这应该是不言自明的。我正在尝试实现分发排序,而 MSVC 编译器正在崩溃。这似乎是与我的 SFINAE 检测成员函数有关的特定情况,如果我不将 indexert 传递给函数,也不替换 has_get_index,这似乎不会发生。如果我删除任何剩余的索引器重载,它也不会发生。getIndex() const
如果 sortable 有成员,问题仍然存在。
1>test.cpp(34): fatal error C1001: An internal error has occurred in the compiler.
1> (compiler file 'msc1.cpp', line 1420)
1> To work around this problem, try simplifying or changing the program near the locations listed above.
(没有“上面列出的位置”)一个最小的测试用例是:
#include <vector>
#include <iterator>
#include <type_traits>
#ifndef HAS_MEM_FUNC //SFINAE (or maybe it is?)
#define HAS_MEM_FUNC(name, func) \
template<typename T> \
struct name { \
typedef char yes[1]; \
typedef char no [2]; \
template <typename C> static yes& test( typename C::func ) ; \
template <typename C> static no& test(...); \
static bool const value = sizeof(test<T>(0)) == sizeof(yes); \
}
#endif
HAS_MEM_FUNC(has_get_index,getIndex);
//default indexer undefined
template <class T>
double indexer(...);
//indexer for objects that have a "T::getIndex() const" member
template <class T>
double indexer(const typename std::enable_if<has_get_index<T>::value,T>::type& b) {
return b.getIndex();
};
template<class indexert>
void function(indexert indexeri)
{}
struct sortable {};
int main () {
function(indexer<sortable>); //line 34
}