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explicit_operator_bool: under g++ 4.6 the operator can't be constexpr

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This commit is contained in:
Peter Dimov
2018-08-07 22:59:25 +03:00
parent 70413b0568
commit b7ad896707
1 changed files with 9 additions and 0 deletions
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9
include/boost/core/explicit_operator_bool.hpp
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@ -19,6 +19,7 @@
#define BOOST_CORE_EXPLICIT_OPERATOR_BOOL_HPP
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
@ -121,12 +122,20 @@ namespace detail {
return (!this->operator! () ? &boost::detail::unspecified_bool::true_value : (boost::detail::unspecified_bool_type)0);\
}
#if BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40700)
#define BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL() BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT()
#else
#define BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL()\
BOOST_FORCEINLINE BOOST_CONSTEXPR operator boost::detail::unspecified_bool_type () const BOOST_NOEXCEPT\
{\
return (!this->operator! () ? &boost::detail::unspecified_bool::true_value : (boost::detail::unspecified_bool_type)0);\
}
#endif
#else // !defined(BOOST_NO_UNSPECIFIED_BOOL)
#define BOOST_EXPLICIT_OPERATOR_BOOL()\