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fix: (vs2015) call does not result in a constant expression

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mutouyun 2023-05-28 12:47:38 +08:00
parent e200c49f24
commit f2ae0f5a3a
1 changed files with 3 additions and 3 deletions
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6
include/libconcur/concurrent.h
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@ -457,14 +457,14 @@ struct prod_cons : producer<TransModT, ProdModT>
, traits<consumer<TransModT, ConsModT>>::header { , traits<consumer<TransModT, ConsModT>>::header {
index_t const circ_size; index_t const circ_size;
constexpr header(index_t cs) noexcept header(index_t cs) noexcept
: circ_size(cs) {} : circ_size(cs) {}
template <typename T> template <typename T>
constexpr header(::LIBIMP::span<element<T>> const &elems) noexcept header(::LIBIMP::span<element<T>> const &elems) noexcept
: circ_size(static_cast<index_t>(elems.size())) {} : circ_size(static_cast<index_t>(elems.size())) {}
constexpr bool valid() const noexcept { bool valid() const noexcept {
// circ_size must be a power of two. // circ_size must be a power of two.
return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0); return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
} }