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groundwork for RoseTree

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This commit is contained in:
Folkert 2021-01-23 01:39:04 +01:00
parent a4d7e809d2
commit 513d7cd78f
9 changed files with 304 additions and 29 deletions
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20
compiler/mono/src/decision_tree.rs
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@ -602,7 +602,21 @@ fn to_relevant_branch_help<'a>(
}
}
Wrapped::RecordOrSingleTagUnion => {
todo!("this should need a special index, right?")
let sub_positions = arguments.into_iter().enumerate().map(
|(index, (pattern, _))| {
(
Path::Index {
index: index as u64,
tag_id,
path: Box::new(path.clone()),
},
Guard::NoGuard,
pattern,
)
},
);
start.extend(sub_positions);
start.extend(end);
}
Wrapped::MultiTagUnion => {
let sub_positions = arguments.into_iter().enumerate().map(
@ -1035,6 +1049,10 @@ fn path_to_expr_help<'a>(
match variant {
NonRecursive(layouts) | Recursive(layouts) => layouts[*tag_id as usize],
NonNullableUnwrapped(fields) => {
debug_assert_eq!(*tag_id, 0);
fields
}
NullableWrapped {
nullable_id,
other_tags: layouts,