Enum boa::syntax::ast::op::CompOp

pub enum CompOp {
    Equal,
    NotEqual,
    StrictEqual,
    StrictNotEqual,
    GreaterThan,
    GreaterThanOrEqual,
    LessThan,
    LessThanOrEqual,
    In,
    InstanceOf,
}

A comparison operator compares its operands and returns a logical value based on whether the comparison is true.

The operands can be numerical, string, logical, or object values. Strings are compared based on standard lexicographical ordering, using Unicode values. In most cases, if the two operands are not of the same type, JavaScript attempts to convert them to an appropriate type for the comparison. This behavior generally results in comparing the operands numerically. The sole exceptions to type conversion within comparisons involve the === and !== operators, which perform strict equality and inequality comparisons. These operators do not attempt to convert the operands to compatible types before checking equality.

More information:

• ECMAScript reference
• MDN documentation

Variants

Equal

The equality operator converts the operands if they are not of the same type, then applies strict comparison.

Syntax: y == y

If both operands are objects, then JavaScript compares internal references which are equal when operands refer to the same object in memory.

More information:

• ECMAScript reference
• MDN documentation

NotEqual

The inequality operator returns true if the operands are not equal.

Syntax: x != y

If the two operands are not of the same type, JavaScript attempts to convert the operands to an appropriate type for the comparison. If both operands are objects, then JavaScript compares internal references which are not equal when operands refer to different objects in memory.

More information:

• ECMAScript reference
• MDN documentation

StrictEqual

The identity operator returns true if the operands are strictly equal with no type conversion.

Syntax: x === y

Returns true if the operands are equal and of the same type.

More information:

• ECMAScript reference
• MDN documentation

StrictNotEqual

The non-identity operator returns true if the operands are not equal and/or not of the same type.

Syntax: x !== y

Returns true if the operands are of the same type but not equal, or are of different type.

More information:

• ECMAScript reference
• MDN documentation

GreaterThan

The greater than operator returns true if the left operand is greater than the right operand.

Syntax: x > y

Returns true if the left operand is greater than the right operand.

More information:

• ECMAScript reference
• MDN documentation

GreaterThanOrEqual

The greater than or equal operator returns true if the left operand is greater than or equal to the right operand.

Syntax: x >= y

Returns true if the left operand is greater than the right operand.

More information:

• ECMAScript reference
• MDN documentation

LessThan

The less than operator returns true if the left operand is less than the right operand.

Syntax: x < y

Returns true if the left operand is less than the right operand.

More information:

• ECMAScript reference
• MDN documentation

LessThanOrEqual

The less than or equal operator returns true if the left operand is less than or equal to the right operand.

Syntax: x <= y

Returns true if the left operand is less than or equal to the right operand.

More information:

• ECMAScript reference
• MDN documentation

In

The in operator returns true if the specified property is in the specified object or its prototype chain.

Syntax: prop in object

Returns true the specified property is in the specified object or its prototype chain.

More information:

• ECMAScript reference
• MDN documentation

InstanceOf

The instanceof operator returns true if the specified object is an instance of the right hand side object.

Syntax: obj instanceof Object

Returns true the prototype property of the right hand side constructor appears anywhere in the prototype chain of the object.

More information:

• ECMAScript reference
• MDN documentation

Trait Implementations

impl Clone for CompOp

fn clone(&self) -> CompOp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CompOp

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

Formats the value using the given formatter.

impl Display for CompOp

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

Formats the value using the given formatter.

impl Finalize for CompOp

fn finalize(&self)

impl From<CompOp> for BinOp

fn from(op: CompOp) -> Self

Converts to this type from the input type.

impl PartialEq<CompOp> for CompOp

fn eq(&self, other: &CompOp) -> 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 CompOp

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 CompOp

impl StructuralPartialEq for CompOp