Enum boa::syntax::ast::op::AssignOp

pub enum AssignOp {
    Add,
    Sub,
    Mul,
    Div,
    Mod,
    Exp,
    And,
    Or,
    Xor,
    Shl,
    Shr,
    Ushr,
    BoolAnd,
    BoolOr,
    Coalesce,
}

An assignment operator assigns a value to its left operand based on the value of its right operand.

The simple assignment operator is equal (=), which assigns the value of its right operand to its left operand. That is, x = y assigns the value of y to x.

There are also compound assignment operators that are shorthand for the operations

More information:

• ECMAScript reference
• MDN documentation

Variants

Add

The addition assignment operator adds the value of the right operand to a variable and assigns the result to the variable.

Syntax: x += y

The types of the two operands determine the behavior of the addition assignment operator. Addition or concatenation is possible.

More information:

• ECMAScript reference
• MDN documentation

Sub

The subtraction assignment operator subtracts the value of the right operand from a variable and assigns the result to the variable.

Syntax: x -= y

More information:

• ECMAScript reference
• MDN documentation

Mul

The multiplication assignment operator multiplies a variable by the value of the right operand and assigns the result to the variable.

Syntax: x *= y

More information:

• ECMAScript reference
• MDN documentation

Div

The division assignment operator divides a variable by the value of the right operand and assigns the result to the variable.

Syntax: x /= y

More information:

• ECMAScript reference
• MDN documentation

Mod

The remainder assignment operator divides a variable by the value of the right operand and assigns the remainder to the variable.

Syntax: x %= y

More information:

• ECMAScript reference
• MDN documentation

Exp

The exponentiation assignment operator raises the value of a variable to the power of the right operand.

Syntax: x ** y

More information:

• ECMAScript reference
• MDN documentation

And

The bitwise AND assignment operator uses the binary representation of both operands, does a bitwise AND operation on them and assigns the result to the variable.

Syntax: x &= y

More information:

• ECMAScript reference
• MDN documentation

Or

The bitwise OR assignment operator uses the binary representation of both operands, does a bitwise OR operation on them and assigns the result to the variable.

Syntax: x |= y

More information:

• ECMAScript reference
• MDN documentation

Xor

The bitwise XOR assignment operator uses the binary representation of both operands, does a bitwise XOR operation on them and assigns the result to the variable.

Syntax: x ^= y

More information:

• ECMAScript reference
• MDN documentation

Shl

The left shift assignment operator moves the specified amount of bits to the left and assigns the result to the variable.

Syntax: x <<= y

More information:

• ECMAScript reference
• MDN documentation

Shr

The right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable.

Syntax: x >>= y

More information:

• ECMAScript reference
• MDN documentation

Ushr

The unsigned right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable.

Syntax: x >>>= y

More information:

• ECMAScript reference
• MDN documentation

BoolAnd

The logical and assignment operator only assigns if the target variable is truthy.

Syntax: x &&= y

More information:

• ECMAScript reference
• MDN documentation

BoolOr

The logical or assignment operator only assigns if the target variable is falsy.

Syntax: x ||= y

More information:

• ECMAScript reference
• MDN documentation

Coalesce

The logical nullish assignment operator only assigns if the target variable is nullish (null or undefined).

Syntax: x ??= y

More information:

• ECMAScript reference
• MDN documentation

Trait Implementations

impl Clone for AssignOp

fn clone(&self) -> AssignOp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AssignOp

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

Formats the value using the given formatter.

impl Display for AssignOp

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

Formats the value using the given formatter.

impl Finalize for AssignOp

fn finalize(&self)

impl From<AssignOp> for BinOp

fn from(op: AssignOp) -> Self

Converts to this type from the input type.

impl PartialEq<AssignOp> for AssignOp

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Trace for AssignOp

unsafe fn trace(&self)

Marks all contained Gcs.

unsafe fn root(&self)

Increments the root-count of all contained Gcs.

unsafe fn unroot(&self)

Decrements the root-count of all contained Gcs.

fn finalize_glue(&self)

Runs Finalize::finalize() on this object and all contained subobjects

impl Copy for AssignOp

impl StructuralPartialEq for AssignOp