c++ tips , allocations , operator=() , const , exceptions , book list , more
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windows API a c only book .
to clarify the teaser question at the end of the video.
if( ! cin ) and if( cin ) are both valid statements.
thus , over loading operator!() isn't the answer.
keep on thinking .
const use , if I did not already say:
overload operator+() and it is obvious that both the LHS and RHS
arguments should remain un-changed , both LHS and RHS arguments should be const , so the Caller's passed in arguents will be un-changed , before\during\after the call to operator+() .
operator+=() by it's very name , suggests that the LHS Will be modified( assigned= ) a\the result . Thus , RHS should be const
and the LHS should remain as variable . logically , this all seems reasonable . The caller should expect the RHS argument be un-changed , and that the LHS argument will be\get updated.