123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179 |
- /**
- * Copyright (c) 2014-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
- import assert from "assert";
- import { Emitter } from "./emit";
- import { inherits } from "util";
- import { getTypes } from "./util";
- function Entry() {
- assert.ok(this instanceof Entry);
- }
- function FunctionEntry(returnLoc) {
- Entry.call(this);
- getTypes().assertLiteral(returnLoc);
- this.returnLoc = returnLoc;
- }
- inherits(FunctionEntry, Entry);
- exports.FunctionEntry = FunctionEntry;
- function LoopEntry(breakLoc, continueLoc, label) {
- Entry.call(this);
- const t = getTypes();
- t.assertLiteral(breakLoc);
- t.assertLiteral(continueLoc);
- if (label) {
- t.assertIdentifier(label);
- } else {
- label = null;
- }
- this.breakLoc = breakLoc;
- this.continueLoc = continueLoc;
- this.label = label;
- }
- inherits(LoopEntry, Entry);
- exports.LoopEntry = LoopEntry;
- function SwitchEntry(breakLoc) {
- Entry.call(this);
- getTypes().assertLiteral(breakLoc);
- this.breakLoc = breakLoc;
- }
- inherits(SwitchEntry, Entry);
- exports.SwitchEntry = SwitchEntry;
- function TryEntry(firstLoc, catchEntry, finallyEntry) {
- Entry.call(this);
- const t = getTypes();
- t.assertLiteral(firstLoc);
- if (catchEntry) {
- assert.ok(catchEntry instanceof CatchEntry);
- } else {
- catchEntry = null;
- }
- if (finallyEntry) {
- assert.ok(finallyEntry instanceof FinallyEntry);
- } else {
- finallyEntry = null;
- }
- // Have to have one or the other (or both).
- assert.ok(catchEntry || finallyEntry);
- this.firstLoc = firstLoc;
- this.catchEntry = catchEntry;
- this.finallyEntry = finallyEntry;
- }
- inherits(TryEntry, Entry);
- exports.TryEntry = TryEntry;
- function CatchEntry(firstLoc, paramId) {
- Entry.call(this);
- const t = getTypes();
- t.assertLiteral(firstLoc);
- t.assertIdentifier(paramId);
- this.firstLoc = firstLoc;
- this.paramId = paramId;
- }
- inherits(CatchEntry, Entry);
- exports.CatchEntry = CatchEntry;
- function FinallyEntry(firstLoc, afterLoc) {
- Entry.call(this);
- const t = getTypes();
- t.assertLiteral(firstLoc);
- t.assertLiteral(afterLoc);
- this.firstLoc = firstLoc;
- this.afterLoc = afterLoc;
- }
- inherits(FinallyEntry, Entry);
- exports.FinallyEntry = FinallyEntry;
- function LabeledEntry(breakLoc, label) {
- Entry.call(this);
- const t = getTypes();
- t.assertLiteral(breakLoc);
- t.assertIdentifier(label);
- this.breakLoc = breakLoc;
- this.label = label;
- }
- inherits(LabeledEntry, Entry);
- exports.LabeledEntry = LabeledEntry;
- function LeapManager(emitter) {
- assert.ok(this instanceof LeapManager);
- assert.ok(emitter instanceof Emitter);
- this.emitter = emitter;
- this.entryStack = [new FunctionEntry(emitter.finalLoc)];
- }
- let LMp = LeapManager.prototype;
- exports.LeapManager = LeapManager;
- LMp.withEntry = function(entry, callback) {
- assert.ok(entry instanceof Entry);
- this.entryStack.push(entry);
- try {
- callback.call(this.emitter);
- } finally {
- let popped = this.entryStack.pop();
- assert.strictEqual(popped, entry);
- }
- };
- LMp._findLeapLocation = function(property, label) {
- for (let i = this.entryStack.length - 1; i >= 0; --i) {
- let entry = this.entryStack[i];
- let loc = entry[property];
- if (loc) {
- if (label) {
- if (entry.label &&
- entry.label.name === label.name) {
- return loc;
- }
- } else if (entry instanceof LabeledEntry) {
- // Ignore LabeledEntry entries unless we are actually breaking to
- // a label.
- } else {
- return loc;
- }
- }
- }
- return null;
- };
- LMp.getBreakLoc = function(label) {
- return this._findLeapLocation("breakLoc", label);
- };
- LMp.getContinueLoc = function(label) {
- return this._findLeapLocation("continueLoc", label);
- };
|