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fix: constraints instantiation bug

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This commit is contained in:
Shunsuke Shibayama 2023-03-08 11:06:08 +09:00
parent 5d8506b548
commit 814748a6be
8 changed files with 69 additions and 31 deletions
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8
crates/erg_compiler/context/generalize.rs
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@ -350,6 +350,7 @@ impl Context {
{
Ok(TyParam::FreeVar(fv))
}
// REVIEW: most likely the result of an error already made
TyParam::FreeVar(_fv) if self.level == 0 => Err(TyCheckErrors::from(
TyCheckError::dummy_infer_error(self.cfg.input.clone(), fn_name!(), line!()),
)),
@ -629,7 +630,11 @@ impl Context {
let res = self.validate_subsup(sub_t, super_t, variance, qnames, loc);
fv.undo();
match res {
Ok(ty) => Ok(ty),
Ok(ty) => {
// TODO: T(:> Nat <: Int) -> T(:> Nat, <: Int) ==> Int -> Nat
// fv.link(&ty);
Ok(ty)
}
Err(errs) => {
fv.link(&Never);
Err(errs)
@ -637,7 +642,6 @@ impl Context {
}
} else {
// no dereference at this point
// drop(constraint);
Ok(Type::FreeVar(fv))
}
}