Enum Visibility

pub enum Visibility {
    Default,
    Hidden,
    Protected,
}

Specifies the symbol visibility with regards to dynamic linking.

Visibility doesn’t have any effect when linkage is internal.

DSO means dynamic shared object, that is a dynamically linked executable or dylib.

Variants

Default

Export the symbol from the DSO and apply overrides of the symbol by outside DSOs to within the DSO if the object file format supports this.

Hidden

Hide the symbol outside of the defining DSO even when external linkage is used to export it from the object file.

Protected

Export the symbol from the DSO, but don’t apply overrides of the symbol by outside DSOs to within the DSO. Equivalent to default visibility with object file formats that don’t support overriding exported symbols by another DSO.