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