rosidl_generator_cpp: Initial changes for cpp17 features, ie std::optional #738
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…ional Based off discussion https://discourse.ros.org/t/optional-fields-in-message/991/16 As per [REP-2000](https://www.ros.org/reps/rep-2000.html), versions Galactic+ have minimum language requirements of C++17. This commit begins re-discussions on supporting std::optional through msg types of BoundedSequence, max size 1. `type[<=1]`. Signed-off-by: JWCS <[email protected]>
JWCS
requested review from
adityapande-1995,
methylDragon,
quarkytale and
sloretz
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Based off discussion https://discourse.ros.org/t/optional-fields-in-message/991/16 As per REP-2000, versions Galactic+ have minimum language requirements of C++17. This commit begins re-discussions on supporting std::optional through msg types of BoundedSequence, max size 1.
type[<=1].