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-rw-r--r--lib/syntax_tools/src/erl_prettypr.erl5
-rw-r--r--lib/syntax_tools/test/syntax_tools_SUITE.erl36
-rw-r--r--lib/syntax_tools/test/syntax_tools_SUITE_data/specs_and_funs.erl18
3 files changed, 54 insertions, 5 deletions
diff --git a/lib/syntax_tools/src/erl_prettypr.erl b/lib/syntax_tools/src/erl_prettypr.erl
index 6906ef1553..6ad9bec2e6 100644
--- a/lib/syntax_tools/src/erl_prettypr.erl
+++ b/lib/syntax_tools/src/erl_prettypr.erl
@@ -1101,8 +1101,9 @@ lay_2(Node, Ctxt) ->
Ctxt1 = reset_prec(Ctxt),
D1 = lay(erl_syntax:constrained_function_type_body(Node),
Ctxt1),
+ Ctxt2 = Ctxt1#ctxt{clause = undefined},
D2 = lay(erl_syntax:constrained_function_type_argument(Node),
- Ctxt1),
+ Ctxt2),
beside(D1,
beside(floating(text(" when ")), D2));
@@ -1113,7 +1114,7 @@ lay_2(Node, Ctxt) ->
_ ->
{"fun(", ")"}
end,
- Ctxt1 = reset_prec(Ctxt),
+ Ctxt1 = (reset_prec(Ctxt))#ctxt{clause = undefined},
D1 = case erl_syntax:function_type_arguments(Node) of
any_arity ->
text("(...)");
diff --git a/lib/syntax_tools/test/syntax_tools_SUITE.erl b/lib/syntax_tools/test/syntax_tools_SUITE.erl
index 9dbd0e302a..6b42f7a0a1 100644
--- a/lib/syntax_tools/test/syntax_tools_SUITE.erl
+++ b/lib/syntax_tools/test/syntax_tools_SUITE.erl
@@ -26,14 +26,14 @@
-export([app_test/1,appup_test/1,smoke_test/1,revert/1,revert_map/1,
revert_map_type/1,
t_abstract_type/1,t_erl_parse_type/1,t_type/1, t_epp_dodger/1,
- t_comment_scan/1,t_igor/1,t_erl_tidy/1]).
+ t_comment_scan/1,t_igor/1,t_erl_tidy/1,t_prettypr/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[app_test,appup_test,smoke_test,revert,revert_map,revert_map_type,
t_abstract_type,t_erl_parse_type,t_type,t_epp_dodger,
- t_comment_scan,t_igor,t_erl_tidy].
+ t_comment_scan,t_igor,t_erl_tidy,t_prettypr].
groups() ->
[].
@@ -300,6 +300,14 @@ t_comment_scan(Config) when is_list(Config) ->
ok = test_comment_scan(Filenames,DataDir),
ok.
+t_prettypr(Config) when is_list(Config) ->
+ DataDir = ?config(data_dir, Config),
+ PrivDir = ?config(priv_dir, Config),
+ Filenames = ["type_specs.erl",
+ "specs_and_funs.erl"],
+ ok = test_prettypr(Filenames,DataDir,PrivDir),
+ ok.
+
test_files(Config) ->
DataDir = ?config(data_dir, Config),
[ filename:join(DataDir,Filename) || Filename <- test_files() ].
@@ -307,7 +315,8 @@ test_files(Config) ->
test_files() ->
["syntax_tools_SUITE_test_module.erl",
"syntax_tools_test.erl",
- "type_specs.erl"].
+ "type_specs.erl",
+ "specs_and_funs.erl"].
t_igor(Config) when is_list(Config) ->
DataDir = ?config(data_dir, Config),
@@ -359,6 +368,27 @@ test_comment_scan([File|Files],DataDir) ->
test_comment_scan(Files,DataDir).
+test_prettypr([],_,_) -> ok;
+test_prettypr([File|Files],DataDir,PrivDir) ->
+ Filename = filename:join(DataDir,File),
+ io:format("Parsing ~p~n", [Filename]),
+ {ok, Fs0} = epp:parse_file(Filename, [], []),
+ Fs = erl_syntax:form_list(Fs0),
+ PP = erl_prettypr:format(Fs, [{paper, 120}, {ribbon, 110}]),
+ io:put_chars(PP),
+ OutFile = filename:join(PrivDir, File),
+ ok = file:write_file(OutFile,iolist_to_binary(PP)),
+ io:format("Parsing OutFile: ~s~n", [OutFile]),
+ {ok, Fs2} = epp:parse_file(OutFile, [], []),
+ case [Error || {error, _} = Error <- Fs2] of
+ [] ->
+ ok;
+ Errors ->
+ ?t:fail(Errors)
+ end,
+ test_prettypr(Files,DataDir,PrivDir).
+
+
test_epp_dodger([], _, _) -> ok;
test_epp_dodger([Filename|Files],DataDir,PrivDir) ->
io:format("Parsing ~p~n", [Filename]),
diff --git a/lib/syntax_tools/test/syntax_tools_SUITE_data/specs_and_funs.erl b/lib/syntax_tools/test/syntax_tools_SUITE_data/specs_and_funs.erl
new file mode 100644
index 0000000000..8dfeaf5a6b
--- /dev/null
+++ b/lib/syntax_tools/test/syntax_tools_SUITE_data/specs_and_funs.erl
@@ -0,0 +1,18 @@
+-module(specs_and_funs).
+
+-export([my_apply/3, two/1]).
+
+%% OTP-15519, ERL-815
+
+-spec my_apply(Fun, Arg, fun((A) -> A)) -> Result when
+ Fun :: fun((Arg) -> Result),
+ Arg :: any(),
+ Result :: any().
+
+my_apply(Fun, Arg, _) ->
+ Fun(Arg).
+
+-spec two(fun((A) -> A)) -> fun((B) -> B).
+
+two(F) ->
+ F(fun(X) -> X end).