v5

node_modules/@babel/traverse/lib/path/conversion.js

@@ -0,0 +1,465 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.toComputedKey = toComputedKey;
+exports.ensureBlock = ensureBlock;
+exports.arrowFunctionToShadowed = arrowFunctionToShadowed;
+exports.unwrapFunctionEnvironment = unwrapFunctionEnvironment;
+exports.arrowFunctionToExpression = arrowFunctionToExpression;
+
+function t() {
+  const data = _interopRequireWildcard(require("@babel/types"));
+
+  t = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _helperFunctionName() {
+  const data = _interopRequireDefault(require("@babel/helper-function-name"));
+
+  _helperFunctionName = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+function toComputedKey() {
+  const node = this.node;
+  let key;
+
+  if (this.isMemberExpression()) {
+    key = node.property;
+  } else if (this.isProperty() || this.isMethod()) {
+    key = node.key;
+  } else {
+    throw new ReferenceError("todo");
+  }
+
+  if (!node.computed) {
+    if (t().isIdentifier(key)) key = t().stringLiteral(key.name);
+  }
+
+  return key;
+}
+
+function ensureBlock() {
+  const body = this.get("body");
+  const bodyNode = body.node;
+
+  if (Array.isArray(body)) {
+    throw new Error("Can't convert array path to a block statement");
+  }
+
+  if (!bodyNode) {
+    throw new Error("Can't convert node without a body");
+  }
+
+  if (body.isBlockStatement()) {
+    return bodyNode;
+  }
+
+  const statements = [];
+  let stringPath = "body";
+  let key;
+  let listKey;
+
+  if (body.isStatement()) {
+    listKey = "body";
+    key = 0;
+    statements.push(body.node);
+  } else {
+    stringPath += ".body.0";
+
+    if (this.isFunction()) {
+      key = "argument";
+      statements.push(t().returnStatement(body.node));
+    } else {
+      key = "expression";
+      statements.push(t().expressionStatement(body.node));
+    }
+  }
+
+  this.node.body = t().blockStatement(statements);
+  const parentPath = this.get(stringPath);
+  body.setup(parentPath, listKey ? parentPath.node[listKey] : parentPath.node, listKey, key);
+  return this.node;
+}
+
+function arrowFunctionToShadowed() {
+  if (!this.isArrowFunctionExpression()) return;
+  this.arrowFunctionToExpression();
+}
+
+function unwrapFunctionEnvironment() {
+  if (!this.isArrowFunctionExpression() && !this.isFunctionExpression() && !this.isFunctionDeclaration()) {
+    throw this.buildCodeFrameError("Can only unwrap the environment of a function.");
+  }
+
+  hoistFunctionEnvironment(this);
+}
+
+function arrowFunctionToExpression({
+  allowInsertArrow = true,
+  specCompliant = false
+} = {}) {
+  if (!this.isArrowFunctionExpression()) {
+    throw this.buildCodeFrameError("Cannot convert non-arrow function to a function expression.");
+  }
+
+  const thisBinding = hoistFunctionEnvironment(this, specCompliant, allowInsertArrow);
+  this.ensureBlock();
+  this.node.type = "FunctionExpression";
+
+  if (specCompliant) {
+    const checkBinding = thisBinding ? null : this.parentPath.scope.generateUidIdentifier("arrowCheckId");
+
+    if (checkBinding) {
+      this.parentPath.scope.push({
+        id: checkBinding,
+        init: t().objectExpression([])
+      });
+    }
+
+    this.get("body").unshiftContainer("body", t().expressionStatement(t().callExpression(this.hub.addHelper("newArrowCheck"), [t().thisExpression(), checkBinding ? t().identifier(checkBinding.name) : t().identifier(thisBinding)])));
+    this.replaceWith(t().callExpression(t().memberExpression((0, _helperFunctionName().default)(this, true) || this.node, t().identifier("bind")), [checkBinding ? t().identifier(checkBinding.name) : t().thisExpression()]));
+  }
+}
+
+function hoistFunctionEnvironment(fnPath, specCompliant = false, allowInsertArrow = true) {
