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added new result_of mode that uses TR1 with a decltype fallback as suggested by Nathan Crookston; fixes #7753

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[SVN r84949]
This commit is contained in:
Daniel Walker
2013-07-03 22:14:27 +00:00
parent 9baf33dd16
commit 15021632dc
4 changed files with 89 additions and 17 deletions
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12
test/result_of_test.cpp
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@@ -5,6 +5,12 @@
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Examples:
// To run the default test:
// $ cd libs/utility/test && bjam
// To test decltype on g++ 2.7:
// $ cd libs/utility/test && bjam cxxflags="-std=c++11 -D BOOST_RESULT_OF_USE_DECLTYPE"
#include <boost/config.hpp>
// For more information, see http://www.boost.org/libs/utility
@@ -190,7 +196,7 @@ int main()
BOOST_STATIC_ASSERT((is_same<tr1_result_of<volatile int_result_of_template<void>(void)>::type, void>::value));
// Prior to decltype, result_of could not deduce the return type
// nullary function objects unless they exposed a result_type.
// of nullary function objects unless they exposed a result_type.
#if defined(BOOST_RESULT_OF_USE_DECLTYPE)
BOOST_STATIC_ASSERT((is_same<result_of<int_result_of(void)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<result_of<volatile int_result_of(void)>::type, int>::value));
@@ -273,7 +279,7 @@ int main()
BOOST_STATIC_ASSERT((is_same<tr1_result_of<pf_t(int)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<tr1_result_of<pf_t const(int)>::type,int>::value));
#if defined(BOOST_RESULT_OF_USE_DECLTYPE)
#if defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result(double)>::type, short>::value));
BOOST_STATIC_ASSERT((is_same<result_of<const no_result_type_or_result(double)>::type, cv_overload_check<const short> >::value));
BOOST_STATIC_ASSERT((is_same<result_of<volatile no_result_type_or_result(double)>::type, cv_overload_check<volatile short> >::value));
@@ -301,7 +307,7 @@ int main()
#endif
#endif
#if defined(BOOST_RESULT_OF_USE_DECLTYPE)
#if defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
int i = 123;
sfinae_test(sfinae_test_f, i);
#endif // defined(BOOST_RESULT_OF_USE_DECLTYPE)