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Refactor 'diving_in loop internals in prepare_vtable_segments

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Less explicit loops -- easier to read.
This commit is contained in:
Maybe Waffle 2023-07-19 10:01:48 +00:00
parent f8f5d7aab2
commit 364fc444a5
1 changed files with 17 additions and 17 deletions
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34
compiler/rustc_trait_selection/src/traits/vtable.rs
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@ -126,24 +126,24 @@ fn prepare_vtable_segments_inner<'tcx, T>(
pred.subst_supertrait(tcx, &inner_most_trait_ref).as_trait_clause()
});
'diving_in_skip_visited_traits: loop {
if let Some(next_super_trait) = direct_super_traits_iter.next() {
if visited.insert(next_super_trait.to_predicate(tcx)) {
// We're throwing away potential constness of super traits here.
// FIXME: handle ~const super traits
let next_super_trait = next_super_trait.map_bound(|t| t.trait_ref);
stack.push((
next_super_trait,
emit_vptr_on_new_entry,
Some(direct_super_traits_iter),
));
break 'diving_in_skip_visited_traits;
} else {
continue 'diving_in_skip_visited_traits;
}
} else {
break 'diving_in;
// Find an unvisited supertrait
match direct_super_traits_iter
.find(|&super_trait| visited.insert(super_trait.to_predicate(tcx)))
{
// Push it to the stack for the next iteration of 'diving_in to pick up
Some(unvisited_super_trait) => {
// We're throwing away potential constness of super traits here.
// FIXME: handle ~const super traits
let next_super_trait = unvisited_super_trait.map_bound(|t| t.trait_ref);
stack.push((
next_super_trait,
emit_vptr_on_new_entry,
Some(direct_super_traits_iter),
))
}
// There are no more unvisited direct super traits, dive-in finished
None => break 'diving_in,
}
}