diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index b298473617..bc9c97be87 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -1335,8 +1335,9 @@ eval_element(Call, #c_literal{val=Pos}, Tuple, Types) eval_failure(Call, badarg) end end; -eval_element(Call, Pos, Tuple, _Types) -> - case is_not_integer(Pos) orelse is_not_tuple(Tuple) of +eval_element(Call, Pos, Tuple, Sub) -> + case is_int_type(Pos, Sub) =:= no orelse + is_tuple_type(Tuple, Sub) =:= no of true -> eval_failure(Call, badarg); false -> @@ -1367,21 +1368,6 @@ eval_is_record(Call, Term, #c_literal{val=NeededTag}, end; eval_is_record(Call, _, _, _, _) -> Call. -%% is_not_integer(Core) -> true | false. -%% Returns true if Core is definitely not an integer. - -is_not_integer(#c_literal{val=Val}) when not is_integer(Val) -> true; -is_not_integer(#c_tuple{}) -> true; -is_not_integer(#c_cons{}) -> true; -is_not_integer(_) -> false. - -%% is_not_tuple(Core) -> true | false. -%% Returns true if Core is definitely not a tuple. - -is_not_tuple(#c_literal{val=Val}) when not is_tuple(Val) -> true; -is_not_tuple(#c_cons{}) -> true; -is_not_tuple(_) -> false. - %% eval_setelement(Call, Pos, Tuple, NewVal) -> Core. %% Evaluates setelement/3 if position Pos is an integer %% the shape of the tuple Tuple is known. @@ -2860,6 +2846,22 @@ is_boolean_type(Var, Sub) -> yes_no(B) end. +-spec is_int_type(cerl:cerl(), sub()) -> yes_no_maybe(). + +is_int_type(Var, Sub) -> + case get_type(Var, Sub) of + none -> maybe; + C -> yes_no(cerl:is_c_int(C)) + end. + +-spec is_tuple_type(cerl:cerl(), sub()) -> yes_no_maybe(). + +is_tuple_type(Var, Sub) -> + case get_type(Var, Sub) of + none -> maybe; + C -> yes_no(cerl:is_c_tuple(C)) + end. + yes_no(true) -> yes; yes_no(false) -> no. |