/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Copyright (c) 2001-2011 Hartmut Kaiser
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Copyright (c) 2010 Bryce Lelbach
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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================================================_==============================*/
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#if !defined(BOOST_SPIRIT_X3_STRING_TRAITS_OCTOBER_2008_1252PM)
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#define BOOST_SPIRIT_X3_STRING_TRAITS_OCTOBER_2008_1252PM
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#include <string>
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#include <boost/mpl/bool.hpp>
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namespace boost { namespace spirit { namespace x3 { namespace traits
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{
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///////////////////////////////////////////////////////////////////////////
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// Get the C string from a string
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///////////////////////////////////////////////////////////////////////////
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template <typename String>
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struct extract_c_string;
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template <typename String>
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struct extract_c_string
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{
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template <typename T>
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static T const* call (T* str)
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{
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return (T const*)str;
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}
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template <typename T>
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static T const* call (T const* str)
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{
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return str;
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}
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};
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// Forwarder that strips const
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template <typename T>
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struct extract_c_string<T const>
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{
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static decltype(auto) call(T const str)
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{
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return extract_c_string<T>::call(str);
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}
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};
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// Forwarder that strips references
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template <typename T>
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struct extract_c_string<T&>
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{
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static decltype(auto) call(T& str)
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{
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return extract_c_string<T>::call(str);
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}
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};
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// Forwarder that strips const references
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template <typename T>
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struct extract_c_string<T const&>
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{
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static decltype(auto) call(T const& str)
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{
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return extract_c_string<T>::call(str);
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}
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};
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template <typename T, typename Traits, typename Allocator>
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struct extract_c_string<std::basic_string<T, Traits, Allocator> >
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{
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typedef std::basic_string<T, Traits, Allocator> string;
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static T const* call (string const& str)
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{
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return str.c_str();
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}
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};
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template <typename T>
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decltype(auto) get_c_string(T* str)
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{
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return extract_c_string<T*>::call(str);
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}
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template <typename T>
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decltype(auto) get_c_string(T const* str)
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{
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return extract_c_string<T const*>::call(str);
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}
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template <typename String>
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decltype(auto) get_c_string(String& str)
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{
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return extract_c_string<String>::call(str);
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}
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template <typename String>
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decltype(auto) get_c_string(String const& str)
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{
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return extract_c_string<String>::call(str);
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}
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///////////////////////////////////////////////////////////////////////////
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// Get the begin/end iterators from a string
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///////////////////////////////////////////////////////////////////////////
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// Implementation for C-style strings.
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template <typename T>
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inline T const* get_string_begin(T const* str) { return str; }
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template <typename T>
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inline T* get_string_begin(T* str) { return str; }
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template <typename T>
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inline T const* get_string_end(T const* str)
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{
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T const* last = str;
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while (*last)
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last++;
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return last;
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}
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template <typename T>
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inline T* get_string_end(T* str)
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{
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T* last = str;
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while (*last)
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last++;
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return last;
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}
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// Implementation for containers (includes basic_string).
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template <typename T, typename Str>
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inline typename Str::const_iterator get_string_begin(Str const& str)
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{ return str.begin(); }
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template <typename T, typename Str>
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inline typename Str::iterator
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get_string_begin(Str& str)
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{ return str.begin(); }
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template <typename T, typename Str>
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inline typename Str::const_iterator get_string_end(Str const& str)
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{ return str.end(); }
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template <typename T, typename Str>
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inline typename Str::iterator
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get_string_end(Str& str)
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{ return str.end(); }
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}}}}
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#endif
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