Given a fragment for a, returns a fragment for a? or a?? (if nongreedy)
| 345 | |
| 346 | // Given a fragment for a, returns a fragment for a? or a?? (if nongreedy) |
| 347 | Frag Compiler::Quest(Frag a, bool nongreedy) { |
| 348 | if (IsNoMatch(a)) |
| 349 | return Nop(); |
| 350 | int id = AllocInst(1); |
| 351 | if (id < 0) |
| 352 | return NoMatch(); |
| 353 | PatchList pl; |
| 354 | if (nongreedy) { |
| 355 | inst_[id].InitAlt(0, a.begin); |
| 356 | pl = PatchList::Mk(id << 1); |
| 357 | } else { |
| 358 | inst_[id].InitAlt(a.begin, 0); |
| 359 | pl = PatchList::Mk((id << 1) | 1); |
| 360 | } |
| 361 | return Frag(id, PatchList::Append(inst_.data(), pl, a.end)); |
| 362 | } |
| 363 | |
| 364 | // Returns a fragment for the byte range lo-hi. |
| 365 | Frag Compiler::ByteRange(int lo, int hi, bool foldcase) { |