Improve the implementation of __enumerable_thread_local_storage #2049
+69
−53
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This patch returns to the CRTP-based implementation, with a workaround applied to make the VS 2017 C++ compiler happy.
But more importantly, it addresses two other issues: stores the construction arguments as a tuple of values (by removing references from the deduced types) and replaces
unique_ptr
withoptional
to avoid memory allocations.