highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2026-06-04 10:12:28 +02:00
Code Issues Packages Projects Releases Wiki Activity

refactor: Return std::span from MakeUCharSpan

Browse Source 
This is possible and safe, because std::span can implicitly convert into
Span, if needed.
This commit is contained in:
MarcoFalke
2024-12-17 21:34:39 +01:00
parent fa720b94be
commit fadf02ef8b
2 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/span.h
View File

@@ -290,9 +290,10 @@ template <typename B>
concept BasicByte = requires { UCharCast(std::span<B>{}.data()); };
// Helper function to safely convert a Span to a Span<[const] unsigned char>.
template <typename T> constexpr auto UCharSpanCast(Span<T> s) -> Span<typename std::remove_pointer<decltype(UCharCast(s.data()))>::type> { return {UCharCast(s.data()), s.size()}; }
template <typename T, size_t N> constexpr auto UCharSpanCast(std::span<T, N> s) { return std::span<std::remove_pointer_t<decltype(UCharCast(s.data()))>, N>{UCharCast(s.data()), s.size()}; }
/** Like the Span constructor, but for (const) unsigned char member types only. Only works for (un)signed char containers. */
template <typename V> constexpr auto MakeUCharSpan(V&& v) -> decltype(UCharSpanCast(Span{std::forward<V>(v)})) { return UCharSpanCast(Span{std::forward<V>(v)}); }
template <typename V> constexpr auto MakeUCharSpan(const V& v) -> decltype(UCharSpanCast(std::span{v})) { return UCharSpanCast(std::span{v}); }
template <typename V> constexpr auto MakeWritableUCharSpan(V&& v) -> decltype(UCharSpanCast(std::span{std::forward<V>(v)})) { return UCharSpanCast(std::span{std::forward<V>(v)}); }
#endif // BITCOIN_SPAN_H