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Topic/gh 323 lazy ostream check printable sooner #336

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ea45295
Check that lazy_ostream argument is printable
ecatmur Jan 18, 2022
d3a47fe
Change log
raffienficiaud Mar 7, 2022
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1 change: 1 addition & 0 deletions doc/closing_chapters/change_log.qbk
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ Boost.Test releases:
# [pull_request 275] Replace anonymous `enum` arity with `static constexpr`
# [pull_request 278] Use `boost_test_print_type` customization point in `lazy_ostream`
# [pull_request 281] Export `execution_aborted` exception to allow catching it from outside the DLL
# [pull_request 323] Check that `lazy_ostream` argument is printable

[#ref_CHANGE_LOG_3_14][h4 Boost.Test v3.14 / boost 1.74]

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6 changes: 6 additions & 0 deletions include/boost/test/utils/lazy_ostream.hpp
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Expand Up @@ -15,6 +15,10 @@
#include <boost/test/detail/config.hpp>
#include <boost/test/tools/detail/print_helper.hpp>

// Boost
#include <boost/static_assert.hpp>
#include <boost/type_traits/has_left_shift.hpp>

// STL
#include <iosfwd>

Expand Down Expand Up @@ -75,6 +79,8 @@ class lazy_ostream_impl : public lazy_ostream {
, m_prev( prev )
, m_value( value )
{
BOOST_STATIC_ASSERT_MSG( (boost::has_left_shift<std::ostream,T>::value),
"Type has to implement operator<< to be printable");
}

std::ostream& operator()( std::ostream& ostr ) const BOOST_OVERRIDE
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