language-servers/roc
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record, tag, alias errors

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- duplicate fields and tags are reported
- circular aliases are reported
This commit is contained in:
Folkert 2020-04-13 20:53:16 +02:00
parent 0372b34e86
commit f6af66f342
13 changed files with 679 additions and 55 deletions
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14
compiler/unify/src/unify.rs
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@ -73,6 +73,7 @@ struct Context {
pub enum Unified {
Success(Pool),
Failure(Pool, ErrorType, ErrorType),
BadType(Pool, roc_types::types::Problem),
}
#[derive(Debug)]
@ -91,11 +92,18 @@ pub fn unify(subs: &mut Subs, var1: Variable, var2: Variable) -> Unified {
if mismatches.is_empty() {
Unified::Success(vars)
} else {
let type1 = subs.var_to_error_type(var1);
let type2 = subs.var_to_error_type(var2);
let (type1, mut problems) = subs.var_to_error_type(var1);
let (type2, problems2) = subs.var_to_error_type(var2);
problems.extend(problems2);
subs.union(var1, var2, Content::Error.into());
Unified::Failure(vars, type1, type2)
if !problems.is_empty() {
Unified::BadType(vars, problems.remove(0))
} else {
Unified::Failure(vars, type1, type2)
}
}
}