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Make sure openness constraint goes under tuples

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Closes #5177
This commit is contained in:
Ayaz Hafiz 2023-03-24 14:12:57 -05:00
parent 41d7ade5a3
commit 1b2ee9ad30
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2 changed files with 18 additions and 0 deletions
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5
crates/compiler/solve/src/solve.rs
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@ -1847,6 +1847,11 @@ fn open_tag_union(subs: &mut Subs, var: Variable) {
stack.extend(subs.get_subs_slice(fields.variables())); stack.extend(subs.get_subs_slice(fields.variables()));
} }
Structure(Tuple(elems, _)) => {
// Open up all nested tag unions.
stack.extend(subs.get_subs_slice(elems.variables()));
}
Structure(Apply(Symbol::LIST_LIST, args)) => { Structure(Apply(Symbol::LIST_LIST, args)) => {
// Open up nested tag unions. // Open up nested tag unions.
stack.extend(subs.get_subs_slice(args)); stack.extend(subs.get_subs_slice(args));

13
crates/reporting/tests/test_reporting.rs
View file

@ -13170,4 +13170,17 @@ I recommend using camelCase. It's the standard style in Roc code!
I would have to crash if I saw one of those! Add branches for them! I would have to crash if I saw one of those! Add branches for them!
"### "###
); );
test_no_problem!(
openness_constraint_opens_under_tuple,
indoc!(
r#"
x : [A, B, C]
when (x, 1u8) is
(A, _) -> Bool.true
(B, _) -> Bool.true
_ -> Bool.true
"#
)
);
} }