mojom: Add associative arrays to the mojom language.

mojo/public/tools/bindings/pylib/mojom/parse/parser.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.
 
 """Generates a syntax tree from a Mojo IDL file."""
 
 import imp
 import os.path
 import sys
 
@@ skipping 219 matching lines @@
                 | nonnullable_typename"""
     if len(p) == 2:
       p[0] = p[1]
     else:
       p[0] = p[1] + "?"
 
   def p_nonnullable_typename(self, p):
     """nonnullable_typename : basictypename
                             | array
                             | fixed_array
+                            | associative_array
                             | interfacerequest"""
     p[0] = p[1]
 
   def p_basictypename(self, p):
     """basictypename : identifier
                      | handletype"""
     p[0] = p[1]
 
   def p_handletype(self, p):
     """handletype : HANDLE
@@ skipping 18 matching lines @@
 
   def p_fixed_array(self, p):
     """fixed_array : ARRAY LANGLE typename COMMA INT_CONST_DEC RANGLE"""
     value = int(p[5])
     if value == 0 or value > _MAX_ARRAY_SIZE:
       raise ParseError(self.filename, "Fixed array size %d invalid" % value,
                        lineno=p.lineno(5),
                        snippet=self._GetSnippet(p.lineno(5)))
     p[0] = p[3] + "[" + p[5] + "]"
 
+  def p_associative_array(self, p):
+    """associative_array : MAP LANGLE identifier COMMA typename RANGLE"""
+    p[0] = p[5] + "{" + p[3] + "}"
+
   def p_interfacerequest(self, p):
     """interfacerequest : identifier AMP"""
     p[0] = p[1] + "&"
 
   def p_ordinal_1(self, p):
     """ordinal : """
     p[0] = None
 
   def p_ordinal_2(self, p):
     """ordinal : ORDINAL"""
@@ skipping 86 matching lines @@
 
 def Parse(source, filename):
   lexer = Lexer(filename)
   parser = Parser(lexer, source, filename)
 
   lex.lex(object=lexer)
   yacc.yacc(module=parser, debug=0, write_tables=0)
 
   tree = yacc.parse(source)
   return tree