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-rw-r--r--erts/doc/src/absform.xml3
-rw-r--r--erts/emulator/test/code_SUITE.erl3
-rw-r--r--lib/compiler/src/sys_pre_expand.erl11
-rw-r--r--lib/compiler/src/v3_core.erl7
-rw-r--r--lib/compiler/test/fun_SUITE.erl52
-rw-r--r--lib/debugger/src/dbg_ieval.erl15
-rw-r--r--lib/debugger/src/dbg_iload.erl8
-rw-r--r--lib/debugger/test/fun_SUITE.erl52
-rw-r--r--lib/stdlib/examples/erl_id_trans.erl9
-rw-r--r--lib/stdlib/src/erl_eval.erl3
-rw-r--r--lib/stdlib/src/erl_lint.erl9
-rw-r--r--lib/stdlib/src/erl_parse.yrl12
-rw-r--r--lib/stdlib/src/erl_pp.erl10
-rw-r--r--lib/stdlib/src/qlc.erl5
-rw-r--r--lib/stdlib/test/erl_eval_SUITE.erl6
-rw-r--r--lib/stdlib/test/erl_pp_SUITE.erl5
-rw-r--r--lib/stdlib/test/qlc_SUITE.erl2
-rw-r--r--lib/syntax_tools/src/erl_syntax.erl7
-rw-r--r--lib/tools/src/xref_reader.erl25
-rw-r--r--lib/tools/test/xref_SUITE.erl87
-rw-r--r--lib/tools/test/xref_SUITE_data/fun_mfa_r14.beambin0 -> 1116 bytes
-rw-r--r--lib/tools/test/xref_SUITE_data/fun_mfa_r14.erl18
-rw-r--r--system/doc/reference_manual/expressions.xml3
23 files changed, 315 insertions, 37 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/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/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
new file mode 100644
index 0000000000..4645525690
--- /dev/null
+++ b/lib/tools/test/xref_SUITE_data/fun_mfa_r14.beam
Binary files differ
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/expressions.xml b/system/doc/reference_manual/expressions.xml
index 4d211ae1d3..43d46d87cc 100644
--- a/system/doc/reference_manual/expressions.xml
+++ b/system/doc/reference_manual/expressions.xml
@@ -993,7 +993,8 @@ 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>. A fun defined in this way will not be dependent on
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 19:19:29 +0000