Struct boa::syntax::ast::node::declaration::VarDeclList

pub struct VarDeclList { /* fields omitted */ }

The var statement declares a variable, optionally initializing it to a value.

var declarations, wherever they occur, are processed before any code is executed. This is called hoisting, and is discussed further below.

The scope of a variable declared with var is its current execution context, which is either the enclosing function or, for variables declared outside any function, global. If you re-declare a JavaScript variable, it will not lose its value.

Assigning a value to an undeclared variable implicitly creates it as a global variable (it becomes a property of the global object) when the assignment is executed.

More information:

• ECMAScript reference
• MDN documentation

Trait Implementations

impl AsRef<[VarDecl]> for VarDeclList

fn as_ref(&self) -> &[VarDecl]

Performs the conversion.

impl Clone for VarDeclList

fn clone(&self) -> VarDeclList

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VarDeclList

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

Formats the value using the given formatter.

impl Display for VarDeclList

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

Formats the value using the given formatter.

impl Drop for VarDeclList

fn drop(&mut self)

Executes the destructor for this type.

impl Executable for VarDeclList

fn run(&self, interpreter: &mut Context) -> Result<Value>

Runs this executable in the given context.

impl Finalize for VarDeclList

fn finalize(&self)

impl<T> From<T> for VarDeclList where
    T: Into<Box<[VarDecl]>>, 

fn from(list: T) -> Self

Performs the conversion.

impl From<VarDecl> for VarDeclList

fn from(decl: VarDecl) -> Self

Performs the conversion.

impl From<VarDeclList> for Node

fn from(list: VarDeclList) -> Self

Performs the conversion.

impl PartialEq<VarDeclList> for VarDeclList

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

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

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

This method tests for !=.

impl StructuralPartialEq for VarDeclList

impl Trace for VarDeclList

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