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Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
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Josh Soref
2022-11-01 21:46:22 -04:00
committed by Andrzej Krzemienski
parent c809700d6a
commit 416c89e165
3 changed files with 3 additions and 3 deletions
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doc/18_exception_safety.qbk
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@ -51,7 +51,7 @@ Operation `emplace` provides basic exception safety guarantee. If it throws, the
Unless `swap` on optional is customized, its primary implementation forwards calls to `T`'s `swap` or move constructor (depending on the initialization state of the optional objects). Thus, if both `T`'s `swap` and move constructor never throw, `swap` on `optional<T>` never throws. similarly, if both `T`'s `swap` and move constructor offer strong guarantee, `swap` on `optional<T>` also offers a strong guarantee.
In case `swap` on optional is customized, the call to `T`'s move constructor are replaced with the calls to `T`'s default constructor followed by `swap`. (This is more useful on older compilers that do not support move semantics, when one wants to acheive stronger exception safety guarantees.) In this case the exception safety guarantees for `swap` are reliant on the guarantees of `T`'s `swap` and default constructor
In case `swap` on optional is customized, the call to `T`'s move constructor are replaced with the calls to `T`'s default constructor followed by `swap`. (This is more useful on older compilers that do not support move semantics, when one wants to achieve stronger exception safety guarantees.) In this case the exception safety guarantees for `swap` are reliant on the guarantees of `T`'s `swap` and default constructor
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