|
在下面的代码中,我尝试使用CRTP来使用Parent类中Child类的静态成员"value".当编译使用g ++ 5.2.1与"-pedantic"标志的代码,我能够编译预期,并且在执行双方c.print_value();并Child::print_value();打印出4.
#include
template
struct Parent
{
static const int value = DE::value;
static void print_value ()
{
std::cout
struct Child : Parent >
{
static const int value = N;
};
int
main ()
{
Child c;
c.print_value();
Child::print_value();
}
但是,当使用clang ++ 3.7编译相同的代码时,我遇到了编译失败.
crtp_clang_error.cpp:9:32: error: no member named 'value' in 'Child'
static const int value = DE::value;
~~~~^
crtp_clang_error.cpp:27:16: note: in instantiation of template class 'Parent >' requested here
struct Child : Parent >
^
crtp_clang_error.cpp:38:16: note: in instantiation of template class 'Child' requested here
Child c;
^
crtp_clang_error.cpp:40:3: error: no member named 'print_value' in 'Child'; did you mean 'Parent >::print_value'?
Child::print_value();
^~~~~~~~~~~~~~~~~~~~~~~~~
Parent >::print_value
crtp_clang_error.cpp:11:15: note: 'Parent >::print_value' declared here
static void print_value ()
我不确定这是一个Clang ++ bug还是GCC hack.非常感谢一些见解.
|