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Implement basic List.drop that satisfies tests

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Issues with uniqueness and copying which leaks memory obviously needs to be fixed.
This commit is contained in:
tarjei 2021-05-18 22:59:55 +02:00
parent b7b04344f3
commit f45d89270b
11 changed files with 130 additions and 3 deletions
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23
compiler/can/src/builtins.rs
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@ -84,6 +84,7 @@ pub fn builtin_defs_map(symbol: Symbol, var_store: &mut VarStore) -> Option<Def>
LIST_MAP => list_map,
LIST_MAP2 => list_map2,
LIST_MAP3 => list_map3,
LIST_DROP => list_drop,
LIST_MAP_WITH_INDEX => list_map_with_index,
LIST_KEEP_IF => list_keep_if,
LIST_KEEP_OKS => list_keep_oks,
@ -1881,6 +1882,28 @@ fn list_set(symbol: Symbol, var_store: &mut VarStore) -> Def {
list_ret_var,
)
}
/// List.drop : List elem, Nat -> List elem
fn list_drop(symbol: Symbol, var_store: &mut VarStore) -> Def {
let list_var = var_store.fresh();
let index_var = var_store.fresh();
let body = RunLowLevel {
op: LowLevel::ListDrop,
args: vec![
(list_var, Var(Symbol::ARG_1)),
(index_var, Var(Symbol::ARG_2)),
],
ret_var: list_var,
};
defn(
symbol,
vec![(list_var, Symbol::ARG_1), (index_var, Symbol::ARG_2)],
var_store,
body,
list_var,
)
}
/// List.append : List elem, elem -> List elem
fn list_append(symbol: Symbol, var_store: &mut VarStore) -> Def {