swift

2bc8126c - [CSSimplify] Look through optional injection to diagnose argument/generic parameter mismatches

[CSSimplify] Look through optional injection to diagnose argument/generic parameter mismatches Parameter type could be optional but it shouldn't prevent the solver from recording an argument mismatch fix since that's the actual issue. Another significant change here is how `OptionalInjection` is treated when there is more than just optional injection that has to happen. For example, `inout T` -> UnsafePointer<U>?` requires multiple conversions and conversion of `inout` to `pointer` does not have a special path element, `OptionalInjection` should be dropped to avoid it getting in a way of `Pointee` mismatch diagnostics. Resolves: rdar://81425395