@babel/plugin-transform-parameters - npm Package Compare versions

Comparing version 7.22.5 to 8.0.0-alpha.0

lib/index.js

@@ -1,21 +0,470 @@
-"use strict";
+import { declare } from '@babel/helper-plugin-utils';
+import { types, template } from '@babel/core';
 
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-Object.defineProperty(exports, "convertFunctionParams", {
-  enumerable: true,
-  get: function () {
-    return _params.default;
+const iifeVisitor = {
+  "ReferencedIdentifier|BindingIdentifier"(path, state) {
+    const {
+      scope,
+      node
+    } = path;
+    const {
+      name
+    } = node;
+    if (name === "eval" || scope.getBinding(name) === state.scope.parent.getBinding(name) && state.scope.hasOwnBinding(name)) {
+      state.needsOuterBinding = true;
+      path.stop();
+    }
+  },
+  "TypeAnnotation|TSTypeAnnotation|TypeParameterDeclaration|TSTypeParameterDeclaration": path => path.skip()
+};
+function collectShadowedParamsNames(param, functionScope, shadowedParams) {
+  for (const name of Object.keys(param.getBindingIdentifiers())) {
+    const constantViolations = functionScope.bindings[name]?.constantViolations;
+    if (constantViolations) {
+      for (const redeclarator of constantViolations) {
+        const node = redeclarator.node;
+        switch (node.type) {
+          case "VariableDeclarator":
+            {
+              if (node.init === null) {
+                const declaration = redeclarator.parentPath;
+                if (!declaration.parentPath.isFor() || declaration.parentPath.get("body") === declaration) {
+                  redeclarator.remove();
+                  break;
+                }
+              }
+              shadowedParams.add(name);
+              break;
+            }
+          case "FunctionDeclaration":
+            shadowedParams.add(name);
+            break;
+        }
+      }
+    }
   }
-});
-exports.default = void 0;
-var _helperPluginUtils = require("@babel/helper-plugin-utils");
-var _params = require("./params");
-var _rest = require("./rest");
-var _default = (0, _helperPluginUtils.declare)((api, options) => {
-  var _api$assumption, _api$assumption2;
+}
+function buildScopeIIFE(shadowedParams, body) {
+  const args = [];
+  const params = [];
+  for (const name of shadowedParams) {
+    args.push(types.identifier(name));
+    params.push(types.identifier(name));
+  }
+  return types.returnStatement(types.callExpression(types.arrowFunctionExpression(params, body), args));
+}
+
+const buildDefaultParam = template.statement(`
+  let VARIABLE_NAME =
+    arguments.length > ARGUMENT_KEY && arguments[ARGUMENT_KEY] !== undefined ?
+      arguments[ARGUMENT_KEY]
+    :
+      DEFAULT_VALUE;
+`);
+const buildLooseDefaultParam = template.statement(`
+  if (ASSIGNMENT_IDENTIFIER === UNDEFINED) {
+    ASSIGNMENT_IDENTIFIER = DEFAULT_VALUE;
+  }
+`);
+const buildLooseDestructuredDefaultParam = template.statement(`
+  let ASSIGNMENT_IDENTIFIER = PARAMETER_NAME === UNDEFINED ? DEFAULT_VALUE : PARAMETER_NAME ;
+`);
+const buildSafeArgumentsAccess = template.statement(`
+  let $0 = arguments.length > $1 ? arguments[$1] : undefined;
+`);
+function convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement) {
+  const params = path.get("params");
+  const isSimpleParameterList = params.every(param => param.isIdentifier());
+  if (isSimpleParameterList) return false;
+  const {
+    node,
+    scope
+  } = path;
+  const body = [];
+  const shadowedParams = new Set();
+  for (const param of params) {
+    collectShadowedParamsNames(param, scope, shadowedParams);
+  }
+  const state = {
+    needsOuterBinding: false,
+    scope
+  };
+  if (shadowedParams.size === 0) {
+    for (const param of params) {
+      if (!param.isIdentifier()) param.traverse(iifeVisitor, state);
+      if (state.needsOuterBinding) break;
+    }
+  }
+  let firstOptionalIndex = null;
+  for (let i = 0; i < params.length; i++) {
+    const param = params[i];
+    if (shouldTransformParam && !shouldTransformParam(i)) {
+      continue;
+    }
+    const transformedRestNodes = [];
+    if (replaceRestElement) {
+      replaceRestElement(path, param, transformedRestNodes);
