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fix: unification bug

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This commit is contained in:
Shunsuke Shibayama 2025-02-25 16:20:00 +09:00
parent 0feab05e73
commit 3dca63a597
1 changed files with 1 additions and 3 deletions
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4
crates/erg_compiler/context/unify.rs
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@ -660,11 +660,9 @@ impl<L: Locational> Unifier<'_, '_, '_, L> {
self.sub_unify(&l, sup)?; self.sub_unify(&l, sup)?;
Ok(()) Ok(())
} }
// OK: sub: (_: Nat), sup: 0
// ERR: sub: (_: Nat), sup: "a"
(TyParam::Erased(t), sup) => { (TyParam::Erased(t), sup) => {
let sup_t = self.ctx.get_tp_t(sup)?; let sup_t = self.ctx.get_tp_t(sup)?;
if self.ctx.subtype_of(t, &sup_t.derefine()) { if self.ctx.subtype_of(t, &sup_t) {
Ok(()) Ok(())
} else { } else {
Err(TyCheckErrors::from(TyCheckError::subtyping_error( Err(TyCheckErrors::from(TyCheckError::subtyping_error(