Trait MetaTag 

pub trait MetaTag:
    Any
    + Debug
    + Display
    + MetaTagClone
    + Send
    + Sync { }

Core trait that must be implemented by all structs representing metadata.

This trait requires implementers to also implement MetaTagClone, which is required to enable cloning of Box<dyn MetaTag> objects. The Display impl of the metadata type is used by rustronomy when printing the metadata contents of a container.

Methods

Although the MetaTag trait itself doesn’t contain any methods, there are a couple methods implemented for dyn MetaTag. Most of these are copies from methods implemented in std for dyn Any.

Implementations

impl dyn MetaTag

pub fn is<T: Any>(&self) -> bool

Returns true if self is of type T, false otherwise

pub fn downcast<T: Any + Clone>(&self) -> Option<T>

Casts &self to T by cloning &T. This requires T to impl Clone. If self does not have type T, this method returns None.

pub fn downcast_ref<T: Any>(&self) -> Option<&T>

Casts &self to &T. If self does not have type T, this method returns None.

pub fn downcast_mut<T: Any>(&mut self) -> Option<&mut T>

Casts &mut self to &mut T. If self does not have type T, this method returns None.

Trait Implementations

impl Clone for Box<dyn MetaTag>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

Implementors

impl MetaTag for Author

impl MetaTag for CreationDate

impl MetaTag for ExposureTime

impl MetaTag for Instrument

impl MetaTag for LastModified

impl MetaTag for Object

impl MetaTag for Organisation

impl MetaTag for ReferencePublication

impl MetaTag for Telescope