http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60361
Bug ID: 60361
Summary: unexpected 'use of parameter outside function body'
error
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rogero at howzatt dot demon.co.uk
When declaring a variable with a bracketed constructor call, and using the same
external name for the first argument and a template instantiation used as the
second argument, the delaration can fail to compile.
----- registration.cpp -----
struct Helper
{
Helper(int a, void (*pfunc)());
};
template <int I> void function();
const int A = 1;
const int B = 2;
Helper testOk(A, function<A>);
Helper testOk2(int(A), function<B>);
Helper testOk3((int(A)), function<A>);
// Why does (only) this one fail?
Helper testFail(int(A), function<A>);
----- ends -----
registration.cpp:18:34: error: use of parameter 'A' outside function body
Helper testFail(int(A), function<A>);
^
registration.cpp:18:34: error: use of parameter 'A' outside function body
registration.cpp:18:34: error: use of parameter 'A' outside function body
registration.cpp:18:36: error: no matching function for call to
'Helper::Helper(int, <unresolved overloaded function type>)'
Helper testFail(int(A), function<A>);
^
registration.cpp:18:36: note: candidates are:
registration.cpp:3:3: note: Helper::Helper(int, void (*)())
Helper(int a, void (*pfunc)());
^
registration.cpp:3:3: note: no known conversion for argument 2 from
'<unresolved overloaded function type>' to 'void (*)()'
registration.cpp:1:8: note: Helper::Helper(const Helper&)
struct Helper
^
registration.cpp:1:8: note: candidate expects 1 argument, 2 provided
----
Fails with g++ 4.9.0 and 4.8.1
Works with g++ 4.2.3, Clang 3.2, ICC 13.0 and MSVC 8 thru 12.
