http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54058
Bug #: 54058
Summary: Injected friend functions are not considered when
using contextual type info to take a function address
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: andy.m.j...@gmail.com
Created attachment 27851
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27851
Compiler output
When attempting to take a function address where contextual type info is
needed, injected friend functions are not properly considered.
Here is the source file:
template<typename Derived> struct Injector
{
friend Derived const f(Derived const &) { return Derived(); }
};
struct A : Injector<A> {};
struct B : Injector<B> {};
int main()
{
A const (*fp)(A const &) = &f;
(void)fp;
}
The error given is particularly confusing: g++ reports no matching function,
but then proceeds to give a list of candidates that includes an exact match!
test.cpp: In function ‘int main()’:
test.cpp:11:31: error: no matches converting function ‘f’ to type ‘const struct
A (*)(const struct A&)’
test.cpp:3:24: error: candidates are: const A f(const A&)
test.cpp:3:24: error: const B f(const B&)
The full output of "g++ -v -save-temps -Wall -Wextra test.cpp" is attached.
Found with g++ 4.5.2.
