diff options
Diffstat (limited to 'lib/compiler/test/core_fold_SUITE.erl')
-rw-r--r-- | lib/compiler/test/core_fold_SUITE.erl | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl index 0097e28d4d..4fd1f84569 100644 --- a/lib/compiler/test/core_fold_SUITE.erl +++ b/lib/compiler/test/core_fold_SUITE.erl @@ -26,7 +26,8 @@ unused_multiple_values_error/1,unused_multiple_values/1, multiple_aliases/1,redundant_boolean_clauses/1, mixed_matching_clauses/1,unnecessary_building/1, - no_no_file/1,configuration/1,supplies/1]). + no_no_file/1,configuration/1,supplies/1, + redundant_stack_frame/1,export_from_case/1]). -export([foo/0,foo/1,foo/2,foo/3]). @@ -45,7 +46,8 @@ groups() -> unused_multiple_values_error,unused_multiple_values, multiple_aliases,redundant_boolean_clauses, mixed_matching_clauses,unnecessary_building, - no_no_file,configuration,supplies]}]. + no_no_file,configuration,supplies, + redundant_stack_frame,export_from_case]}]. init_per_suite(Config) -> @@ -527,4 +529,60 @@ supplies(_Config) -> do_supplies(#{1 := Value}) when byte_size(Value), byte_size(kg) -> working. +redundant_stack_frame(_Config) -> + {1,2} = do_redundant_stack_frame(#{x=>1,y=>2}), + {'EXIT',{{badkey,_,x},_}} = (catch do_redundant_stack_frame(#{y=>2})), + {'EXIT',{{badkey,_,y},_}} = (catch do_redundant_stack_frame(#{x=>1})), + ok. + +do_redundant_stack_frame(Map) -> + %% There should not be a stack frame for this function. + X = case Map of + #{x := X0} -> + X0; + #{} -> + erlang:error({badkey, Map, x}) + end, + Y = case Map of + #{y := Y0} -> + Y0; + #{} -> + erlang:error({badkey, Map, y}) + end, + {X, Y}. + +%% Cover some clauses in sys_core_fold:remove_first_value/2. + +-record(export_from_case, {val}). + +export_from_case(_Config) -> + a = export_from_case_1(true), + b = export_from_case_1(false), + + R = #export_from_case{val=0}, + {ok,R} = export_from_case_2(false, R), + {ok,#export_from_case{val=42}} = export_from_case_2(true, R), + + ok. + +export_from_case_1(Bool) -> + case Bool of + true -> + id(42), + Result = a; + false -> + Result = b + end, + id(Result). + +export_from_case_2(Bool, Rec) -> + case Bool of + false -> + Result = Rec; + true -> + Result = Rec#export_from_case{val=42} + end, + {ok,Result}. + + id(I) -> I. |