If you specialise a class template,you must also specialise all member functions. Although it is possible to specialise a single member function,once you have done so,you can no longer specialise the whole class.
然而以下编译在gcc上
模板
<typename T>struct C { T foo (); T bar ();};template <>struct C<int> { int foo (); int bar () {return 4;}};template <typename T>T C<T> :: foo () {return 0;}template <typename T>T C<T> :: bar () {return 1;}int C<int> :: foo () {return 2;}template <>float C<float> :: bar () {return 3;}#include <cassert>int main () { C<int> i; C<float> f; assert (2 == i .foo ()); assert (0 == f .foo ()); assert (4 == i .bar ()); assert (3 == f .bar ());}
我有专门的C< int> :: foo和C< float> :: bar所以教科书错了,gcc超出了标准,还是我误解了整个情况?
谢谢.
解决方法 你不能做这个:template <typename T> struct C{ T foo () { return 0;} T bar () { return 1;}};// partial specialization of foo on C<int>template <>int C<int> :: foo () {return 2;}// partial specialization of bar on C<float>template <>float C<float> :: bar () {return 3;}// will not compile,C<int> already partially specializedtemplate <>struct C<int>{ int foo() {return 10;} int bar() {return 10;}};总结
以上是内存溢出为你收集整理的c – 这本教科书错了吗?专注于某些成员职能而不是其他职能全部内容,希望文章能够帮你解决c – 这本教科书错了吗?专注于某些成员职能而不是其他职能所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错,欢迎将内存溢出网站推荐给程序员好友。
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)