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MSVC/numeric_cast workaround

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[SVN r25314]
This commit is contained in:
Aleksey Gurtovoy
2004-09-21 15:02:09 +00:00
parent e58c07109f
commit f133ea0b9f
2 changed files with 16 additions and 4 deletions
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18
include/boost/mpl/numeric_cast.hpp
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@@ -15,12 +15,24 @@
// $Revision$
#include <boost/mpl/apply_wrap.hpp>
#include <boost/mpl/aux_/config/msvc.hpp>
#include <boost/mpl/aux_/config/workaround.hpp>
// agurt 21/sep/04: portability macro for the sake of MSVC 6.x-7.0;
// resolves conflicts with 'boost::numeric_cast' function template.
// use it in your own code _only_ if you care about compatibility with
// these outdated compilers!
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
# define BOOST_MPL_AUX_NUMERIC_CAST numeric_cast_
#else
# define BOOST_MPL_AUX_NUMERIC_CAST numeric_cast
#endif
namespace boost { namespace mpl {
// no default implementation; the definition is needed to make MSVC happy
template< typename SourceTag, typename TargetTag > struct numeric_cast
template< typename SourceTag, typename TargetTag > struct BOOST_MPL_AUX_NUMERIC_CAST
{
template< typename N > struct apply;
};
@@ -38,7 +50,7 @@ struct cast1st_impl
template< typename N1, typename N2 > struct apply
: apply_wrap2<
F
, typename apply_wrap1< numeric_cast<Tag1,Tag2>,N1 >::type
, typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type
, N2
>
{
@@ -56,7 +68,7 @@ struct cast2nd_impl
: apply_wrap2<
F
, N1
, typename apply_wrap1< numeric_cast<Tag2,Tag1>,N2 >::type
, typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type
>
{
};

2
test/numeric_ops.cpp
View File

@@ -33,7 +33,7 @@ template< typename C > struct imag : C::imag {};
namespace boost { namespace mpl {
template<> struct numeric_cast< integral_c_tag,complex_tag >
template<> struct BOOST_MPL_AUX_NUMERIC_CAST< integral_c_tag,complex_tag >
{
template< typename N > struct apply
: complex< N, integral_c< typename N::value_type, 0 > >