Add support for number slices of type MaybeUninit<T>

CHANGELOG.md

@@ -11,6 +11,9 @@
 * Add `WASM_BINDGEN_TEST_DRIVER_TIMEOUT` environment variable to control the timeout to start and connect to the test driver.
   [#4320](https://github.com/rustwasm/wasm-bindgen/pull/4320)
 
+* Add support for number slices of type `MaybeUninit<T>`.
+  [#4316](https://github.com/rustwasm/wasm-bindgen/pull/4316)
+
 ### Changed
 
 * Remove `once_cell/critical-section` requirement for `no_std` with atomics.

Cargo.toml

@@ -52,6 +52,7 @@ wasm-bindgen-test = { path = 'crates/test' }
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 js-sys = { path = 'crates/js-sys' }
+paste = "1"
 serde_derive = "1.0"
 wasm-bindgen-futures = { path = 'crates/futures' }
 wasm-bindgen-test-crate-a = { path = 'tests/crates/a' }

crates/cli/tests/reference/echo.d.ts

@@ -25,6 +25,14 @@ export function echo_vec_u32(a: Uint32Array): Uint32Array;
 export function echo_vec_i32(a: Int32Array): Int32Array;
 export function echo_vec_u64(a: BigUint64Array): BigUint64Array;
 export function echo_vec_i64(a: BigInt64Array): BigInt64Array;
+export function echo_vec_uninit_u8(a: Uint8Array): Uint8Array;
+export function echo_vec_uninit_i8(a: Int8Array): Int8Array;
+export function echo_vec_uninit_u16(a: Uint16Array): Uint16Array;
+export function echo_vec_uninit_i16(a: Int16Array): Int16Array;
+export function echo_vec_uninit_u32(a: Uint32Array): Uint32Array;
+export function echo_vec_uninit_i32(a: Int32Array): Int32Array;
+export function echo_vec_uninit_u64(a: BigUint64Array): BigUint64Array;
+export function echo_vec_uninit_i64(a: BigInt64Array): BigInt64Array;
 export function echo_vec_string(a: (string)[]): (string)[];
 export function echo_struct(a: Foo): Foo;
 export function echo_vec_struct(a: (Foo)[]): (Foo)[];
@@ -53,6 +61,14 @@ export function echo_option_vec_u32(a?: Uint32Array): Uint32Array | undefined;
 export function echo_option_vec_i32(a?: Int32Array): Int32Array | undefined;
 export function echo_option_vec_u64(a?: BigUint64Array): BigUint64Array | undefined;
 export function echo_option_vec_i64(a?: BigInt64Array): BigInt64Array | undefined;
+export function echo_option_vec_uninit_u8(a?: Uint8Array): Uint8Array | undefined;
+export function echo_option_vec_uninit_i8(a?: Int8Array): Int8Array | undefined;
+export function echo_option_vec_uninit_u16(a?: Uint16Array): Uint16Array | undefined;
+export function echo_option_vec_uninit_i16(a?: Int16Array): Int16Array | undefined;
+export function echo_option_vec_uninit_u32(a?: Uint32Array): Uint32Array | undefined;
+export function echo_option_vec_uninit_i32(a?: Int32Array): Int32Array | undefined;
+export function echo_option_vec_uninit_u64(a?: BigUint64Array): BigUint64Array | undefined;
+export function echo_option_vec_uninit_i64(a?: BigInt64Array): BigInt64Array | undefined;
 export function echo_option_vec_string(a?: (string)[]): (string)[] | undefined;
 export function echo_option_struct(a?: Foo): Foo | undefined;
 export function echo_option_vec_struct(a?: (Foo)[]): (Foo)[] | undefined;

crates/cli/tests/reference/echo.js

@@ -554,6 +554,110 @@ export function echo_vec_i64(a) {
     return v2;
 }
 
+/**
+ * @param {Uint8Array} a
+ * @returns {Uint8Array}
+ */
+export function echo_vec_uninit_u8(a) {
+    const ptr0 = passArray8ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_u8(ptr0, len0);
+    var v2 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
+    return v2;
+}
+
+/**
+ * @param {Int8Array} a
+ * @returns {Int8Array}
+ */
+export function echo_vec_uninit_i8(a) {
+    const ptr0 = passArray8ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_i8(ptr0, len0);
+    var v2 = getArrayI8FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
+    return v2;
+}
+
+/**
+ * @param {Uint16Array} a
+ * @returns {Uint16Array}
+ */
+export function echo_vec_uninit_u16(a) {
+    const ptr0 = passArray16ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_u16(ptr0, len0);
+    var v2 = getArrayU16FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 2, 2);
+    return v2;
+}
+
+/**
+ * @param {Int16Array} a
+ * @returns {Int16Array}
+ */
+export function echo_vec_uninit_i16(a) {
+    const ptr0 = passArray16ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_i16(ptr0, len0);
+    var v2 = getArrayI16FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 2, 2);
+    return v2;
+}
+
+/**
+ * @param {Uint32Array} a
+ * @returns {Uint32Array}
+ */
+export function echo_vec_uninit_u32(a) {
+    const ptr0 = passArray32ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_u32(ptr0, len0);
+    var v2 = getArrayU32FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
+    return v2;
+}
+
+/**
+ * @param {Int32Array} a
+ * @returns {Int32Array}
+ */
+export function echo_vec_uninit_i32(a) {
+    const ptr0 = passArray32ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_i32(ptr0, len0);
+    var v2 = getArrayI32FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
+    return v2;
+}
+
+/**
+ * @param {BigUint64Array} a
+ * @returns {BigUint64Array}
+ */
+export function echo_vec_uninit_u64(a) {
+    const ptr0 = passArray64ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_u64(ptr0, len0);
+    var v2 = getArrayU64FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 8, 8);
+    return v2;
+}
+
+/**
+ * @param {BigInt64Array} a
+ * @returns {BigInt64Array}
+ */
+export function echo_vec_uninit_i64(a) {
+    const ptr0 = passArray64ToWasm0(a, wasm.__wbindgen_malloc);
+    const len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_vec_uninit_i64(ptr0, len0);
+    var v2 = getArrayI64FromWasm0(ret[0], ret[1]).slice();
+    wasm.__wbindgen_free(ret[0], ret[1] * 8, 8);
+    return v2;
+}
+
 function addToExternrefTable0(obj) {
     const idx = wasm.__externref_table_alloc();
     wasm.__wbindgen_export_2.set(idx, obj);
@@ -912,6 +1016,134 @@ export function echo_option_vec_i64(a) {
     return v2;
 }
 
