def p_IndexType(self, p):
n = len(p)<EOL>if n == <NUM_LIT:2>:<EOL><INDENT>p[<NUM_LIT:0>] = (<NUM_LIT:0>, p[<NUM_LIT:1>])<EOL><DEDENT>elif n == <NUM_LIT:3>:<EOL><INDENT>p[<NUM_LIT:0>] = (<NUM_LIT:1>, p[<NUM_LIT:2>])<EOL><DEDENT>
IndexType : IMPLIED Index
                     | Index