db6aa9d8d3
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>
8 lines
538 B
Text
8 lines
538 B
Text
366.lean:1:0-2:72: warning: Definition `foo` of class type must be marked with `@[reducible]` or `@[implicit_reducible]`
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[Meta.synthInstance] ✅️ Inhabited Nat
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[Meta.synthInstance] new goal Inhabited Nat
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[Meta.synthInstance.instances] #[@instInhabitedOfMonad, instInhabitedNat]
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[Meta.synthInstance.apply] ✅️ apply instInhabitedNat to Inhabited Nat
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[Meta.synthInstance.tryResolve] ✅️ Inhabited Nat ≟ Inhabited Nat
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[Meta.synthInstance.answer] ✅️ Inhabited Nat
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[Meta.synthInstance] result instInhabitedNat
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