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LWG4509 std::optional<T>::transform cannot be implemented while supporting program-defined specializations #2619

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LWG4509 std::optional<T>::transform cannot be implemented while supporting program-defined specializations#2619
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LEWGLibrary Evolution
@jwakely

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@jwakely
jwakely
opened on Feb 18, 2026

https://cplusplus.github.io/LWG/issue4509

This is a design question that needs LEWG to decide.

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