d2485239f8
This adds a new `Map.lookup_try` method that returns a `std::optional<Value>` for a given key. If the key is not in the map, `std::nullopt` is returned. If it is in the map, then a copy of the value is returned. Note that the copy is necessary because `std::optional` can't contain reference types. This method helps a lot in #132219 to reduce boilerplate. Pull Request: https://projects.blender.org/blender/blender/pulls/132278
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