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This PR adds a warning to any `def` of class type that does not also declare an appropriate reducibility. The warning check runs after elaboration (checking the actual reducibility status via `getReducibilityStatus`) rather than syntactically checking modifiers before elaboration. This is necessary to accommodate patterns like `@[to_additive (attr := implicit_reducible)]` in Mathlib, where the reducibility attribute is applied during `.afterCompilation` by another attribute, and would be missed by a purely syntactic check. --------- Co-authored-by: Paul Reichert <6992158+datokrat@users.noreply.github.com> Co-authored-by: Kim Morrison <kim@tqft.net> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> |
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