fediversity.eu/node_modules/sucrase/dist/HelperManager.js
2024-03-26 16:28:28 +01:00

177 lines
5.6 KiB
JavaScript

"use strict";Object.defineProperty(exports, "__esModule", {value: true});
const HELPERS = {
require: `
import {createRequire as CREATE_REQUIRE_NAME} from "module";
const require = CREATE_REQUIRE_NAME(import.meta.url);
`,
interopRequireWildcard: `
function interopRequireWildcard(obj) {
if (obj && obj.__esModule) {
return obj;
} else {
var newObj = {};
if (obj != null) {
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
newObj[key] = obj[key];
}
}
}
newObj.default = obj;
return newObj;
}
}
`,
interopRequireDefault: `
function interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : { default: obj };
}
`,
createNamedExportFrom: `
function createNamedExportFrom(obj, localName, importedName) {
Object.defineProperty(exports, localName, {enumerable: true, configurable: true, get: () => obj[importedName]});
}
`,
// Note that TypeScript and Babel do this differently; TypeScript does a simple existence
// check in the exports object and does a plain assignment, whereas Babel uses
// defineProperty and builds an object of explicitly-exported names so that star exports can
// always take lower precedence. For now, we do the easier TypeScript thing.
createStarExport: `
function createStarExport(obj) {
Object.keys(obj)
.filter((key) => key !== "default" && key !== "__esModule")
.forEach((key) => {
if (exports.hasOwnProperty(key)) {
return;
}
Object.defineProperty(exports, key, {enumerable: true, configurable: true, get: () => obj[key]});
});
}
`,
nullishCoalesce: `
function nullishCoalesce(lhs, rhsFn) {
if (lhs != null) {
return lhs;
} else {
return rhsFn();
}
}
`,
asyncNullishCoalesce: `
async function asyncNullishCoalesce(lhs, rhsFn) {
if (lhs != null) {
return lhs;
} else {
return await rhsFn();
}
}
`,
optionalChain: `
function optionalChain(ops) {
let lastAccessLHS = undefined;
let value = ops[0];
let i = 1;
while (i < ops.length) {
const op = ops[i];
const fn = ops[i + 1];
i += 2;
if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {
return undefined;
}
if (op === 'access' || op === 'optionalAccess') {
lastAccessLHS = value;
value = fn(value);
} else if (op === 'call' || op === 'optionalCall') {
value = fn((...args) => value.call(lastAccessLHS, ...args));
lastAccessLHS = undefined;
}
}
return value;
}
`,
asyncOptionalChain: `
async function asyncOptionalChain(ops) {
let lastAccessLHS = undefined;
let value = ops[0];
let i = 1;
while (i < ops.length) {
const op = ops[i];
const fn = ops[i + 1];
i += 2;
if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {
return undefined;
}
if (op === 'access' || op === 'optionalAccess') {
lastAccessLHS = value;
value = await fn(value);
} else if (op === 'call' || op === 'optionalCall') {
value = await fn((...args) => value.call(lastAccessLHS, ...args));
lastAccessLHS = undefined;
}
}
return value;
}
`,
optionalChainDelete: `
function optionalChainDelete(ops) {
const result = OPTIONAL_CHAIN_NAME(ops);
return result == null ? true : result;
}
`,
asyncOptionalChainDelete: `
async function asyncOptionalChainDelete(ops) {
const result = await ASYNC_OPTIONAL_CHAIN_NAME(ops);
return result == null ? true : result;
}
`,
};
class HelperManager {
__init() {this.helperNames = {}}
__init2() {this.createRequireName = null}
constructor( nameManager) {;this.nameManager = nameManager;HelperManager.prototype.__init.call(this);HelperManager.prototype.__init2.call(this);}
getHelperName(baseName) {
let helperName = this.helperNames[baseName];
if (helperName) {
return helperName;
}
helperName = this.nameManager.claimFreeName(`_${baseName}`);
this.helperNames[baseName] = helperName;
return helperName;
}
emitHelpers() {
let resultCode = "";
if (this.helperNames.optionalChainDelete) {
this.getHelperName("optionalChain");
}
if (this.helperNames.asyncOptionalChainDelete) {
this.getHelperName("asyncOptionalChain");
}
for (const [baseName, helperCodeTemplate] of Object.entries(HELPERS)) {
const helperName = this.helperNames[baseName];
let helperCode = helperCodeTemplate;
if (baseName === "optionalChainDelete") {
helperCode = helperCode.replace("OPTIONAL_CHAIN_NAME", this.helperNames.optionalChain);
} else if (baseName === "asyncOptionalChainDelete") {
helperCode = helperCode.replace(
"ASYNC_OPTIONAL_CHAIN_NAME",
this.helperNames.asyncOptionalChain,
);
} else if (baseName === "require") {
if (this.createRequireName === null) {
this.createRequireName = this.nameManager.claimFreeName("_createRequire");
}
helperCode = helperCode.replace(/CREATE_REQUIRE_NAME/g, this.createRequireName);
}
if (helperName) {
resultCode += " ";
resultCode += helperCode.replace(baseName, helperName).replace(/\s+/g, " ").trim();
}
}
return resultCode;
}
} exports.HelperManager = HelperManager;