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feat(List): add map3

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rvcas 2021-03-08 21:12:19 -05:00
parent c2525d2407
commit 268ab82410
10 changed files with 351 additions and 2 deletions
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15
compiler/builtins/src/std.rs
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@ -817,6 +817,21 @@ pub fn types() -> MutMap<Symbol, (SolvedType, Region)> {
)
});
// map3 : List a, List b, List c, (a, b, c -> d) -> List d
add_type(Symbol::LIST_MAP3, {
let_tvars! {a, b, c, d, cvar};
top_level_function(
vec![
list_type(flex(a)),
list_type(flex(b)),
list_type(flex(c)),
closure(vec![flex(a), flex(b), flex(c)], cvar, Box::new(flex(d))),
],
Box::new(list_type(flex(d))),
)
});
// append : List elem, elem -> List elem
add_type(
Symbol::LIST_APPEND,