boostorg/optional
1
0
Fork 1
mirror of https://github.com/boostorg/optional.git synced 2025-07-29 12:07:21 +02:00
Code Issues Packages Projects Releases Wiki Activity

spelling: optional

Browse Source 
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
This commit is contained in:
Josh Soref
2022-11-01 21:46:31 -04:00
committed by Andrzej Krzemienski
parent 599c72f23b
commit 4b63acfc10
13 changed files with 18 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
doc/28_ref_optional_semantics.qbk
View File

@ -1249,7 +1249,7 @@ __SPACE__
* [*Returns:] `(!y) ? false : (!x) ? true : *x < *y`.
* [*Notes:] This definition guarantees that `optional<T>` not containing a value is ordered as less than any `optional<T>` containing any value, and equivalent to any other `optional<T>` not containing a value.
Pointers have shallow relational operators while `optional` has deep relational operators. Do not use `operator<` directly in generic code
which expect to be given either an `optional<T>` or a pointer; use __FUNCTION_LESS_POINTEES__ instead. `T` need not be __STD_LESS_THAN_COMPARABLE__. Only single `operator<` is required. Other relational operations are defined in terms of this one. If `T`'s `operator<` satisfies the axioms of __STD_LESS_THAN_COMPARABLE__ (transitivity, antisymmetry and irreflexivity), `optinal<T>` is __STD_LESS_THAN_COMPARABLE__.
which expect to be given either an `optional<T>` or a pointer; use __FUNCTION_LESS_POINTEES__ instead. `T` need not be __STD_LESS_THAN_COMPARABLE__. Only single `operator<` is required. Other relational operations are defined in terms of this one. If `T`'s `operator<` satisfies the axioms of __STD_LESS_THAN_COMPARABLE__ (transitivity, antisymmetry and irreflexivity), `optional<T>` is __STD_LESS_THAN_COMPARABLE__.
* [*Example:]
``
optional<T> oN, oN_;