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工具介紹：
運算符優先級。
| 運算符 | 優先級 |
|---|---|
| postfix | expr++ expr-- |
| unary | ++expr --expr +expr -expr ~ ! |
| multiplicative | * / % |
| additive | + - |
| shift | << >> >>> |
| relational | < > <= >= instanceof |
| equality | == != |
| bitwise AND | & |
| bitwise exclusive OR | ^ |
| bitwise inclusive OR | | |
| logical AND | && |
| logical OR | || |
| ternary | ? : |
| assignment | = += -= *= /= %= &= ^= |= <<= >>= >>>= |
| Precedence | Operator | Description | Associativity |
|---|---|---|---|
| 1 | ::
|
Scope resolution | Left-to-right |
| 2 | ++ --
|
Suffix/postfix increment and decrement | |
()
|
Function call | ||
[]
|
Array subscripting | ||
.
|
Element selection by reference | ||
?>
|
Element selection through pointer | ||
| 3 | ++ --
|
Prefix increment and decrement | Right-to-left |
+ ?
|
Unary plus and minus | ||
! ~
|
Logical NOT and bitwise NOT | ||
(type)
|
Type cast | ||
*
|
Indirection (dereference) | ||
&
|
Address-of | ||
sizeof
|
Size-of | ||
new, new[]
|
Dynamic memory allocation | ||
delete, delete[]
|
Dynamic memory deallocation | ||
| 4 | .* ->*
|
Pointer to member | Left-to-right |
| 5 | * / %
|
Multiplication, division, and remainder | |
| 6 | + ?
|
Addition and subtraction | |
| 7 | << >>
|
Bitwise left shift and right shift | |
| 8 | < <=
|
For relational operators < and ≤ respectively | |
> >=
|
For relational operators > and ≥ respectively | ||
| 9 | == !=
|
For relational = and ≠ respectively | |
| 10 | &
|
Bitwise AND | |
| 11 | ^
|
Bitwise XOR (exclusive or) | |
| 12 | |
|
Bitwise OR (inclusive or) | |
| 13 | &&
|
Logical AND | |
| 14 | ||
|
Logical OR | |
| 15 | ?:
|
Ternary conditional | Right-to-Left |
| 16 | =
|
Direct assignment (provided by default for C++ classes) | |
+= ?=
|
Assignment by sum and difference | ||
*= /= %=
|
Assignment by product, quotient, and remainder | ||
<<= >>=
|
Assignment by bitwise left shift and right shift | ||
&= ^= |=
|
Assignment by bitwise AND, XOR, and OR | ||
| 17 | throw
|
Throw operator (for exceptions) | |
| 18 | ,
|
Comma | Left-to-right |
| Precedence | Operator | Description | Associativity |
|---|---|---|---|
| 1 | ++ --
|
Suffix/postfix increment and decrement | Left-to-right |
()
|
Function call | ||
[]
|
Array subscripting | ||
.
|
Structure and union member access | ||
?>
|
Structure and union member access through pointer | ||
(type){list}
|
Compound literal(C99) | ||
| 2 | ++ --
|
Prefix increment and decrement | Right-to-left |
+ ?
|
Unary plus and minus | ||
! ~
|
Logical NOT and bitwise NOT | ||
(type)
|
Type cast | ||
*
|
Indirection (dereference) | ||
&
|
Address-of | ||
sizeof
|
Size-of | ||
_Alignof
|
Alignment requirement(C11) | ||
| 3 | * / %
|
Multiplication, division, and remainder | Left-to-right |
| 4 | + ?
|
Addition and subtraction | |
| 5 | << >>
|
Bitwise left shift and right shift | |
| 6 | < <=
|
For relational operators < and ≤ respectively | |
> >=
|
For relational operators > and ≥ respectively | ||
| 7 | == !=
|
For relational = and ≠ respectively | |
| 8 | &
|
Bitwise AND | |
| 9 | ^
|
Bitwise XOR (exclusive or) | |
| 10 | |
|
Bitwise OR (inclusive or) | |
| 11 | &&
|
Logical AND | |
| 12 | ||
|
Logical OR | |
| 13 | ?:
|
Ternary conditional | Right-to-Left |
| 14 | =
|
Simple assignment | |
+= ?=
|
Assignment by sum and difference | ||
*= /= %=
|
Assignment by product, quotient, and remainder | ||
<<= >>=
|
Assignment by bitwise left shift and right shift | ||
&= ^= |=
|
Assignment by bitwise AND, XOR, and OR | ||
| 15 | ,
|
Comma | Left-to-right |
| 結合方向 | 運算符 | 附加信息 |
|---|---|---|
| 非結合 | clone new |
clone 和 new |
| 左 | [ |
array() |
| 非結合 | ++ -- |
遞增／遞減運算符 |
| 非結合 | ~ - (int) (float) (string) (array) (object) (bool) @ |
類型 |
| 非結合 | instanceof |
類型 |
| 右結合 | ! |
邏輯操作符 |
| 左 | * / % |
算術運算符 |
| 左 | + - . |
算術運算符 和 字符串運算符 |
| 左 | << >> |
位運算符 |
| 非結合 | < <= > >= <> |
比較運算符 |
| 非結合 | == != === !== |
比較運算符 |
| 左 | & |
位運算符 和 引用 |
| 左 | ^ |
位運算符 |
| 左 | | |
位運算符 |
| 左 | && |
邏輯運算符 |
| 左 | || |
邏輯運算符 |
| 左 | ? : |
三元運算符 |
| 右 |
= += -= *= /= .= %= &= |= ^= <<= >>=
|
賦值運算符 |
| 左 | and |
邏輯運算符 |
| 左 | xor |
邏輯運算符 |
| 左 | or |
邏輯運算符 |
| 左 | , |
多處用到 |
| 運算符 | 描述 |
|---|---|
lambda |
Lambda表達式 |
or |
布爾“或” |
and |
布爾“與” |
not x |
布爾“非” |
in，not in |
成員測試 |
is，is not |
同一性測試 |
<，<=，>，>=，!=，== |
比較 |
| |
按位或 |
^ |
按位異或 |
& |
按位與 |
<<，>> |
移位 |
+，- |
加法與減法 |
*，/，% |
乘法、除法與取余 |
+x，-x |
正負號 |
~x |
按位翻轉 |
** |
指數 |
x.attribute |
屬性參考 |
x[index] |
下標 |
x[index:index] |
尋址段 |
f(arguments...) |
函數調用 |
(experession,...) |
綁定或元組顯示 |
[expression,...] |
列表顯示 |
{key:datum,...} |
字典顯示 |
'expression,...' |
字符串轉換 |
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