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add first version of List.dropAt

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* adds an implementation with no uniqueness/mutability
This commit is contained in:
Dan Knutson 2021-10-02 20:03:07 -05:00
parent ff9866420b
commit 3baff93a97
11 changed files with 145 additions and 13 deletions
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compiler/mono/src/borrow.rs
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@ -993,6 +993,7 @@ pub fn lowlevel_borrow_signature(arena: &Bump, op: LowLevel) -> &[bool] {
// List.append should own its first argument
ListAppend => arena.alloc_slice_copy(&[owned, owned]),
ListDrop => arena.alloc_slice_copy(&[owned, irrelevant]),
ListDropAt => arena.alloc_slice_copy(&[owned, irrelevant]),
ListSwap => arena.alloc_slice_copy(&[owned, irrelevant, irrelevant]),
Eq | NotEq => arena.alloc_slice_copy(&[borrowed, borrowed]),