[Bug c++/31816] If a function foo is defined before declaring a template class A<T>, overloaded version of foo defined after the class declaration will not be available within class A<T>.
gael dot guennebaud at gmail dot com
gcc-bugzilla@gcc.gnu.org
Tue Feb 2 20:44:00 GMT 2010
------- Comment #5 from gael dot guennebaud at gmail dot com 2010-02-02 20:44 -------
I hit the same issue, and according to c++ standard, here we have a _dependent_
lookup, and so the qHash(int*) overloads should be found.
Here is an example directly taken from the C++ standard (14.6, #9):
#include <iostream>
void f(char) {std::cout << "char ";}
template<class T> void g(T t)
{
f(1); // f(char)
f(T(1)); // dependent
f(t); // dependent
}
void f(int) {std::cout << "int ";}
int main()
{
g(2); // will cause one call of f(char) followed
// by two calls of f(int)
g('a'); // will cause three calls of f(char)
}
according to the c++ standard, the output should be:
char int int char char char
but gcc (4.x) returns:
char char char char char char
so, bug or non-bug ?
--
gael dot guennebaud at gmail dot com changed:
What |Removed |Added
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CC| |gael dot guennebaud at gmail
| |dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31816
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