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88 lines
2.1 KiB
88 lines
2.1 KiB
// Copyright David Abrahams 2002. |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef STRING_LITERAL_DWA2002629_HPP |
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# define STRING_LITERAL_DWA2002629_HPP |
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# include <cstddef> |
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# include <boost/type.hpp> |
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# include <boost/type_traits/array_traits.hpp> |
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# include <boost/type_traits/same_traits.hpp> |
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# include <boost/mpl/bool.hpp> |
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# include <boost/detail/workaround.hpp> |
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namespace boost { namespace python { namespace detail { |
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# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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template <class T> |
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struct is_string_literal : mpl::false_ |
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{ |
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}; |
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# if !defined(__MWERKS__) || __MWERKS__ > 0x2407 |
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template <std::size_t n> |
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struct is_string_literal<char const[n]> : mpl::true_ |
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{ |
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}; |
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# if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590040)) \ |
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|| (defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730) |
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// This compiler mistakenly gets the type of string literals as char* |
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// instead of char[NN]. |
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template <> |
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struct is_string_literal<char* const> : mpl::true_ |
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{ |
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}; |
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# endif |
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# else |
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// CWPro7 has trouble with the array type deduction above |
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template <class T, std::size_t n> |
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struct is_string_literal<T[n]> |
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: is_same<T, char const> |
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{ |
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}; |
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# endif |
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# else |
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template <bool is_array = true> |
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struct string_literal_helper |
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{ |
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typedef char (&yes_string_literal)[1]; |
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typedef char (&no_string_literal)[2]; |
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template <class T> |
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struct apply |
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{ |
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typedef apply<T> self; |
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static T x; |
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static yes_string_literal check(char const*); |
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static no_string_literal check(char*); |
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static no_string_literal check(void const volatile*); |
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BOOST_STATIC_CONSTANT( |
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bool, value = sizeof(self::check(x)) == sizeof(yes_string_literal)); |
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typedef mpl::bool_<value> type; |
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}; |
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}; |
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template <> |
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struct string_literal_helper<false> |
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{ |
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template <class T> |
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struct apply : mpl::false_ |
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{ |
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}; |
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}; |
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template <class T> |
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struct is_string_literal |
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: string_literal_helper<is_array<T>::value>::apply<T> |
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{ |
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}; |
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# endif |
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}}} // namespace boost::python::detail |
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#endif // STRING_LITERAL_DWA2002629_HPP
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