I used it extensively in my bc (https://git.yzena.com/gavin/bc https://git.yzena.com/gavin/bc) in the math to tell the compiler that the out BigNum is not alias

I used it extensively in my bc (https://git.yzena.com/gavin/bc https://git.yzena.com/gavin/bc) in the math to tell the compiler that the out BigNum is not aliased by any of the in operands. (See https://git.yzena.com/gavin/bc/src/branch/master/src/num.c#L880 https://git.yzena.com/gavin/bc/src/branch/master/src/num.c#L... .)