diff options
27 files changed, 334 insertions, 43 deletions
diff --git a/erts/doc/src/absform.xml b/erts/doc/src/absform.xml index 4c84412dd6..88e8b284fb 100644 --- a/erts/doc/src/absform.xml +++ b/erts/doc/src/absform.xml @@ -285,7 +285,8 @@ <item>If E is <c><![CDATA[fun Name / Arity]]></c>, then Rep(E) = <c><![CDATA[{'fun',LINE,{function,Name,Arity}}]]></c>.</item> <item>If E is <c><![CDATA[fun Module:Name/Arity]]></c>, then - Rep(E) = <c><![CDATA[{'fun',LINE,{function,Module,Name,Arity}}]]></c>.</item> + Rep(E) = <c><![CDATA[{'fun',LINE,{function,Rep(Module),Rep(Name),Rep(Arity)}}]]></c>. + (Before the R15 release: Rep(E) = <c><![CDATA[{'fun',LINE,{function,Module,Name,Arity}}]]></c>.)</item> <item>If E is <c><![CDATA[fun Fc_1 ; ... ; Fc_k end]]></c> where each <c><![CDATA[Fc_i]]></c> is a function clause then Rep(E) = <c><![CDATA[{'fun',LINE,{clauses,[Rep(Fc_1), ..., Rep(Fc_k)]}}]]></c>.</item> diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c index 2561d7a630..8c1f85ea37 100644 --- a/erts/emulator/beam/beam_bif_load.c +++ b/erts/emulator/beam/beam_bif_load.c @@ -66,8 +66,6 @@ load_module_2(BIF_ALIST_2) erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); erts_smp_block_system(0); - erts_export_consolidate(); - hp = HAlloc(BIF_P, 3); sz = binary_size(BIF_ARG_2); if ((i = erts_load_module(BIF_P, 0, diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c index 57f5ad0a62..d82b5dbcac 100644 --- a/erts/emulator/beam/beam_load.c +++ b/erts/emulator/beam/beam_load.c @@ -758,6 +758,14 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks, } /* + * Since the literal table *may* have contained external + * funs (containing references to export entries), now is + * the time to consolidate the export tables. + */ + + erts_export_consolidate(); + + /* * Load the code chunk. */ diff --git a/erts/emulator/test/code_SUITE.erl b/erts/emulator/test/code_SUITE.erl index 29cbdedd17..db26655c15 100644 --- a/erts/emulator/test/code_SUITE.erl +++ b/erts/emulator/test/code_SUITE.erl @@ -278,7 +278,8 @@ t_check_old_code(Config) when is_list(Config) -> external_fun(Config) when is_list(Config) -> ?line false = erlang:function_exported(another_code_test, x, 1), - ?line ExtFun = erlang:make_fun(id(another_code_test), x, 1), + AnotherCodeTest = id(another_code_test), + ExtFun = fun AnotherCodeTest:x/1, ?line {'EXIT',{undef,_}} = (catch ExtFun(answer)), ?line false = erlang:function_exported(another_code_test, x, 1), ?line false = lists:member(another_code_test, erlang:loaded()), diff --git a/lib/compiler/src/sys_pre_expand.erl b/lib/compiler/src/sys_pre_expand.erl index 0fa1fea09f..7facbafb6d 100644 --- a/lib/compiler/src/sys_pre_expand.erl +++ b/lib/compiler/src/sys_pre_expand.erl @@ -554,9 +554,14 @@ fun_tq(Lf, {function,F,A}=Function, St0) -> {{'fun',Lf,Function,{Index,Uniq,Fname}}, St2#expand{fun_index=Index+1}} end; -fun_tq(L, {function,M,F,A}, St) -> - {{call,L,{remote,L,{atom,L,erlang},{atom,L,make_fun}}, - [{atom,L,M},{atom,L,F},{integer,L,A}]},St}; +fun_tq(L, {function,M,F,A}, St) when is_atom(M), is_atom(F), is_integer(A) -> + %% This is the old format for external funs, generated by a pre-R15 + %% compiler. That means that a tool, such as the debugger or