+  const thisEnvFn = fnPath.findParent(p => {
+    return p.isFunction() && !p.isArrowFunctionExpression() || p.isProgram() || p.isClassProperty({
+      static: false
+    });
+  });
+  const inConstructor = thisEnvFn && thisEnvFn.node.kind === "constructor";
+
+  if (thisEnvFn.isClassProperty()) {
+    throw fnPath.buildCodeFrameError("Unable to transform arrow inside class property");
+  }
+
+  const {
+    thisPaths,
+    argumentsPaths,
+    newTargetPaths,
+    superProps,
+    superCalls
+  } = getScopeInformation(fnPath);
+
+  if (inConstructor && superCalls.length > 0) {
+    if (!allowInsertArrow) {
+      throw superCalls[0].buildCodeFrameError("Unable to handle nested super() usage in arrow");
+    }
+
+    const allSuperCalls = [];
+    thisEnvFn.traverse({
+      Function(child) {
+        if (child.isArrowFunctionExpression()) return;
+        child.skip();
+      },
+
+      ClassProperty(child) {
+        child.skip();
+      },
+
+      CallExpression(child) {
+        if (!child.get("callee").isSuper()) return;
+        allSuperCalls.push(child);
+      }
+
+    });
+    const superBinding = getSuperBinding(thisEnvFn);
+    allSuperCalls.forEach(superCall => {
+      const callee = t().identifier(superBinding);
+      callee.loc = superCall.node.callee.loc;
+      superCall.get("callee").replaceWith(callee);
+    });
+  }
+
+  let thisBinding;
+
+  if (thisPaths.length > 0 || specCompliant) {
+    thisBinding = getThisBinding(thisEnvFn, inConstructor);
+
+    if (!specCompliant || inConstructor && hasSuperClass(thisEnvFn)) {
+      thisPaths.forEach(thisChild => {
+        const thisRef = thisChild.isJSX() ? t().jsxIdentifier(thisBinding) : t().identifier(thisBinding);
+        thisRef.loc = thisChild.node.loc;
+        thisChild.replaceWith(thisRef);
+      });
+      if (specCompliant) thisBinding = null;
+    }
+  }
+
+  if (argumentsPaths.length > 0) {
+    const argumentsBinding = getBinding(thisEnvFn, "arguments", () => t().identifier("arguments"));
+    argumentsPaths.forEach(argumentsChild => {
+      const argsRef = t().identifier(argumentsBinding);
+      argsRef.loc = argumentsChild.node.loc;
+      argumentsChild.replaceWith(argsRef);
+    });
+  }
+
+  if (newTargetPaths.length > 0) {
+    const newTargetBinding = getBinding(thisEnvFn, "newtarget", () => t().metaProperty(t().identifier("new"), t().identifier("target")));
+    newTargetPaths.forEach(targetChild => {
+      const targetRef = t().identifier(newTargetBinding);
+      targetRef.loc = targetChild.node.loc;
+      targetChild.replaceWith(targetRef);
+    });
+  }
+
+  if (superProps.length > 0) {
+    if (!allowInsertArrow) {
+      throw superProps[0].buildCodeFrameError("Unable to handle nested super.prop usage");
+    }
+
+    const flatSuperProps = superProps.reduce((acc, superProp) => acc.concat(standardizeSuperProperty(superProp)), []);
+    flatSuperProps.forEach(superProp => {
+      const key = superProp.node.computed ? "" : superProp.get("property").node.name;
+
+      if (superProp.parentPath.isCallExpression({
+        callee: superProp.node
+      })) {
+        const superBinding = getSuperPropCallBinding(thisEnvFn, key);
+
+        if (superProp.node.computed) {
+          const prop = superProp.get("property").node;
+          superProp.replaceWith(t().identifier(superBinding));
+          superProp.parentPath.node.arguments.unshift(prop);
+        } else {
+          superProp.replaceWith(t().identifier(superBinding));
+        }
+      } else {
+        const isAssignment = superProp.parentPath.isAssignmentExpression({
+          left: superProp.node
+        });
+        const superBinding = getSuperPropBinding(thisEnvFn, isAssignment, key);
