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+// (C) Copyright Gennadiy Rozental 2011-2014.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/test for the library home page.
+//
+// File : $RCSfile$
+//
+// Version : $Revision: 74248 $
+//
+// Description : defines level of indiration facilitating workarounds for non printable types
+// ***************************************************************************
+
+#ifndef BOOST_TEST_TOOLS_IMPL_COMMON_HPP_012705GER
+#define BOOST_TEST_TOOLS_IMPL_COMMON_HPP_012705GER
+
+// Boost.Test
+#include <boost/test/detail/config.hpp>
+#include <boost/test/detail/global_typedef.hpp>
+#include <boost/test/detail/workaround.hpp>
+
+// Boost
+#include <boost/mpl/or.hpp>
+#include <boost/type_traits/is_array.hpp>
+#include <boost/type_traits/is_function.hpp>
+#include <boost/type_traits/is_abstract.hpp>
+#include <limits>
+
+#include <boost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace boost {
+namespace test_tools {
+namespace tt_detail {
+
+// ************************************************************************** //
+// ************** print_log_value ************** //
+// ************************************************************************** //
+
+template<typename T>
+struct print_log_value {
+ void operator()( std::ostream& ostr, T const& t )
+ {
+ typedef typename mpl::or_<is_array<T>,is_function<T>,is_abstract<T> >::type cant_use_nl;
+
+ std::streamsize old_precision = set_precision( ostr, cant_use_nl() );
+
+ ostr << t;
+
+ if( old_precision != (std::streamsize)-1 )
+ ostr.precision( old_precision );
+ }
+
+ std::streamsize set_precision( std::ostream& ostr, mpl::false_ )
+ {
+ if( std::numeric_limits<T>::is_specialized && std::numeric_limits<T>::radix == 2 )
+ return ostr.precision( 2 + std::numeric_limits<T>::digits * 301/1000 );
+ else if ( std::numeric_limits<T>::is_specialized && std::numeric_limits<T>::radix == 10 ) {
+#ifdef BOOST_NO_CXX11_NUMERIC_LIMITS
+ // (was BOOST_NO_NUMERIC_LIMITS_LOWEST but now deprecated).
+ // No support for std::numeric_limits<double>::max_digits10,
+ // so guess that a couple of guard digits more than digits10 will display any difference.
+ return ostr.precision( 2 + std::numeric_limits<T>::digits10 );
+#else
+ // std::numeric_limits<double>::max_digits10; IS supported.
+ // Any noisy or guard digits needed to display any difference are included in max_digits10.
+ return ostr.precision( std::numeric_limits<T>::max_digits10 );
+#endif
+ }
+ // else if T is not specialized for std::numeric_limits<>,
+ // then will just get the default precision of 6 digits.
+ return (std::streamsize)-1;
+ }
+
+ std::streamsize set_precision( std::ostream&, mpl::true_ ) { return (std::streamsize)-1; }
+};
+
+//____________________________________________________________________________//
+
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+template<typename T, std::size_t N >
+struct print_log_value< T[N] > {
+ void operator()( std::ostream& ostr, T const* t )
+ {
+ ostr << t;
+ }
+};
+#endif
+
+//____________________________________________________________________________//
+
+template<>
+struct BOOST_TEST_DECL print_log_value<bool> {
+ void operator()( std::ostream& ostr, bool t )
+ {
+ ostr << std::boolalpha << t;
+ }
+};
+
+//____________________________________________________________________________//
+
+template<>
+struct BOOST_TEST_DECL print_log_value<char> {
+ void operator()( std::ostream& ostr, char t );
+};
+
+//____________________________________________________________________________//
+
+template<>
+struct BOOST_TEST_DECL print_log_value<unsigned char> {
+ void operator()( std::ostream& ostr, unsigned char t );
+};
+
+//____________________________________________________________________________//
+
+template<>
+struct BOOST_TEST_DECL print_log_value<char const*> {
+ void operator()( std::ostream& ostr, char const* t );
+};
+
+//____________________________________________________________________________//
+
+template<>
+struct BOOST_TEST_DECL print_log_value<wchar_t const*> {
+ void operator()( std::ostream& ostr, wchar_t const* t );
+};
+
+//____________________________________________________________________________//
+
+// ************************************************************************** //
+// ************** print_helper ************** //
+// ************************************************************************** //
+// Adds level of indirection to the output operation, allowing us to customize
+// it for types that do not support operator << directly or for any other reason
+
+template<typename T>
+struct print_helper_t {
+ explicit print_helper_t( T const& t ) : m_t( t ) {}
+
+ T const& m_t;
+};
+
+//____________________________________________________________________________//
+
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+// Borland suffers premature pointer decay passing arrays by reference
+template<typename T, std::size_t N >
+struct print_helper_t< T[N] > {
+ explicit print_helper_t( T const * t ) : m_t( t ) {}
+
+ T const * m_t;
+};
+#endif
+
+//____________________________________________________________________________//
+
+template<typename T>
+inline print_helper_t<T>
+print_helper( T const& t )
+{
+ return print_helper_t<T>( t );
+}
+
+//____________________________________________________________________________//
+
+template<typename T>
+inline std::ostream&
+operator<<( std::ostream& ostr, print_helper_t<T> const& ph )
+{
+ print_log_value<T>()( ostr, ph.m_t );
+
+ return ostr;
+}
+
+//____________________________________________________________________________//
+
+} // namespace tt_detail
+
+// ************************************************************************** //
+// ************** BOOST_TEST_DONT_PRINT_LOG_VALUE ************** //
+// ************************************************************************** //
+
+#define BOOST_TEST_DONT_PRINT_LOG_VALUE( the_type ) \
+namespace boost{ namespace test_tools{ namespace tt_detail{ \
+template<> \
+struct print_log_value<the_type > { \
+ void operator()( std::ostream&, the_type const& ) {} \
+}; \
+}}} \
+/**/
+
+} // namespace test_tools
+} // namespace boost
+
+#include <boost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_TOOLS_IMPL_COMMON_HPP_012705GER