pub struct GlobalRef(_);
Expand description
Reference to a global variable (See GlobalInstance
for details).
This reference has a reference-counting semantics.
Methods from Deref<Target = GlobalInstance>
sourcepub fn set(&self, val: RuntimeValue) -> Result<(), Error>
pub fn set(&self, val: RuntimeValue) -> Result<(), Error>
Change the value of this global variable.
Errors
Returns Err
if this global isn’t mutable or if
type of val
doesn’t match global’s type.
sourcepub fn get(&self) -> RuntimeValue
pub fn get(&self) -> RuntimeValue
Get the value of this global variable.
sourcepub fn is_mutable(&self) -> bool
pub fn is_mutable(&self) -> bool
Returns if this global variable is mutable.
Note: Imported and/or exported globals are always immutable.
sourcepub fn value_type(&self) -> ValueType
pub fn value_type(&self) -> ValueType
Returns value type of this global variable.
Trait Implementations
sourceimpl Deref for GlobalRef
impl Deref for GlobalRef
type Target = GlobalInstance
type Target = GlobalInstance
The resulting type after dereferencing.
sourcefn deref(&self) -> &GlobalInstance
fn deref(&self) -> &GlobalInstance
Dereferences the value.
Auto Trait Implementations
impl !RefUnwindSafe for GlobalRef
impl !Send for GlobalRef
impl !Sync for GlobalRef
impl Unpin for GlobalRef
impl !UnwindSafe for GlobalRef
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more