+    }
+    const paramIsAssignmentPattern = param.isAssignmentPattern();
+    if (paramIsAssignmentPattern && (ignoreFunctionLength || types.isMethod(node, {
+      kind: "set"
+    }))) {
+      const left = param.get("left");
+      const right = param.get("right");
+      const undefinedNode = scope.buildUndefinedNode();
+      if (left.isIdentifier()) {
+        body.push(buildLooseDefaultParam({
+          ASSIGNMENT_IDENTIFIER: types.cloneNode(left.node),
+          DEFAULT_VALUE: right.node,
+          UNDEFINED: undefinedNode
+        }));
+        param.replaceWith(left.node);
+      } else if (left.isObjectPattern() || left.isArrayPattern()) {
+        const paramName = scope.generateUidIdentifier();
+        body.push(buildLooseDestructuredDefaultParam({
+          ASSIGNMENT_IDENTIFIER: left.node,
+          DEFAULT_VALUE: right.node,
+          PARAMETER_NAME: types.cloneNode(paramName),
+          UNDEFINED: undefinedNode
+        }));
+        param.replaceWith(paramName);
+      }
+    } else if (paramIsAssignmentPattern) {
+      if (firstOptionalIndex === null) firstOptionalIndex = i;
+      const left = param.get("left");
+      const right = param.get("right");
+      const defNode = buildDefaultParam({
+        VARIABLE_NAME: left.node,
+        DEFAULT_VALUE: right.node,
+        ARGUMENT_KEY: types.numericLiteral(i)
+      });
+      body.push(defNode);
+    } else if (firstOptionalIndex !== null) {
+      const defNode = buildSafeArgumentsAccess([param.node, types.numericLiteral(i)]);
+      body.push(defNode);
+    } else if (param.isObjectPattern() || param.isArrayPattern()) {
+      const uid = path.scope.generateUidIdentifier("ref");
+      uid.typeAnnotation = param.node.typeAnnotation;
+      const defNode = types.variableDeclaration("let", [types.variableDeclarator(param.node, uid)]);
+      body.push(defNode);
+      param.replaceWith(types.cloneNode(uid));
+    }
+    if (transformedRestNodes) {
+      for (const transformedNode of transformedRestNodes) {
+        body.push(transformedNode);
+      }
+    }
+  }
+  if (firstOptionalIndex !== null) {
+    node.params = node.params.slice(0, firstOptionalIndex);
+  }
+  path.ensureBlock();
+  const {
+    async,
+    generator
+  } = node;
+  if (generator || state.needsOuterBinding || shadowedParams.size > 0) {
+    body.push(buildScopeIIFE(shadowedParams, path.node.body));
+    path.set("body", types.blockStatement(body));
+    const bodyPath = path.get("body.body");
+    const arrowPath = bodyPath[bodyPath.length - 1].get("argument.callee");
+    arrowPath.arrowFunctionToExpression();
+    arrowPath.node.generator = generator;
+    arrowPath.node.async = async;
+    node.generator = false;
+    node.async = false;
+    if (async) {
+      path.node.body = template.statement.ast`{
+        try {
+          ${path.node.body.body}
+        } catch (e) {
+          return Promise.reject(e);
+        }
+      }`;
+    }
+  } else {
+    path.get("body").unshiftContainer("body", body);
+  }
+  return true;
+}
+
+const buildRest = template.statement(`
+  for (var LEN = ARGUMENTS.length,
+           ARRAY = new Array(ARRAY_LEN),
+           KEY = START;
+       KEY < LEN;
+       KEY++) {
+    ARRAY[ARRAY_KEY] = ARGUMENTS[KEY];
+  }
+`);
+const restIndex = template.expression(`
+  (INDEX < OFFSET || ARGUMENTS.length <= INDEX) ? undefined : ARGUMENTS[INDEX]
+`);
+const restIndexImpure = template.expression(`
+  REF = INDEX, (REF < OFFSET || ARGUMENTS.length <= REF) ? undefined : ARGUMENTS[REF]
+`);
+const restLength = template.expression(`
+  ARGUMENTS.length <= OFFSET ? 0 : ARGUMENTS.length - OFFSET
+`);
+function referencesRest(path, state) {
+  if (path.node.name === state.name) {
+    return path.scope.bindingIdentifierEquals(state.name, state.outerBinding);
+  }
+  return false;
+}
+const memberExpressionOptimisationVisitor = {
+  Scope(path, state) {
+    if (!path.scope.bindingIdentifierEquals(state.name, state.outerBinding)) {
+      path.skip();
+    }
+  },
+  Flow(path) {
+    if (path.isTypeCastExpression()) return;
+    path.skip();
+  },
+  Function(path, state) {
+    const oldNoOptimise = state.noOptimise;
