setup-python/node_modules/@babel/traverse/lib/context.js
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

152 lines
3.5 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _path = _interopRequireDefault(require("./path"));
function t() {
const data = _interopRequireWildcard(require("@babel/types"));
t = function () {
return data;
};
return data;
}
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)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const testing = process.env.NODE_ENV === "test";
class TraversalContext {
constructor(scope, opts, state, parentPath) {
this.queue = null;
this.parentPath = parentPath;
this.scope = scope;
this.state = state;
this.opts = opts;
}
shouldVisit(node) {
const opts = this.opts;
if (opts.enter || opts.exit) return true;
if (opts[node.type]) return true;
const keys = t().VISITOR_KEYS[node.type];
if (!keys || !keys.length) return false;
for (const key of keys) {
if (node[key]) return true;
}
return false;
}
create(node, obj, key, listKey) {
return _path.default.get({
parentPath: this.parentPath,
parent: node,
container: obj,
key: key,
listKey
});
}
maybeQueue(path, notPriority) {
if (this.trap) {
throw new Error("Infinite cycle detected");
}
if (this.queue) {
if (notPriority) {
this.queue.push(path);
} else {
this.priorityQueue.push(path);
}
}
}
visitMultiple(container, parent, listKey) {
if (container.length === 0) return false;
const queue = [];
for (let key = 0; key < container.length; key++) {
const node = container[key];
if (node && this.shouldVisit(node)) {
queue.push(this.create(parent, container, key, listKey));
}
}
return this.visitQueue(queue);
}
visitSingle(node, key) {
if (this.shouldVisit(node[key])) {
return this.visitQueue([this.create(node, node, key)]);
} else {
return false;
}
}
visitQueue(queue) {
this.queue = queue;
this.priorityQueue = [];
const visited = [];
let stop = false;
for (const path of queue) {
path.resync();
if (path.contexts.length === 0 || path.contexts[path.contexts.length - 1] !== this) {
path.pushContext(this);
}
if (path.key === null) continue;
if (testing && queue.length >= 10000) {
this.trap = true;
}
if (visited.indexOf(path.node) >= 0) continue;
visited.push(path.node);
if (path.visit()) {
stop = true;
break;
}
if (this.priorityQueue.length) {
stop = this.visitQueue(this.priorityQueue);
this.priorityQueue = [];
this.queue = queue;
if (stop) break;
}
}
for (const path of queue) {
path.popContext();
}
this.queue = null;
return stop;
}
visit(node, key) {
const nodes = node[key];
if (!nodes) return false;
if (Array.isArray(nodes)) {
return this.visitMultiple(nodes, node, key);
} else {
return this.visitSingle(node, key);
}
}
}
exports.default = TraversalContext;