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Function `core.checkedint.subu`

Subtract two unsigned integers, checking for overflow (aka borrow).


						
				uint subu
				(
				

				  uint x,
				

				  uint y,
				

				  ref bool overflow
				

				) pure nothrow @nogc @safe;
				

				

				ulong subu
				(
				

				  ulong x,
				

				  ulong y,
				

				  ref bool overflow
				

				) pure nothrow @nogc @safe;
				

				

				ucent subu
				(
				

				  ucent x,
				

				  ucent y,
				

				  ref bool overflow
				

				);

The overflow is sticky, meaning a sequence of operations can be done and overflow need only be checked at the end.

Parameters

Name	Description
x	left operand
y	right operand
overflow	set if an overflow occurs, is not affected otherwise

Returns

the difference

Authors

Walter Bright

License

Boost License 1.0