comparison DEPENDENCIES/generic/include/boost/spirit/home/support/string_traits.hpp @ 16:2665513ce2d3

Add boost headers

+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 2001-2011 Hartmut Kaiser
+    Copyright (c)      2010 Bryce Lelbach
+
+    Distributed under 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)
+================================================_==============================*/
+#if !defined(BOOST_SPIRIT_STRING_TRAITS_OCTOBER_2008_1252PM)
+#define BOOST_SPIRIT_STRING_TRAITS_OCTOBER_2008_1252PM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/support/container.hpp>
+#include <string>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/proto/proto_fwd.hpp>
+#include <boost/type_traits/is_const.hpp>
+#if defined(__GNUC__) && (__GNUC__ < 4)
+#include <boost/type_traits/add_const.hpp>
+#endif
+
+namespace boost { namespace spirit { namespace traits
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Determine if T is a character type
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T>
+    struct is_char : mpl::false_ {};
+
+    template <typename T>
+    struct is_char<T const> : is_char<T> {};
+
+    template <>
+    struct is_char<char> : mpl::true_ {};
+
+    template <>
+    struct is_char<wchar_t> : mpl::true_ {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Determine if T is a string
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T>
+    struct is_string : mpl::false_ {};
+
+    template <typename T>
+    struct is_string<T const> : is_string<T> {};
+
+    template <>
+    struct is_string<char const*> : mpl::true_ {};
+
+    template <>
+    struct is_string<wchar_t const*> : mpl::true_ {};
+
+    template <>
+    struct is_string<char*> : mpl::true_ {};
+
+    template <>
+    struct is_string<wchar_t*> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<char[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<wchar_t[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<char const[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<wchar_t const[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<char(&)[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<wchar_t(&)[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<char const(&)[N]> : mpl::true_ {};
+
+    template <std::size_t N>
+    struct is_string<wchar_t const(&)[N]> : mpl::true_ {};
+
+    template <typename T, typename Traits, typename Allocator>
+    struct is_string<std::basic_string<T, Traits, Allocator> > : mpl::true_ {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Get the underlying char type of a string
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T>
+    struct char_type_of;
+
+    template <typename T>
+    struct char_type_of<T const> : char_type_of<T> {};
+
+    template <>
+    struct char_type_of<char> : mpl::identity<char> {};
+
+    template <>
+    struct char_type_of<wchar_t> : mpl::identity<wchar_t> {};
+
+    template <>
+    struct char_type_of<char const*> : mpl::identity<char const> {};
+
+    template <>
+    struct char_type_of<wchar_t const*> : mpl::identity<wchar_t const> {};
+
+    template <>
+    struct char_type_of<char*> : mpl::identity<char> {};
+
+    template <>
+    struct char_type_of<wchar_t*> : mpl::identity<wchar_t> {};
+
+    template <std::size_t N>
+    struct char_type_of<char[N]> : mpl::identity<char> {};
+
+    template <std::size_t N>
+    struct char_type_of<wchar_t[N]> : mpl::identity<wchar_t> {};
+
+    template <std::size_t N>
+    struct char_type_of<char const[N]> : mpl::identity<char const> {};
+
+    template <std::size_t N>
+    struct char_type_of<wchar_t const[N]> : mpl::identity<wchar_t const> {};
+
+    template <std::size_t N>
+    struct char_type_of<char(&)[N]> : mpl::identity<char> {};
+
+    template <std::size_t N>
+    struct char_type_of<wchar_t(&)[N]> : mpl::identity<wchar_t> {};
+
+    template <std::size_t N>
+    struct char_type_of<char const(&)[N]> : mpl::identity<char const> {};
+
+    template <std::size_t N>
+    struct char_type_of<wchar_t const(&)[N]> : mpl::identity<wchar_t const> {};
+
+    template <typename T, typename Traits, typename Allocator>
+    struct char_type_of<std::basic_string<T, Traits, Allocator> >
+      : mpl::identity<T> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Get the C string from a string
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename String>
+    struct extract_c_string;
+
+    template <typename String>
+    struct extract_c_string
+    {
+        typedef typename char_type_of<String>::type char_type;
+
+        template <typename T>
+        static T const* call (T* str)
+        {
+            return (T const*)str; 
+        }
+
+        template <typename T>
+        static T const* call (T const* str)
+        {
+            return str; 
+        }
+    }; 
+    
+    // Forwarder that strips const
+    template <typename T>
+    struct extract_c_string<T const>
+    {
+        typedef typename extract_c_string<T>::char_type char_type;
+
