func (pr *PkgDecoder) TempDecoder(k RelocKind, idx Index, marker SyncMarker) Decoder {
	r := pr.TempDecoderRaw(k, idx)
	r.Sync(marker)
	return r
}

func (pr *PkgDecoder) RetireDecoder(d *Decoder) {
	pr.scratchRelocEnt = d.Relocs
	d.Relocs = nil
}

// NewDecoderRaw returns a Decoder for the given (section, index) pair.
//
// Most callers should use NewDecoder instead.

	return &reader{
		Decoder: pr.TempDecoder(k, idx, marker),
		p:       pr,
	}
}

func (pr *pkgReader) retireReader(r *reader) {
	pr.RetireDecoder(&r.Decoder)
}

// @@@ Positions

func (r *reader) pos() token.Pos {
	r.Sync(pkgbits.SyncPos)
	if !r.Bool() {
		return token.NoPos
	}

	// TODO(mdempsky): Delta encoding.