[clang] [C++20] [Modules] [Driver] Don't enable -fdelayed-template-parsing by default on windows with C++20 modules (PR #69431)

[Iain Sandoe via cfe-commits]

https://github.com/iains commented:

Is delayed template parsing an optimisation or a correctness measure?
If it's an optimisation, then it seems that we should disable it for modules (because that then makes the modules cases correct).  If it's needed for correctness, then we have more of a problem - do we know how MSVC makes the two interact?


https://github.com/llvm/llvm-project/pull/69431