nonblocking_substitution : delays lvalue LE delays rvalue SEMICOLON

def p_nonblocking_substitution(self, p):
        'nonblocking_substitution : delays lvalue LE delays rvalue SEMICOLON'
        p[0] = NonblockingSubstitution(
            p[2], p[5], p[1], p[4], lineno=p.lineno(2))
        p.set_lineno(0, p.lineno(2))