123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322 |
- // Boost result_of library
- // Copyright Douglas Gregor 2003-2004. Use, modification and
- // distribution is subject to the Boost Software License, Version
- // 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
- #include <boost/utility/result_of.hpp>
- #include <utility>
- #include <boost/static_assert.hpp>
- #include <boost/type_traits/is_same.hpp>
- struct int_result_type
- {
- typedef int result_type;
- result_type operator()(float);
- };
- struct int_result_of
- {
- template<typename F> struct result { typedef int type; };
- result<int_result_of(double)>::type operator()(double);
- result<const int_result_of(double)>::type operator()(double) const;
- result<int_result_of()>::type operator()();
- result<volatile int_result_of()>::type operator()() volatile;
- };
- struct int_result_type_and_float_result_of_and_char_return
- {
- typedef int result_type;
- template<typename F> struct result { typedef float type; };
- char operator()(char);
- };
- template<typename T>
- struct int_result_type_template
- {
- typedef int result_type;
- result_type operator()(float);
- };
- template<typename T>
- struct int_result_of_template
- {
- template<typename F> struct result;
- template<typename This, typename That> struct result<This(That)> { typedef int type; };
- typename result<int_result_of_template<T>(double)>::type operator()(double);
- typename result<const int_result_of_template<T>(double)>::type operator()(double) const;
- typename result<int_result_of_template<T>(double)>::type operator()();
- typename result<volatile int_result_of_template<T>(double)>::type operator()() volatile;
- };
- template<typename T>
- struct int_result_type_and_float_result_of_and_char_return_template
- {
- typedef int result_type;
- template<typename F> struct result;
- template<typename This, typename That> struct result<This(That)> { typedef float type; };
- char operator()(char);
- };
- template<typename T>
- struct cv_overload_check {};
- struct result_of_member_function_template
- {
- template<typename F> struct result;
- template<typename This, typename That> struct result<This(That)> { typedef That type; };
- template<class T> typename result<result_of_member_function_template(T)>::type operator()(T);
- template<typename This, typename That> struct result<const This(That)> { typedef cv_overload_check<const That> type; };
- template<class T> typename result<const result_of_member_function_template(T)>::type operator()(T) const;
- template<typename This, typename That> struct result<volatile This(That)> { typedef cv_overload_check<volatile That> type; };
- template<class T> typename result<volatile result_of_member_function_template(T)>::type operator()(T) volatile;
- template<typename This, typename That> struct result<const volatile This(That)> { typedef cv_overload_check<const volatile That> type; };
- template<class T> typename result<const volatile result_of_member_function_template(T)>::type operator()(T) const volatile;
- template<typename This, typename That> struct result<This(That &, That)> { typedef That & type; };
- template<class T> typename result<result_of_member_function_template(T &, T)>::type operator()(T &, T);
- template<typename This, typename That> struct result<This(That const &, That)> { typedef That const & type; };
- template<class T> typename result<result_of_member_function_template(T const &, T)>::type operator()(T const &, T);
- template<typename This, typename That> struct result<This(That volatile &, That)> { typedef That volatile & type; };
- template<class T> typename result<result_of_member_function_template(T volatile &, T)>::type operator()(T volatile &, T);
- template<typename This, typename That> struct result<This(That const volatile &, That)> { typedef That const volatile & type; };
- template<class T> typename result<result_of_member_function_template(T const volatile &, T)>::type operator()(T const volatile &, T);
- };
- struct no_result_type_or_result
- {
- short operator()(double);
- cv_overload_check<const short> operator()(double) const;
- cv_overload_check<volatile short> operator()(double) volatile;
- cv_overload_check<const volatile short> operator()(double) const volatile;
- int operator()();
- cv_overload_check<const int> operator()() const;
- cv_overload_check<volatile int> operator()() volatile;
- cv_overload_check<const volatile int> operator()() const volatile;
- #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
- short operator()(int&&);
- int operator()(int&);
- long operator()(int const&);
- #endif
- };
- template<typename T>
- struct no_result_type_or_result_template
- {
- short operator()(double);
- cv_overload_check<const short> operator()(double) const;
- cv_overload_check<volatile short> operator()(double) volatile;
- cv_overload_check<const volatile short> operator()(double) const volatile;
- int operator()();
- cv_overload_check<const int> operator()() const;
- cv_overload_check<volatile int> operator()() volatile;
- cv_overload_check<const volatile int> operator()() const volatile;
- #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
- short operator()(int&&);
- int operator()(int&);
- long operator()(int const&);
- #endif
- };
- // sfinae_tests are derived from example code from Joel de Guzman,
- // which demonstrated the interaction between result_of and SFINAE.
