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there seems to be no reasonable form which avoids warnings with all compilers; so let's use a clear style and filter explicitly the VC warning

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[SVN r34820]
This commit is contained in:
Gennaro Prota
2006-08-05 22:45:53 +00:00
parent c5bc634015
commit 795b7e1809
1 changed files with 10 additions and 9 deletions
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19
include/boost/lexical_cast.hpp
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@@ -136,20 +136,21 @@ namespace boost
{
stream.unsetf(std::ios::skipws);
// The odd style used below is to avoid spurious compiler
// warnings about using is_specialized as a (constant)
// conditional expression
#if (defined _MSC_VER)
# pragma warning( push )
// conditional expression is constant
# pragma warning( disable : 4127 )
typedef std::numeric_limits<Target> t;
typedef std::numeric_limits<Source> s;
bool setup_target = t::is_specialized;
if (setup_target)
stream.precision(t::digits10 + 1);
else
((s::is_specialized) &&
stream.precision(s::digits10 + 1));
if(t::is_specialized)
stream.precision(1 + t::digits10);
else if(s::is_specialized)
stream.precision(1 + s::digits10);
# pragma warning( pop )
#endif
}
~lexical_stream()