mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-11-03 21:40:52 -05:00
34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
|
|
||
|
|
// Copyright (C) 2009-2012 Lorenzo Caminiti
|
||
|
|
// Distributed under the Boost Software License, Version 1.0
|
||
|
|
// (see accompanying file LICENSE_1_0.txt or a copy at
|
||
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
// Home at http://www.boost.org/libs/config
|
||
|
|
|
||
|
|
// MACRO: BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
|
||
|
|
// TITLE: local classes as template parameters
|
||
|
|
// DESCRIPTION: Local classes cannot be passed as template parameters.
|
||
|
|
|
||
|
|
// NOTE: Local classes cannot be passed as template parameters in C++03 (even
|
||
|
|
// if some C++03 compilers, like MSVC and older GCC, allow it). Local classes
|
||
|
|
// can instead be passed as template parameters in C++11 (see also N2657, note
|
||
|
|
// that this macro does not check if unnamed types can also be passed as
|
||
|
|
// template parameters but it is intentionally limited to local named classes
|
||
|
|
// because some non C++11 compilers might only support local named classes as
|
||
|
|
// template parameters which is still very useful to program local functors).
|
||
|
|
namespace boost_no_cxx11_local_class_template_parameters {
|
||
|
|
|
||
|
|
template<typename T> struct a { void use() {} };
|
||
|
|
template<typename T> void f(T) {}
|
||
|
|
|
||
|
|
int test() {
|
||
|
|
class local_class {} local_obj;
|
||
|
|
a<local_class> a1;
|
||
|
|
a1.use(); // Avoid unused variable warning.
|
||
|
|
f(local_obj);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace
|
||
|
|
|