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Drop a clone in occurs

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This commit is contained in:
Richard Feldman 2021-07-30 23:34:22 -04:00
parent 30fbc12c9f
commit f22da2e5b2
1 changed files with 8 additions and 8 deletions
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16
compiler/types/src/subs.rs
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@ -653,7 +653,7 @@ fn occurs(
if seen.contains(&root_var) {
Some((root_var, vec![]))
} else {
match subs.get_content_without_compacting(root_var).clone() {
match subs.get_content_without_compacting(root_var) {
FlexVar(_) | RigidVar(_) | RecursionVar { .. } | Error => None,
Structure(flat_type) => {
@ -664,14 +664,14 @@ fn occurs(
match flat_type {
Apply(_, args) => short_circuit(subs, root_var, &new_seen, args.iter()),
Func(arg_vars, closure_var, ret_var) => {
let it = once(&ret_var)
.chain(once(&closure_var))
.chain(arg_vars.iter());
let it = once(ret_var)
.chain(once(closure_var))
.chain(arg_vars.into_iter());
short_circuit(subs, root_var, &new_seen, it)
}
Record(vars_by_field, ext_var) => {
let it =
once(&ext_var).chain(vars_by_field.values().map(|field| match field {
once(ext_var).chain(vars_by_field.values().map(|field| match field {
RecordField::Optional(var) => var,
RecordField::Required(var) => var,
RecordField::Demanded(var) => var,
@ -679,16 +679,16 @@ fn occurs(
short_circuit(subs, root_var, &new_seen, it)
}
TagUnion(tags, ext_var) => {
let it = once(&ext_var).chain(tags.values().flatten());
let it = once(ext_var).chain(tags.values().flatten());
short_circuit(subs, root_var, &new_seen, it)
}
FunctionOrTagUnion(_, _, ext_var) => {
let it = once(&ext_var);
let it = once(ext_var);
short_circuit(subs, root_var, &new_seen, it)
}
RecursiveTagUnion(_rec_var, tags, ext_var) => {
// TODO rec_var is excluded here, verify that this is correct
let it = once(&ext_var).chain(tags.values().flatten());
let it = once(ext_var).chain(tags.values().flatten());
short_circuit(subs, root_var, &new_seen, it)
}
EmptyRecord | EmptyTagUnion | Erroneous(_) => None,