version(none)
static if(isIntegral!LowType && isIntegral!HighType)
static if(signed && low < 0)
static if(packed)
static if(!(low >= -0x80 && high <= 0x7f))
static if(!(low >= -0x8000 && high <= 0x7fff))
static if(!(low >= -0x80000000 && high <= 0x7fffffff))
static if(!(low >= -0x8000000000000000 && high <= 0x7fffffffffffffff))