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to_string fixes

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[SVN r44164]
This commit is contained in:
Emil Dotchevski
2008-04-11 03:51:06 +00:00
parent 65d278a387
commit 3c7f53176f
8 changed files with 290 additions and 121 deletions
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58
include/boost/exception/to_string_stub.hpp
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@ -13,53 +13,6 @@
namespace
boost
{
namespace
exception_detail
{
template <bool ShiftLeftAvailable>
struct shift_left_dispatcher;
template <>
struct
shift_left_dispatcher<true>
{
template <class T,class CharT,class Traits,class Stub>
static
void
convert( std::basic_ostream<CharT,Traits> & out, T const & x, Stub )
{
out << x;
}
};
template <>
struct
shift_left_dispatcher<false>
{
template <class T,class CharT,class Traits,class Stub>
static
void
convert( std::basic_ostream<CharT,Traits> & out, T const & x, Stub s )
{
out << s(x);
}
};
namespace
shift_left_dispatch
{
template <class T,class CharT,class Traits>
char operator<<( std::basic_ostream<CharT,Traits> &, T );
template <class T,class CharT,class Traits,class Stub>
void
dispatch( std::basic_ostream<CharT,Traits> & out, T const & x, Stub s )
{
shift_left_dispatcher<1!=sizeof(out<<x)>::convert(out,x,s);
}
}
}
namespace
exception_detail
{
@ -82,26 +35,21 @@ boost
{
template <class T,class Stub>
static
std::string
std::string
convert( T const & x, Stub s )
{
std::ostringstream out;
shift_left_dispatch::dispatch(out,x,s);
return out.str();
return s(x);
}
};
namespace
to_string_dispatch
{
template <class T>
char to_string( T );
template <class T,class Stub>
std::string
dispatch( T const & x, Stub s )
{
return to_string_dispatcher<1!=sizeof(to_string(x))>::convert(x,s);
return to_string_dispatcher<has_to_string<T>::value>::convert(x,s);
}
}