ensure_front_room()

template<typename T>

void fl::deque< T >::ensure_front_room ( )

inlineprivate

Definition at line 148 of file deque.h.

                                          {
        if (mFrontOffset > 0) {
            // Stays within current front chunk; that chunk is guaranteed
            // allocated when mSize > 0, and allocated below for empty deque.
            if (mMapCapacity == 0) {
                grow_map(1, 0);
                if (mMapCapacity == 0) return;
            }
            if (mMap[mFrontMapIdx] == nullptr) {
                mMap[mFrontMapIdx] = allocate_chunk();
            }
            return;
        }
        // mFrontOffset == 0: need the previous chunk.
        if (mFrontMapIdx == 0) {
            grow_map(1, 0);
            if (mFrontMapIdx == 0) return;  // grow failed
        }
        if (mMap[mFrontMapIdx - 1] == nullptr) {
            mMap[mFrontMapIdx - 1] = allocate_chunk();
        }
    }

Referenced by fl::deque< int >::emplace_front(), fl::deque< int >::push_front(), and fl::deque< int >::push_front().

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