+    state.noOptimise = true;
+    path.traverse(memberExpressionOptimisationVisitor, state);
+    state.noOptimise = oldNoOptimise;
+    path.skip();
+  },
+  ReferencedIdentifier(path, state) {
+    const {
+      node
+    } = path;
+    if (node.name === "arguments") {
+      state.deopted = true;
+    }
+    if (!referencesRest(path, state)) return;
+    if (state.noOptimise) {
+      state.deopted = true;
+    } else {
+      const {
+        parentPath
+      } = path;
+      if (parentPath.listKey === "params" && parentPath.key < state.offset) {
+        return;
+      }
+      if (parentPath.isMemberExpression({
+        object: node
+      })) {
+        const grandparentPath = parentPath.parentPath;
+        const argsOptEligible = !state.deopted && !(grandparentPath.isAssignmentExpression() && parentPath.node === grandparentPath.node.left || grandparentPath.isLVal() || grandparentPath.isForXStatement() || grandparentPath.isUpdateExpression() || grandparentPath.isUnaryExpression({
+          operator: "delete"
+        }) || (grandparentPath.isCallExpression() || grandparentPath.isNewExpression()) && parentPath.node === grandparentPath.node.callee);
+        if (argsOptEligible) {
+          if (parentPath.node.computed) {
+            if (parentPath.get("property").isBaseType("number")) {
+              state.candidates.push({
+                cause: "indexGetter",
+                path
+              });
+              return;
+            }
+          } else if (parentPath.node.property.name === "length") {
+            state.candidates.push({
+              cause: "lengthGetter",
+              path
+            });
+            return;
+          }
+        }
+      }
+      if (state.offset === 0 && parentPath.isSpreadElement()) {
+        const call = parentPath.parentPath;
+        if (call.isCallExpression() && call.node.arguments.length === 1) {
+          state.candidates.push({
+            cause: "argSpread",
+            path
+          });
+          return;
+        }
+      }
+      state.references.push(path);
+    }
+  },
+  BindingIdentifier(path, state) {
+    if (referencesRest(path, state)) {
+      state.deopted = true;
+    }
+  }
+};
+function getParamsCount(node) {
+  let count = node.params.length;
+  if (count > 0 && types.isIdentifier(node.params[0], {
+    name: "this"
+  })) {
+    count -= 1;
+  }
+  return count;
+}
+function hasRest(node) {
+  const length = node.params.length;
+  return length > 0 && types.isRestElement(node.params[length - 1]);
+}
+function optimiseIndexGetter(path, argsId, offset) {
+  const offsetLiteral = types.numericLiteral(offset);
+  let index;
+  const parent = path.parent;
+  if (types.isNumericLiteral(parent.property)) {
+    index = types.numericLiteral(parent.property.value + offset);
+  } else if (offset === 0) {
+    index = parent.property;
+  } else {
+    index = types.binaryExpression("+", parent.property, types.cloneNode(offsetLiteral));
+  }
+  const {
+    scope,
+    parentPath
+  } = path;
+  if (!scope.isPure(index)) {
+    const temp = scope.generateUidIdentifierBasedOnNode(index);
+    scope.push({
+      id: temp,
+      kind: "var"
+    });
+    parentPath.replaceWith(restIndexImpure({
+      ARGUMENTS: argsId,
+      OFFSET: offsetLiteral,
+      INDEX: index,
+      REF: types.cloneNode(temp)
+    }));
+  } else {
+    parentPath.replaceWith(restIndex({
+      ARGUMENTS: argsId,
+      OFFSET: offsetLiteral,
+      INDEX: index
+    }));
+    const replacedParentPath = parentPath;
+    const offsetTestPath = replacedParentPath.get("test");
+    const valRes = offsetTestPath.get("left").evaluate();
+    if (valRes.confident) {
+      if (valRes.value === true) {
+        replacedParentPath.replaceWith(scope.buildUndefinedNode());
+      } else {
+        offsetTestPath.replaceWith(offsetTestPath.get("right"));
+      }
+    }
+  }
+}
+function optimiseLengthGetter(path, argsId, offset) {
+  if (offset) {
+    path.parentPath.replaceWith(restLength({
+      ARGUMENTS: argsId,
+      OFFSET: types.numericLiteral(offset)
+    }));
+  } else {
+    path.replaceWith(argsId);
+  }
+}
+function convertFunctionRest(path) {
