Enum boa_engine::syntax::ast::constant::Const

pub enum Const {
    String(Sym),
    Num(f64),
    Int(i32),
    BigInt(Box<BigInt>),
    Bool(bool),
    Null,
    Undefined,
}

Literals represent values in JavaScript.

These are fixed values not variables that you literally provide in your script.

More information:

• ECMAScript reference
• MDN documentation

Variants

String(Sym)

A string literal is zero or more characters enclosed in double (") or single (') quotation marks.

A string must be delimited by quotation marks of the same type (that is, either both single quotation marks, or both double quotation marks). You can call any of the String object’s methods on a string literal value. JavaScript automatically converts the string literal to a temporary String object, calls the method, then discards the temporary String object.

More information:

• ECMAScript reference
• MDN documentation

Num(f64)

A floating-point number literal.

The exponent part is an “e” or “E” followed by an integer, which can be signed (preceded by “+” or “-”). A floating-point literal must have at least one digit, and either a decimal point or “e” (or “E”).

More information:

• ECMAScript reference
• MDN documentation

Int(i32)

Integer types can be expressed in decimal (base 10), hexadecimal (base 16), octal (base 8) and binary (base 2).

More information:

• ECMAScript reference
• MDN documentation

BigInt(Box<BigInt>)

BigInt provides a way to represent whole numbers larger than the largest number JavaScript can reliably represent with the Number primitive.

More information:

• ECMAScript reference
• MDN documentation

Bool(bool)

The Boolean type has two literal values: true and false.

The Boolean object is a wrapper around the primitive Boolean data type.

More information:

• ECMAScript reference
• MDN documentation

Null

In JavaScript, null is marked as one of the primitive values, cause it’s behaviour is seemingly primitive.

In computer science, a null value represents a reference that points, generally intentionally, to a nonexistent or invalid object or address. The meaning of a null reference varies among language implementations.

More information:

• ECMAScript reference
• MDN documentation

Undefined

The undefined is a primitive value automatically assigned to variables that have just been declared, or to formal arguments for which there are no actual arguments.

More information:

• ECMAScript reference
• MDN documentation

Trait Implementations

impl Clone for Const

fn clone(&self) -> Const

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Const

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

Formats the value using the given formatter.

impl Finalize for Const

fn finalize(&self)

impl From<BigInt> for Const

fn from(i: BigInt) -> Self

Converts to this type from the input type.

impl From<Box<BigInt, Global>> for Const

fn from(i: Box<BigInt>) -> Self

Converts to this type from the input type.

impl From<Const> for Node

fn from(c: Const) -> Self

Converts to this type from the input type.

impl From<Sym> for Const

fn from(string: Sym) -> Self

Converts to this type from the input type.

impl From<bool> for Const

fn from(b: bool) -> Self

Converts to this type from the input type.

impl From<f64> for Const

fn from(num: f64) -> Self

Converts to this type from the input type.

impl From<i32> for Const

fn from(i: i32) -> Self

Converts to this type from the input type.

impl PartialEq<Const> for Const

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

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

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

This method tests for !=.

impl ToInternedString for Const

fn to_interned_string(&self, interner: &Interner) -> String

Converts a given element to a string using an interner.

impl Trace for Const

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 StructuralPartialEq for Const