locexpr() always returns a ForwardReference if it can't lookup it.
Chris Pressey
3 years ago
| 356 | 356 | accum.append(self.locexpr()) |
| 357 | 357 | return accum |
| 358 | 358 | |
| 359 | def locexpr(self, forward=False): | |
| 359 | def locexpr(self): | |
| 360 | 360 | if self.scanner.token in ('on', 'off', 'word') or self.scanner.token in self.context.consts or self.scanner.on_type('integer literal'): |
| 361 | 361 | return self.const() |
| 362 | elif forward: | |
| 362 | else: | |
| 363 | 363 | name = self.scanner.token |
| 364 | 364 | self.scanner.scan() |
| 365 | return ForwardReference(name) | |
| 366 | else: | |
| 367 | loc = self.lookup(self.scanner.token) | |
| 368 | self.scanner.scan() | |
| 369 | return loc | |
| 370 | ||
| 371 | def indlocexpr(self, forward=False): | |
| 365 | loc = self.context.fetch(name) | |
| 366 | if loc: | |
| 367 | return loc | |
| 368 | else: | |
| 369 | return ForwardReference(name) | |
| 370 | ||
| 371 | def indlocexpr(self): | |
| 372 | 372 | if self.scanner.consume('['): |
| 373 | 373 | loc = self.locexpr() |
| 374 | 374 | self.scanner.expect(']') |
| 379 | 379 | loc = self.locexpr() |
| 380 | 380 | return AddressRef(loc) |
| 381 | 381 | else: |
| 382 | return self.indexed_locexpr(forward=forward) | |
| 383 | ||
| 384 | def indexed_locexpr(self, forward=False): | |
| 385 | loc = self.locexpr(forward=forward) | |
| 382 | return self.indexed_locexpr() | |
| 383 | ||
| 384 | def indexed_locexpr(self): | |
| 385 | loc = self.locexpr() | |
| 386 | 386 | if not isinstance(loc, str): |
| 387 | 387 | index = None |
| 388 | 388 | if self.scanner.consume('+'): |
| 482 | 482 | elif self.scanner.token in ("copy",): |
| 483 | 483 | opcode = self.scanner.token |
| 484 | 484 | self.scanner.scan() |
| 485 | src = self.indlocexpr(forward=True) | |
| 485 | src = self.indlocexpr() | |
| 486 | 486 | self.scanner.expect(',') |
| 487 | 487 | dest = self.indlocexpr() |
| 488 | 488 | instr = SingleOp(self.scanner.line_number, opcode=opcode, dest=dest, src=src) |