langchain-rust 7.0.0

LangChain for Rust, the easiest way to write LLM-based programs in Rust
Documentation 
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use async_trait::async_trait;

use crate::semantic_router::{IndexError, Router};

/// Where a [`RouteLayer`](crate::semantic_router::RouteLayer) keeps its routes.
/// `Send + Sync` so a route layer can live in shared state and be used from spawned tasks.
#[async_trait]
pub trait Index: Send + Sync {
    async fn add(&mut self, router: &[Router]) -> Result<(), IndexError>;

    async fn delete(&mut self, route_name: &str) -> Result<(), IndexError>;

    /// Query the index with a vector and return the top_k most similar routes.
    /// Returns a list of tuples with the route name and the similarity score.
    /// Result<Vec<(route_name,similarity_score)>>
    async fn query(&self, vector: &[f64], top_k: usize) -> Result<Vec<(String, f64)>, IndexError>;

    async fn get_routers(&self) -> Result<Vec<Router>, IndexError>;

    async fn get_router(&self, route_name: &str) -> Result<Router, IndexError>;

    async fn delete_index(&mut self) -> Result<(), IndexError>;
}