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Do not use fold expressions for mp_find and mp_find_if

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This commit is contained in:
Peter Dimov
2024-12-21 21:48:37 +02:00
parent 35435bf206
commit 82533c431e
1 changed files with 2 additions and 40 deletions
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42
include/boost/mp11/algorithm.hpp
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@ -719,37 +719,7 @@ namespace detail
template<class L, class V> struct mp_find_impl;
#if BOOST_MP11_CLANG && defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS )
struct mp_index_holder
{
std::size_t i_;
bool f_;
};
constexpr inline mp_index_holder operator+( mp_index_holder const & v, bool f )
{
if( v.f_ )
{
return v;
}
else if( f )
{
return { v.i_, true };
}
else
{
return { v.i_ + 1, false };
}
}
template<template<class...> class L, class... T, class V> struct mp_find_impl<L<T...>, V>
{
static constexpr mp_index_holder _v{ 0, false };
using type = mp_size_t< (_v + ... + std::is_same<T, V>::value).i_ >;
};
#elif !defined( BOOST_MP11_NO_CONSTEXPR )
#if !defined( BOOST_MP11_NO_CONSTEXPR )
template<template<class...> class L, class V> struct mp_find_impl<L<>, V>
{
@ -828,15 +798,7 @@ namespace detail
template<class L, template<class...> class P> struct mp_find_if_impl;
#if BOOST_MP11_CLANG && defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS )
template<template<class...> class L, class... T, template<class...> class P> struct mp_find_if_impl<L<T...>, P>
{
static constexpr mp_index_holder _v{ 0, false };
using type = mp_size_t< (_v + ... + P<T>::value).i_ >;
};
#elif !defined( BOOST_MP11_NO_CONSTEXPR )
#if !defined( BOOST_MP11_NO_CONSTEXPR )
template<template<class...> class L, template<class...> class P> struct mp_find_if_impl<L<>, P>
{