Add support for decimal literals to u128 and u256. This means that all unsigned integer types now support bit, byte and decimal literals. Introduce the U256 struct to handle 256-bit unsigned integers.
For now, 256-bit arithmetic is not required, because there is no pure Simfony runtime. Simfony programs are compiled to Simplicity and run inside the Simplicity runtime.
Add support for decimal literals to
u128
andu256
. This means that all unsigned integer types now support bit, byte and decimal literals. Introduce theU256
struct to handle 256-bit unsigned integers.