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-rw-r--r--lib/tools/src/xref_reader.erl55
1 files changed, 44 insertions, 11 deletions
diff --git a/lib/tools/src/xref_reader.erl b/lib/tools/src/xref_reader.erl
index 41b93caaeb..6c4a1c4d8e 100644
--- a/lib/tools/src/xref_reader.erl
+++ b/lib/tools/src/xref_reader.erl
@@ -42,17 +42,15 @@
%% experimental; -xref(FunEdge) is recognized.
lattrs=[], % local calls, {{mfa(),mfa()},Line}
xattrs=[], % external calls, -"-
- battrs=[] % badly formed xref attributes, term().
+ battrs=[] % badly formed xref attributes, term().
}).
-include("xref.hrl").
-%% sys_pre_expand has modified the forms slightly compared to what
-%% erl_id_trans recognizes.
-
%% The versions of the abstract code are as follows:
-%% R7: abstract_v1
-%% R8: abstract_v2
+%% R7: abstract_v1
+%% R8: abstract_v2
+%% R9C: raw_abstract_v1
%% -> {ok, Module, {DefAt, CallAt, LC, XC, X, Attrs}, Unresolved}} | EXIT
%% Attrs = {ALC, AXC, Bad}
@@ -92,7 +90,12 @@ form({function, Anno, Name, Arity, Clauses}, S) ->
Line = erl_anno:line(Anno),
S2 = S1#xrefr{def_at = [{MFA,Line} | S#xrefr.def_at]},
S3 = clauses(Clauses, S2),
- S3#xrefr{function = []}.
+ S3#xrefr{function = []};
+form(_, S) ->
+ %% OTP 20. Other uninteresting forms such as {eof, _} and {warning, _}.
+ %% Exposed because sys_pre_expand is no longer run.
+ S.
+
clauses(Cls, S) ->
#xrefr{funvars = FunVars, matches = Matches} = S,
@@ -109,6 +112,8 @@ clauses([{clause, _Line, _H, G, B} | Cs], FunVars, Matches, S) ->
clauses([], _FunVars, _Matches, S) ->
S.
+attr(NotList, Ln, M, Fun, AL, AX, B, S) when not is_list(NotList) ->
+ attr([NotList], Ln, M, Fun, AL, AX, B, S);
attr([E={From, To} | As], Ln, M, Fun, AL, AX, B, S) ->
case mfa(From, M) of
{_, _, MFA} when MFA =:= Fun; [] =:= Fun ->
@@ -154,6 +159,15 @@ expr({'try',_Line,Es,Scs,Ccs,As}, S) ->
S2 = clauses(Scs, S1),
S3 = clauses(Ccs, S2),
expr(As, S3);
+expr({'fun', Line, {function,M,F,A}}, S)
+ when is_atom(M), is_atom(F), is_integer(A) ->
+ %% This is the old format for external funs, generated by a pre-R15
+ %% compiler. Exposed in OTP 20 because sys_pre_expand is no longer
+ %% run.
+ Fun = {'fun', Line, {function, {atom,Line,M},
+ {atom,Line,F},
+ {integer,Line,A}}},
+ expr(Fun, S);
expr({'fun', Line, {function, {atom,_,Mod},
{atom,_,Name},
{integer,_,Arity}}}, S) ->
@@ -168,14 +182,21 @@ 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);
+%% Only abstract_v1 and abstract_v2.
expr({'fun', Line, {function, Name, Arity}, _Extra}, S) ->
%% Added in R8.
handle_call(local, S#xrefr.module, Name, Arity, Line, S);
expr({'fun', _Line, {clauses, Cs}, _Extra}, S) ->
clauses(Cs, S);
-expr({named_fun, _Line, '_', Cs, _Extra}, S) ->
+%% End abstract_v1 and abstract_v2.
+expr({'fun', Line, {function, Name, Arity}}, S) ->
+ %% Added in OTP 20.
+ handle_call(local, S#xrefr.module, Name, Arity, Line, S);
+expr({'fun', _Line, {clauses, Cs}}, S) ->
+ clauses(Cs, S);
+expr({named_fun, _Line, '_', Cs}, S) ->
clauses(Cs, S);
-expr({named_fun, _Line, Name, Cs, _Extra}, S) ->
+expr({named_fun, _Line, Name, Cs}, S) ->
S1 = S#xrefr{funvars = [Name | S#xrefr.funvars]},
clauses(Cs, S1);
expr({call, Line, {atom, _, Name}, As}, S) ->
@@ -193,7 +214,12 @@ expr({match, _Line, {var,_,Var}, {'fun', _, {clauses, Cs}, _Extra}}, S) ->
%% that are passed around by the "expansion" of list comprehension.
S1 = S#xrefr{funvars = [Var | S#xrefr.funvars]},
clauses(Cs, S1);
-expr({match, _Line, {var,_,Var}, {named_fun, _, _, _, _} = Fun}, S) ->
+expr({match, _Line, {var,_,Var}, {'fun', _, {clauses, Cs}}}, S) ->
+ %% OTP 20. Exposed because sys_pre_expand is no longer run.
+ S1 = S#xrefr{funvars = [Var | S#xrefr.funvars]},
+ clauses(Cs, S1);
+expr({match, _Line, {var,_,Var}, {named_fun, _, _, _} = Fun}, S) ->
+ %% OTP 20. Exposed because sys_pre_expand is no longer run.
S1 = S#xrefr{funvars = [Var | S#xrefr.funvars]},
expr(Fun, S1);
expr({match, _Line, {var,_,Var}, E}, S) ->
@@ -295,10 +321,17 @@ check_funarg(W, ArgsList, Line, S) ->
expr(ArgsList, S1).
funarg({'fun', _, _Clauses, _Extra}, _S) -> true;
+funarg({'fun', _, {clauses, _}}, _S) ->
+ %% OTP 20. sys_pre_expand not run.
+ true;
+funarg({'fun', _, {function, _, _}}, _S) ->
+ %% OTP 20. sys_pre_expand not run.
+ true;
funarg({'fun', _, {function,_,_,_}}, _S) ->
%% New abstract format for fun M:F/A in R15.
true;
-funarg({named_fun, _, _, _, _}, _S) ->
+funarg({named_fun, _, _, _}, _S) ->
+ %% OTP 20. sys_pre_expand not run.
true;
funarg({var, _, Var}, S) -> member(Var, S#xrefr.funvars);
funarg(_, _S) -> false.