peek_token_bracket
token_len = peek_token_bracket (token, regexp, syntax);
token_len = peek_token_bracket (token, regexp, syntax);
token_len = peek_token_bracket (token, regexp, syntax);
token_len2 = peek_token_bracket (&token2, regexp, syntax);
token_len = peek_token_bracket (token, regexp, syntax);
(void) peek_token_bracket (&token2, regexp, syntax);