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Implement List.sublist

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satotake 2021-11-10 13:16:57 +00:00 • committed by GitHub
parent d4a741d483
commit 9f5d3f521b
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16
compiler/builtins/src/std.rs
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@ -985,6 +985,22 @@ pub fn types() -> MutMap<Symbol, (SolvedType, Region)> {
Box::new(list_type(flex(TVAR1))),
);
// sublist : List elem, { start : Nat, len : Nat } -> List elem
add_top_level_function_type!(
Symbol::LIST_SUBLIST,
vec![
list_type(flex(TVAR1)),
SolvedType::Record {
fields: vec![
("start".into(), RecordField::Required(nat_type())),
("len".into(), RecordField::Required(nat_type())),
],
ext: Box::new(SolvedType::EmptyRecord),
},
],
Box::new(list_type(flex(TVAR1))),
);
// drop : List elem, Nat -> List elem
add_top_level_function_type!(
Symbol::LIST_DROP,