[Gamer`]

Hello,
I have a few questions about some symbols,the questions are :
- What the symbols _: does ?
- what the difference between > and >> or >>>
- What the symbols |= does ?
- what the symbol ~ does ?
- I saw that someone is using barackets without a function before it,for example: (parts from rBits)

pawn Код:

return ((_: abArray[iIdx] >>> bVar) & bLim);
    if(!(-1 < iIdx < iSize)) {
    (_: abArray[iIdx] &= ~(bLim << bVar));
    (_: abArray[iIdx] |= ((bLim & iValue) << bVar));
    new
        bVar = ((iIdx & ((1 << _: (Bit32 - iShift)) - 1)) << _: iShift),
        bLim = ((1 << (1 << _: iShift)) - 1)
        ;

How does it compile without errors or warnings ?