index.js 5.9 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = void 0;
  6. var _helperPluginUtils = require("@babel/helper-plugin-utils");
  7. var _helperSkipTransparentExpressionWrappers = require("@babel/helper-skip-transparent-expression-wrappers");
  8. var _core = require("@babel/core");
  9. var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
  10. var _api$assumption, _options$allowArrayLi;
  11. api.assertVersion(7);
  12. const iterableIsArray = (_api$assumption = api.assumption("iterableIsArray")) != null ? _api$assumption : options.loose;
  13. const arrayLikeIsIterable = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable");
  14. function getSpreadLiteral(spread, scope) {
  15. if (iterableIsArray && !_core.types.isIdentifier(spread.argument, {
  16. name: "arguments"
  17. })) {
  18. return spread.argument;
  19. } else {
  20. const node = spread.argument;
  21. if (_core.types.isIdentifier(node)) {
  22. const binding = scope.getBinding(node.name);
  23. if (binding != null && binding.constant && binding.path.isGenericType("Array")) {
  24. return node;
  25. }
  26. }
  27. if (_core.types.isArrayExpression(node)) {
  28. return node;
  29. }
  30. if (_core.types.isIdentifier(node, {
  31. name: "arguments"
  32. })) {
  33. return _core.template.expression.ast`
  34. Array.prototype.slice.call(${node})
  35. `;
  36. }
  37. const args = [node];
  38. let helperName = "toConsumableArray";
  39. if (arrayLikeIsIterable) {
  40. args.unshift(scope.path.hub.addHelper(helperName));
  41. helperName = "maybeArrayLike";
  42. }
  43. return _core.types.callExpression(scope.path.hub.addHelper(helperName), args);
  44. }
  45. }
  46. function hasHole(spread) {
  47. return spread.elements.includes(null);
  48. }
  49. function hasSpread(nodes) {
  50. for (let i = 0; i < nodes.length; i++) {
  51. if (_core.types.isSpreadElement(nodes[i])) {
  52. return true;
  53. }
  54. }
  55. return false;
  56. }
  57. function push(_props, nodes) {
  58. if (!_props.length) return _props;
  59. nodes.push(_core.types.arrayExpression(_props));
  60. return [];
  61. }
  62. function build(props, scope, file) {
  63. const nodes = [];
  64. let _props = [];
  65. for (const prop of props) {
  66. if (_core.types.isSpreadElement(prop)) {
  67. _props = push(_props, nodes);
  68. let spreadLiteral = getSpreadLiteral(prop, scope);
  69. if (_core.types.isArrayExpression(spreadLiteral) && hasHole(spreadLiteral)) {
  70. spreadLiteral = _core.types.callExpression(file.addHelper("arrayWithoutHoles"), [spreadLiteral]);
  71. }
  72. nodes.push(spreadLiteral);
  73. } else {
  74. _props.push(prop);
  75. }
  76. }
  77. push(_props, nodes);
  78. return nodes;
  79. }
  80. return {
  81. name: "transform-spread",
  82. visitor: {
  83. ArrayExpression(path) {
  84. const {
  85. node,
  86. scope
  87. } = path;
  88. const elements = node.elements;
  89. if (!hasSpread(elements)) return;
  90. const nodes = build(elements, scope, this.file);
  91. let first = nodes[0];
  92. if (nodes.length === 1 && first !== elements[0].argument) {
  93. path.replaceWith(first);
  94. return;
  95. }
  96. if (!_core.types.isArrayExpression(first)) {
  97. first = _core.types.arrayExpression([]);
  98. } else {
  99. nodes.shift();
  100. }
  101. path.replaceWith(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes));
  102. },
  103. CallExpression(path) {
  104. const {
  105. node,
  106. scope
  107. } = path;
  108. const args = node.arguments;
  109. if (!hasSpread(args)) return;
  110. const calleePath = (0, _helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers)(path.get("callee"));
  111. if (calleePath.isSuper()) {
  112. 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.");
  113. }
  114. let contextLiteral = scope.buildUndefinedNode();
  115. node.arguments = [];
  116. let nodes;
  117. if (args.length === 1 && _core.types.isIdentifier(args[0].argument, {
  118. name: "arguments"
  119. })) {
  120. nodes = [args[0].argument];
  121. } else {
  122. nodes = build(args, scope, this.file);
  123. }
  124. const first = nodes.shift();
  125. if (nodes.length) {
  126. node.arguments.push(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes));
  127. } else {
  128. node.arguments.push(first);
  129. }
  130. const callee = calleePath.node;
  131. if (_core.types.isMemberExpression(callee)) {
  132. const temp = scope.maybeGenerateMemoised(callee.object);
  133. if (temp) {
  134. callee.object = _core.types.assignmentExpression("=", temp, callee.object);
  135. contextLiteral = temp;
  136. } else {
  137. contextLiteral = _core.types.cloneNode(callee.object);
  138. }
  139. }
  140. node.callee = _core.types.memberExpression(node.callee, _core.types.identifier("apply"));
  141. if (_core.types.isSuper(contextLiteral)) {
  142. contextLiteral = _core.types.thisExpression();
  143. }
  144. node.arguments.unshift(_core.types.cloneNode(contextLiteral));
  145. },
  146. NewExpression(path) {
  147. const {
  148. node,
  149. scope
  150. } = path;
  151. if (!hasSpread(node.arguments)) return;
  152. const nodes = build(node.arguments, scope, this.file);
  153. const first = nodes.shift();
  154. let args;
  155. if (nodes.length) {
  156. args = _core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes);
  157. } else {
  158. args = first;
  159. }
  160. path.replaceWith(_core.types.callExpression(path.hub.addHelper("construct"), [node.callee, args]));
  161. }
  162. }
  163. };
  164. });
  165. //# sourceMappingURL=index.js.map