pub struct GlobalInstance { /* private fields */ }
Expand description

Runtime representation of a global variable (or global for short).

Global contains a value of a specified type and flag which specifies whether this global are mutable or immutable. Neither type of the value nor immutability can’t be changed after creation.

Attempt to change value of immutable global or to change type of the value (e.g. assign I32 value to a global that was created with I64 type) will lead to an error.

Implementations

Allocate a global variable instance.

Since it is possible to export only immutable globals, users likely want to set mutable to false.

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.

Get the value of this global variable.

Returns if this global variable is mutable.

Note: Imported and/or exported globals are always immutable.

Returns value type of this global variable.

Trait Implementations

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

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

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

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

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

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

Performs the conversion.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.