[ConstraintSystem] Add support for expression patterns #41570
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…tern This makes it possible to associate expression with its parent pattern.
Since `SolutionApplicationTarget` could represent whole statement or pattern with multiple expressions, it makes sense to add a dedicated method to pre-check everything together.
hborla
approved these changes
Feb 26, 2022
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Add a new
CTP_ExprPatterncontextual type and augmentSolutionApplicationTargetto handle expressions originated from expression patterns.
Refactor pre-check to be able to deal with solution application targets
These are the preliminary changes to start type-checking expression patterns in the solver
when they appear in result builders and multi-statement closures.