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util/SpanCast: rewrite ToStringView(std::span<std::byte>) to avoid cast ambiguities

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This commit is contained in:
Max Kellermann 2024-04-08 21:07:34 +02:00 committed by Max Kellermann
parent e131f22642
commit 2f7c19f139
1 changed files with 12 additions and 6 deletions
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18
src/util/SpanCast.hxx
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@ -89,15 +89,21 @@ ToStringView(std::span<const std::byte> s) noexcept
return ToStringView(FromBytesStrict<const char>(s)); return ToStringView(FromBytesStrict<const char>(s));
} }
constexpr std::string_view
ToStringView(std::span<std::byte> s) noexcept
{
return ToStringView(FromBytesStrict<const char>(s));
}
template<typename T> template<typename T>
constexpr std::basic_string_view<std::remove_const_t<T>> constexpr std::basic_string_view<std::remove_const_t<T>>
ToStringView(std::span<T> s) noexcept ToStringView(std::span<T> s) noexcept
{ {
return {s.data(), s.size()}; return {s.data(), s.size()};
} }
/* this overload matches std::span<std::byte> (without "const") and is
written that way to avoid ambiguities when passing an object that
has cast operators for both std::span<std::byte> and
std::span<const std::byte> */
template<typename T>
constexpr std::string_view
ToStringView(std::span<T> s) noexcept
requires(std::is_same_v<std::remove_const_t<T>, std::byte>)
{
return ToStringView(FromBytesStrict<const char>(s));
}