Implement std::hash for beman::optional#69
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steve-downey merged 3 commits intobemanproject:mainfrom Oct 16, 2024
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A std::hash implementation for optional, the hash of the underlying value, or 0 for disengaged.
| struct hash<beman::optional26::optional<T>> { | ||
| static_assert(!is_reference_v<T>, "hash is not enabled for reference types"); | ||
| size_t operator()(const beman::optional26::optional<T>& o) const | ||
| noexcept(noexcept(hash<remove_const_t<T>>{}(*o))) { |
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Why do we need nested noexcept here. For example, is noexcept(true) different from noexcept(noexcept(true)) ?
neatudarius
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Oct 7, 2024
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LGTM 👍 with minor suggestions
neatudarius
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Oct 13, 2024
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A std::hash implementation for optional, the hash of the underlying value, or 0 for disengaged.