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author | Christian Rauch <Rauch.Christian@gmx.de> | 2022-07-05 10:55:48 +0100 |
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committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2022-07-19 14:21:54 +0300 |
commit | 1c4d4801850559d6f919eef5c2ffbaf7675dbc46 (patch) | |
tree | d1686453c2d047565b9708bc9e03d375fcfa8578 /src/qcam/assets/feathericons/terminal.svg | |
parent | ef77e2637985b61dc99669b4396647ad13acb204 (diff) |
libcamera: controls: Use std::optional to handle invalid control values
Previously, ControlList::get<T>() would use default constructed objects to
indicate that a ControlList does not have the requested Control. This has
several disadvantages: 1) It requires types to be default constructible,
2) it does not differentiate between a default constructed object and an
object that happens to have the same state as a default constructed object.
std::optional<T> additionally stores the information if the object is valid
or not, and therefore is more expressive than a default constructed object.
Signed-off-by: Christian Rauch <Rauch.Christian@gmx.de>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/qcam/assets/feathericons/terminal.svg')
0 files changed, 0 insertions, 0 deletions