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authorErlang/OTP <[email protected]>2010-04-23 04:32:51 +0000
committerErlang/OTP <[email protected]>2010-04-23 04:32:51 +0000
commitc725744dc889d43a66883ac54b778fca2083a2b4 (patch)
treec5c03b58be9db2832df98797d615300a048d92d5 /lib
parent280317139a17259fd7bf1dd8bbc95bee52c053b0 (diff)
parent45c380d1b77198449fb8e3beadb39dc8f77abb72 (diff)
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Merge branch 'ta/nested-records' into dev
* ta/nested-records: Document R14 paren-less record access/update Support nested record field access without parentheses OTP-8597 ta/nested-records Nested records can now be accessed without parenthesis. See the Reference Manual for examples. (Thanks to YAMASHINA Hio and Tuncer Ayaz.)
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/test/record_SUITE.erl39
-rw-r--r--lib/stdlib/src/erl_parse.yrl4
2 files changed, 36 insertions, 7 deletions
diff --git a/lib/compiler/test/record_SUITE.erl b/lib/compiler/test/record_SUITE.erl
index bd2ffd7f65..f26ff769c7 100644
--- a/lib/compiler/test/record_SUITE.erl
+++ b/lib/compiler/test/record_SUITE.erl
@@ -1,19 +1,19 @@
%%
%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
-%%
+%%
+%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
+%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
-%%
+%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
-%%
+%%
%% %CopyrightEnd%
%%
%%% Purpose : Test records.
@@ -24,7 +24,7 @@
-export([all/1,init_per_testcase/2,fin_per_testcase/2,
errors/1,record_test_2/1,record_test_3/1,record_access_in_guards/1,
- guard_opt/1,eval_once/1,foobar/1,missing_test_heap/1]).
+ guard_opt/1,eval_once/1,foobar/1,missing_test_heap/1, nested_access/1]).
init_per_testcase(_Case, Config) ->
?line Dog = test_server:timetrap(test_server:minutes(2)),
@@ -38,7 +38,7 @@ fin_per_testcase(_Case, Config) ->
all(suite) ->
test_lib:recompile(?MODULE),
[errors,record_test_2,record_test_3,record_access_in_guards,
- guard_opt,eval_once,foobar,missing_test_heap].
+ guard_opt,eval_once,foobar,missing_test_heap,nested_access].
-record(foo, {a,b,c,d}).
-record(bar, {a,b,c,d}).
@@ -522,4 +522,29 @@ missing_test_heap_1(A = #foo_rec {foo_1 = _B,
foo_3 = C + 1,
foo_2 = D + 1}.
+-record(nrec0, {name = <<"nested0">>}).
+-record(nrec1, {name = <<"nested1">>, nrec0=#nrec0{}}).
+-record(nrec2, {name = <<"nested2">>, nrec1=#nrec1{}}).
+
+nested_access(Config) when is_list(Config) ->
+ N0 = #nrec0{},
+ N1 = #nrec1{},
+ N2 = #nrec2{},
+ ?line <<"nested0">> = N0#nrec0.name,
+ ?line <<"nested1">> = N1#nrec1.name,
+ ?line <<"nested2">> = N2#nrec2.name,
+ ?line <<"nested0">> = N1#nrec1.nrec0#nrec0.name,
+ ?line <<"nested0">> = N2#nrec2.nrec1#nrec1.nrec0#nrec0.name,
+ ?line <<"nested1">> = N2#nrec2.nrec1#nrec1.name,
+ ?line <<"nested0">> = ((N2#nrec2.nrec1)#nrec1.nrec0)#nrec0.name,
+
+ N1a = N2#nrec2.nrec1#nrec1{name = <<"nested1a">>},
+ ?line <<"nested1a">> = N1a#nrec1.name,
+
+ N2a = N2#nrec2.nrec1#nrec1.nrec0#nrec0{name = <<"nested0a">>},
+ N2b = ((N2#nrec2.nrec1)#nrec1.nrec0)#nrec0{name = <<"nested0a">>},
+ ?line <<"nested0a">> = N2a#nrec0.name,
+ ?line N2a = N2b,
+ ok.
+
id(I) -> I.
diff --git a/lib/stdlib/src/erl_parse.yrl b/lib/stdlib/src/erl_parse.yrl
index 7145cf13fd..69807aad83 100644
--- a/lib/stdlib/src/erl_parse.yrl
+++ b/lib/stdlib/src/erl_parse.yrl
@@ -335,6 +335,10 @@ record_expr -> expr_max '#' atom '.' atom :
{record_field,?line('$2'),'$1',element(3, '$3'),'$5'}.
record_expr -> expr_max '#' atom record_tuple :
{record,?line('$2'),'$1',element(3, '$3'),'$4'}.
+record_expr -> record_expr '#' atom '.' atom :
+ {record_field,?line('$2'),'$1',element(3, '$3'),'$5'}.
+record_expr -> record_expr '#' atom record_tuple :
+ {record,?line('$2'),'$1',element(3, '$3'),'$4'}.
record_tuple -> '{' '}' : [].
record_tuple -> '{' record_fields '}' : '$2'.