scan2
scan2(TOK_VERSION, TOK_RBRACE, &tok);
scan2(TOK_COMMA, TOK_RBRACE, &tok);
scan2(TOK_IDENT, TOK_STRCONST, &tok);
scan2(TOK_IDENT, TOK_CHARCONST, &tok);
scan2(TOK_IDENT, TOK_CHARCONST, &tok);
scan2(TOK_STAR, TOK_IDENT, &tok);
void scan2(tok_kind expect1, tok_kind expect2, token *tokp);