89 lines
3.6 KiB
JavaScript
89 lines
3.6 KiB
JavaScript
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"use strict";
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exports.__esModule = true;
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exports.default = function (path, helpers) {
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var node = path.node,
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scope = path.scope,
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parent = path.parent;
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var stepKey = scope.generateUidIdentifier("step");
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var stepValue = scope.generateUidIdentifier("value");
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var left = node.left;
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var declar = void 0;
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if (t.isIdentifier(left) || t.isPattern(left) || t.isMemberExpression(left)) {
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declar = t.expressionStatement(t.assignmentExpression("=", left, stepValue));
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} else if (t.isVariableDeclaration(left)) {
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declar = t.variableDeclaration(left.kind, [t.variableDeclarator(left.declarations[0].id, stepValue)]);
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}
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var template = buildForAwait();
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(0, _babelTraverse2.default)(template, forAwaitVisitor, null, {
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ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
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ITERATOR_COMPLETION: scope.generateUidIdentifier("iteratorNormalCompletion"),
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ITERATOR_ERROR_KEY: scope.generateUidIdentifier("iteratorError"),
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ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
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GET_ITERATOR: helpers.getAsyncIterator,
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OBJECT: node.right,
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STEP_VALUE: stepValue,
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STEP_KEY: stepKey,
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AWAIT: helpers.wrapAwait
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});
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template = template.body.body;
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var isLabeledParent = t.isLabeledStatement(parent);
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var tryBody = template[3].block.body;
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var loop = tryBody[0];
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if (isLabeledParent) {
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tryBody[0] = t.labeledStatement(parent.label, loop);
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}
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return {
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replaceParent: isLabeledParent,
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node: template,
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declar: declar,
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loop: loop
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};
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};
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var _babelTypes = require("babel-types");
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var t = _interopRequireWildcard(_babelTypes);
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var _babelTemplate = require("babel-template");
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var _babelTemplate2 = _interopRequireDefault(_babelTemplate);
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var _babelTraverse = require("babel-traverse");
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var _babelTraverse2 = _interopRequireDefault(_babelTraverse);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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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; } }
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var buildForAwait = (0, _babelTemplate2.default)("\n function* wrapper() {\n var ITERATOR_COMPLETION = true;\n var ITERATOR_HAD_ERROR_KEY = false;\n var ITERATOR_ERROR_KEY = undefined;\n try {\n for (\n var ITERATOR_KEY = GET_ITERATOR(OBJECT), STEP_KEY, STEP_VALUE;\n (\n STEP_KEY = yield AWAIT(ITERATOR_KEY.next()),\n ITERATOR_COMPLETION = STEP_KEY.done,\n STEP_VALUE = yield AWAIT(STEP_KEY.value),\n !ITERATOR_COMPLETION\n );\n ITERATOR_COMPLETION = true) {\n }\n } catch (err) {\n ITERATOR_HAD_ERROR_KEY = true;\n ITERATOR_ERROR_KEY = err;\n } finally {\n try {\n if (!ITERATOR_COMPLETION && ITERATOR_KEY.return) {\n yield AWAIT(ITERATOR_KEY.return());\n }\n } finally {\n if (ITERATOR_HAD_ERROR_KEY) {\n throw ITERATOR_ERROR_KEY;\n }\n }\n }\n }\n");
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var forAwaitVisitor = {
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noScope: true,
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Identifier: function Identifier(path, replacements) {
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if (path.node.name in replacements) {
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path.replaceInline(replacements[path.node.name]);
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}
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},
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CallExpression: function CallExpression(path, replacements) {
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var callee = path.node.callee;
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if (t.isIdentifier(callee) && callee.name === "AWAIT" && !replacements.AWAIT) {
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path.replaceWith(path.node.arguments[0]);
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}
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}
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};
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module.exports = exports["default"];
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