FIN INIT

node_modules/sucrase/dist/esm/HelperManager.js

@@ -0,0 +1,176 @@
+
+
+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;
+    }
+  `,
+};
+
+export 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;
+  }
+}