[ConstraintSystem] Use an explicit generic argument constraint for UnresolvedSpecializeExpr.
#66657
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UnresolvedSpecializeExpr. The eager generic argument matching code in CSGen for unresolved specializations was incorrect because it didn't account for parameter packs. Fortunately, a constraint to delay explicit generic argument matching already exists for macros. Use it here.
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constraint simplification.
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DougGregor
approved these changes
Jun 15, 2023
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The eager generic argument matching code in CSGen for unresolved specializations was incorrect because it didn't account for parameter packs. Fortunately, a constraint to delay explicit generic argument matching already exists for macros. Use it here. This also fixes a longstanding issue where references to generic typealiases were handled incorrectly in expressions, leading to bogus and misleading error messages.
rdar://110800793