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Add builtin List.split

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satotake 2021-11-15 13:50:11 +00:00 • committed by GitHub
parent cac718638d
commit 73dda714de
6 changed files with 154 additions and 13 deletions
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19
compiler/builtins/src/std.rs
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@ -1015,6 +1015,25 @@ pub fn types() -> MutMap<Symbol, (SolvedType, Region)> {
Box::new(list_type(flex(TVAR1))),
);
// split : List elem, Nat -> { before: List elem, others: List elem }
add_top_level_function_type!(
Symbol::LIST_SPLIT,
vec![list_type(flex(TVAR1)), nat_type(),],
Box::new(SolvedType::Record {
fields: vec![
(
"before".into(),
RecordField::Required(list_type(flex(TVAR1)))
),
(
"others".into(),
RecordField::Required(list_type(flex(TVAR1)))
),
],
ext: Box::new(SolvedType::EmptyRecord),
},),
);
// drop : List elem, Nat -> List elem
add_top_level_function_type!(
Symbol::LIST_DROP,