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List prepend implementation with tests, and a few small code clarity changes to list_push implementation

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This commit is contained in:
Chad Stearns 2020-07-25 19:22:01 -04:00
parent fc52bdc59a
commit 68b13d29fd
7 changed files with 214 additions and 10 deletions
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24
compiler/can/src/builtins.rs
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@ -60,6 +60,7 @@ pub fn builtin_defs(var_store: &mut VarStore) -> MutMap<Symbol, Def> {
Symbol::LIST_REPEAT => list_repeat,
Symbol::LIST_REVERSE => list_reverse,
Symbol::LIST_APPEND => list_append,
Symbol::LIST_PREPEND => list_prepend,
Symbol::NUM_ADD => num_add,
Symbol::NUM_SUB => num_sub,
Symbol::NUM_MUL => num_mul,
@ -879,6 +880,29 @@ fn list_push(symbol: Symbol, var_store: &mut VarStore) -> Def {
)
}
/// List.prepend : List elem, elem -> List elem
fn list_prepend(symbol: Symbol, var_store: &mut VarStore) -> Def {
let list_var = var_store.fresh();
let elem_var = var_store.fresh();
let body = RunLowLevel {
op: LowLevel::ListPrepend,
args: vec![
(list_var, Var(Symbol::ARG_1)),
(elem_var, Var(Symbol::ARG_2)),
],
ret_var: list_var,
};
defn(
symbol,
vec![(list_var, Symbol::ARG_1), (elem_var, Symbol::ARG_2)],
var_store,
body,
list_var,
)
}
/// Num.rem : Int, Int -> Result Int [ DivByZero ]*
fn num_rem(symbol: Symbol, var_store: &mut VarStore) -> Def {
let num_var = var_store.fresh();