C++: Add cases in the Allocation model.#4824

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jbj merged 4 commits intogithub:mainfrom

geoffw0:modelchanges5

Dec 18, 2020

Commits on Dec 14, 2020

Commits on Dec 15, 2020

C++: Fix comment.
geoffw0
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Commits on Dec 16, 2020

C++: Back out support for SysAllocString. It turns out supporting all of the SysAlloc stuff is beyond our current models, supporting just SysFreeString as we do is OK.
geoffw0
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