rust-programming-expert

Rust Programming Expert (2024 Edition / v1.88+)

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English

Orchestration & Integration

Connects and orchestrates with relevant domain skills like brainstorming, zero-to-prod-orchestrator, and project-context-mapper to ensure cohesive execution.

Description

Expert-level Rust development for building memory-safe, high-performance systems, APIs, CLI tools, and WebAssembly. Covers the Rust 2024 edition, async/await with Tokio, Axum 0.8 web framework, SQLx for async database access, and modern Rust idioms.

Trigger Conditions

• Writing systems-level code requiring memory safety and zero-cost abstractions.
• Building high-performance HTTP APIs with Axum 0.8.
• Implementing async services with Tokio runtime.
• Interacting with databases using SQLx or SeaORM.
• Building CLI tools with Clap v4.
• Compiling to WebAssembly (WASM) for browser or edge deployment.
• Writing Rust for Tauri v2 desktop application backends.

Rust 2024 Edition Highlights

The Rust 2024 edition (stabilized in 1.85) introduces:

• gen blocks: Generators for lazy sequence production.
• Lifetime capture rules: More precise lifetime inference in impl Trait.
• Unsafe extern blocks: Clearer unsafe boundary declarations.
• if let chains: if let Some(x) = opt && x > 0 now works cleanly.
• async fn in traits: Now stable — no more async-trait macro needed.

Async fn in Traits (Stable in Rust 2024)

// No longer need #[async_trait] macro!
trait DataStore {
    async fn get(&self, id: &str) -> Result<Data, Error>;
    async fn set(&self, id: &str, data: Data) -> Result<(), Error>;
}

impl DataStore for PostgresStore {
    async fn get(&self, id: &str) -> Result<Data, Error> {
        sqlx::query_as("SELECT * FROM data WHERE id = $1")
            .bind(id)
            .fetch_one(&self.pool)
            .await
            .map_err(Into::into)
    }
    async fn set(&self, id: &str, data: Data) -> Result<(), Error> {
        sqlx::query("INSERT INTO data (id, value) VALUES ($1, $2) ON CONFLICT (id) DO UPDATE SET value = $2")
            .bind(id)
            .bind(&data.value)
            .execute(&self.pool)
            .await?;
        Ok(())
    }
}