diff options
Diffstat (limited to 'lib/compiler/src/beam_validator.erl')
| -rw-r--r-- | lib/compiler/src/beam_validator.erl | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl index d01013101a..46c689e034 100644 --- a/lib/compiler/src/beam_validator.erl +++ b/lib/compiler/src/beam_validator.erl @@ -809,6 +809,14 @@ valfun_4({test,has_map_fields,{f,Lbl},Src,{list,List}}, Vst) -> assert_type(map, Src, Vst), assert_unique_map_keys(List), branch_state(Lbl, Vst); +valfun_4({test,is_list,{f,Lbl},[Src]}, Vst) -> + validate_src([Src], Vst), + Type = case get_term_type(Src, Vst) of + cons -> cons; + nil -> nil; + _ -> list + end, + set_aliased_type(Type, Src, branch_state(Lbl, Vst)); valfun_4({test,is_map,{f,Lbl},[Src]}, Vst0) -> Vst = branch_state(Lbl, Vst0), case Src of @@ -820,6 +828,13 @@ valfun_4({test,is_map,{f,Lbl},[Src]}, Vst0) -> _ -> kill_state(Vst0) end; +valfun_4({test,is_nil,{f,Lbl},[Src]}, Vst) -> + case get_term_type(Src, Vst) of + list -> + branch_state(Lbl, set_type_reg(cons, Src, Vst)); + _ -> + branch_state(Lbl, Vst) + end; valfun_4({test,is_eq_exact,{f,Lbl},[Src,Val]=Ss}, Vst0) -> validate_src(Ss, Vst0), Infer = infer_types(Src, Vst0), @@ -1536,6 +1551,8 @@ assert_not_literal(Literal) -> error({literal_not_allowed,Literal}). %% %% nil Empty list: [] %% +%% list List: [] or [_|_] +%% %% {tuple,[Sz]} Tuple. An element has been accessed using %% element/2 or setelement/3 so that it is known that %% the type is a tuple of size at least Sz. @@ -2118,6 +2135,14 @@ return_type_1(erlang, setelement, 3, Vst) -> {integer,I} -> upgrade_tuple_type({tuple,[I]}, TupleType); _ -> TupleType end; +return_type_1(erlang, '++', 2, Vst) -> + case get_term_type({x,0}, Vst) =:= cons orelse + get_term_type({x,1}, Vst) =:= cons of + true -> cons; + false -> list + end; +return_type_1(erlang, '--', 2, _Vst) -> + list; return_type_1(erlang, F, A, _) -> return_type_erl(F, A); return_type_1(math, F, A, _) -> |