+  const {
+    node,
+    scope
+  } = path;
+  if (!hasRest(node)) return false;
+  const restPath = path.get(`params.${node.params.length - 1}.argument`);
+  if (!restPath.isIdentifier()) {
+    const shadowedParams = new Set();
+    collectShadowedParamsNames(restPath, path.scope, shadowedParams);
+    let needsIIFE = shadowedParams.size > 0;
+    if (!needsIIFE) {
+      const state = {
+        needsOuterBinding: false,
+        scope
+      };
+      restPath.traverse(iifeVisitor, state);
+      needsIIFE = state.needsOuterBinding;
+    }
+    if (needsIIFE) {
+      path.ensureBlock();
+      path.set("body", types.blockStatement([buildScopeIIFE(shadowedParams, path.node.body)]));
+    }
+  }
+  let rest = restPath.node;
+  node.params.pop();
+  if (types.isPattern(rest)) {
+    const pattern = rest;
+    rest = scope.generateUidIdentifier("ref");
+    const declar = types.variableDeclaration("let", [types.variableDeclarator(pattern, rest)]);
+    path.ensureBlock();
+    node.body.body.unshift(declar);
+  } else if (rest.name === "arguments") {
+    scope.rename(rest.name);
+  }
+  const argsId = types.identifier("arguments");
+  const paramsCount = getParamsCount(node);
+  const state = {
+    references: [],
+    offset: paramsCount,
+    argumentsNode: argsId,
+    outerBinding: scope.getBindingIdentifier(rest.name),
+    candidates: [],
+    name: rest.name,
+    deopted: false
+  };
+  path.traverse(memberExpressionOptimisationVisitor, state);
+  if (!state.deopted && !state.references.length) {
+    for (const {
+      path,
+      cause
+    } of state.candidates) {
+      const clonedArgsId = types.cloneNode(argsId);
+      switch (cause) {
+        case "indexGetter":
+          optimiseIndexGetter(path, clonedArgsId, state.offset);
+          break;
+        case "lengthGetter":
+          optimiseLengthGetter(path, clonedArgsId, state.offset);
+          break;
+        default:
+          path.replaceWith(clonedArgsId);
+      }
+    }
+    return true;
+  }
+  state.references.push(...state.candidates.map(({
+    path
+  }) => path));
+  const start = types.numericLiteral(paramsCount);
+  const key = scope.generateUidIdentifier("key");
+  const len = scope.generateUidIdentifier("len");
+  let arrKey, arrLen;
+  if (paramsCount) {
+    arrKey = types.binaryExpression("-", types.cloneNode(key), types.cloneNode(start));
+    arrLen = types.conditionalExpression(types.binaryExpression(">", types.cloneNode(len), types.cloneNode(start)), types.binaryExpression("-", types.cloneNode(len), types.cloneNode(start)), types.numericLiteral(0));
+  } else {
+    arrKey = types.identifier(key.name);
+    arrLen = types.identifier(len.name);
+  }
+  const loop = buildRest({
+    ARGUMENTS: argsId,
+    ARRAY_KEY: arrKey,
+    ARRAY_LEN: arrLen,
+    START: start,
+    ARRAY: rest,
+    KEY: key,
+    LEN: len
+  });
+  if (state.deopted) {
+    node.body.body.unshift(loop);
+  } else {
+    let target = path.getEarliestCommonAncestorFrom(state.references).getStatementParent();
+    target.findParent(path => {
+      if (path.isLoop()) {
+        target = path;
+      } else {
+        return path.isFunction();
+      }
+    });
+    target.insertBefore(loop);
+  }
+  return true;
+}
+
+var index = declare((api, options) => {
   api.assertVersion(7);
-  const ignoreFunctionLength = (_api$assumption = api.assumption("ignoreFunctionLength")) != null ? _api$assumption : options.loose;
-  const noNewArrows = (_api$assumption2 = api.assumption("noNewArrows")) != null ? _api$assumption2 : true;
+  const ignoreFunctionLength = api.assumption("ignoreFunctionLength") ?? options.loose;
+  const noNewArrows = api.assumption("noNewArrows") ?? true;
   return {
@@ -32,4 +481,4 @@ name: "transform-parameters",
         }
-        const convertedRest = (0, _rest.default)(path);
-        const convertedParams = (0, _params.default)(path, ignoreFunctionLength);
+        const convertedRest = convertFunctionRest(path);
+        const convertedParams = convertFunctionParams(path, ignoreFunctionLength);
         if (convertedRest || convertedParams) {
@@ -42,4 +491,4 @@ path.scope.crawl();
 });
-exports.default = _default;
 
