http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57429
Bug ID: 57429
Summary: Dependent function call with one visible declaration,
deleted
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: potswa at mac dot com
A dependent function call can't be resolved until instantiation time, but if
there's only one candidate visible from the template definition, that candidate
is accessed such as to produce an error if deleted, even if it would be
eliminated by the first stages of overload resolution.
Clang accepts this valid TU but GCC produces two errors. Also a good idea to
test in a SFINAE context, which is where this cropped up.
void f() = delete;
template< typename t >
void ft() { f( t() ); }
template< typename t >
struct ct { decltype( f( t() ) ) m; };
The workaround is to define another overload, which may also be deleted.
