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Expose HIR type substitution and validate concrete arguments using the shared source constraint solver. - #3902
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…e shared source constraint solver.
Ian Davis (idavis)
added this pull request to stack #3892
October 7, 2026 00:51
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Summary
The branch introduces a public frontend API:
This API can validate already-selected concrete generic arguments using the source type checker’s constraint solver.
It builds and tests the validator needed to fix concrete generic-instantiation bugs in a later branch, but it does not yet invoke that validator from any existing production compiler path. This is setup for a bigger validation and safety check PR in the future.