Function main

examples/wasm-rust.rs:22–71

Examples of using WebAssembly compiled from Rust with tinywasm. These examples are meant to be run with `cargo run --example wasm-rust `. For example, `cargo run --example wasm-rust hello`. To run these, you first need to compile the Rust examples to WebAssembly: ```sh ./examples/rust/build.sh ``` This requires the `wasm32-unknown-unknown` target, `binaryen`, and `wabt` to be installe

()

/// <https://github.com/WebAssembly/wabt>
/// <https://github.com/WebAssembly/binaryen>
fn main() -> Result<()> {
    pretty_env_logger::init();

    if !std::path::Path::new("./examples/rust/out/").exists() {
        return Err(eyre!("No WebAssembly files found. See examples/wasm-rust.rs for instructions."));
    }

    let args = std::env::args().collect::<Vec<_>>();
    if args.len() < 2 {
        println!("Usage: cargo run --example wasm-rust <rust_example>");
        println!("Available examples:");
        println!("  hello");
        println!("  printi32");
        println!("  host_fn");
        println!("  fibonacci - calculate fibonacci(30)");
        println!("  tinywasm - run printi32 inside of tinywasm inside of itself");
        println!("  argon2id - run argon2id(1000, 2, 1)");
        return Ok(());
    }

    match args[1].as_str() {
        "hello" => hello()?,
        "printi32" => printi32()?,
        "fibonacci" => fibonacci()?,
        "tinywasm" => tinywasm()?,
        "tinywasm_no_std" => tinywasm_no_std()?,
        "argon2id" => argon2id()?,
        "host_fn" => host_fn()?,
        "all" => {
            println!("Running all examples");
            println!("\nhello.wasm:");
            hello()?;
            println!("\nprinti32.wasm:");
            printi32()?;
            println!("\nfibonacci.wasm:");
            fibonacci()?;
            println!("\ntinywasm.wasm:");
            tinywasm()?;
            println!("\ntinywasm_no_std.wasm:");
            tinywasm_no_std()?;
            println!("argon2id.wasm:");
            argon2id()?;
            println!("\nhost_fn.wasm:");
            host_fn()?;
        }
        _ => {}
    }

    Ok(())
}

fn tinywasm() -> Result<()> {
    let module = tinywasm::parse_file("./examples/rust/out/tinywasm.opt.wasm")?;