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Use static const for next/prior from C++17

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Trying to form next/prior in constant evaluation may be ill-formed; see https://github.com/boostorg/mpl/issues/69
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Ed Catmur
2023-11-24 08:53:05 -07:00
parent b440c45c28
commit 8499ae7e4f
1 changed files with 2 additions and 1 deletions
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3
include/boost/mpl/aux_/integral_wrapper.hpp
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@@ -56,7 +56,8 @@ struct AUX_WRAPPER_NAME
// have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC),
// while some other don't like 'value + 1' (Borland), and some don't like
// either
#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243)
#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243) \
|| __cplusplus >= 201703L
private:
BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)));
BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)));