+/**
+ * @param {Uint8Array | undefined} [a]
+ * @returns {Uint8Array | undefined}
+ */
+export function echo_option_vec_uninit_u8(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray8ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_u8(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
+    }
+    return v2;
+}
+
+/**
+ * @param {Int8Array | undefined} [a]
+ * @returns {Int8Array | undefined}
+ */
+export function echo_option_vec_uninit_i8(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray8ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_i8(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayI8FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
+    }
+    return v2;
+}
+
+/**
+ * @param {Uint16Array | undefined} [a]
+ * @returns {Uint16Array | undefined}
+ */
+export function echo_option_vec_uninit_u16(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray16ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_u16(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayU16FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 2, 2);
+    }
+    return v2;
+}
+
+/**
+ * @param {Int16Array | undefined} [a]
+ * @returns {Int16Array | undefined}
+ */
+export function echo_option_vec_uninit_i16(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray16ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_i16(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayI16FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 2, 2);
+    }
+    return v2;
+}
+
+/**
+ * @param {Uint32Array | undefined} [a]
+ * @returns {Uint32Array | undefined}
+ */
+export function echo_option_vec_uninit_u32(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray32ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_u32(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayU32FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
+    }
+    return v2;
+}
+
+/**
+ * @param {Int32Array | undefined} [a]
+ * @returns {Int32Array | undefined}
+ */
+export function echo_option_vec_uninit_i32(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray32ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_i32(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayI32FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 4, 4);
+    }
+    return v2;
+}
+
+/**
+ * @param {BigUint64Array | undefined} [a]
+ * @returns {BigUint64Array | undefined}
+ */
+export function echo_option_vec_uninit_u64(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray64ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_u64(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayU64FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 8, 8);
+    }
+    return v2;
+}
+
+/**
+ * @param {BigInt64Array | undefined} [a]
+ * @returns {BigInt64Array | undefined}
+ */
+export function echo_option_vec_uninit_i64(a) {
+    var ptr0 = isLikeNone(a) ? 0 : passArray64ToWasm0(a, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    const ret = wasm.echo_option_vec_uninit_i64(ptr0, len0);
+    let v2;
+    if (ret[0] !== 0) {
+        v2 = getArrayI64FromWasm0(ret[0], ret[1]).slice();
+        wasm.__wbindgen_free(ret[0], ret[1] * 8, 8);
+    }
+    return v2;
+}
+
 /**
  * @param {(string)[] | undefined} [a]
  * @returns {(string)[] | undefined}

crates/cli/tests/reference/echo.rs

@@ -1,3 +1,4 @@
+use std::mem::MaybeUninit;
 use wasm_bindgen::prelude::*;
 
 #[wasm_bindgen]
@@ -42,6 +43,14 @@ echo!(
     (echo_vec_i32, Vec<i32>),
     (echo_vec_u64, Vec<u64>),
     (echo_vec_i64, Vec<i64>),
+    (echo_vec_uninit_u8, Vec<MaybeUninit<u8>>),
+    (echo_vec_uninit_i8, Vec<MaybeUninit<i8>>),
+    (echo_vec_uninit_u16, Vec<MaybeUninit<u16>>),
+    (echo_vec_uninit_i16, Vec<MaybeUninit<i16>>),
+    (echo_vec_uninit_u32, Vec<MaybeUninit<u32>>),
+    (echo_vec_uninit_i32, Vec<MaybeUninit<i32>>),
+    (echo_vec_uninit_u64, Vec<MaybeUninit<u64>>),
+    (echo_vec_uninit_i64, Vec<MaybeUninit<i64>>),
     (echo_vec_string, Vec<String>),
     (echo_struct, Foo),
     (echo_vec_struct, Vec<Foo>),
@@ -70,6 +79,14 @@ echo!(
     (echo_option_vec_i32, Option<Vec<i32>>),
     (echo_option_vec_u64, Option<Vec<u64>>),
     (echo_option_vec_i64, Option<Vec<i64>>),
+    (echo_option_vec_uninit_u8, Option<Vec<MaybeUninit<u8>>>),
+    (echo_option_vec_uninit_i8, Option<Vec<MaybeUninit<i8>>>),
+    (echo_option_vec_uninit_u16, Option<Vec<MaybeUninit<u16>>>),
+    (echo_option_vec_uninit_i16, Option<Vec<MaybeUninit<i16>>>),
+    (echo_option_vec_uninit_u32, Option<Vec<MaybeUninit<u32>>>),
+    (echo_option_vec_uninit_i32, Option<Vec<MaybeUninit<i32>>>),
+    (echo_option_vec_uninit_u64, Option<Vec<MaybeUninit<u64>>>),
+    (echo_option_vec_uninit_i64, Option<Vec<MaybeUninit<i64>>>),
     (echo_option_vec_string, Option<Vec<String>>),
     (echo_option_struct, Option<Foo>),
     (echo_option_vec_struct, Option<Vec<Foo>>)