diff options
Diffstat (limited to 'lib/compiler')
| -rw-r--r-- | lib/compiler/test/bs_match_SUITE.erl | 62 |
1 files changed, 58 insertions, 4 deletions
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl index 7e1a432511..c2c5387eb6 100644 --- a/lib/compiler/test/bs_match_SUITE.erl +++ b/lib/compiler/test/bs_match_SUITE.erl @@ -40,7 +40,7 @@ map_and_binary/1,unsafe_branch_caching/1, bad_literals/1,good_literals/1,constant_propagation/1, parse_xml/1,get_payload/1,escape/1,num_slots_different/1, - check_bitstring_list/1,guard/1]). + beam_bsm/1,guard/1,is_ascii/1]). -export([coverage_id/1,coverage_external_ignore/2]). @@ -73,7 +73,7 @@ groups() -> map_and_binary,unsafe_branch_caching, bad_literals,good_literals,constant_propagation,parse_xml, get_payload,escape,num_slots_different, - check_bitstring_list,guard]}]. + beam_bsm,guard,is_ascii]}]. init_per_suite(Config) -> @@ -1574,10 +1574,22 @@ lgettext(<<"de">>, <<"navigation">>, <<"Results">>) -> lgettext(<<"de">>, <<"navigation">>, <<"Resources">>) -> {ok, <<"Ressourcen">>}. -%% Cover more code in beam_bsm. -check_bitstring_list(_Config) -> +%% Test more code in beam_bsm. +beam_bsm(_Config) -> true = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [1,0,1,1]), false = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [0]), + + true = bsm_validate_scheme(<<>>), + true = bsm_validate_scheme(<<5,10>>), + false = bsm_validate_scheme(<<5,10,11,12>>), + true = bsm_validate_scheme([]), + true = bsm_validate_scheme([5,10]), + false = bsm_validate_scheme([5,6,7]), + + <<1,2,3>> = bsm_must_save_and_not_save(<<1,2,3>>, []), + D = fun(N) -> 2*N end, + [2,4|<<3>>] = bsm_must_save_and_not_save(<<1,2,3>>, [D,D]), + ok. check_bitstring_list(<<H:1,T1/bitstring>>, [H|T2]) -> @@ -1587,6 +1599,30 @@ check_bitstring_list(<<>>, []) -> check_bitstring_list(_, _) -> false. +bsm_validate_scheme([]) -> true; +bsm_validate_scheme([H|T]) -> + case bsm_is_scheme(H) of + true -> bsm_validate_scheme(T); + false -> false + end; +bsm_validate_scheme(<<>>) -> true; +bsm_validate_scheme(<<H, Rest/binary>>) -> + case bsm_is_scheme(H) of + true -> bsm_validate_scheme(Rest); + false -> false + end. + +bsm_is_scheme(Int) -> + Int rem 5 =:= 0. + +%% NOT OPTIMIZED: different control paths use different positions in the binary +bsm_must_save_and_not_save(Bin, []) -> + Bin; +bsm_must_save_and_not_save(<<H,T/binary>>, [F|Fs]) -> + [F(H)|bsm_must_save_and_not_save(T, Fs)]; +bsm_must_save_and_not_save(<<>>, []) -> + []. + guard(_Config) -> Tuple = id({a,b}), ok = guard_1(<<1,2,3>>, {1,2,3}), @@ -1601,6 +1637,24 @@ guard_1(<<A,B,C>>, Tuple) when Tuple =:= {A,B,C} -> guard_2(<<_>>, Healing) when Healing#{[] => Healing} =:= #{[] => #{}} -> ok. +is_ascii(_Config) -> + true = do_is_ascii(<<>>), + true = do_is_ascii(<<"string">>), + false = do_is_ascii(<<1024/utf8>>), + {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<$A,0:3>>)), + {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<16#80,0:3>>)), + ok. + +do_is_ascii(<<>>) -> + true; +do_is_ascii(<<C,_/binary>>) when C >= 16#80 -> + %% This clause must fail to match if the size of the argument in + %% bits is not divisible by 8. Beware of unsafe optimizations. + false; +do_is_ascii(<<_, T/binary>>) -> + do_is_ascii(T). + + check(F, R) -> R = F(). |