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109 lines
2.5 KiB
Cython
109 lines
2.5 KiB
Cython
from collections.abc import MutableSequence
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cdef class FrozenList:
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cdef readonly bint frozen
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cdef list _items
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def __init__(self, items=None):
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self.frozen = False
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if items is not None:
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items = list(items)
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else:
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items = []
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self._items = items
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cdef object _check_frozen(self):
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if self.frozen:
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raise RuntimeError("Cannot modify frozen list.")
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cdef inline object _fast_len(self):
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return len(self._items)
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def freeze(self):
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self.frozen = True
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def __getitem__(self, index):
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return self._items[index]
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def __setitem__(self, index, value):
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self._check_frozen()
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self._items[index] = value
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def __delitem__(self, index):
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self._check_frozen()
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del self._items[index]
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def __len__(self):
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return self._fast_len()
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def __iter__(self):
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return self._items.__iter__()
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def __reversed__(self):
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return self._items.__reversed__()
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def __richcmp__(self, other, op):
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if op == 0: # <
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return list(self) < other
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if op == 1: # <=
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return list(self) <= other
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if op == 2: # ==
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return list(self) == other
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if op == 3: # !=
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return list(self) != other
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if op == 4: # >
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return list(self) > other
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if op == 5: # =>
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return list(self) >= other
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def insert(self, pos, item):
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self._check_frozen()
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self._items.insert(pos, item)
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def __contains__(self, item):
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return item in self._items
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def __iadd__(self, items):
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self._check_frozen()
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self._items += list(items)
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return self
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def index(self, item):
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return self._items.index(item)
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def remove(self, item):
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self._check_frozen()
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self._items.remove(item)
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def clear(self):
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self._check_frozen()
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self._items.clear()
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def extend(self, items):
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self._check_frozen()
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self._items += list(items)
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def reverse(self):
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self._check_frozen()
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self._items.reverse()
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def pop(self, index=-1):
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self._check_frozen()
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return self._items.pop(index)
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def append(self, item):
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self._check_frozen()
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return self._items.append(item)
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def count(self, item):
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return self._items.count(item)
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def __repr__(self):
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return '<FrozenList(frozen={}, {!r})>'.format(self.frozen,
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self._items)
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MutableSequence.register(FrozenList)
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