Struct libdata::column::Headers

pub struct Headers(_);

A multi-set of tags.

This is similar to the Tags type, but allows having multiple values of each type (or even an empty slot in each type). This is what you'd get when you combine data from multiple flows in additive manner.

However, values are deduplicated ‒ eg. there may be multiple remote IP addresses, but each one only in one instance.

Methods

impl Headers

fn new() -> Self

Creates a new empty Headers.

fn insert_opt(&mut self, ident: Ident, value: Option<Value>) -> bool

Inserts an optional value into the set.

Returns false if it is already present. The contained value is not updated.

Panics

If Some(value) is inserted and the ident doesn't match.

fn insert<V: Into<Value>>(&mut self, value: V) -> bool

Inserts another value.

If the value is already present, it is not updated and false is returned instead.

fn insert_empty(&mut self, ident: Ident) -> bool

Inserts a hole of the given type.

Each type of column can contain a single None value. This inserts the None into the given type. Returns false if it was already present.

fn iter(&self) -> Iter<Ident, Header>

Iterates through the set by types.

Trait Implementations

impl Clone for Headers

fn clone(&self) -> Headers

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Headers

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for Headers

fn default() -> Headers

Returns the "default value" for a type.

impl Eq for Headers

impl PartialEq for Headers

fn eq(&self, __arg_0: &Headers) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Headers) -> bool

This method tests for !=.

impl<'de> Deserialize<'de> for Headers

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl<'a> IntoIterator for &'a Headers

type Item = (&'a Ident, &'a Header)

The type of the elements being iterated over.

type IntoIter = Iter<'a, Ident, Header>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Iter<'a, Ident, Header>

Creates an iterator from a value.