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 Precedence

    Operators--indeed, all expressions--have an inherent precedence; that
    is, in the absence of explicit grouping (through parentheses), the
    order of evaluation of an expression depends upon the precedence of
    the elements involved.  Operators of higher precedence are evaluated
    before operators of lower precedence.

    In the table below, elements on the same line have equal precedence.
    The first two lines contain unary operators; that is, they take only
    one argument.  The remaining lines contain binary operators--they
    take two arguments.  Note that several symbols have both unary and
    binary definitions.

   ---------------------------- Precedence --------------------------------
   Operator                                                    Associativity
   ------------------------------------------------------------------------
    ( )  [ ]   ->   ::   .                                     Left to right
    !  ~  +  -  ++  --  &  * (typecast)  sizeof  new  delete   Right to left
    .*   ->*                                                   Left to right
    *   /    %                                                 Left to right
    +   -                                                      Left to right
    <<  >>                                                     Left to right
    <   <=   >   >=                                            Left to right
    ==  !=                                                     Left to right
    &                                                          Left to right
    ^                                                          Left to right
    |                                                          Left to right
    &&                                                         Left to right
    ||                                                         Left to right
    ?: (conditional expression)                                Right to left
    =  *=  /=  %=  +=  -=  &= ^=  |=  <<=  >>=                 Right to left
    ,                                                          Left to right
   ----------------------------------------------------------------------

    Note that of these operators, . and ?: cannot be overloaded, nor
    can the operators specific to C++, ::, .*, and ->* be overloaded.