@emnapi/ts-transform-emscripten-esm-library
Example: see https://github.com/toyobayashi/emnapi/blob/main/packages/ts-transform-emscripten-esm-library/test
const {
transformWithOptions
} = require('@emnapi/ts-transform-emscripten-esm-library')
/** @type {string} */
const output = transformWithOptions(
'filename.js',
/** @type {string} */ input,
{
/** @type {string[]} */
defaultLibraryFuncsToInclude: [ /* ... */],
/** @type {string[]} */
exportedRuntimeMethods: [ /* ... */ ],
/** @type {boolean} */
processDirective: true,
/** @type {boolean} */
processParseTools: true,
/** @type {string} */
runtimeModuleSpecifier: 'emscripten:runtime',
/** @type {string} */
parseToolsModuleSpecifier: 'emscripten:parse-tools'
}
)| input | output |
|---|---|
export function x () {
return 42
} |
function _x() {
return 42
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
x: _x
}) |
export function $x () {
return 42
} |
function x() {
return 42
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
$x: x
}) |
export const x = getX()
function getX() {
return 42
} |
const _x = getX()
function getX() {
return 42;
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
$getX: getX,
x: "getX()",
x__deps: ["$getX"]
}); |
const localVar = 10
function f () {
console.log(localVar)
}
function localFunc() {
f()
console.log(localVar)
}
export {
localVar as exportedVar,
localFunc as exportedFunc
} |
const _exportedVar = 10
function f() {
console.log(_exportedVar)
}
function _exportedFunc() {
f()
console.log(_exportedVar)
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
exportedVar: "10",
$f: f,
$f__deps: ["exportedVar"],
exportedFunc: _exportedFunc,
exportedFunc__deps: ["$f", "exportedVar"]
}) |
/** @__deps $external */
export function x() {}
/**
* @__deps emscripten_resize_heap
* @__deps $runtimeKeepalivePush
* @__deps $runtimeKeepalivePop
* @__sig v
* @__postset
* ```
* console.log(42);
* console.log(_y);
* ```
*
* @returns {void}
*/
export function y() {
runtimeKeepalivePush()
runtimeKeepalivePop()
_emscripten_resize_heap()
return x()
} |
/** @__deps $external */
function _x() { }
/**
* @__deps emscripten_resize_heap
* @__deps $runtimeKeepalivePush
* @__deps $runtimeKeepalivePop
* @__sig v
* @__postset
* ```
* console.log(42);
* console.log(_y);
* ```
*
* @returns {void}
*/
function _y() {
runtimeKeepalivePush()
runtimeKeepalivePop()
_emscripten_resize_heap()
return _x()
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
x: _x,
x__deps: ["$external"],
y: _y,
y__deps: [
"x",
"emscripten_resize_heap",
"$runtimeKeepalivePush",
"$runtimeKeepalivePop"
],
y__sig: "v",
y__postset: "console.log(42);\nconsole.log(_y);"
}) |
export function getPointerSize () {
let result
// #if MEMORY64
result = 8
// #else
result = 4
// #endif
return result
} |
function _getPointerSize() {
let result
#if MEMORY64
result = 8
#else
result = 4
#endif
return result
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
getPointerSize: _getPointerSize
}) |
import {
from64,
makeSetValue,
SIZE_TYPE,
POINTER_SIZE
} from 'emscripten:parse-tools'
import {
wasmMemory,
HEAPU8
} from 'emscripten:runtime'
export function getPointerSize (ret) {
from64('ret')
makeSetValue('ret', 0, POINTER_SIZE, SIZE_TYPE)
console.log(HEAPU8.buffer === wasmMemory.buffer)
return POINTER_SIZE
} |
function _getPointerSize(ret) {
{{{ from64('ret') }}}
{{{ makeSetValue('ret', 0, POINTER_SIZE, SIZE_TYPE) }}}
console.log(HEAPU8.buffer === wasmMemory.buffer)
return {{{ POINTER_SIZE }}}
}
(typeof addToLibrary === "function"
? addToLibrary :
(...args) => mergeInto(
LibraryManager.library, ...args)
)({
getPointerSize: _getPointerSize
}); |