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Implementation of result_of<> as we're discussing it for the Bind proposal

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[SVN r1037]
This commit is contained in:
Douglas Gregor
2003-02-22 21:38:38 +00:00
parent ee250bda6c
commit 95d04d0f5a
1 changed files with 34 additions and 0 deletions
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result_of_test.cpp Normal file
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#include <boost/result_of.hpp>
#include <utility>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_same.hpp>
class int_result_type { typedef int result_type; };
class int_result_of
{
template<typename F> struct result_of { typedef int type; };
};
class int_result_type_and_float_result_of
{
typedef int result_type;
template<typename F> struct result_of { typedef float type; };
};
struct X {};
int main()
{
using namespace boost;
typedef int (*func_ptr)(float, double);
typedef int (X::*mem_func_ptr)(float);
BOOST_STATIC_ASSERT((is_same<result_of<int_result_type(float)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<result_of<int_result_of(double)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_and_float_result_of(char)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<result_of<func_ptr(char, float)>::type, int>::value));
BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr(X,char)>::type, int>::value));
return 0;
}