Accept any identifier as attribute (Fixes #177)

Now, the . for looking up an attribute of a variable will bypass any other reserved meaning that the
indentifier may normally hold. So, in a way, the attribute lookup opertaion short-circuits the
keyword mechanism. Which makes sense, as it won't make sense to put a keyword after the dot any way.

NEWS.md

@@ -6,4 +6,6 @@ Standards](http://www.gnu.org/prep/standards/html_node/NEWS-File.html#NEWS-File)
 
 ## master (upcoming release)
 
-* Fixed issue with generated code for `for` loops (#167).
+* Fix issue with generated code for `for` loops (#167).
+
+* Fix issue with using keywords as attributes (#177).

src/erlydtl_scanner.erl

@@ -36,7 +36,7 @@
 %%%-------------------------------------------------------------------
 -module(erlydtl_scanner).
 
-%% This file was generated 2014-04-15 19:15:09 UTC by slex 0.2.1.
+%% This file was generated 2014-06-29 19:46:00 UTC by slex 0.2.1-2-g7814678.
 %% http://github.com/erlydtl/slex
 -slex_source(["src/erlydtl_scanner.slex"]).
 
@@ -563,6 +563,10 @@ post_process([{open_tag, _, _} | _],
 post_process([{open_tag, _, _} | _],
 	     {identifier, _, L} = T, _) ->
     is_keyword(open_tag, T);
+post_process([{'.', _} | _], {identifier, _, L} = T,
+	     _) ->
+    setelement(3, T,
+	       begin L1 = lists:reverse(L), L2 = to_atom(L1), L2 end);
 post_process(_, {identifier, _, L} = T, close_tag) ->
     is_keyword(close_tag, T);
 post_process(_, {identifier, _, L} = T, _) ->

src/erlydtl_scanner.slex

@@ -266,6 +266,7 @@ close_tag: to_atom.
 
 open_tag identifier, close_tag: expr is_keyword(all, T) end.
 open_tag identifier: expr is_keyword(open_tag, T) end.
+\. - identifier: lists reverse, to_atom.
 identifier, close_tag: expr is_keyword(close_tag, T) end.
 identifier: expr is_keyword(any, T) end.
 

test/erlydtl_test_defs.erl

@@ -139,7 +139,11 @@ all_test_defs() ->
        {"Index all tuple elements 1-based (selected at render time)",
         <<"{{ var1.1 }},{{ var1.2 }},{{ var1.3 }}.">>,
         [{var1, {a, b, c}}], [], [{tuples_0_based, defer}],
-        <<"a,b,c.">>}
+        <<"a,b,c.">>},
+       {"Index tuple using a \"reserved\" keyword",
+        <<"{{ list.count }}">>,
+        [{list, [{count, 123}]}],
+        <<"123">>}
       ]},
      {"now",
       [{"now functional",