+        static typename extract_c_string<T>::char_type const* call (T const str)
+        {
+            return extract_c_string<T>::call(str);
+        }
+    };
+
+    // Forwarder that strips references
+    template <typename T>
+    struct extract_c_string<T&>
+    {
+        typedef typename extract_c_string<T>::char_type char_type;
+
+        static typename extract_c_string<T>::char_type const* call (T& str)
+        {
+            return extract_c_string<T>::call(str);
+        }
+    };
+
+    // Forwarder that strips const references
+    template <typename T>
+    struct extract_c_string<T const&>
+    {
+        typedef typename extract_c_string<T>::char_type char_type;
+
+        static typename extract_c_string<T>::char_type const* call (T const& str)
+        {
+            return extract_c_string<T>::call(str);
+        }
+    };
+
+    template <typename T, typename Traits, typename Allocator>
+    struct extract_c_string<std::basic_string<T, Traits, Allocator> >
+    {
+        typedef T char_type;
+
+        typedef std::basic_string<T, Traits, Allocator> string;
+
+        static T const* call (string const& str)
+        {
+            return str.c_str();
+        }
+    };
+    
+    template <typename T>
+    typename extract_c_string<T*>::char_type const*
+    get_c_string (T* str)
+    {
+        return extract_c_string<T*>::call(str);
+    }
+
+    template <typename T>
+    typename extract_c_string<T const*>::char_type const*
+    get_c_string (T const* str)
+    {
+        return extract_c_string<T const*>::call(str);
+    }
+    
+    template <typename String>
+    typename extract_c_string<String>::char_type const*
+    get_c_string (String& str)
+    {
+        return extract_c_string<String>::call(str);
+    }
+
+    template <typename String>
+    typename extract_c_string<String>::char_type const*
+    get_c_string (String const& str)
+    {
+        return extract_c_string<String>::call(str);
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Get the begin/end iterators from a string
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Implementation for C-style strings.
+
+// gcc 3.x.x has problems resolving ambiguities here
+#if defined(__GNUC__) && (__GNUC__ < 4)
+    template <typename T>
+    inline typename add_const<T>::type * get_begin(T* str) { return str; }
+
+    template <typename T>
+    inline typename add_const<T>::type* get_end(T* str)
+    {
+        T* last = str;
+        while (*last)
+            last++;
+        return last;
+    }
+#else
+    template <typename T>
+    inline T const* get_begin(T const* str) { return str; }
+
+    template <typename T>
+    inline T* get_begin(T* str) { return str; }
+
+    template <typename T>
+    inline T const* get_end(T const* str)
+    {
+        T const* last = str;
+        while (*last)
+            last++;
+        return last;
+    }
+
+    template <typename T>
+    inline T* get_end(T* str)
+    {
+        T* last = str;
+        while (*last)
+            last++;
+        return last;
+    }
+#endif
+
+    // Implementation for containers (includes basic_string).
+    template <typename T, typename Str>
+    inline typename Str::const_iterator get_begin(Str const& str)
+    { return str.begin(); }
+
+    template <typename T, typename Str>
+    inline typename Str::iterator
+    get_begin(Str& str BOOST_PROTO_DISABLE_IF_IS_CONST(Str))
+    { return str.begin(); }
+
+    template <typename T, typename Str>
+    inline typename Str::const_iterator get_end(Str const& str)
+    { return str.end(); }
+
+    template <typename T, typename Str>
+    inline typename Str::iterator
+    get_end(Str& str BOOST_PROTO_DISABLE_IF_IS_CONST(Str))
+    { return str.end(); }
+
+    // Default implementation for other types: try a C-style string
+    // conversion.
+    // These overloads are explicitly disabled for containers,
+    // as they would be ambiguous with the previous ones.
+    template <typename T, typename Str>
+    inline typename disable_if<is_container<Str>
+      , T const*>::type get_begin(Str const& str)
+    { return str; }
+
+    template <typename T, typename Str>
+    inline typename disable_if<is_container<Str>
+      , T const*>::type get_end(Str const& str)
+    { return get_end(get_begin<T>(str)); }
+}
+
+namespace result_of
+{
+    template <typename Char, typename T, typename Enable = void>
+    struct get_begin
+    {
+        typedef typename traits::char_type_of<T>::type char_type;
+
+        typedef typename mpl::if_<
+            is_const<char_type>
+          , char_type const 
+          , char_type
+        >::type* type;
+    };
+
+    template <typename Char, typename Str>
+    struct get_begin<Char, Str
+      , typename enable_if<traits::is_container<Str> >::type>
+    {
+        typedef typename mpl::if_<
+            is_const<Str>
+          , typename Str::const_iterator
+          , typename Str::iterator
+        >::type type;
+    };
+
+    template <typename Char, typename T>
+    struct get_end : get_begin<Char, T> {};
+}
+
+}}
+
+#endif