Struct MessagesState 

pub struct MessagesState {
    pub messages: Vec<Message>,
}

State that contains a list of messages.

This is the standard state type for chat applications and agent workflows. The add_messages function provides the reducer logic.

Example

use rust_langgraph::{State, MessagesState, Message};

let mut state = MessagesState {
    messages: vec![Message::user("Hello!")],
};

let update = MessagesState {
    messages: vec![Message::assistant("Hi there!")],
};

state.merge(update).unwrap();
assert_eq!(state.messages.len(), 2);

Fields

messages: Vec<Message>

The list of messages

Trait Implementations

impl Clone for MessagesState

fn clone(&self) -> MessagesState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessagesState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MessagesState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MessagesState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl State for MessagesState

fn merge(&mut self, other: Self) -> Result<()>

Merge another state into this one.

fn to_value(&self) -> Result<Value>

Convert state to JSON value (default implementation)

fn from_value(value: Value) -> Result<Self>

Create state from JSON value (default implementation)