Struct Aggregate 

pub struct Aggregate<V> { /* private fields */ }

An aggregate under construction.

The read direction does not build a structure in one go: a @mutable type is driven by the headers the writer wrote, in whatever order it wrote them, and the members the stream left out take their defaults afterwards. So the value is assembled by name, and the two things the assembly has to answer are whether a member is already in — §7.4.1.2.3’s defaulting asks it — and whether one arrived twice, which is a stream this type does not describe.

Insertion order is preserved and a repeat replaces in place, which is serde_json::Map::insert’s contract and the one the two @mutable readers were written against.

Implementations

impl<V> Aggregate<V>

pub const fn new() -> Self

A fresh, empty aggregate.

pub fn contains(&self, name: &str) -> bool

Whether a member of this name is already in.

pub fn insert(&mut self, name: String, value: V) -> Option<V>

Put a member in, answering with the one it replaced.

Some is what says a stream carried the same member twice.

pub fn into_entries(self) -> Vec<(String, V)>

The members, in the order they went in.

Trait Implementations

impl<V> Default for Aggregate<V>

fn default() -> Self

Returns the “default value” for a type.