func (rb *reorderBuffer) insertFlush(src input, i int, info Properties) insertErr {
	if rune := src.hangul(i); rune != 0 {
		rb.decomposeHangul(rune)
		return iSuccess
	}
	if info.hasDecomposition() {
		return rb.insertDecomposed(info.Decomposition())
	}
	rb.insertSingle(src, i, info)
	return iSuccess
}

// insertUnsafe inserts the given rune in the buffer ordered by CCC.

func (rb *reorderBuffer) insertFlush(src input, i int, info Properties) insertErr {
	if rune := src.hangul(i); rune != 0 {
		rb.decomposeHangul(rune)
		return iSuccess
	}
	if info.hasDecomposition() {
		return rb.insertDecomposed(info.Decomposition())
	}
	rb.insertSingle(src, i, info)
	return iSuccess
}

// insertUnsafe inserts the given rune in the buffer ordered by CCC.

func (p Properties) combinesForward() bool  { return p.flags&0x20 != 0 }
func (p Properties) combinesBackward() bool { return p.flags&0x8 != 0 } // == isMaybe
func (p Properties) hasDecomposition() bool { return p.flags&0x4 != 0 } // == isNoD

func (p Properties) isInert() bool {
	return p.flags&qcInfoMask == 0 && p.ccc == 0
}

func (p Properties) multiSegment() bool {

func (p Properties) combinesForward() bool  { return p.flags&0x20 != 0 }
func (p Properties) combinesBackward() bool { return p.flags&0x8 != 0 } // == isMaybe
func (p Properties) hasDecomposition() bool { return p.flags&0x4 != 0 } // == isNoD

func (p Properties) isInert() bool {
	return p.flags&qcInfoMask == 0 && p.ccc == 0
}

func (p Properties) multiSegment() bool {