[−][src]Struct boa::syntax::ast::node::declaration::VarDeclList
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:
Trait Implementations
impl AsRef<[VarDecl]> for VarDeclList
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impl Clone for VarDeclList
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fn clone(&self) -> VarDeclList
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fn clone_from(&mut self, source: &Self)
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impl Debug for VarDeclList
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impl Display for VarDeclList
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impl Drop for VarDeclList
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impl Executable for VarDeclList
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impl Finalize for VarDeclList
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impl<T> From<T> for VarDeclList where
T: Into<Box<[VarDecl]>>,
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T: Into<Box<[VarDecl]>>,
impl From<VarDecl> for VarDeclList
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impl From<VarDeclList> for Node
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fn from(list: VarDeclList) -> Self
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impl PartialEq<VarDeclList> for VarDeclList
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fn eq(&self, other: &VarDeclList) -> bool
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fn ne(&self, other: &VarDeclList) -> bool
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impl StructuralPartialEq for VarDeclList
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impl Trace for VarDeclList
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Auto Trait Implementations
impl RefUnwindSafe for VarDeclList
impl Send for VarDeclList
impl Sync for VarDeclList
impl Unpin for VarDeclList
impl UnwindSafe for VarDeclList
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> NativeObject for T where
T: Any + Debug + Trace,
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T: Any + Debug + Trace,
fn as_any(&Self) -> &(dyn Any + 'static)
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fn as_mut_any(&mut Self) -> &mut (dyn Any + 'static)
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,