+        const args = [];
+
+        if (superProp.node.computed) {
+          args.push(superProp.get("property").node);
+        }
+
+        if (isAssignment) {
+          const value = superProp.parentPath.node.right;
+          args.push(value);
+          superProp.parentPath.replaceWith(t().callExpression(t().identifier(superBinding), args));
+        } else {
+          superProp.replaceWith(t().callExpression(t().identifier(superBinding), args));
+        }
+      }
+    });
+  }
+
+  return thisBinding;
+}
+
+function standardizeSuperProperty(superProp) {
+  if (superProp.parentPath.isAssignmentExpression() && superProp.parentPath.node.operator !== "=") {
+    const assignmentPath = superProp.parentPath;
+    const op = assignmentPath.node.operator.slice(0, -1);
+    const value = assignmentPath.node.right;
+    assignmentPath.node.operator = "=";
+
+    if (superProp.node.computed) {
+      const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
+      assignmentPath.get("left").replaceWith(t().memberExpression(superProp.node.object, t().assignmentExpression("=", tmp, superProp.node.property), true));
+      assignmentPath.get("right").replaceWith(t().binaryExpression(op, t().memberExpression(superProp.node.object, t().identifier(tmp.name), true), value));
+    } else {
+      assignmentPath.get("left").replaceWith(t().memberExpression(superProp.node.object, superProp.node.property));
+      assignmentPath.get("right").replaceWith(t().binaryExpression(op, t().memberExpression(superProp.node.object, t().identifier(superProp.node.property.name)), value));
+    }
+
+    return [assignmentPath.get("left"), assignmentPath.get("right").get("left")];
+  } else if (superProp.parentPath.isUpdateExpression()) {
+    const updateExpr = superProp.parentPath;
+    const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
+    const computedKey = superProp.node.computed ? superProp.scope.generateDeclaredUidIdentifier("prop") : null;
+    const parts = [t().assignmentExpression("=", tmp, t().memberExpression(superProp.node.object, computedKey ? t().assignmentExpression("=", computedKey, superProp.node.property) : superProp.node.property, superProp.node.computed)), t().assignmentExpression("=", t().memberExpression(superProp.node.object, computedKey ? t().identifier(computedKey.name) : superProp.node.property, superProp.node.computed), t().binaryExpression("+", t().identifier(tmp.name), t().numericLiteral(1)))];
+
+    if (!superProp.parentPath.node.prefix) {
+      parts.push(t().identifier(tmp.name));
+    }
+
+    updateExpr.replaceWith(t().sequenceExpression(parts));
+    const left = updateExpr.get("expressions.0.right");
+    const right = updateExpr.get("expressions.1.left");
+    return [left, right];
+  }
+
+  return [superProp];
+}
+
+function hasSuperClass(thisEnvFn) {
+  return thisEnvFn.isClassMethod() && !!thisEnvFn.parentPath.parentPath.node.superClass;
+}
+
+function getThisBinding(thisEnvFn, inConstructor) {
+  return getBinding(thisEnvFn, "this", thisBinding => {
+    if (!inConstructor || !hasSuperClass(thisEnvFn)) return t().thisExpression();
+    const supers = new WeakSet();
+    thisEnvFn.traverse({
+      Function(child) {
+        if (child.isArrowFunctionExpression()) return;
+        child.skip();
+      },
+
+      ClassProperty(child) {
+        child.skip();
+      },
+
+      CallExpression(child) {
+        if (!child.get("callee").isSuper()) return;
+        if (supers.has(child.node)) return;
+        supers.add(child.node);
+        child.replaceWithMultiple([child.node, t().assignmentExpression("=", t().identifier(thisBinding), t().identifier("this"))]);
+      }
+
+    });
+  });
+}
+
+function getSuperBinding(thisEnvFn) {
+  return getBinding(thisEnvFn, "supercall", () => {
