Enum BinOp 

pub enum BinOp {
    Add,
    Sub,
    Mul,
    Div,
    Rem,
    Shl,
    Shr,
    UShr,
    Lt,
    Le,
    Gt,
    Ge,
    Eq,
    Ne,
    BitAnd,
    BitXor,
    BitOr,
    And,
    Or,
    Pow,
    StrictEq,
    StrictNe,
    Nullish,
    In,
    Instanceof,
}

二元运算符（规范词汇表，语言负责映射）。

Variants

Add

Sub

Mul

Div

Rem

Shl

Shr

UShr

Lt

Le

Gt

Ge

Eq

Ne

BitAnd

BitXor

BitOr

And

Or

Pow

**（幂）。右结合且非结合律——重结合类规则须跳过。

StrictEq

===（严格相等）。与 BinOp::Eq（宽松 ==）语义不同： 折叠规则必须按语言语义分别处理。

StrictNe

!==（严格不等）。

Nullish

??（空值合并——非短路布尔：返回操作数值而非布尔）。

In

in（属性存在性，二元关系）。

Instanceof

instanceof（JS 的二元运算形态，RHS 是任意表达式）。

Implementations

impl BinOp

pub fn is_comparison(self) -> bool

pub fn is_short_circuit(self) -> bool

pub fn may_div_zero(self) -> bool

可能因除零抛异常的运算。

pub fn is_arith(self) -> bool

整数算术/位运算类（用于精确整数恒等式守卫）。

Trait Implementations

impl Clone for BinOp

fn clone(&self) -> BinOp

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BinOp

impl Debug for BinOp

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for BinOp

impl Hash for BinOp

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BinOp

fn eq(&self, other: &BinOp) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for BinOp