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index.js 5.16 KiB
"use strict";
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _helperSkipTransparentExpressionWrappers = require("@babel/helper-skip-transparent-expression-wrappers");
var _core = require("@babel/core");
var _default = (0, _helperPluginUtils.declare)((api, options) => {
  var _api$assumption, _options$allowArrayLi;
  api.assertVersion(7);
  const iterableIsArray = (_api$assumption = api.assumption("iterableIsArray")) != null ? _api$assumption : options.loose;
  const arrayLikeIsIterable = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable");
  function getSpreadLiteral(spread, scope) {
    if (iterableIsArray && !_core.types.isIdentifier(spread.argument, {
      name: "arguments"
    })) {
      return spread.argument;
    } else {
      return scope.toArray(spread.argument, true, arrayLikeIsIterable);
  function hasHole(spread) {
    return spread.elements.some(el => el === null);
  function hasSpread(nodes) {
    for (let i = 0; i < nodes.length; i++) {
      if (_core.types.isSpreadElement(nodes[i])) {
        return true;
    return false;
  function push(_props, nodes) {
    if (!_props.length) return _props;
    nodes.push(_core.types.arrayExpression(_props));
    return [];
  function build(props, scope, file) {
    const nodes = [];
    let _props = [];
    for (const prop of props) {
      if (_core.types.isSpreadElement(prop)) {
        _props = push(_props, nodes);
        let spreadLiteral = getSpreadLiteral(prop, scope);
        if (_core.types.isArrayExpression(spreadLiteral) && hasHole(spreadLiteral)) {
          spreadLiteral = _core.types.callExpression(file.addHelper("arrayWithoutHoles"), [spreadLiteral]);
        nodes.push(spreadLiteral);
      } else {
        _props.push(prop);
    push(_props, nodes);
return nodes; } return { name: "transform-spread", visitor: { ArrayExpression(path) { const { node, scope } = path; const elements = node.elements; if (!hasSpread(elements)) return; const nodes = build(elements, scope, this.file); let first = nodes[0]; if (nodes.length === 1 && first !== elements[0].argument) { path.replaceWith(first); return; } if (!_core.types.isArrayExpression(first)) { first = _core.types.arrayExpression([]); } else { nodes.shift(); } path.replaceWith(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes)); }, CallExpression(path) { const { node, scope } = path; const args = node.arguments; if (!hasSpread(args)) return; const calleePath = (0, _helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers)(path.get("callee")); if (calleePath.isSuper()) { throw path.buildCodeFrameError("It's not possible to compile spread arguments in `super()` without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration."); } let contextLiteral = scope.buildUndefinedNode(); node.arguments = []; let nodes; if (args.length === 1 && _core.types.isIdentifier(args[0].argument, { name: "arguments" })) { nodes = [args[0].argument]; } else { nodes = build(args, scope, this.file); } const first = nodes.shift(); if (nodes.length) { node.arguments.push(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes)); } else { node.arguments.push(first); } const callee = calleePath.node; if (_core.types.isMemberExpression(callee)) { const temp = scope.maybeGenerateMemoised(callee.object); if (temp) { callee.object = _core.types.assignmentExpression("=", temp, callee.object);
contextLiteral = temp; } else { contextLiteral = _core.types.cloneNode(callee.object); } } node.callee = _core.types.memberExpression(node.callee, _core.types.identifier("apply")); if (_core.types.isSuper(contextLiteral)) { contextLiteral = _core.types.thisExpression(); } node.arguments.unshift(_core.types.cloneNode(contextLiteral)); }, NewExpression(path) { const { node, scope } = path; if (!hasSpread(node.arguments)) return; const nodes = build(node.arguments, scope, this.file); const first = nodes.shift(); let args; if (nodes.length) { args = _core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes); } else { args = first; } path.replaceWith(_core.types.callExpression(path.hub.addHelper("construct"), [node.callee, args])); } } }; }); exports.default = _default;