Question

assignment_operator ::=         // 引用自附录A.6.2
    = | += | -= | *= | /= | %= | &= | |= | ^= | <<= | >>= | <<<= | >>>=

conditional_expression ::=      // 引用自附录A.8.3
    cond_predicate ? {attribute_instance} expression : expression

unary_operator ::=              // 引用自附录A.8.6
    + | - | ! | ~ | & | ~& | | | ~| | ^ | ~^ | ^~

binary_operator ::=
    + | - | * | / | % | == | != | === | !== | =?= | !?= | && | || | **
    | < | <= | > | >= | & | | | ^ | ^~ | ~^ | >> | << | >>> | <<<

inc_or_dec_operator ::= ++ | --

unary_module_path_operator ::=
    ! | ~ | & | ~& | | | ~| | ^ | ~^ | ^~

binary_module_path_operator ::=
    == | != | && | || | & | | | ^ | ^~ | ~^

语法7-1 — 操作符语法（摘录自附录A）