Enum TopicMatch 

pub enum TopicMatch<'a> {
    Any,
    Absent,
    Exact(&'a str),
}

Match any topic, no topic, or one exact topic (including an empty label).

Variants

Any

Do not filter on topic presence or value.

Absent

Match only rows with no topic.

Exact(&'a str)

Match a present topic exactly.

Trait Implementations

impl<'a> Clone for TopicMatch<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for TopicMatch<'a>

impl<'a> Debug for TopicMatch<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Default for TopicMatch<'a>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Eq for TopicMatch<'a>

impl<'a> PartialEq for TopicMatch<'a>

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<'a> StructuralPartialEq for TopicMatch<'a>