Subject: [Boost-commit] svn:boost r85072 - in trunk: boost libs/conversion/test
From: antoshkka_at_[hidden]
Date: 2013-07-18 04:45:09
Author: apolukhin
Date: 2013-07-18 04:45:09 EDT (Thu, 18 Jul 2013)
New Revision: 85072
URL: http://svn.boost.org/trac/boost/changeset/85072
Log:
Fixed testing of 128bit integer types and added staic assert that cheks for std::numeric_limits specializations, if they are required for conversion (refs #8790)
Text files modified:
trunk/boost/lexical_cast.hpp | 9 +++++++++
trunk/libs/conversion/test/lexical_cast_integral_types_test.cpp | 23 +++++++++++++++++++++--
2 files changed, 30 insertions(+), 2 deletions(-)
Modified: trunk/boost/lexical_cast.hpp
==============================================================================
--- trunk/boost/lexical_cast.hpp Wed Jul 17 18:14:12 2013 (r85071)
+++ trunk/boost/lexical_cast.hpp 2013-07-18 04:45:09 EDT (Thu, 18 Jul 2013) (r85072)
@@ -879,6 +879,15 @@
{
#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
+
+ // GCC when used with flag -std=c++0x may not have std::numeric_limits
+ // specializations for __int128 and unsigned __int128 types.
+ // Try compilation with -std=gnu++0x or -std=gnu++11.
+ //
+ // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40856
+ BOOST_STATIC_ASSERT_MSG(std::numeric_limits<T>::is_specialized,
+ "std::numeric_limits are not specialized for integral type passed to boost::lexical_cast"
+ );
#endif
CharT const czero = lcast_char_constants<CharT>::zero;
--end;
Modified: trunk/libs/conversion/test/lexical_cast_integral_types_test.cpp
==============================================================================
--- trunk/libs/conversion/test/lexical_cast_integral_types_test.cpp Wed Jul 17 18:14:12 2013 (r85071)
+++ trunk/libs/conversion/test/lexical_cast_integral_types_test.cpp 2013-07-18 04:45:09 EDT (Thu, 18 Jul 2013) (r85072)
@@ -558,14 +558,33 @@
#ifdef BOOST_LCAST_HAS_INT128
+
+template <bool Specialized, class T>
+struct test_if_specialized {
+ static void test() {}
+};
+
+template <class T>
+struct test_if_specialized<true, T> {
+ static void test() {
+ test_conversion_from_to_integral_minimal<T>();
+ }
+};
+
void test_conversion_from_to_int128()
{
- test_conversion_from_to_integral_minimal<boost::int128_type>();
+ test_if_specialized<
+ std::numeric_limits<boost::int128_type>::is_specialized,
+ boost::int128_type
+ >::test();
}
void test_conversion_from_to_uint128()
{
- test_conversion_from_to_integral_minimal<boost::uint128_type>();
+ test_if_specialized<
+ std::numeric_limits<boost::int128_type>::is_specialized,
+ boost::uint128_type
+ >::test();
}
#endif