+export { convertFunctionParams, index as default };
 //# sourceMappingURL=index.js.map

lib/params.js

@@ -1,10 +0,4 @@
-"use strict";
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.default = convertFunctionParams;
-var _core = require("@babel/core");
-var _shadowUtils = require("./shadow-utils");
-const buildDefaultParam = _core.template.statement(`
+import { template, types as t } from "@babel/core";
+import { iifeVisitor, collectShadowedParamsNames, buildScopeIIFE } from "./shadow-utils.js";
+const buildDefaultParam = template.statement(`
   let VARIABLE_NAME =
@@ -16,3 +10,3 @@ arguments.length > ARGUMENT_KEY && arguments[ARGUMENT_KEY] !== undefined ?
 `);
-const buildLooseDefaultParam = _core.template.statement(`
+const buildLooseDefaultParam = template.statement(`
   if (ASSIGNMENT_IDENTIFIER === UNDEFINED) {
@@ -22,9 +16,9 @@ ASSIGNMENT_IDENTIFIER = DEFAULT_VALUE;
 `);
-const buildLooseDestructuredDefaultParam = _core.template.statement(`
+const buildLooseDestructuredDefaultParam = template.statement(`
   let ASSIGNMENT_IDENTIFIER = PARAMETER_NAME === UNDEFINED ? DEFAULT_VALUE : PARAMETER_NAME ;
 `);
-const buildSafeArgumentsAccess = _core.template.statement(`
+const buildSafeArgumentsAccess = template.statement(`
   let $0 = arguments.length > $1 ? arguments[$1] : undefined;
 `);
-function convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement) {
+export default function convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement) {
   const params = path.get("params");
@@ -40,3 +34,3 @@ const isSimpleParameterList = params.every(param => param.isIdentifier());
   for (const param of params) {
-    (0, _shadowUtils.collectShadowedParamsNames)(param, scope, shadowedParams);
+    collectShadowedParamsNames(param, scope, shadowedParams);
   }
@@ -49,3 +43,3 @@ const state = {
     for (const param of params) {
-      if (!param.isIdentifier()) param.traverse(_shadowUtils.iifeVisitor, state);
+      if (!param.isIdentifier()) param.traverse(iifeVisitor, state);
       if (state.needsOuterBinding) break;
@@ -65,3 +59,3 @@ }
     const paramIsAssignmentPattern = param.isAssignmentPattern();
-    if (paramIsAssignmentPattern && (ignoreFunctionLength || _core.types.isMethod(node, {
+    if (paramIsAssignmentPattern && (ignoreFunctionLength || t.isMethod(node, {
       kind: "set"
@@ -74,3 +68,3 @@ }))) {
         body.push(buildLooseDefaultParam({
-          ASSIGNMENT_IDENTIFIER: _core.types.cloneNode(left.node),
+          ASSIGNMENT_IDENTIFIER: t.cloneNode(left.node),
           DEFAULT_VALUE: right.node,
@@ -85,3 +79,3 @@ UNDEFINED: undefinedNode
           DEFAULT_VALUE: right.node,
-          PARAMETER_NAME: _core.types.cloneNode(paramName),
+          PARAMETER_NAME: t.cloneNode(paramName),
           UNDEFINED: undefinedNode
@@ -98,7 +92,7 @@ }));
         DEFAULT_VALUE: right.node,
-        ARGUMENT_KEY: _core.types.numericLiteral(i)
+        ARGUMENT_KEY: t.numericLiteral(i)
       });
       body.push(defNode);
     } else if (firstOptionalIndex !== null) {
-      const defNode = buildSafeArgumentsAccess([param.node, _core.types.numericLiteral(i)]);
+      const defNode = buildSafeArgumentsAccess([param.node, t.numericLiteral(i)]);
       body.push(defNode);
@@ -108,5 +102,5 @@ } else if (param.isObjectPattern() || param.isArrayPattern()) {
       uid.typeAnnotation = param.node.typeAnnotation;
-      const defNode = _core.types.variableDeclaration("let", [_core.types.variableDeclarator(param.node, uid)]);
+      const defNode = t.variableDeclaration("let", [t.variableDeclarator(param.node, uid)]);
       body.push(defNode);
-      param.replaceWith(_core.types.cloneNode(uid));
+      param.replaceWith(t.cloneNode(uid));
     }
@@ -128,4 +122,4 @@ if (transformedRestNodes) {
   if (generator || state.needsOuterBinding || shadowedParams.size > 0) {
-    body.push((0, _shadowUtils.buildScopeIIFE)(shadowedParams, path.node.body));
-    path.set("body", _core.types.blockStatement(body));
+    body.push(buildScopeIIFE(shadowedParams, path.node.body));
+    path.set("body", t.blockStatement(body));
     const bodyPath = path.get("body.body");
@@ -139,3 +133,3 @@ const arrowPath = bodyPath[bodyPath.length - 1].get("argument.callee");
     if (async) {
-      path.node.body = _core.template.statement.ast`{
+      path.node.body = template.statement.ast`{
         try {
@@ -142,0 +136,0 @@ ${path.node.body.body}

