1 | |
---|
2 | // Copyright 2000 John Maddock (john@johnmaddock.co.uk) |
---|
3 | // Copyright 2002 Aleksey Gurtovoy (agurtovoy@meta-comm.com) |
---|
4 | // |
---|
5 | // Use, modification and distribution are subject to the Boost Software License, |
---|
6 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
---|
7 | // http://www.boost.org/LICENSE_1_0.txt). |
---|
8 | // |
---|
9 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
---|
10 | |
---|
11 | #ifndef BOOST_TT_IS_FUNCTION_HPP_INCLUDED |
---|
12 | #define BOOST_TT_IS_FUNCTION_HPP_INCLUDED |
---|
13 | |
---|
14 | #include <boost/type_traits/is_reference.hpp> |
---|
15 | #include <boost/type_traits/detail/false_result.hpp> |
---|
16 | #include <boost/config.hpp> |
---|
17 | |
---|
18 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_TT_TEST_MS_FUNC_SIGS) |
---|
19 | # include <boost/type_traits/detail/is_function_ptr_helper.hpp> |
---|
20 | #else |
---|
21 | # include <boost/type_traits/detail/is_function_ptr_tester.hpp> |
---|
22 | # include <boost/type_traits/detail/yes_no_type.hpp> |
---|
23 | #endif |
---|
24 | |
---|
25 | // should be the last #include |
---|
26 | #include <boost/type_traits/detail/bool_trait_def.hpp> |
---|
27 | |
---|
28 | // is a type a function? |
---|
29 | // Please note that this implementation is unnecessarily complex: |
---|
30 | // we could just use !is_convertible<T*, const volatile void*>::value, |
---|
31 | // except that some compilers erroneously allow conversions from |
---|
32 | // function pointers to void*. |
---|
33 | |
---|
34 | namespace boost { |
---|
35 | |
---|
36 | #if !defined( __CODEGEARC__ ) |
---|
37 | |
---|
38 | namespace detail { |
---|
39 | |
---|
40 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_TT_TEST_MS_FUNC_SIGS) |
---|
41 | template<bool is_ref = true> |
---|
42 | struct is_function_chooser |
---|
43 | : ::boost::type_traits::false_result |
---|
44 | { |
---|
45 | }; |
---|
46 | |
---|
47 | template <> |
---|
48 | struct is_function_chooser<false> |
---|
49 | { |
---|
50 | template< typename T > struct result_ |
---|
51 | : ::boost::type_traits::is_function_ptr_helper<T*> |
---|
52 | { |
---|
53 | }; |
---|
54 | }; |
---|
55 | |
---|
56 | template <typename T> |
---|
57 | struct is_function_impl |
---|
58 | : is_function_chooser< ::boost::is_reference<T>::value > |
---|
59 | ::BOOST_NESTED_TEMPLATE result_<T> |
---|
60 | { |
---|
61 | }; |
---|
62 | |
---|
63 | #else |
---|
64 | |
---|
65 | template <typename T> |
---|
66 | struct is_function_impl |
---|
67 | { |
---|
68 | #if BOOST_WORKAROUND(BOOST_MSVC_FULL_VER, >= 140050000) |
---|
69 | #pragma warning(push) |
---|
70 | #pragma warning(disable:6334) |
---|
71 | #endif |
---|
72 | static T* t; |
---|
73 | BOOST_STATIC_CONSTANT( |
---|
74 | bool, value = sizeof(::boost::type_traits::is_function_ptr_tester(t)) |
---|
75 | == sizeof(::boost::type_traits::yes_type) |
---|
76 | ); |
---|
77 | #if BOOST_WORKAROUND(BOOST_MSVC_FULL_VER, >= 140050000) |
---|
78 | #pragma warning(pop) |
---|
79 | #endif |
---|
80 | }; |
---|
81 | |
---|
82 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
---|
83 | template <typename T> |
---|
84 | struct is_function_impl<T&> : public false_type |
---|
85 | {}; |
---|
86 | #endif |
---|
87 | |
---|
88 | #endif |
---|
89 | |
---|
90 | } // namespace detail |
---|
91 | |
---|
92 | #endif // !defined( __CODEGEARC__ ) |
---|
93 | |
---|
94 | #if defined( __CODEGEARC__ ) |
---|
95 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_function,T,__is_function(T)) |
---|
96 | #else |
---|
97 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_function,T,::boost::detail::is_function_impl<T>::value) |
---|
98 | #ifndef BOOST_NO_RVALUE_REFERENCES |
---|
99 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_function,T&&,false) |
---|
100 | #endif |
---|
101 | #endif |
---|
102 | } // namespace boost |
---|
103 | |
---|
104 | #include <boost/type_traits/detail/bool_trait_undef.hpp> |
---|
105 | |
---|
106 | #endif // BOOST_TT_IS_FUNCTION_HPP_INCLUDED |
---|