http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57211
Bug #: 57211
Summary: wrong line indicated in warning for synthesized method
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: d...@gcc.gnu.org
seen at least in 4.6, 4.7, 4.8 and trunk:
$ g++-4.8 -c -std=c++11 -Wunused-parameter test.cpp
test.cpp:3:8: warning: unused parameter 'p' [-Wunused-parameter]
struct A // line pointed-to by warning
^
test.cpp: In function 'int main()':
test.cpp:21:11: note: synthesized method 'A& A::operator=(A&&)' first required
here
b = std::move(a);
^
$ cat test.cpp
#include <functional>
struct A // line pointed-to by warning
{
struct B
{
B& operator=(B&&) { return *this; }
};
B f;
A() = default;
A& operator=(A&& p) = default; // where the method is declared
};
int main()
{
A a;
A b;
b = std::move(a);
}
