anyval

A lightweight, dynamically‑typed value container for Rust.

anyval provides Map, Array, and Value types that let you store heterogeneous data (numbers, strings, booleans, nested maps/arrays) with a simple, ergonomic API. It’s ideal for configuration handling, scripting, or any situation where you need a flexible data model without pulling in a full‑blown JSON library.

Features

• Dynamic typing – Value can hold floats, ints, bools, strings, maps, arrays, or None.
• Zero‑allocation on creation – containers allocate only when needed.
• Serde support – optional serde integration for (de)serialization.
• Convenient macros – map! and array! for quick literal construction.
• Optional JSON helpers – to_json / from_json behind the json feature.

Quick start

# Add anyval with the desired features
cargo add anyval

# Add anyval without the default features (no json & serde)
cargo add anyval --no-default-features

use anyval::{map, array, Value};

fn main() {
    // Build a map with mixed types
    let cfg = map! {
        "host" => "localhost",
        "port" => 8080,
        "debug" => true,
        "paths" => array!["/api", "/static"],
    };

    // Access values
    println!("Host: {}", cfg["host"].as_str());
    println!("Port: {}", cfg["port"].as_int());

    // Serialize to JSON (requires the `json` feature)
    #[cfg(feature = "json")]
    println!("JSON: {}", cfg.to_json().unwrap());
}

Documentation

For full API details, examples, and feature flags, see the crate documentation:

https://docs.rs/anyval