lib/rest.js

@@ -1,10 +0,4 @@
-"use strict";
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.default = convertFunctionRest;
-var _core = require("@babel/core");
-var _shadowUtils = require("./shadow-utils");
-const buildRest = _core.template.statement(`
+import { template, types as t } from "@babel/core";
+import { iifeVisitor, collectShadowedParamsNames, buildScopeIIFE } from "./shadow-utils.js";
+const buildRest = template.statement(`
   for (var LEN = ARGUMENTS.length,
@@ -18,9 +12,9 @@ ARRAY = new Array(ARRAY_LEN),
 `);
-const restIndex = _core.template.expression(`
+const restIndex = template.expression(`
   (INDEX < OFFSET || ARGUMENTS.length <= INDEX) ? undefined : ARGUMENTS[INDEX]
 `);
-const restIndexImpure = _core.template.expression(`
+const restIndexImpure = template.expression(`
   REF = INDEX, (REF < OFFSET || ARGUMENTS.length <= REF) ? undefined : ARGUMENTS[REF]
 `);
-const restLength = _core.template.expression(`
+const restLength = template.expression(`
   ARGUMENTS.length <= OFFSET ? 0 : ARGUMENTS.length - OFFSET
@@ -114,3 +108,3 @@ `);
   let count = node.params.length;
-  if (count > 0 && _core.types.isIdentifier(node.params[0], {
+  if (count > 0 && t.isIdentifier(node.params[0], {
     name: "this"
@@ -124,14 +118,14 @@ })) {
   const length = node.params.length;
-  return length > 0 && _core.types.isRestElement(node.params[length - 1]);
+  return length > 0 && t.isRestElement(node.params[length - 1]);
 }
 function optimiseIndexGetter(path, argsId, offset) {
-  const offsetLiteral = _core.types.numericLiteral(offset);
+  const offsetLiteral = t.numericLiteral(offset);
   let index;
   const parent = path.parent;
-  if (_core.types.isNumericLiteral(parent.property)) {
-    index = _core.types.numericLiteral(parent.property.value + offset);
+  if (t.isNumericLiteral(parent.property)) {
+    index = t.numericLiteral(parent.property.value + offset);
   } else if (offset === 0) {
     index = parent.property;
   } else {
-    index = _core.types.binaryExpression("+", parent.property, _core.types.cloneNode(offsetLiteral));
+    index = t.binaryExpression("+", parent.property, t.cloneNode(offsetLiteral));
   }
@@ -152,3 +146,3 @@ const {
       INDEX: index,
-      REF: _core.types.cloneNode(temp)
+      REF: t.cloneNode(temp)
     }));
@@ -177,3 +171,3 @@ } else {
       ARGUMENTS: argsId,
-      OFFSET: _core.types.numericLiteral(offset)
+      OFFSET: t.numericLiteral(offset)
     }));
@@ -184,3 +178,3 @@ } else {
 }
-function convertFunctionRest(path) {
+export default function convertFunctionRest(path) {
   const {
@@ -194,3 +188,3 @@ node,
     const shadowedParams = new Set();
-    (0, _shadowUtils.collectShadowedParamsNames)(restPath, path.scope, shadowedParams);
+    collectShadowedParamsNames(restPath, path.scope, shadowedParams);
     let needsIIFE = shadowedParams.size > 0;
@@ -202,3 +196,3 @@ if (!needsIIFE) {
       };
-      restPath.traverse(_shadowUtils.iifeVisitor, state);
+      restPath.traverse(iifeVisitor, state);
       needsIIFE = state.needsOuterBinding;
@@ -208,3 +202,3 @@ }
       path.ensureBlock();
-      path.set("body", _core.types.blockStatement([(0, _shadowUtils.buildScopeIIFE)(shadowedParams, path.node.body)]));
+      path.set("body", t.blockStatement([buildScopeIIFE(shadowedParams, path.node.body)]));
     }
@@ -214,6 +208,6 @@ }
   node.params.pop();
-  if (_core.types.isPattern(rest)) {
+  if (t.isPattern(rest)) {
     const pattern = rest;
     rest = scope.generateUidIdentifier("ref");
-    const declar = _core.types.variableDeclaration("let", [_core.types.variableDeclarator(pattern, rest)]);
+    const declar = t.variableDeclaration("let", [t.variableDeclarator(pattern, rest)]);
     path.ensureBlock();
@@ -224,3 +218,3 @@ node.body.body.unshift(declar);
   }
-  const argsId = _core.types.identifier("arguments");
+  const argsId = t.identifier("arguments");
   const paramsCount = getParamsCount(node);
@@ -242,3 +236,3 @@ const state = {
     } of state.candidates) {
-      const clonedArgsId = _core.types.cloneNode(argsId);
+      const clonedArgsId = t.cloneNode(argsId);
       switch (cause) {
@@ -260,3 +254,3 @@ case "indexGetter":
   }) => path));
-  const start = _core.types.numericLiteral(paramsCount);
+  const start = t.numericLiteral(paramsCount);
   const key = scope.generateUidIdentifier("key");
@@ -266,7 +260,7 @@ const len = scope.generateUidIdentifier("len");
   if (paramsCount) {
-    arrKey = _core.types.binaryExpression("-", _core.types.cloneNode(key), _core.types.cloneNode(start));
-    arrLen = _core.types.conditionalExpression(_core.types.binaryExpression(">", _core.types.cloneNode(len), _core.types.cloneNode(start)), _core.types.binaryExpression("-", _core.types.cloneNode(len), _core.types.cloneNode(start)), _core.types.numericLiteral(0));
+    arrKey = t.binaryExpression("-", t.cloneNode(key), t.cloneNode(start));
+    arrLen = t.conditionalExpression(t.binaryExpression(">", t.cloneNode(len), t.cloneNode(start)), t.binaryExpression("-", t.cloneNode(len), t.cloneNode(start)), t.numericLiteral(0));
   } else {
-    arrKey = _core.types.identifier(key.name);
-    arrLen = _core.types.identifier(len.name);
+    arrKey = t.identifier(key.name);
+    arrLen = t.identifier(len.name);
   }
@@ -273,0 +267,0 @@ const loop = buildRest({

