ssion> ))

DESCRIPTION
    The expression is evaluated using numeric operators,
    and returns a boolean value indicating whether the expression
    was non-zero. The set of operators are as follows:
        <varname>               - evaluates to the variable value
        <varname>++             - postincrement
        <varname>--             - postdecrement
        !<expr>                 - logical NOT
        ~<expr>                 - bitwise negation
        <expr> * <expr>         - multiplication
        <expr> / <expr>         - division
        <expr> + <expr>         - addition
        <expr> - <expr>         - subtraction
        <expr> < <expr>         - comparison. evaluates to 0 or 1
        <expr> <= <expr>        - comparison. evaluates to 0 or 1
        <expr> == <expr>        - comparison. evaluates to 0 or 1
        <expr> >= <expr>        - comparison. evaluates to 0 or 1
        <expr> > <expr>         - comparison. evaluates to 0 or 1
        <expr> & <expr>         - bitwise AND
        <expr> | <expr>         - bitwise OR
        <expr> ^ <expr>         - bitwise XOR
        <expr> << <expr>        - left shift
        <expr> >> <expr>        - right shift
        <expr> && <expr>        - logical AND
        <expr> || <expr>        - logical OR
        <varname> = <expr>      - assignment
        <varname> += <expr>     - assign var + expr to var
        <varname> -= <expr>     - assign var - expr to var
        <varname> *= <expr>     - assign var * expr to var
        <varname> /= <expr>     - assign var / expr to var
        <varname> <<= <expr>    - left shift value of var by expr bits, assign to var
        <varname> >>= <expr>    - right shift value of var by expr bits, assign to var
        ( <expr> )              - value of expression