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Performance optimizations and testsfor conversions to/from boost::container::basic_string

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[SVN r74940]
This commit is contained in:
Antony Polukhin
2011-10-13 18:36:39 +00:00
parent 8c7c7b9237
commit c07cbcee5c
3 changed files with 102 additions and 0 deletions
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include/boost/lexical_cast.hpp
+63
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@@ -46,6 +46,7 @@
#include <boost/static_assert.hpp>
#include <boost/detail/lcast_precision.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/container/container_fwd.hpp>
#include <cwchar>
@@ -145,6 +146,12 @@ namespace boost
{
typedef CharT type;
};
template<class CharT, class Traits, class Alloc>
struct stream_char< ::boost::container::basic_string<CharT,Traits,Alloc> >
{
typedef CharT type;
};
#endif
#ifndef BOOST_LCAST_NO_WCHAR_T
@@ -259,6 +266,24 @@ namespace boost
typedef Traits type;
};
template<class CharT, class Traits, class Alloc, class Source>
struct deduce_char_traits< CharT
, ::boost::container::basic_string<CharT,Traits,Alloc>
, Source
>
{
typedef Traits type;
};
template<class CharT, class Target, class Traits, class Alloc>
struct deduce_char_traits< CharT
, Target
, ::boost::container::basic_string<CharT,Traits,Alloc>
>
{
typedef Traits type;
};
template<class CharT, class Traits, class Alloc1, class Alloc2>
struct deduce_char_traits< CharT
, std::basic_string<CharT,Traits,Alloc1>
@@ -267,6 +292,15 @@ namespace boost
{
typedef Traits type;
};
template<class CharT, class Traits, class Alloc1, class Alloc2>
struct deduce_char_traits< CharT
, ::boost::container::basic_string<CharT,Traits,Alloc1>
, ::boost::container::basic_string<CharT,Traits,Alloc2>
>
{
typedef Traits type;
};
#endif
}
@@ -1257,6 +1291,14 @@ namespace boost
return true;
}
template<class Alloc>
bool operator<<(::boost::container::basic_string<CharT,Traits,Alloc> const& str)
{
start = const_cast<CharT*>(str.data());
finish = start + str.length();
return true;
}
bool operator<<(bool value)
{
CharT const czero = lcast_char_constants<CharT>::zero;
@@ -1462,6 +1504,9 @@ namespace boost
#else
template<class Alloc>
bool operator>>(std::basic_string<CharT,Traits,Alloc>& str) { str.assign(start, finish); return true; }
template<class Alloc>
bool operator>>(::boost::container::basic_string<CharT,Traits,Alloc>& str) { str.assign(start, finish); return true; }
#endif
/*
* case "-0" || "0" || "+0" : output = false; return true;
@@ -1598,6 +1643,12 @@ namespace boost
BOOST_STATIC_CONSTANT(bool, value = true );
};
template<typename CharT, typename Traits, typename Alloc>
struct is_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc> >
{
BOOST_STATIC_CONSTANT(bool, value = true );
};
template<typename T>
struct is_char_or_wchar
{
@@ -1698,6 +1749,18 @@ namespace boost
BOOST_STATIC_CONSTANT(bool, value = true );
};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc>, CharT* >
{
BOOST_STATIC_CONSTANT(bool, value = true );
};
template<typename CharT, typename Traits, typename Alloc>
struct is_char_array_to_stdstring< ::boost::container::basic_string<CharT, Traits, Alloc>, const CharT* >
{
BOOST_STATIC_CONSTANT(bool, value = true );
};
#if (defined _MSC_VER)
# pragma warning( push )
# pragma warning( disable : 4701 ) // possible use of ... before initialization