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Name	Size	Last Modified	Actions
[F]index.js Edit	7.37 KB	2022-10-08 17:28:28
[F]no-helper-implementation.js Edit	4.82 KB	2022-10-08 17:28:28

Editing: index.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _helperPluginUtils = require("@babel/helper-plugin-utils");

var _core = require("@babel/core");

var _noHelperImplementation = require("./no-helper-implementation");

function buildLoopBody(path, declar, newBody) {
  let block;
  const bodyPath = path.get("body");
  const body = newBody != null ? newBody : bodyPath.node;

if (_core.types.isBlockStatement(body) && Object.keys(path.getBindingIdentifiers()).some(id => bodyPath.scope.hasOwnBinding(id))) {
    block = _core.types.blockStatement([declar, body]);
  } else {
    block = _core.types.toBlock(body);
    block.body.unshift(declar);
  }

return block;
}

var _default = (0, _helperPluginUtils.declare)((api, options) => {
  var _options$assumeArray, _options$allowArrayLi, _api$assumption;

api.assertVersion(7);
  {
    const {
      assumeArray,
      allowArrayLike,
      loose
    } = options;

if (loose === true && assumeArray === true) {
      throw new Error(`The loose and assumeArray options cannot be used together in @babel/plugin-transform-for-of`);
    }

if (assumeArray === true && allowArrayLike === true) {
      throw new Error(`The assumeArray and allowArrayLike options cannot be used together in @babel/plugin-transform-for-of`);
    }

if (allowArrayLike && /^7\.\d\./.test(api.version)) {
      throw new Error(`The allowArrayLike is only supported when using @babel/core@^7.10.0`);
    }
  }
  const iterableIsArray = (_options$assumeArray = options.assumeArray) != null ? _options$assumeArray : !options.loose && api.assumption("iterableIsArray");
  const arrayLikeIsIterable = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable");
  const skipteratorClosing = (_api$assumption = api.assumption("skipForOfIteratorClosing")) != null ? _api$assumption : options.loose;

if (iterableIsArray && arrayLikeIsIterable) {
    throw new Error(`The "iterableIsArray" and "arrayLikeIsIterable" assumptions are not compatible.`);
  }

if (iterableIsArray) {
    return {
      name: "transform-for-of",
      visitor: {
        ForOfStatement(path) {
          const {
            scope
          } = path;
          const {
            left,
            right,
            await: isAwait
          } = path.node;

if (isAwait) {
            return;
          }

const i = scope.generateUidIdentifier("i");
          let array = scope.maybeGenerateMemoised(right, true);
          const inits = [_core.types.variableDeclarator(i, _core.types.numericLiteral(0))];

if (array) {
            inits.push(_core.types.variableDeclarator(array, right));
          } else {
            array = right;
          }

const item = _core.types.memberExpression(_core.types.cloneNode(array), _core.types.cloneNode(i), true);

let assignment;

if (_core.types.isVariableDeclaration(left)) {
            assignment = left;
            assignment.declarations[0].init = item;
          } else {
            assignment = _core.types.expressionStatement(_core.types.assignmentExpression("=", left, item));
          }

path.replaceWith(_core.types.forStatement(_core.types.variableDeclaration("let", inits), _core.types.binaryExpression("<", _core.types.cloneNode(i), _core.types.memberExpression(_core.types.cloneNode(array), _core.types.identifier("length"))), _core.types.updateExpression("++", _core.types.cloneNode(i)), buildLoopBody(path, assignment)));
        }

}
    };
  }

function _ForOfStatementArray(path) {
    const {
      node,
      scope
    } = path;
    const right = scope.generateUidIdentifierBasedOnNode(node.right, "arr");
    const iterationKey = scope.generateUidIdentifier("i");
    const loop = buildForOfArray({
      BODY: node.body,
      KEY: iterationKey,
      NAME: right,
      ARR: node.right
    });

_core.types.inherits(loop, node);

const iterationValue = _core.types.memberExpression(_core.types.cloneNode(right), _core.types.cloneNode(iterationKey), true);

let declar;
    const left = node.left;

if (_core.types.isVariableDeclaration(left)) {
      left.declarations[0].init = iterationValue;
      declar = left;
    } else {
      declar = _core.types.expressionStatement(_core.types.assignmentExpression("=", left, iterationValue));
    }

loop.body = buildLoopBody(path, declar, loop.body);
    return loop;
  }

return {
    name: "transform-for-of",
    visitor: {
      ForOfStatement(path, state) {
        const right = path.get("right");

if (right.isArrayExpression() || right.isGenericType("Array") || _core.types.isArrayTypeAnnotation(right.getTypeAnnotation())) {
          path.replaceWith(_ForOfStatementArray(path));
          return;
        }

if (!state.availableHelper(builder.helper)) {
          (0, _noHelperImplementation.default)(skipteratorClosing, path, state);
          return;
        }

const {
          node,
          parent,
          scope
        } = path;
        const left = node.left;
        let declar;
        const stepKey = scope.generateUid("step");

const stepValue = _core.types.memberExpression(_core.types.identifier(stepKey), _core.types.identifier("value"));

if (_core.types.isVariableDeclaration(left)) {
          declar = _core.types.variableDeclaration(left.kind, [_core.types.variableDeclarator(left.declarations[0].id, stepValue)]);
        } else {
          declar = _core.types.expressionStatement(_core.types.assignmentExpression("=", left, stepValue));
        }

const nodes = builder.build({
          CREATE_ITERATOR_HELPER: state.addHelper(builder.helper),
          ITERATOR_HELPER: scope.generateUidIdentifier("iterator"),
          ARRAY_LIKE_IS_ITERABLE: arrayLikeIsIterable ? _core.types.booleanLiteral(true) : null,
          STEP_KEY: _core.types.identifier(stepKey),
          OBJECT: node.right,
          BODY: buildLoopBody(path, declar)
        });
        const container = builder.getContainer(nodes);

_core.types.inherits(container[0], node);

_core.types.inherits(container[0].body, node.body);

if (_core.types.isLabeledStatement(parent)) {
          container[0] = _core.types.labeledStatement(parent.label, container[0]);
          path.parentPath.replaceWithMultiple(nodes);
          path.skip();
        } else {
          path.replaceWithMultiple(nodes);
        }
      }

}
  };
});

exports.default = _default;

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