Mojo: Mojom: Don't allow $ in identifiers.

mojo/public/tools/bindings/pylib/mojom/parse/lexer.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import imp
 import os.path
 import sys
 
 # Disable lint check for finding modules:
 # pylint: disable=F0401
@@ skipping 95 matching lines @@
     'LBRACE', 'RBRACE',         # { }
     'LANGLE', 'RANGLE',         # < >
     'SEMI',                     # ;
     'COMMA', 'DOT'              # , .
   )
 
   ##
   ## Regexes for use in tokens
   ##
 
-  # valid C identifiers (K&R2: A.2.3), plus '$' (supported by some compilers)
-  identifier = r'[a-zA-Z_$][0-9a-zA-Z_$]*'
+  # valid C identifiers (K&R2: A.2.3)
+  identifier = r'[a-zA-Z_][0-9a-zA-Z_]*'
 
   hex_prefix = '0[xX]'
   hex_digits = '[0-9a-fA-F]+'
 
   # integer constants (K&R2: A.2.5.1)
   integer_suffix_opt = \
       r'(([uU]ll)|([uU]LL)|(ll[uU]?)|(LL[uU]?)|([uU][lL])|([lL][uU]?)|[uU])?'
   decimal_constant = \
       '(0'+integer_suffix_opt+')|([1-9][0-9]*'+integer_suffix_opt+')'
   octal_constant = '0[0-7]*'+integer_suffix_opt
@@ skipping 156 matching lines @@
     return t
 
   # Ignore C and C++ style comments
   def t_COMMENT(self, t):
     r'(/\*(.|\n)*?\*/)|(//.*(\n[ \t]*//.*)*)'
     pass
 
   def t_error(self, t):
     msg = 'Illegal character %s' % repr(t.value[0])
     self._error(msg, t)