void assign_bits(Backend& val, Unsigned bits, unsigned bit_location, unsigned chunk_bits, const mpl::false_& tag)
{
unsigned limb = bit_location / (sizeof(limb_type) * CHAR_BIT);
unsigned shift = bit_location % (sizeof(limb_type) * CHAR_BIT);
limb_type mask = chunk_bits >= sizeof(limb_type) * CHAR_BIT ? ~static_cast<limb_type>(0u) : (static_cast<limb_type>(1u) << chunk_bits) - 1;
limb_type value = static_cast<limb_type>(bits & mask) << shift;
if(value)
{
if(val.size() == limb)
{
val.resize(limb + 1, limb + 1);
if(val.size() > limb)
val.limbs()[limb] = value;
}
else if(val.size() > limb)
val.limbs()[limb] |= value;
}
if(chunk_bits > sizeof(limb_type) * CHAR_BIT - shift)
{
shift = sizeof(limb_type) * CHAR_BIT - shift;
chunk_bits -= shift;
bit_location += shift;
bits >>= shift;
if(bits)
assign_bits(val, bits, bit_location, chunk_bits, tag);
}