- template <typename F, typename Arg>
- typename boost::result_of<F(Arg const&)>::type
- sfinae_test(F f, Arg const& arg)
- {
- return f(arg);
- }
- template <typename F, typename Arg>
- typename boost::result_of<F(Arg&)>::type
- sfinae_test(F f, Arg& arg)
- {
- return f(arg);
- }
- int sfinae_test_f(int& i)
- {
- return i;
- }
- struct X {};
- int main()
- {
- using namespace boost;
- typedef int (*func_ptr)(float, double);
- typedef int (&func_ref)(float, double);
- typedef int (*func_ptr_0)();
- typedef int (&func_ref_0)();
- typedef void (*func_ptr_void)(float, double);
- typedef void (&func_ref_void)(float, double);
- typedef void (*func_ptr_void_0)();
- typedef void (&func_ref_void_0)();
- typedef int (X::*mem_func_ptr)(float);
- typedef int (X::*mem_func_ptr_c)(float) const;
- typedef int (X::*mem_func_ptr_v)(float) volatile;
- typedef int (X::*mem_func_ptr_cv)(float) const volatile;
- typedef int (X::*mem_func_ptr_0)();
- 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<const int_result_of(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_template<void>(float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_of_template<void>(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const int_result_of_template<void>(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_type(float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_of(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<const int_result_of(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_type_template<void>(float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_of_template<void>(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<const int_result_of_template<void>(double)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_of(void)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<volatile int_result_of(void)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_of_template<void>(void)>::type, void>::value));
- 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
- // 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));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_of_template<void>(void)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile int_result_of_template<void>(void)>::type, int>::value));
- #else
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_of(void)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile int_result_of(void)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_of_template<void>(void)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile int_result_of_template<void>(void)>::type, void>::value));
- #endif
- // Prior to decltype, result_of ignored a nested result<> if
- // result_type was defined. After decltype, result_of deduces the
- // actual return type of the function object, ignoring both
- // result<> and result_type.
- #if defined(BOOST_RESULT_OF_USE_DECLTYPE)
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_and_float_result_of_and_char_return(char)>::type, char>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_and_float_result_of_and_char_return_template<void>(char)>::type, char>::value));
- #else
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_and_float_result_of_and_char_return(char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<int_result_type_and_float_result_of_and_char_return_template<void>(char)>::type, int>::value));
- #endif
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_type_and_float_result_of_and_char_return(char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<int_result_type_and_float_result_of_and_char_return_template<void>(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<func_ref(char, float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ptr_0()>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ref_0()>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ptr_void(char, float)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ref_void(char, float)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ptr_void_0()>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ref_void_0()>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr_c(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr_v(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr_cv(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<mem_func_ptr_0(X)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ptr(char, float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ref(char, float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ptr_0()>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ref_0()>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ptr_void(char, float)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ref_void(char, float)>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ptr_void_0()>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ref_void_0()>::type, void>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<mem_func_ptr(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<mem_func_ptr_c(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<mem_func_ptr_v(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<mem_func_ptr_cv(X,char)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<mem_func_ptr_0(X)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ptr(void)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<func_ref(void)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<result_of_member_function_template(double)>::type, double>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const result_of_member_function_template(double)>::type, cv_overload_check<const double> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile result_of_member_function_template(double)>::type, cv_overload_check<volatile double> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const volatile result_of_member_function_template(double)>::type, cv_overload_check<const volatile double> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<result_of_member_function_template(int &, int)>::type, int &>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<result_of_member_function_template(int const &, int)>::type, int const &>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<result_of_member_function_template(int volatile &, int)>::type, int volatile &>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<result_of_member_function_template(int const volatile &, int)>::type, int const volatile &>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<result_of_member_function_template(double)>::type, double>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<const result_of_member_function_template(double)>::type, cv_overload_check<const double> >::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<volatile result_of_member_function_template(double)>::type, cv_overload_check<volatile double> >::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<const volatile result_of_member_function_template(double)>::type, cv_overload_check<const volatile double> >::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<result_of_member_function_template(int &, int)>::type, int &>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<result_of_member_function_template(int const &, int)>::type, int const &>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<result_of_member_function_template(int volatile &, int)>::type, int volatile &>::value));
- BOOST_STATIC_ASSERT((is_same<tr1_result_of<result_of_member_function_template(int const volatile &, int)>::type, int const volatile &>::value));
- typedef int (*pf_t)(int);
- BOOST_STATIC_ASSERT((is_same<result_of<pf_t(int)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<pf_t const(int)>::type,int>::value));
- 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) || 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));
- BOOST_STATIC_ASSERT((is_same<result_of<const volatile no_result_type_or_result(double)>::type, cv_overload_check<const volatile short> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result(void)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const no_result_type_or_result(void)>::type, cv_overload_check<const int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile no_result_type_or_result(void)>::type, cv_overload_check<volatile int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const volatile no_result_type_or_result(void)>::type, cv_overload_check<const volatile int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result_template<void>(double)>::type, short>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const no_result_type_or_result_template<void>(double)>::type, cv_overload_check<const short> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile no_result_type_or_result_template<void>(double)>::type, cv_overload_check<volatile short> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const volatile no_result_type_or_result_template<void>(double)>::type, cv_overload_check<const volatile short> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result_template<void>(void)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const no_result_type_or_result_template<void>(void)>::type, cv_overload_check<const int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<volatile no_result_type_or_result_template<void>(void)>::type, cv_overload_check<volatile int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<const volatile no_result_type_or_result_template<void>(void)>::type, cv_overload_check<const volatile int> >::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ptr&(char, float)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<func_ptr const&(char, 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_of const&(double)>::type, int>::value));
- #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result(int&&)>::type, short>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result(int&)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result(int const&)>::type, long>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result_template<void>(int&&)>::type, short>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result_template<void>(int&)>::type, int>::value));
- BOOST_STATIC_ASSERT((is_same<result_of<no_result_type_or_result_template<void>(int const&)>::type, long>::value));
- #endif
- #endif
- #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) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
- return 0;
- }
|