History

LongYinan 1a3621b727 feat(napi): major upgrades for napi@1 1. inline everything 2. change `check_status` and `type_of` to macro 3. provide #[module_exports] macro 4. remove debug and repr[transparent] for ffi struct		2020-11-26 11:31:49 +08:00
..
src	feat(napi): major upgrades for napi@1	2020-11-26 11:31:49 +08:00
Cargo.toml	style: format toml files	2020-10-11 21:36:14 +08:00
README.md	Rename napi_rs to napi	2020-07-19 17:29:47 +08:00

README.md

napi-derive

js_function

#[macro_use]
extern crate napi;
#[macro_use]
extern crate napi_derive;

use napi::{CallContext, Error, JsNumber, JsUnknown, Module, Result, Status};
use std::convert::TryInto;

register_module!(napi_derive_example, init);

fn init(module: &mut Module) -> Result<()> {
  module.create_named_method("testThrow", test_throw)?;

  module.create_named_method("fibonacci", fibonacci)?;
  Ok(())
}

#[js_function]
fn test_throw(_ctx: CallContext) -> Result<JsUnknown> {
  Err(Error::from_status(Status::GenericFailure))
}

#[js_function(1)]
fn fibonacci(ctx: CallContext) -> Result<JsNumber> {
  let n = ctx.get::<JsNumber>(0)?.try_into()?;
  ctx.env.create_int64(fibonacci_native(n))
}

#[inline]
fn fibonacci_native(n: i64) -> i64 {
  match n {
    1 | 2 => 1,
    _ => fibonacci_native(n - 1) + fibonacci_native(n - 2),
  }
}