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Define own placeholders to avoid lookup problems

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This commit is contained in:
Peter Dimov 2021-06-27 04:04:29 +03:00
parent 82820de89d
commit b65381daef
1 changed files with 34 additions and 2 deletions
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36
include/boost/lambda2/lambda2.hpp
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@ -18,6 +18,40 @@ namespace boost
namespace lambda2 namespace lambda2
{ {
template<int I> struct lambda2_arg
{
};
#if defined(__cpp_inline_variables) && __cpp_inline_variables >= 201606L
# define BOOST_LAMBDA2_INLINE_VAR inline
#else
# define BOOST_LAMBDA2_INLINE_VAR
#endif
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<1> _1;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<2> _2;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<3> _3;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<4> _4;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<5> _5;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<6> _6;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<7> _7;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<8> _8;
BOOST_LAMBDA2_INLINE_VAR constexpr lambda2_arg<9> _9;
#undef BOOST_LAMBDA2_INLINE_VAR
} // namespace lambda2
} // namespace boost
template<int I> struct std::is_placeholder< boost::lambda2::lambda2_arg<I> >: std::integral_constant<int, I>
{
};
namespace boost
{
namespace lambda2
{
namespace lambda2_detail namespace lambda2_detail
{ {
@ -71,8 +105,6 @@ BOOST_LAMBDA2_BINARY_LAMBDA(|, std::bit_or<>)
BOOST_LAMBDA2_BINARY_LAMBDA(^, std::bit_xor<>) BOOST_LAMBDA2_BINARY_LAMBDA(^, std::bit_xor<>)
BOOST_LAMBDA2_UNARY_LAMBDA(~, std::bit_not<>) BOOST_LAMBDA2_UNARY_LAMBDA(~, std::bit_not<>)
using namespace std::placeholders;
} // namespace lambda2 } // namespace lambda2
} // namespace boost } // namespace boost