Struct Fields 

pub struct Fields<'a> { /* private fields */ }

A struct representing a collection of fields.

This struct is constructed using the fields! macro.

Implementations

impl<'a> Fields<'a>

pub fn new(fields: &'a [(&'a str, Value<'a>)]) -> Fields<'a>

Creates a new Fields instance with the given fields.

pub fn pairs(&self) -> impl '_ + Iterator<Item = (&'a str, &'a Value<'a>)>

Iterate over the fields in the Fields struct.

pub fn get(&self, key: &str) -> Option<&'a Value<'a>>

Get a field by its key.

Examples found in repository

examples/basic.rs (line 29)

    fn on_new_context(&self, mut context: ContextRef<'_>, fields: Fields<'_>) {
        let foo_value = fields.get("foo").and_then(|value| value.as_bool());
        if let Some(foo_value) = foo_value {
            context.extensions_mut().insert(Foo(foo_value));
        }
    }

Trait Implementations

impl<'a> Clone for Fields<'a>

fn clone(&self) -> Fields<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Fields<'_>

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

Formats the value using the given formatter.