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epee: span::operator[] allow mut ref from const span

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Changes the `operator[]` method so we can get mutable
references to elements even if the span is `const`.
The operator is now also `constexpr`.
This behavior matches `std::span`.

C++ standard reference: https://en.cppreference.com/w/cpp/container/span/operator_at
This commit is contained in:
jeffro256 2025-03-22 16:49:21 -05:00
parent f90a267fa3
commit 332d92ffbe
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1 changed files with 1 additions and 2 deletions
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contrib/epee/include/span.h
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@ -109,8 +109,7 @@ namespace epee
constexpr std::size_t size() const noexcept { return len; }
constexpr std::size_t size_bytes() const noexcept { return size() * sizeof(value_type); }
T &operator[](size_t idx) noexcept { return ptr[idx]; }
const T &operator[](size_t idx) const noexcept { return ptr[idx]; }
constexpr T &operator[](size_t idx) const noexcept { return ptr[idx]; }
private:
T* ptr;