xref, + %% directly invoked this module with the abstract code from a + %% pre-R15 BEAM file. Be helpful, and translate it to the new format. + fun_tq(L, {function,{atom,L,M},{atom,L,F},{integer,L,A}}, St); +fun_tq(Lf, {function,_,_,_}=ExtFun, St) -> + {{'fun',Lf,ExtFun},St}; fun_tq(Lf, {clauses,Cs0}, St0) -> Uniq = erlang:hash(Cs0, (1 bsl 27)-1), {Cs1,St1} = fun_clauses(Cs0, St0), diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 6f3590b156..6885405ae0 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -573,6 +573,13 @@ expr({'catch',L,E0}, St0) -> expr({'fun',L,{function,F,A},{_,_,_}=Id}, St) -> Lanno = lineno_anno(L, St), {#c_var{anno=Lanno++[{id,Id}],name={F,A}},[],St}; +expr({'fun',L,{function,M,F,A}}, St0) -> + {As,Aps,St1} = safe_list([M,F,A], St0), + Lanno = lineno_anno(L, St1), + {#icall{anno=#a{anno=Lanno}, + module=#c_literal{val=erlang}, + name=#c_literal{val=make_fun}, + args=As},Aps,St1}; expr({'fun',L,{clauses,Cs},Id}, St) -> fun_tq(Id, Cs, L, St); expr({call,L,{remote,_,M,F},As0}, #core{wanted=Wanted}=St0) -> diff --git a/lib/compiler/test/fun_SUITE.erl b/lib/compiler/test/fun_SUITE.erl index 368a5815bf..6067ee8e06 100644 --- a/lib/compiler/test/fun_SUITE.erl +++ b/lib/compiler/test/fun_SUITE.erl @@ -20,7 +20,11 @@ -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, init_per_group/2,end_per_group/2, - test1/1,overwritten_fun/1,otp_7202/1,bif_fun/1]). + test1/1,overwritten_fun/1,otp_7202/1,bif_fun/1, + external/1]). + +%% Internal export. +-export([call_me/1]). -include_lib("test_server/include/test_server.hrl"). @@ -28,7 +32,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> test_lib:recompile(?MODULE), - [test1, overwritten_fun, otp_7202, bif_fun]. + [test1,overwritten_fun,otp_7202,bif_fun,external]. groups() -> []. @@ -45,7 +49,6 @@ init_per_group(_GroupName, Config) -> end_per_group(_GroupName, Config) -> Config. - %%% The help functions below are copied from emulator:bs_construct_SUITE. -define(T(B, L), {B, ??B, L}). @@ -152,4 +155,47 @@ bif_fun(Config) when is_list(Config) -> ?line F = fun abs/1, ?line 5 = F(-5), ok. + +-define(APPLY(M, F, A), (fun(Fun) -> {ok,{a,b}} = Fun({a,b}) end)(fun M:F/A)). +-define(APPLY2(M, F, A), + (fun(Map) -> + Id = fun(I) -> I end, + List = [x,y], + List = Map(Id, List), + {type,external} = erlang:fun_info(Map, type) + end)(fun M:F/A)). +external(Config) when is_list(Config) -> + Mod = id(?MODULE), + Func = id(call_me), + Arity = id(1), + + ?APPLY(?MODULE, call_me, 1), + ?APPLY(?MODULE, call_me, Arity), + ?APPLY(?MODULE, Func, 1), + ?APPLY(?MODULE, Func, Arity), + ?APPLY(Mod, call_me, 1), + ?APPLY(Mod, call_me, Arity), + ?APPLY(Mod, Func, 1), + ?APPLY(Mod, Func, Arity), + + ListsMod = id(lists), + ListsMap = id(map), + ListsArity = id(2), + + ?APPLY2(lists, map, 2), + ?APPLY2(lists, map, ListsArity), + ?APPLY2(lists, ListsMap, 2), + ?APPLY2(lists, ListsMap, ListsArity), + ?APPLY2(ListsMod, map, 2), + ?APPLY2(ListsMod, map, ListsArity), + ?APPLY2(ListsMod, ListsMap, 2), + ?APPLY2(ListsMod, ListsMap, ListsArity), + + ok. + +call_me(I) -> + {ok,I}. + +id(I) -> + I. diff --git a/lib/compiler/test/pmod_SUITE.erl b/lib/compiler/test/pmod_SUITE.erl index 9a317b5762..3d02adaf52 100644 --- a/lib/compiler/test/pmod_SUITE.erl +++ b/lib/compiler/test/pmod_SUITE.erl @@ -96,6 +96,10 @@ basic_1(Config, Opts) -> ?line error = Prop4:bar_bar({s,a,b}), ?line error = Prop4:bar_bar([]), + %% Call from a fun. + Fun = fun(Arg) -> Prop4:bar(Arg) end, + ?line ok = Fun({s,0}), + ok. otp_8447(Config) when is_list(Config) -> diff --git a/lib/debugger/src/dbg_ieval.erl b/lib/debugger/src/dbg_ieval.erl index df725ed9e5..2e88c35741 100644 --- a/lib/debugger/src/dbg_ieval.erl +++ b/lib/debugger/src/dbg_ieval.erl @@ -768,6 +768,21 @@ expr({make_fun,Line,Name,Cs}, Bs, #ieval{module=Module}=Ieval) -> end, {value,Fun,Bs}; +%% Construct an external fun. +expr({make_ext_fun,Line,MFA0}, Bs0, Ieval0) -> + {[M,F,A],Bs} = eval_list(MFA0, Bs0, Ieval0), + try erlang:make_fun(M, F, A) of + Value -> + {value,Value,Bs} + catch + error:badarg -> + Ieval1 = Ieval0#ieval{line=Line}, + Ieval2 = dbg_istk:push(Bs0, Ieval1, false), + Ieval = Ieval2#ieval{module=erlang,function=make_fun, + arguments=[M,F,A],line=-1}, + exception(error, badarg, Bs, Ieval, true) + end; + %% Common test adaptation expr({call_remote,0,ct_line,line,As0,Lc}, Bs0, Ieval0) -> {As,_Bs} = eval_list(As0, Bs0, Ieval0), diff --git a/lib/debugger/src/dbg_iload.erl b/lib/debugger/src/dbg_iload.erl index ce5631e45f..3c95ef8068 100644 --- a/lib/debugger/src/dbg_iload.erl +++ b/lib/debugger/src/dbg_iload.erl @@ -369,6 +369,14 @@ expr({'fun',Line,{function,F,A},{_Index,_OldUniq,Name}}, _Lc) -> As = new_vars(A, Line), Cs = [{clause,Line,As,[],[{local_call,Line,F,As,true}]}], {make_fun,Line,Name,Cs}; +expr({'fun',Line,{function,{atom,_,M},{atom,_,F},{integer,_,A}}}, _Lc) + when 0 =< A, A =< 255 -> + %% New format in R15 for fun M:F/A (literal values). + {value,Line,erlang:make_fun(M, F, A)}; +expr({'fun',Line,{function,M,F,A}}, _Lc) -> + %% New format in R15 for fun M:F/A (one or more variables). + MFA = expr_list([M,F,A]), + {make_ext_fun,Line,MFA}; expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,self}},[]}, _Lc) -> {dbg,Line,self,[]}; expr({call,Line,{remote,_,{atom,_,erlang},{atom,_,get_stacktrace}},[]}, _Lc) -> diff --git a/lib/debugger/test/fun_SUITE.erl b/lib/debugger/test/fun_SUITE.erl index 8103d9c692..a06cdc7165 100644 --- a/lib/debugger/test/fun_SUITE.erl +++ b/lib/debugger/test/fun_SUITE.erl @@ -24,8 +24,10 @@ init_per_testcase/2,end_per_testcase/2, init_per_suite/1,end_per_suite/1, good_call/1,bad_apply/1,bad_fun_call/1,badarity/1, - ext_badarity/1,otp_6061/1]). --export([nothing/0]). + ext_badarity/1,otp_6061/1,external/1]). + +%% Internal exports. +-export([nothing/0,call_me/1]). -include_lib("test_server/include/test_server.hrl"). @@ -46,7 +48,7 @@ end_per_group(_GroupName, Config) -> cases() -> [good_call, bad_apply, bad_fun_call, badarity, - ext_badarity, otp_6061]. + ext_badarity, otp_6061, external]. init_per_testcase(_Case, Config) -> test_lib:interpret(?MODULE), @@ -244,3 +246,47 @@ test_otp_6061(Starter) -> fun() -> Starter ! working end, fun() -> Starter ! not_working end], lists:foreach(fun(P)->(lists:nth(P,PassesF))() end,Passes). + +-define(APPLY(M, F, A), (fun(Fun) -> {ok,{a,b}} = Fun({a,b}) end)(fun M:F/A)). +-define(APPLY2(M, F, A), + (fun(Map) -> + Id = fun(I) -> I end, + List = [x,y], + List = Map(Id, List), + {type,external} = erlang:fun_info(Map, type) + end)(fun M:F/A)). + +external(Config) when is_list(Config) -> + Mod = id(?MODULE), + Func = id(call_me), + Arity = id(1), + + ?APPLY(?MODULE, call_me, 1), + ?APPLY(?MODULE, call_me, Arity), + ?APPLY(?MODULE, Func, 1), + ?APPLY(?MODULE, Func, Arity), + ?APPLY(Mod, call_me, 1), + ?APPLY(Mod, call_me, Arity), + ?APPLY(Mod, Func, 1), + ?APPLY(Mod, Func, Arity), + + ListsMod = id(lists), + ListsMap = id(map), + ListsArity = id(2), + + ?APPLY2(lists, map, 2), + ?APPLY2(lists, map, ListsArity), + ?APPLY2(lists, ListsMap, 2), + ?APPLY2(lists, ListsMap, ListsArity), + ?APPLY2(ListsMod, map, 2), + ?APPLY2(ListsMod, map, ListsArity), + ?APPLY2(ListsMod, ListsMap, 2), + ?APPLY2(ListsMod, ListsMap, ListsArity), + + ok. + +call_me(I) -> + {ok,I}. + +id(I) -> + I. diff --git a/lib/stdlib/examples/erl_id_trans.erl b/lib/stdlib/examples/erl_id_trans.erl index b63acdd40a..72e41d6473 100644 --- a/lib/stdlib/examples/erl_id_trans.erl +++ b/lib/stdlib/examples/erl_id_trans.erl @@ -419,7 +419,14 @@ expr({'fun',Line,Body}) -> {'fun',Line,{clauses,Cs1}}; {function,F,A} -> {'fun',Line,{function,F,A}}; - {function,M,F,A} -> %R10B-6: fun M:F/A. + {function,M,F,A} when is_atom(M), is_atom(F), is_integer(A) -> + %% R10B-6: fun M:F/A. (Backward compatibility) + {'fun',Line,{function,M,F,A}}; + {function,M0,F0,A0} -> + %% R15: fun M:F/A with variables. + M = expr(M0), + F = expr(F0), + A = expr(A0), {'fun',Line,{function,M,F,A}} end; expr({call,Line,F0,As0}) -> diff --git a/lib/stdlib/src/erl_eval.erl b/lib/stdlib/src/erl_eval.erl index 4f4fa16040..88a0094d57 100644 --- a/lib/stdlib/src/erl_eval.erl +++ b/lib/stdlib/src/erl_eval.erl @@ -256,7 +256,8 @@ expr({'receive',_,Cs}, Bs, Lf, Ef, RBs) -> expr({'receive',_, Cs, E, TB}, Bs0, Lf, Ef, RBs) -> {value,T,Bs} = expr(E, Bs0, Lf, Ef, none), receive_clauses(T, Cs, {TB,Bs}, Bs0, Lf, Ef, [], RBs); -expr({'fun',_Line,{function,Mod,Name,Arity}}, Bs, _Lf, _Ef, RBs) -> +expr({'fun',_Line,{function,Mod0,Name0,Arity0}}, Bs0, Lf, Ef, RBs) -> + {[Mod,Name,Arity],Bs} = expr_list([Mod0,Name0,Arity0], Bs0, Lf, Ef), F = erlang:make_fun(Mod, Name, Arity), ret_expr(F, Bs, RBs); expr({'fun',_Line,{function,Name,Arity}}, _Bs0, _Lf, _Ef, _RBs) -> % R8 diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index 78b996d94b..5d45260fe9 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -2127,8 +2127,13 @@ expr({'fun',Line,Body}, Vt, St) -> true -> {[],St}; false -> {[],call_function(Line, F, A, St)} end; - {function,_M,_F,_A} -> - {[],St} + {function,M,F,A} when is_atom(M), is_atom(F), is_integer(A) -> + %% Compatibility with pre-R15 abstract format. + {[],St}; + {function,M,F,A} -> + %% New in R15. + {Bvt, St1} = expr_list([M,F,A], Vt, St), + {vtupdate(Bvt, Vt),St1} end; expr({call,_Line,{atom,_Lr,is_record},[E,{atom,Ln,Name}]}, Vt, St0) -> {Rvt,St1} = expr(E, Vt, St0), diff --git a/lib/stdlib/src/erl_parse.yrl b/lib/stdlib/src/erl_parse.yrl index 709bd83e6f..928c10f7f2 100644 --- a/lib/stdlib/src/erl_parse.yrl +++ b/lib/stdlib/src/erl_parse.yrl @@ -35,7 +35,7 @@ tuple %struct record_expr record_tuple record_field record_fields if_expr if_clause if_clauses case_expr cr_clause cr_clauses receive_expr -fun_expr fun_clause