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Unify var-var

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greg 2019-02-23 01:20:19 -08:00
parent 452f2ab188
commit 2cc3367666
1 changed files with 3 additions and 1 deletions
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4
schala-lang/language/src/typechecking.rs
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@ -365,7 +365,9 @@ impl<'a> TypeContext<'a> {
}, },
(a @ Var(_), b @ Const(_)) => self.unify(b, a), (a @ Var(_), b @ Const(_)) => self.unify(b, a),
(Var(v1), Var(v2)) => { (Var(v1), Var(v2)) => {
panic!() self.unification_table.unify_var_var(v1.clone(), v2.clone())
.or_else(|_| TypeError::new(format!("Two type variables {:?} and {:?} couldn't unify", v1, v2)))?;
Ok(Var(v1.clone())) //arbitrary decision I think
}, },
(a, b) => TypeError::new(format!("{:?} and {:?} do not unify", a, b)), (a, b) => TypeError::new(format!("{:?} and {:?} do not unify", a, b)),
} }