http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55668
Bug #: 55668
Summary: Incorrect lookup for template member of dependent
template
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: tud...@fb.com
The following correct program gives an error; it appears that "a.template
foo<0>" looks up foo in global scope and fails because it believes that foo
takes a class first template argument instead of an int.
// The bug is not triggered if the template below is missing,
// or if it is a class or function or global variable instead of
// a template.
template <class T> class foo;
template <int N> struct A {
template <int K> void foo(int val) { }
};
template <int N> struct B {
// The bug is not triggered if "bar" is named "foo"
void bar() {
a.template foo<0>(42);
}
// This has to depend on N; A<0> doesn't trigger the bug
A<N> a;
};
The error I get:
d.cpp: In member function `void B<N>::bar()`:
d.cpp:13:21: error: type/value mismatch at argument 1 in template parameter
list for `template<class T> class foo`
d.cpp:13:21: error: expected a type, got `0`
Broken in 4.1.2, 4.6.2, 4.7.1 (the three versions I have access to).
(The bug was minimized from actual code, in which the method in question was
named "set" and collided with std::set, as we had "using std::set")
