def p_IndexType(self, p):
        """IndexType : IMPLIED Index
                     | Index"""
        n = len(p)
        if n == 2:
            p[0] = (0, p[1])
        elif n == 3:
            p[0] = (1, p[2])
def p_IndexType(self, p):
        """IndexType : IMPLIED Index
                     | Index"""
        n = len(p)
        if n == 2:
            p[0] = (0, p[1])
        elif n == 3:
            p[0] = (1, p[2])
def p_IndexType ( self , p ) : n = len ( p ) if n == 2 : p [ 0 ] = ( 0 , p [ 1 ] ) elif n == 3 : p [ 0 ] = ( 1 , p [ 2 ] )
IndexType : IMPLIED Index
                     | Index
IndexType : IMPLIED Index | Index