static Renode *parserep(struct cstate *g)
{
Renode *atom;
if (accept(g, '^')) return newnode(g, P_BOL);
if (accept(g, '$')) return newnode(g, P_EOL);
if (accept(g, L_WORD)) return newnode(g, P_WORD);
if (accept(g, L_NWORD)) return newnode(g, P_NWORD);
atom = parseatom(g);
if (g->lookahead == L_COUNT) {
int min = g->yymin, max = g->yymax;
next(g);
if (max < min)
die(g, "invalid quantifier");
return newrep(g, atom, accept(g, '?'), min, max);
}
if (accept(g, '*')) return newrep(g, atom, accept(g, '?'), 0, REPINF);
if (accept(g, '+')) return newrep(g, atom, accept(g, '?'), 1, REPINF);
if (accept(g, '?')) return newrep(g, atom, accept(g, '?'), 0, 1);
return atom;
}
static Renode *parserep(void)
{
Renode *atom;
if (re_accept('^')) return newnode(P_BOL);
if (re_accept('$')) return newnode(P_EOL);
if (re_accept(L_WORD)) return newnode(P_WORD);
if (re_accept(L_NWORD)) return newnode(P_NWORD);
atom = parseatom();
if (g.lookahead == L_COUNT) {
int min = g.yymin, max = g.yymax;
next();
if (max < min)
die("invalid quantifier");
return newrep(atom, re_accept('?'), min, max);
}
if (re_accept('*')) return newrep(atom, re_accept('?'), 0, REPINF);
if (re_accept('+')) return newrep(atom, re_accept('?'), 1, REPINF);
if (re_accept('?')) return newrep(atom, re_accept('?'), 0, 1);
return atom;
}