fun_clauses +fun_expr fun_clause fun_clauses atom_or_var integer_or_var try_expr try_catch try_clause try_clauses query_expr function_call argument_list exprs guard @@ -395,11 +395,17 @@ receive_expr -> 'receive' cr_clauses 'after' expr clause_body 'end' : fun_expr -> 'fun' atom '/' integer : {'fun',?line('$1'),{function,element(3, '$2'),element(3, '$4')}}. -fun_expr -> 'fun' atom ':' atom '/' integer : - {'fun',?line('$1'),{function,element(3, '$2'),element(3, '$4'),element(3,'$6')}}. +fun_expr -> 'fun' atom_or_var ':' atom_or_var '/' integer_or_var : + {'fun',?line('$1'),{function,'$2','$4','$6'}}. fun_expr -> 'fun' fun_clauses 'end' : build_fun(?line('$1'), '$2'). +atom_or_var -> atom : '$1'. +atom_or_var -> var : '$1'. + +integer_or_var -> integer : '$1'. +integer_or_var -> var : '$1'. + fun_clauses -> fun_clause : ['$1']. fun_clauses -> fun_clause ';' fun_clauses : ['$1' | '$3']. diff --git a/lib/stdlib/src/erl_pp.erl b/lib/stdlib/src/erl_pp.erl index 7dc19f2e9b..6b5aa951cf 100644 --- a/lib/stdlib/src/erl_pp.erl +++ b/lib/stdlib/src/erl_pp.erl @@ -457,8 +457,16 @@ lexpr({'fun',_,{function,F,A}}, _Prec, _Hook) -> leaf(format("fun ~w/~w", [F,A])); lexpr({'fun',_,{function,F,A},Extra}, _Prec, _Hook) -> {force_nl,fun_info(Extra),leaf(format("fun ~w/~w", [F,A]))}; -lexpr({'fun',_,{function,M,F,A}}, _Prec, _Hook) -> +lexpr({'fun',_,{function,M,F,A}}, _Prec, _Hook) + when is_atom(M), is_atom(F), is_integer(A) -> + %% For backward compatibility with pre-R15 abstract format. leaf(format("fun ~w:~w/~w", [M,F,A])); +lexpr({'fun',_,{function,M,F,A}}, _Prec, Hook) -> + %% New format in R15. + NameItem = lexpr(M, Hook), + CallItem = lexpr(F, Hook), + ArityItem = lexpr(A, Hook), + ["fun ",NameItem,$:,CallItem,$/,ArityItem]; lexpr({'fun',_,{clauses,Cs}}, _Prec, Hook) -> {list,[{first,'fun',fun_clauses(Cs, Hook)},'end']}; lexpr({'fun',_,{clauses,Cs},Extra}, _Prec, Hook) -> diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl index f5e180b4bd..2b691e6abf 100644 --- a/lib/stdlib/src/qlc.erl +++ b/lib/stdlib/src/qlc.erl @@ -1272,7 +1272,10 @@ abstr_term(Fun, Line) when is_function(Fun) -> case erlang:fun_info(Fun, type) of {type, external} -> {module, Module} = erlang:fun_info(Fun, module), - {'fun', Line, {function,Module,Name,Arity}}; + {'fun', Line, {function, + {atom,Line,Module}, + {atom,Line,Name}, + {integer,Line,Arity}}}; {type, local} -> {'fun', Line, {function,Name,Arity}} end diff --git a/lib/stdlib/test/erl_eval_SUITE.erl b/lib/stdlib/test/erl_eval_SUITE.erl index 784c7cb86e..369d8b224e 100644 --- a/lib/stdlib/test/erl_eval_SUITE.erl +++ b/lib/stdlib/test/erl_eval_SUITE.erl @@ -1036,6 +1036,12 @@ funs(Config) when is_list(Config) -> lists:usort([run_many_args(SAs) || SAs <- many_args(MaxArgs)]), ?line {'EXIT',{{argument_limit,_},_}} = (catch run_many_args(many_args1(MaxArgs+1))), + + ?line check(fun() -> M = lists, F = fun M:reverse/1, + [1,2] = F([2,1]), ok end, + "begin M = lists, F = fun M:reverse/1," + " [1,2] = F([2,1]), ok end.", + ok), ok. run_many_args({S, As}) -> diff --git a/lib/stdlib/test/erl_pp_SUITE.erl b/lib/stdlib/test/erl_pp_SUITE.erl index 280c95b1aa..64853ca078 100644 --- a/lib/stdlib/test/erl_pp_SUITE.erl +++ b/lib/stdlib/test/erl_pp_SUITE.erl @@ -116,7 +116,6 @@ func(Config) when is_list(Config) -> {func_3, <<"t() -> fun t/0.">>}, {func_4, - %% Has already been expanded away in sys_pre_expand. <<"t() -> fun modul:foo/3.">>}, {func_5, % 'when' is moved down one line <<"tkjlksjflksdjflsdjlk() @@ -127,7 +126,9 @@ func(Config) when is_list(Config) -> <<"t() -> (fun() -> true - end)().">>} + end)().">>}, + {func_7, + <<"t(M, F, A) -> fun M:F/A.">>} ], ?line compile(Config, Ts), ok. diff --git a/lib/stdlib/test/qlc_SUITE.erl b/lib/stdlib/test/qlc_SUITE.erl index 98eeaee118..8a9d8f7883 100644 --- a/lib/stdlib/test/qlc_SUITE.erl +++ b/lib/stdlib/test/qlc_SUITE.erl @@ -6632,7 +6632,7 @@ otp_7232(Config) when is_list(Config) -> {call,_, {remote,_,{atom,_,qlc},{atom,_,sort}}, [{cons,_, - {'fun',_,{function,math,sqrt,_}}, + {'fun',_,{function,{atom,_,math},{atom,_,sqrt},_}}, {cons,_, {string,_,\"<0.4.1>\"}, % could use list_to_pid.. {cons,_,{string,_,\"#Ref<\"++_},{nil,_}}}}, diff --git a/lib/syntax_tools/src/erl_syntax.erl b/lib/syntax_tools/src/erl_syntax.erl index 9df5f26454..7f58fda519 100644 --- a/lib/syntax_tools/src/erl_syntax.erl +++ b/lib/syntax_tools/src/erl_syntax.erl @@ -6093,11 +6093,16 @@ implicit_fun_name(Node) -> {'fun', Pos, {function, Atom, Arity}} -> arity_qualifier(set_pos(atom(Atom), Pos), set_pos(integer(Arity), Pos)); - {'fun', Pos, {function, Module, Atom, Arity}} -> + {'fun', Pos, {function, Module, Atom, Arity}} + when is_atom(Module), is_atom(Atom), is_integer(Arity) -> + %% Backward compatibility with pre-R15 abstract format. module_qualifier(set_pos(atom(Module), Pos), arity_qualifier( set_pos(atom(Atom), Pos), set_pos(integer(Arity), Pos))); + {'fun', Pos, {function, Module, Atom, Arity}} -> + %% New in R15: fun M:F/A. + module_qualifier(Module, arity_qualifier(Atom, Arity)); Node1 -> data(Node1) end. diff --git a/lib/tools/src/xref_reader.erl b/lib/tools/src/xref_reader.erl index d22f0df164..92f0c45c7b 100644 --- a/lib/tools/src/xref_reader.erl +++ b/lib/tools/src/xref_reader.erl @@ -158,15 +158,20 @@ expr({'try',_Line,Es,Scs,Ccs,As}, S) -> S2 = clauses(Scs, S1), S3 = clauses(Ccs, S2), expr(As, S3); -expr({call, Line, - {remote, _, {atom,_,erlang}, {atom,_,make_fun}}, - [{atom,_,Mod}, {atom,_,Fun}, {integer,_,Arity}]}, S) -> - %% Added in R10B-6. M:F/A. - expr({'fun', Line, {function, Mod, Fun, Arity}}, S); -expr({'fun', Line, {function, Mod, Name, Arity}}, S) -> - %% Added in R10B-6. M:F/A. +expr({'fun', Line, {function, {atom,_,Mod}, + {atom,_,Name}, + {integer,_,Arity}}}, S) -> + %% New format in R15. M:F/A (literals). As = lists:duplicate(Arity, {atom, Line, foo}), external_call(Mod, Name, As, Line, false, S); +expr({'fun', Line, {function, Mod, Name, {integer,_,Arity}}}, S) -> + %% New format in R15. M:F/A (one or more variables). + As = lists:duplicate(Arity, {atom, Line, foo}), + external_call(erlang, apply, [Mod, Name, list2term(As)], Line, true, S); +expr({'fun', Line, {function, Mod, Name, _Arity}}, S) -> + %% New format in R15. M:F/A (one or more variables). + As = {var, Line, '_'}, + external_call(erlang, apply, [Mod, Name, As], Line, true, S); expr({'fun', Line, {function, Name, Arity}, _Extra}, S) -> %% Added in R8. handle_call(local, S#xrefr.module, Name, Arity, Line, S); @@ -286,10 +291,10 @@ check_funarg(W, ArgsList, Line, S) -> expr(ArgsList, S1). funarg({'fun', _, _Clauses, _Extra}, _S) -> true; -funarg({var, _, Var}, S) -> member(Var, S#xrefr.funvars); -funarg({call,_,{remote,_,{atom,_,erlang},{atom,_,make_fun}},_MFA}, _S) -> - %% R10B-6. M:F/A. +funarg({'fun', _, {function,_,_,_}}, _S) -> + %% New abstract format for fun M:F/A in R15. true; +funarg({var, _, Var}, S) -> member(Var, S#xrefr.funvars); funarg(_, _S) -> false. fun_args(apply2, [FunArg, Args]) -> {FunArg, Args}; diff --git a/lib/tools/test/xref_SUITE.erl b/lib/tools/test/xref_SUITE.erl index 2f83ab4995..e0876381ca 100644 --- a/lib/tools/test/xref_SUITE.erl +++ b/lib/tools/test/xref_SUITE.erl @@ -46,7 +46,8 @@ -export([ add/1, default/1, info/1, lib/1, read/1, read2/1, remove/1, replace/1, update/1, deprecated/1, trycatch/1, - abstract_modules/1, fun_mfa/1, qlc/1]). + abstract_modules/1, fun_mfa/1, fun_mfa_r14/1, + fun_mfa_vars/1, qlc/1]). -export([ analyze/1, basic/1, md/1, q/1, variables/1, unused_locals/1]). @@ -82,7 +83,7 @@ groups() -> {files, [], [add, default, info, lib, read, read2, remove, replace, update, deprecated, trycatch, abstract_modules, fun_mfa, - qlc]}, + fun_mfa_r14, fun_mfa_vars, qlc]}, {analyses, [], [analyze, basic, md, q, variables, unused_locals]}, {misc, [], [format_error, otp_7423, otp_7831]}]. @@ -1771,6 +1772,88 @@ fun_mfa(Conf) when is_list(Conf) -> ?line ok = file:delete(Beam), ok. +%% Same as the previous test case, except that we use a BEAM file +%% that was compiled by an R14 compiler to test backward compatibility. +fun_mfa_r14(Conf) when is_list(Conf) -> + Dir = ?config(data_dir, Conf), + MFile = fname(Dir, "fun_mfa_r14"), + + A = fun_mfa_r14, + {ok, _} = xref:start(s), + {ok, A} = xref:add_module(s, MFile, {warnings,false}), + {ok, [{{{A,t,0},{'$M_EXPR','$F_EXPR',0}},[7]}, + {{{A,t,0},{A,t,0}},[6]}, + {{{A,t1,0},{'$M_EXPR','$F_EXPR',0}},[11]}, + {{{A,t1,0},{A,t,0}},[10]}, + {{{A,t2,0},{A,t,0}},[14]}, + {{{A,t3,0},{A,t3,0}},[17]}]} = + xref:q(s, "(Lin) E"), + + ok = check_state(s), + xref:stop(s), + + ok. + +%% fun M:F/A with varibles. +fun_mfa_vars(Conf) when is_list(Conf) -> + Dir = ?copydir, + File = fname(Dir, "fun_mfa_vars.erl"), + MFile = fname(Dir, "fun_mfa_vars"), + Beam = fname(Dir, "fun_mfa_vars.beam"), + Test = <<"-module(fun_mfa_vars). + + -export([t/1, t1/1, t2/3]). + + t(Mod) -> + F = fun Mod:bar/2, + (F)(a, b). + + t1(Name) -> + F = fun ?MODULE:Name/1, + (F)(a). + + t2(Mod, Name, Arity) -> + F = fun Mod:Name/Arity, + (F)(a). + + t3(Arity) -> + F = fun ?MODULE:t/Arity, + (F)(1, 2, 3). + + t4(Mod, Name) -> + F = fun Mod:Name/3, + (F)(a, b, c). + + t5(Mod, Arity) -> + F = fun Mod:t/Arity, + (F)(). + ">>, + + ok = file:write_file(File, Test), + A = fun_mfa_vars, + {ok, A} = compile:file(File, [report,debug_info,{outdir,Dir}]), + {ok, _} = xref:start(s), + {ok, A} = xref:add_module(s, MFile, {warnings,false}), + {ok, [{{{A,t,1},{'$M_EXPR','$F_EXPR',2}},[7]}, + {{{A,t,1},{'$M_EXPR',bar,2}},[6]}, + {{{A,t1,1},{'$M_EXPR','$F_EXPR',1}},[11]}, + {{{A,t1,1},{A,'$F_EXPR',1}},[10]}, + {{{A,t2,3},{'$M_EXPR','$F_EXPR',-1}},[14]}, + {{{A,t2,3},{'$M_EXPR','$F_EXPR',1}},[15]}, + {{{A,t3,1},{'$M_EXPR','$F_EXPR',3}},[19]}, + {{{A,t3,1},{fun_mfa_vars,t,-1}},[18]}, + {{{A,t4,2},{'$M_EXPR','$F_EXPR',3}},[22,23]}, + {{{A,t5,2},{'$M_EXPR','$F_EXPR',0}},[27]}, + {{{A,t5,2},{'$M_EXPR',t,-1}},[26]}]} = + xref:q(s, "(Lin) E"), + + ok = check_state(s), + xref:stop(s), + + ok = file:delete(File), + ok = file:delete(Beam), + ok. + qlc(suite) -> []; qlc(doc) -> ["OTP-5195: A bug fix when using qlc:q/1,2."]; qlc(Conf) when is_list(Conf) -> diff --git a/lib/tools/test/xref_SUITE_data/fun_mfa_r14.beam b/lib/tools/test/xref_SUITE_data/fun_mfa_r14.beam Binary files differnew file mode 100644 index 0000000000..4645525690 --- /dev/null +++ b/lib/tools/test/xref_SUITE_data/fun_mfa_r14.beam diff --git a/lib/tools/test/xref_SUITE_data/fun_mfa_r14.erl b/lib/tools/test/xref_SUITE_data/fun_mfa_r14.erl new file mode 100644 index 0000000000..293bd83a8b --- /dev/null +++ b/lib/tools/test/xref_SUITE_data/fun_mfa_r14.erl @@ -0,0 +1,18 @@ +-module(fun_mfa_r14). + +-export([t/0, t1/0, t2/0, t3/0]). + +t() -> + F = fun ?MODULE:t/0, + (F)(). + +t1() -> + F = fun t/0, + (F)(). + +t2() -> + fun ?MODULE:t/0(). + +t3() -> + fun t3/0(). + diff --git a/system/doc/reference_manual/code_loading.xml b/system/doc/reference_manual/code_loading.xml index f56e1ff408..3ea72a4057 100644 --- a/system/doc/reference_manual/code_loading.xml +++ b/system/doc/reference_manual/code_loading.xml @@ -112,8 +112,8 @@ loop() -> <c>code_switch</c> to it. The process then will make a fully qualified call to <c>m:loop()</c> and change to current code. Note that <c>m:loop/0</c> must be exported.</p> - <p>For code replacement of funs to work, the tuple syntax - <c>{Module,FunctionName}</c> must be used to represent the fun.</p> + <p>For code replacement of funs to work, the syntax + <c>fun Module:FunctionName/Arity</c> should be used.</p> </section> <section> diff --git a/system/doc/reference_manual/expressions.xml b/system/doc/reference_manual/expressions.xml index c24b1110a4..43d46d87cc 100644 --- a/system/doc/reference_manual/expressions.xml +++ b/system/doc/reference_manual/expressions.xml @@ -993,15 +993,19 @@ fun Module:Name/Arity</pre> <pre> fun (Arg1,...,ArgN) -> Name(Arg1,...,ArgN) end</pre> <p>In <c>Module:Name/Arity</c>, <c>Module</c> and <c>Name</c> are atoms - and <c>Arity</c> is an integer. + and <c>Arity</c> is an integer. Starting from the R15 release, + <c>Module</c>, <c>Name</c>, and <c>Arity</c> may also be variables. A fun defined in this way will refer to the function <c>Name</c> - with arity <c>Arity</c> in the <em>latest</em> version of module <c>Module</c>. + with arity <c>Arity</c> in the <em>latest</em> version of module + <c>Module</c>. A fun defined in this way will not be dependent on + the code for module in which it is defined. </p> <p>When applied to a number N of arguments, a tuple <c>{Module,FunctionName}</c> is interpreted as a fun, referring to the function <c>FunctionName</c> with arity N in the module <c>Module</c>. The function must be exported. - <em>This usage is deprecated.</em> + <em>This usage is deprecated.</em> Use <c>fun Module:Name/Arity</c> + instead. See <seealso marker="#calls">Function Calls</seealso> for an example.</p> <p>More examples can be found in <em>Programming Examples</em>.</p> </section> |