lib.rs

#![cfg_attr(docsrs, feature(doc_cfg))]
#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms)]
#![deny(unreachable_pub)]
#![deny(private_bounds)]
#![deny(rustdoc::private_intra_doc_links)]
#![deny(private_interfaces)]

//! {{project-name}}

use wasm_bindgen::prelude::wasm_bindgen;

/// Add two integers together.
#[wasm_bindgen]
pub fn add(a: i32, b: i32) -> i32 {
    a + b
}

//------------------------------------------------------------------------------
// Utilities
//------------------------------------------------------------------------------

/// Panic hook lets us get better error messages if our Rust code ever panics.
///
/// For more details see
/// <https://github.com/rustwasm/console_error_panic_hook#readme>
#[wasm_bindgen(js_name = "setPanicHook")]
pub fn set_panic_hook() {
    #[cfg(feature = "console_error_panic_hook")]
    console_error_panic_hook::set_once();
}

#[wasm_bindgen]
extern "C" {
    /// For alerting
    pub(crate) fn alert(s: &str);
    /// For logging in the console.
    #[wasm_bindgen(js_namespace = console)]
    pub fn log(s: &str);
}

//------------------------------------------------------------------------------
// Macros
//------------------------------------------------------------------------------

/// Return a representation of an object owned by JS.
#[macro_export]
macro_rules! value {
    ($value:expr) => {
        wasm_bindgen::JsValue::from($value)
    };
}

/// Calls the wasm_bindgen console.log.
#[macro_export]
macro_rules! console_log {
    ($($t:tt)*) => ($crate::log(&format_args!($($t)*).to_string()))
}