Method MapIds

source/diff/diff.cpp:77–84

  IdMap(size_t id_bound) { id_map_.resize(id_bound, 0); }

  void MapIds(uint32_t from, uint32_t to) {
    assert(from != 0);
    assert(to != 0);
    assert(from < id_map_.size());
    assert(id_map_[from] == 0);

    id_map_[from] = to;
  }

  uint32_t MappedId(uint32_t from) const {
    assert(from != 0);