Remove :[] as a valid atom and do not allow remote container calls

Author: José Valim

lib/elixir/lib/inspect.ex

@@ -100,7 +100,7 @@ defimpl Inspect, for: Atom do
       valid_ref_identifier?(binary) ->
         "Elixir." <> rest = binary
         rest
-      atom in [:{}, :[], :<<>>] ->
+      atom in [:{}, :<<>>] ->
         ":" <> binary
       atom in Macro.binary_ops or atom in Macro.unary_ops ->
         ":" <> binary

lib/elixir/src/elixir_tokenizer.erl

@@ -4,8 +4,7 @@
 -import(elixir_interpolation, [unescape_chars/1, unescape_tokens/1]).
 
 -define(container(T1, T2),
-  T1 == ${, T2 == $};
-  T1 == $[, T2 == $]
+  T1 == ${, T2 == $}
 ).
 
 -define(at_op(T),
@@ -224,13 +223,6 @@ tokenize([$.,T|Tail], Line, Scope, Tokens) when ?is_space(T) ->
     [_|Rest]       -> tokenize([$.|Rest], Line, Scope, Tokens)
   end;
 
-% ## Containers
-tokenize(".<<>>" ++ Rest, Line, Scope, Tokens) ->
-  handle_call_identifier(Rest, Line, '<<>>', Scope, Tokens);
-
-tokenize([$.,T1,T2|Rest], Line, Scope, Tokens) when ?container(T1, T2) ->
-  handle_call_identifier(Rest, Line, list_to_atom([T1, T2]), Scope, Tokens);
-
 % ## Three Token Operators
 tokenize([$.,T1,T2,T3|Rest], Line, Scope, Tokens) when
     ?unary_op3(T1, T2, T3); ?comp_op3(T1, T2, T3); ?and_op3(T1, T2, T3); ?or_op3(T1, T2, T3);

lib/elixir/test/elixir/inspect_test.exs

@@ -44,7 +44,6 @@ defmodule Inspect.AtomTest do
 
   test :container do
     assert inspect(:<<>>) == ":<<>>"
-    assert inspect(:[])   == ":[]"
     assert inspect(:{})   == ":{}"
   end
 end