+    const argsBinding = thisEnvFn.scope.generateUidIdentifier("args");
+    return t().arrowFunctionExpression([t().restElement(argsBinding)], t().callExpression(t().super(), [t().spreadElement(t().identifier(argsBinding.name))]));
+  });
+}
+
+function getSuperPropCallBinding(thisEnvFn, propName) {
+  return getBinding(thisEnvFn, `superprop_call:${propName || ""}`, () => {
+    const argsBinding = thisEnvFn.scope.generateUidIdentifier("args");
+    const argsList = [t().restElement(argsBinding)];
+    let fnBody;
+
+    if (propName) {
+      fnBody = t().callExpression(t().memberExpression(t().super(), t().identifier(propName)), [t().spreadElement(t().identifier(argsBinding.name))]);
+    } else {
+      const method = thisEnvFn.scope.generateUidIdentifier("prop");
+      argsList.unshift(method);
+      fnBody = t().callExpression(t().memberExpression(t().super(), t().identifier(method.name), true), [t().spreadElement(t().identifier(argsBinding.name))]);
+    }
+
+    return t().arrowFunctionExpression(argsList, fnBody);
+  });
+}
+
+function getSuperPropBinding(thisEnvFn, isAssignment, propName) {
+  const op = isAssignment ? "set" : "get";
+  return getBinding(thisEnvFn, `superprop_${op}:${propName || ""}`, () => {
+    const argsList = [];
+    let fnBody;
+
+    if (propName) {
+      fnBody = t().memberExpression(t().super(), t().identifier(propName));
+    } else {
+      const method = thisEnvFn.scope.generateUidIdentifier("prop");
+      argsList.unshift(method);
+      fnBody = t().memberExpression(t().super(), t().identifier(method.name), true);
+    }
+
+    if (isAssignment) {
+      const valueIdent = thisEnvFn.scope.generateUidIdentifier("value");
+      argsList.push(valueIdent);
+      fnBody = t().assignmentExpression("=", fnBody, t().identifier(valueIdent.name));
+    }
+
+    return t().arrowFunctionExpression(argsList, fnBody);
+  });
+}
+
+function getBinding(thisEnvFn, key, init) {
+  const cacheKey = "binding:" + key;
+  let data = thisEnvFn.getData(cacheKey);
+
+  if (!data) {
+    const id = thisEnvFn.scope.generateUidIdentifier(key);
+    data = id.name;
+    thisEnvFn.setData(cacheKey, data);
+    thisEnvFn.scope.push({
+      id: id,
+      init: init(data)
+    });
+  }
+
+  return data;
+}
+
+function getScopeInformation(fnPath) {
+  const thisPaths = [];
+  const argumentsPaths = [];
+  const newTargetPaths = [];
+  const superProps = [];
+  const superCalls = [];
+  fnPath.traverse({
+    ClassProperty(child) {
+      child.skip();
+    },
+
+    Function(child) {
+      if (child.isArrowFunctionExpression()) return;
+      child.skip();
+    },
+
+    ThisExpression(child) {
+      thisPaths.push(child);
+    },
+
+    JSXIdentifier(child) {
+      if (child.node.name !== "this") return;
+
+      if (!child.parentPath.isJSXMemberExpression({
+        object: child.node
+      }) && !child.parentPath.isJSXOpeningElement({
+        name: child.node
+      })) {
+        return;
+      }
+
+      thisPaths.push(child);
+    },
+
+    CallExpression(child) {
+      if (child.get("callee").isSuper()) superCalls.push(child);
+    },
+
+    MemberExpression(child) {
+      if (child.get("object").isSuper()) superProps.push(child);
+    },
+
+    ReferencedIdentifier(child) {
+      if (child.node.name !== "arguments") return;
+      argumentsPaths.push(child);
+    },
+
+    MetaProperty(child) {
+      if (!child.get("meta").isIdentifier({
+        name: "new"
+      })) return;
+      if (!child.get("property").isIdentifier({
+        name: "target"
+      })) return;
+      newTargetPaths.push(child);
+    }
+
+  });
+  return {
+    thisPaths,
+    argumentsPaths,
+    newTargetPaths,
+    superProps,
+    superCalls
+  };
+}