| 34 | |
| 35 | |
| 36 | class _Token(object): |
| 37 | def __init__(self, i_line, instruction=None, tok=_SENTINEL, priority=0, after=None, end_of_line=False): |
| 38 | """ |
| 39 | :param i_line: |
| 40 | :param instruction: |
| 41 | :param tok: |
| 42 | :param priority: |
| 43 | :param after: |
| 44 | :param end_of_line: |
| 45 | Marker to signal only after all the other tokens have been written. |
| 46 | """ |
| 47 | self.i_line = i_line |
| 48 | if tok is not _SENTINEL: |
| 49 | self.tok = tok |
| 50 | else: |
| 51 | if instruction is not None: |
| 52 | if inspect.iscode(instruction.argval): |
| 53 | self.tok = "" |
| 54 | else: |
| 55 | self.tok = str(instruction.argval) |
| 56 | else: |
| 57 | raise AssertionError("Either the tok or the instruction is needed.") |
| 58 | self.instruction = instruction |
| 59 | self.priority = priority |
| 60 | self.end_of_line = end_of_line |
| 61 | self._after_tokens = set() |
| 62 | self._after_handler_tokens = set() |
| 63 | if after: |
| 64 | self.mark_after(after) |
| 65 | |
| 66 | def mark_after(self, v): |
| 67 | if isinstance(v, _Token): |
| 68 | self._after_tokens.add(v) |
| 69 | elif isinstance(v, _BaseHandler): |
| 70 | self._after_handler_tokens.add(v) |
| 71 | |
| 72 | else: |
| 73 | raise AssertionError("Unhandled: %s" % (v,)) |
| 74 | |
| 75 | def get_after_tokens(self): |
| 76 | ret = self._after_tokens.copy() |
| 77 | for handler in self._after_handler_tokens: |
| 78 | ret.update(handler.tokens) |
| 79 | return ret |
| 80 | |
| 81 | def __repr__(self): |
| 82 | return "Token(%s, after: %s)" % (self.tok, self.get_after_tokens()) |
| 83 | |
| 84 | __str__ = __repr__ |
| 85 | |
| 86 | |
| 87 | class _Writer(object): |