t.byName[f.Name] = id
	t.byNameValue[pairNameValue{f.Name, f.Value}] = id
	t.ents = append(t.ents, f)
}

// evictOldest evicts the n oldest entries in the table.
func (t *headerFieldTable) evictOldest(n int) {
	if n > t.len() {
		panic(fmt.Sprintf("evictOldest(%v) on table with %v entries", n, t.len()))
	}
	for k := 0; k < n; k++ {
		f := t.ents[k]
		id := t.evictCount + uint64(k) + 1

}

// If we're too big, evict old stuff.
func (dt *dynamicTable) evict() {
	var n int
	for dt.size > dt.maxSize && n < dt.table.len() {
		dt.size -= dt.table.ents[n].Size()
		n++
	}
	dt.table.evictOldest(n)
}

func (d *Decoder) maxTableIndex() int {
	// This should never overflow. RFC 7540 Section 6.5.2 limits the size of
	// the dynamic table to 2^32 bytes, where each entry will occupy more than