C4146 in VS 2013

[zno5]

uint32_t pcg32_random_r(pcg32_random_t* rng);

I got an error message C4146 when I compiled this function with vs 2013.
the problem is the minus op applied to unsigned type variable rot(in the return code).

Could you change that code like ~rot + 1 instead of -rot.

thanks.

and I think this following issue is minor...
I think xorshifted variable would need a casting op. like this
uint32_t xorshifted = (uint32_t) (((oldstate >> 18u) ^ oldstate) >> 27u);

[Srekel]

Same here with VS2017. Could "fix" it by adding
#pragma warning( disable : 4146 )
But zno5's solution might be better.

[lemire]

The question is whether the warning is legitimate as per the language specification.