[Diagnostics] Avoid relying on solution for contextual purpose information #36947
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CertifiedRice
approved these changes
Apr 17, 2021
…pose Having purpose attached to the contextual type element makes it much easier to diagnose contextual mismatches without involving constraint system state.
`ContextualFailure` is the main beneficiary of additional information associated with `ContextualType` element because it no longer has to query solution for "purpose" of the contextual information. Resolves: rdar://68795727
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ContextualTypeelement to carry its purposeBoth of these changes mean that diagnostics no longer need to
query a solution for contextual "purpose" associated with a
particular location, which benefits
ContextualFailureand allof its subtypes.
Resolves: rdar://68795727