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remove optional fields destruct in mono pattern

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This commit is contained in:
Folkert 2020-12-29 02:10:27 +01:00
parent eb501f90a2
commit b9f92851a4
3 changed files with 32 additions and 50 deletions
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38
compiler/mono/src/decision_tree.rs
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@ -411,9 +411,6 @@ fn test_at_path<'a>(selected_path: &Path, branch: &Branch<'a>, all_tests: &mut V
DestructType::Required => {
arguments.push((Pattern::Underscore, destruct.layout.clone()));
}
DestructType::Optional(_expr) => {
// do nothing
}
}
}
@ -540,27 +537,22 @@ fn to_relevant_branch_help<'a>(
..
} => {
debug_assert!(test_name == &TagName::Global(RECORD_TAG_NAME.into()));
let sub_positions = destructs
.into_iter()
.filter(|destruct| !matches!(destruct.typ, DestructType::Optional(_)))
.enumerate()
.map(|(index, destruct)| {
let pattern = match destruct.typ {
DestructType::Guard(guard) => guard.clone(),
DestructType::Required => Pattern::Underscore,
DestructType::Optional(_expr) => unreachable!("because of the filter"),
};
let sub_positions = destructs.into_iter().enumerate().map(|(index, destruct)| {
let pattern = match destruct.typ {
DestructType::Guard(guard) => guard.clone(),
DestructType::Required => Pattern::Underscore,
};
(
Path::Index {
index: index as u64,
tag_id: *tag_id,
path: Box::new(path.clone()),
},
Guard::NoGuard,
pattern,
)
});
(
Path::Index {
index: index as u64,
tag_id: *tag_id,
path: Box::new(path.clone()),
},
Guard::NoGuard,
pattern,
)
});
start.extend(sub_positions);
start.extend(end);