lib/shadow-utils.js

@@ -1,11 +0,3 @@
-"use strict";
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.buildScopeIIFE = buildScopeIIFE;
-exports.collectShadowedParamsNames = collectShadowedParamsNames;
-exports.iifeVisitor = void 0;
-var _core = require("@babel/core");
-const iifeVisitor = {
+import { types as t } from "@babel/core";
+export const iifeVisitor = {
   "ReferencedIdentifier|BindingIdentifier"(path, state) {
@@ -26,7 +18,5 @@ const {
 };
-exports.iifeVisitor = iifeVisitor;
-function collectShadowedParamsNames(param, functionScope, shadowedParams) {
+export function collectShadowedParamsNames(param, functionScope, shadowedParams) {
   for (const name of Object.keys(param.getBindingIdentifiers())) {
-    var _functionScope$bindin;
-    const constantViolations = (_functionScope$bindin = functionScope.bindings[name]) == null ? void 0 : _functionScope$bindin.constantViolations;
+    const constantViolations = functionScope.bindings[name]?.constantViolations;
     if (constantViolations) {
@@ -56,12 +46,12 @@ for (const redeclarator of constantViolations) {
 }
-function buildScopeIIFE(shadowedParams, body) {
+export function buildScopeIIFE(shadowedParams, body) {
   const args = [];
   const params = [];
   for (const name of shadowedParams) {
-    args.push(_core.types.identifier(name));
-    params.push(_core.types.identifier(name));
+    args.push(t.identifier(name));
+    params.push(t.identifier(name));
   }
-  return _core.types.returnStatement(_core.types.callExpression(_core.types.arrowFunctionExpression(params, body), args));
+  return t.returnStatement(t.callExpression(t.arrowFunctionExpression(params, body), args));
 }
 
 //# sourceMappingURL=shadow-utils.js.map

package.json

 {
   "name": "@babel/plugin-transform-parameters",
-  "version": "7.22.5",
+  "version": "8.0.0-alpha.0",
   "description": "Compile ES2015 default and rest parameters to ES5",
@@ -17,3 +17,3 @@ "repository": {
   "dependencies": {
-    "@babel/helper-plugin-utils": "^7.22.5"
+    "@babel/helper-plugin-utils": "^8.0.0-alpha.0"
   },
@@ -24,13 +24,17 @@ "keywords": [
   "peerDependencies": {
-    "@babel/core": "^7.0.0-0"
+    "@babel/core": "^8.0.0-alpha.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.22.5",
-    "@babel/helper-plugin-test-runner": "^7.22.5"
+    "@babel/core": "^8.0.0-alpha.0",
+    "@babel/helper-plugin-test-runner": "^8.0.0-alpha.0"
   },
   "engines": {
-    "node": ">=6.9.0"
+    "node": "^16.20.0 || ^18.16.0 || >=20.0.0"
   },
   "author": "The Babel Team (https://babel.dev/team)",
-  "type": "commonjs"
+  "exports": {
+    ".": "./lib/index.js",
+    "./package.json": "./package.json"
+  },
+  "type": "module"
 }

README.md

@@ -5,3 +5,3 @@ # @babel/plugin-transform-parameters
 
-See our website [@babel/plugin-transform-parameters](https://babeljs.io/docs/en/babel-plugin-transform-parameters) for more information.
+See our website [@babel/plugin-transform-parameters](https://babeljs.io/docs/babel-plugin-transform-parameters) for more information.
 
