diff options
Diffstat (limited to 'node_modules/babel-plugin-transform-es2015-parameters/lib/rest.js')
| -rw-r--r-- | node_modules/babel-plugin-transform-es2015-parameters/lib/rest.js | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/node_modules/babel-plugin-transform-es2015-parameters/lib/rest.js b/node_modules/babel-plugin-transform-es2015-parameters/lib/rest.js deleted file mode 100644 index ef056dd..0000000 --- a/node_modules/babel-plugin-transform-es2015-parameters/lib/rest.js +++ /dev/null @@ -1,259 +0,0 @@ -"use strict"; - -exports.__esModule = true; -exports.visitor = undefined; - -var _getIterator2 = require("babel-runtime/core-js/get-iterator"); - -var _getIterator3 = _interopRequireDefault(_getIterator2); - -var _babelTemplate = require("babel-template"); - -var _babelTemplate2 = _interopRequireDefault(_babelTemplate); - -var _babelTypes = require("babel-types"); - -var t = _interopRequireWildcard(_babelTypes); - -function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } } - -function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } - -var buildRest = (0, _babelTemplate2.default)("\n for (var LEN = ARGUMENTS.length,\n ARRAY = Array(ARRAY_LEN),\n KEY = START;\n KEY < LEN;\n KEY++) {\n ARRAY[ARRAY_KEY] = ARGUMENTS[KEY];\n }\n"); - -var restIndex = (0, _babelTemplate2.default)("\n ARGUMENTS.length <= INDEX ? undefined : ARGUMENTS[INDEX]\n"); - -var restIndexImpure = (0, _babelTemplate2.default)("\n REF = INDEX, ARGUMENTS.length <= REF ? undefined : ARGUMENTS[REF]\n"); - -var restLength = (0, _babelTemplate2.default)("\n ARGUMENTS.length <= OFFSET ? 0 : ARGUMENTS.length - OFFSET\n"); - -var memberExpressionOptimisationVisitor = { - Scope: function Scope(path, state) { - if (!path.scope.bindingIdentifierEquals(state.name, state.outerBinding)) { - path.skip(); - } - }, - Flow: function Flow(path) { - if (path.isTypeCastExpression()) return; - - path.skip(); - }, - - - "Function|ClassProperty": function FunctionClassProperty(path, state) { - var oldNoOptimise = state.noOptimise; - state.noOptimise = true; - path.traverse(memberExpressionOptimisationVisitor, state); - state.noOptimise = oldNoOptimise; - - path.skip(); - }, - - ReferencedIdentifier: function ReferencedIdentifier(path, state) { - var node = path.node; - - if (node.name === "arguments") { - state.deopted = true; - } - - if (node.name !== state.name) return; - - if (state.noOptimise) { - state.deopted = true; - } else { - var parentPath = path.parentPath; - - if (parentPath.listKey === "params" && parentPath.key < state.offset) { - return; - } - - if (parentPath.isMemberExpression({ object: node })) { - var grandparentPath = parentPath.parentPath; - - var 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: path }); - return; - } - } else if (parentPath.node.property.name === "length") { - state.candidates.push({ cause: "lengthGetter", path: path }); - return; - } - } - } - - if (state.offset === 0 && parentPath.isSpreadElement()) { - var call = parentPath.parentPath; - if (call.isCallExpression() && call.node.arguments.length === 1) { - state.candidates.push({ cause: "argSpread", path: path }); - return; - } - } - - state.references.push(path); - } - }, - BindingIdentifier: function BindingIdentifier(_ref, state) { - var node = _ref.node; - - if (node.name === state.name) { - state.deopted = true; - } - } -}; -function hasRest(node) { - return t.isRestElement(node.params[node.params.length - 1]); -} - -function optimiseIndexGetter(path, argsId, offset) { - var index = void 0; - - if (t.isNumericLiteral(path.parent.property)) { - index = t.numericLiteral(path.parent.property.value + offset); - } else if (offset === 0) { - index = path.parent.property; - } else { - index = t.binaryExpression("+", path.parent.property, t.numericLiteral(offset)); - } - - var scope = path.scope; - - if (!scope.isPure(index)) { - var temp = scope.generateUidIdentifierBasedOnNode(index); - scope.push({ id: temp, kind: "var" }); - path.parentPath.replaceWith(restIndexImpure({ - ARGUMENTS: argsId, - INDEX: index, - REF: temp - })); - } else { - path.parentPath.replaceWith(restIndex({ - ARGUMENTS: argsId, - INDEX: index - })); - } -} - -function optimiseLengthGetter(path, argsId, offset) { - if (offset) { - path.parentPath.replaceWith(restLength({ - ARGUMENTS: argsId, - OFFSET: t.numericLiteral(offset) - })); - } else { - path.replaceWith(argsId); - } -} - -var visitor = exports.visitor = { - Function: function Function(path) { - var node = path.node, - scope = path.scope; - - if (!hasRest(node)) return; - - var rest = node.params.pop().argument; - - var argsId = t.identifier("arguments"); - - argsId._shadowedFunctionLiteral = path; - - var state = { - references: [], - offset: node.params.length, - - argumentsNode: argsId, - outerBinding: scope.getBindingIdentifier(rest.name), - - candidates: [], - - name: rest.name, - - deopted: false - }; - - path.traverse(memberExpressionOptimisationVisitor, state); - - if (!state.deopted && !state.references.length) { - for (var _iterator = state.candidates, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) { - var _ref3; - - if (_isArray) { - if (_i >= _iterator.length) break; - _ref3 = _iterator[_i++]; - } else { - _i = _iterator.next(); - if (_i.done) break; - _ref3 = _i.value; - } - - var _ref4 = _ref3; - var _path = _ref4.path, - cause = _ref4.cause; - - switch (cause) { - case "indexGetter": - optimiseIndexGetter(_path, argsId, state.offset); - break; - case "lengthGetter": - optimiseLengthGetter(_path, argsId, state.offset); - break; - default: - _path.replaceWith(argsId); - } - } - return; - } - - state.references = state.references.concat(state.candidates.map(function (_ref5) { - var path = _ref5.path; - return path; - })); - - state.deopted = state.deopted || !!node.shadow; - - var start = t.numericLiteral(node.params.length); - var key = scope.generateUidIdentifier("key"); - var len = scope.generateUidIdentifier("len"); - - var arrKey = key; - var arrLen = len; - if (node.params.length) { - arrKey = t.binaryExpression("-", key, start); - - arrLen = t.conditionalExpression(t.binaryExpression(">", len, start), t.binaryExpression("-", len, start), t.numericLiteral(0)); - } - - var loop = buildRest({ - ARGUMENTS: argsId, - ARRAY_KEY: arrKey, - ARRAY_LEN: arrLen, - START: start, - ARRAY: rest, - KEY: key, - LEN: len - }); - - if (state.deopted) { - loop._blockHoist = node.params.length + 1; - node.body.body.unshift(loop); - } else { - loop._blockHoist = 1; - - var target = path.getEarliestCommonAncestorFrom(state.references).getStatementParent(); - - target.findParent(function (path) { - if (path.isLoop()) { - target = path; - } else { - return path.isFunction(); - } - }); - - target.insertBefore(loop); - } - } -};
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