feat(napi): BigInt codegen support

examples/napi-compat-mode/src/napi6/bigint.rs

@@ -1,28 +1,28 @@
-use napi::{CallContext, JsBigint, JsNumber, JsObject, Result};
+use napi::{CallContext, JsBigInt, JsNumber, JsObject, Result};
 use std::convert::TryFrom;
 
 #[js_function]
-pub fn test_create_bigint_from_i64(ctx: CallContext) -> Result<JsBigint> {
+pub fn test_create_bigint_from_i64(ctx: CallContext) -> Result<JsBigInt> {
   ctx.env.create_bigint_from_i64(i64::max_value())
 }
 
 #[js_function]
-pub fn test_create_bigint_from_u64(ctx: CallContext) -> Result<JsBigint> {
+pub fn test_create_bigint_from_u64(ctx: CallContext) -> Result<JsBigInt> {
   ctx.env.create_bigint_from_u64(u64::max_value())
 }
 
 #[js_function]
-pub fn test_create_bigint_from_i128(ctx: CallContext) -> Result<JsBigint> {
+pub fn test_create_bigint_from_i128(ctx: CallContext) -> Result<JsBigInt> {
   ctx.env.create_bigint_from_i128(i128::max_value())
 }
 
 #[js_function]
-pub fn test_create_bigint_from_u128(ctx: CallContext) -> Result<JsBigint> {
+pub fn test_create_bigint_from_u128(ctx: CallContext) -> Result<JsBigInt> {
   ctx.env.create_bigint_from_u128(u128::max_value())
 }
 
 #[js_function]
-pub fn test_create_bigint_from_words(ctx: CallContext) -> Result<JsBigint> {
+pub fn test_create_bigint_from_words(ctx: CallContext) -> Result<JsBigInt> {
   ctx
     .env
     .create_bigint_from_words(true, vec![u64::max_value(), u64::max_value()])
@@ -30,14 +30,14 @@ pub fn test_create_bigint_from_words(ctx: CallContext) -> Result<JsBigint> {
 
 #[js_function(1)]
 pub fn test_get_bigint_i64(ctx: CallContext) -> Result<JsNumber> {
-  let js_bigint = ctx.get::<JsBigint>(0)?;
+  let js_bigint = ctx.get::<JsBigInt>(0)?;
   let val = i64::try_from(js_bigint)?;
   ctx.env.create_int32(val as i32)
 }
 
 #[js_function(1)]
 pub fn test_get_bigint_u64(ctx: CallContext) -> Result<JsNumber> {
-  let js_bigint = ctx.get::<JsBigint>(0)?;
+  let js_bigint = ctx.get::<JsBigInt>(0)?;
   let val = u64::try_from(js_bigint)?;
   ctx.env.create_int32(val as i32)
 }

examples/napi/__test__/typegen.spec.ts.md

@@ -13,6 +13,9 @@ Generated by [AVA](https://avajs.dev).
     export function sumNums(nums: Array<number>): number␊
     export function readFileAsync(path: string): Promise<Buffer>␊
     export function asyncMultiTwo(arg: number): Promise<number>␊
+    export function bigintAdd(a: BigInt, b: BigInt): BigInt␊
+    export function createBigInt(): BigInt␊
+    export function createBigIntI64(): BigInt␊
     export function getCwd(callback: (arg0: string) => void): void␊
     export function readFile(callback: (arg0: Error | undefined, arg1: string | null) => void): void␊
     export function eitherStringOrNumber(input: string | number): number␊

examples/napi/__test__/values.spec.ts

@@ -35,6 +35,9 @@ import {
   withoutAbortController,
   withAbortController,
   asyncMultiTwo,
+  bigintAdd,
+  createBigInt,
+  createBigIntI64,
 } from '../'
 
 test('number', (t) => {
@@ -217,3 +220,17 @@ MaybeTest('abort resolved task', async (t) => {
   await withAbortController(1, 2, ctrl.signal).then(() => ctrl.abort())
   t.pass('should not throw')
 })
+
+const BigIntTest = typeof BigInt !== 'undefined' ? test : test.skip
+
+BigIntTest('BigInt add', (t) => {
+  t.is(bigintAdd(BigInt(1), BigInt(2)), BigInt(3))
+})
+
+BigIntTest('create BigInt', (t) => {
+  t.is(createBigInt(), BigInt('-3689348814741910323300'))
+})
+
+BigIntTest('create BigInt i64', (t) => {
+  t.is(createBigIntI64(), BigInt(100))
+})

examples/napi/index.d.ts

@@ -3,6 +3,9 @@ export function getNums(): Array<number>
 export function sumNums(nums: Array<number>): number
 export function readFileAsync(path: string): Promise<Buffer>
 export function asyncMultiTwo(arg: number): Promise<number>
+export function bigintAdd(a: BigInt, b: BigInt): BigInt
+export function createBigInt(): BigInt
+export function createBigIntI64(): BigInt
 export function getCwd(callback: (arg0: string) => void): void
 export function readFile(callback: (arg0: Error | undefined, arg1: string | null) => void): void
 export function eitherStringOrNumber(input: string | number): number

examples/napi/src/bigint.rs

@@ -0,0 +1,19 @@
+use napi::bindgen_prelude::*;
+
+#[napi]
+fn bigint_add(a: BigInt, b: BigInt) -> u128 {
+  a.get_u128().1 + b.get_u128().1
+}
+
+#[napi]
+fn create_big_int() -> BigInt {
+  BigInt {
+    words: vec![100u64, 200u64],
+    sign_bit: true,
+  }
+}
+
+#[napi]
+fn create_big_int_i64() -> i64n {
+  i64n(100)
+}

examples/napi/src/lib.rs

@@ -5,6 +5,7 @@ extern crate serde_derive;
 
 mod array;
 mod r#async;
+mod bigint;
 mod callback;
 mod class;
 mod class_factory;

examples/napi/tsconfig.json

@@ -4,7 +4,7 @@
   "compilerOptions": {
     "outDir": "./dist",
     "rootDir": "__test__",
-    "target": "ES2015"
+    "target": "ES2018"
   },
   "exclude": ["dist", "index.d.ts"]
 }