@@ -8,0 +8,0 @@ ## Install

New alerts

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

120802

increased by86.17%

Lines of code

956

increased by81.06%

Is type module

Yes

Worsened metrics

Number of low quality alerts

2

increased by100%

Dependency changes

• + Added@babel/code-frame@8.0.0-alpha.8(transitive)

• + Added@babel/compat-data@8.0.0-alpha.8(transitive)

• + Added@babel/core@8.0.0-alpha.8(transitive)

• + Added@babel/generator@8.0.0-alpha.8(transitive)

• + Added@babel/helper-compilation-targets@8.0.0-alpha.8(transitive)

• + Added@babel/helper-environment-visitor@8.0.0-alpha.8(transitive)

• + Added@babel/helper-function-name@8.0.0-alpha.8(transitive)

• + Added@babel/helper-hoist-variables@8.0.0-alpha.8(transitive)

• + Added@babel/helper-module-imports@8.0.0-alpha.8(transitive)

• + Added@babel/helper-module-transforms@8.0.0-alpha.8(transitive)

• + Added@babel/helper-plugin-utils@8.0.0-alpha.8(transitive)

• + Added@babel/helper-simple-access@8.0.0-alpha.8(transitive)

• + Added@babel/helper-split-export-declaration@8.0.0-alpha.8(transitive)

• + Added@babel/helper-string-parser@8.0.0-alpha.8(transitive)

• + Added@babel/helper-validator-identifier@8.0.0-alpha.8(transitive)

• + Added@babel/helper-validator-option@8.0.0-alpha.8(transitive)

• + Added@babel/helpers@8.0.0-alpha.8(transitive)

• + Added@babel/highlight@8.0.0-alpha.8(transitive)

• + Added@babel/parser@8.0.0-alpha.8(transitive)

• + Added@babel/template@8.0.0-alpha.8(transitive)

• + Added@babel/traverse@8.0.0-alpha.8(transitive)

• + Added@babel/types@8.0.0-alpha.8(transitive)

• + Addedelectron-to-chromium@1.4.763(transitive)

• + Addedglobals@13.24.0(transitive)

• + Addedjs-tokens@8.0.3(transitive)

• + Addedjsesc@3.0.2(transitive)

• + Addedlru-cache@7.18.3(transitive)

• + Addedsemver@7.6.2(transitive)

• + Addedto-fast-properties@3.0.1(transitive)

• + Addedtype-fest@0.20.2(transitive)

• - Removed@babel/code-frame@7.24.2(transitive)

• - Removed@babel/compat-data@7.24.4(transitive)

• - Removed@babel/core@7.24.5(transitive)

• - Removed@babel/generator@7.24.5(transitive)

• - Removed@babel/helper-compilation-targets@7.23.6(transitive)

• - Removed@babel/helper-environment-visitor@7.22.20(transitive)

• - Removed@babel/helper-function-name@7.23.0(transitive)

• - Removed@babel/helper-hoist-variables@7.22.5(transitive)

• - Removed@babel/helper-module-imports@7.24.3(transitive)

• - Removed@babel/helper-module-transforms@7.24.5(transitive)

• - Removed@babel/helper-plugin-utils@7.24.5(transitive)

• - Removed@babel/helper-simple-access@7.24.5(transitive)

• - Removed@babel/helper-split-export-declaration@7.24.5(transitive)

• - Removed@babel/helper-string-parser@7.24.1(transitive)

• - Removed@babel/helper-validator-identifier@7.24.5(transitive)

• - Removed@babel/helper-validator-option@7.23.5(transitive)

• - Removed@babel/helpers@7.24.5(transitive)

• - Removed@babel/highlight@7.24.5(transitive)

• - Removed@babel/parser@7.24.5(transitive)

• - Removed@babel/template@7.24.0(transitive)

• - Removed@babel/traverse@7.24.5(transitive)

• - Removed@babel/types@7.24.5(transitive)

• - Removedansi-styles@3.2.1(transitive)

• - Removedchalk@2.4.2(transitive)

• - Removedcolor-convert@1.9.3(transitive)

• - Removedcolor-name@1.1.3(transitive)

• - Removedelectron-to-chromium@1.4.762(transitive)

• - Removedescape-string-regexp@1.0.5(transitive)

• - Removedglobals@11.12.0(transitive)

• - Removedhas-flag@3.0.0(transitive)

• - Removedjs-tokens@4.0.0(transitive)

• - Removedjsesc@2.5.2(transitive)

• - Removedlru-cache@5.1.1(transitive)

• - Removedsemver@6.3.1(transitive)

• - Removedsupports-color@5.5.0(transitive)

• - Removedto-fast-properties@2.0.0(transitive)

• - Removedyallist@3.1.1(transitive)

• Updated@babel/helper-plugin-utils@^8.0.0-alpha.0