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Fix List.first types

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This commit is contained in:
Richard Feldman 2020-06-24 23:08:25 -04:00
parent b3dfbeeec8
commit 0f36255f83
8 changed files with 90 additions and 62 deletions
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9
compiler/builtins/src/unique.rs
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@ -525,6 +525,15 @@ pub fn types() -> MutMap<Symbol, (SolvedType, Region)> {
Symbol::LIST_GET,
unique_function(
vec![list_type(UVAR1, TVAR1), int_type(UVAR2)],
result_type(UVAR3, flex(TVAR1), lift(UVAR4, index_out_of_bounds.clone())),
),
);
// first : List elem -> Result elem [ OutOfBounds ]*
add_type(
Symbol::LIST_FIRST,
unique_function(
vec![list_type(UVAR1, TVAR1)],
result_type(UVAR3, flex(TVAR1), lift(UVAR4, index_out_of_bounds)),
),
);