George 0c5cff300f Add userData to the diagnostic handler C API ...

Previously, there was no way to add context to the diagnostic engine via the C API. Adding this ability makes it much easier to reason about memory ownership, particularly in reference-counted languages such as Swift. There are more details in the review comments.

Reviewed By: ftynse, mehdi_amini

Differential Revision: https://reviews.llvm.org/D91738

2020-11-23 09:52:45 -08:00

2.9 KiB

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