runtime/Python/tests/t007lexer.g - platform/external/antlr - Git at Google

 lexer grammar t007lexer;
 options {
   language = Python;
 }

 FOO: 'f' ('o' | 'a' 'b'+)*;
	lexer grammar t007lexer;
	options {
	language = Python;
	}

	FOO: 'f' ('o' \| 'a' 'b'+)*;