hexo/node_modules/regenerator-transform/lib/leap.js

143 lines
4.0 KiB
JavaScript

"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _assert = _interopRequireDefault(require("assert"));
var _emit = require("./emit");
var _util = require("util");
var _util2 = require("./util");
/**
* 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.
*/
function Entry() {
_assert["default"].ok(this instanceof Entry);
}
function FunctionEntry(returnLoc) {
Entry.call(this);
(0, _util2.getTypes)().assertLiteral(returnLoc);
this.returnLoc = returnLoc;
}
(0, _util.inherits)(FunctionEntry, Entry);
exports.FunctionEntry = FunctionEntry;
function LoopEntry(breakLoc, continueLoc, label) {
Entry.call(this);
var t = (0, _util2.getTypes)();
t.assertLiteral(breakLoc);
t.assertLiteral(continueLoc);
if (label) {
t.assertIdentifier(label);
} else {
label = null;
}
this.breakLoc = breakLoc;
this.continueLoc = continueLoc;
this.label = label;
}
(0, _util.inherits)(LoopEntry, Entry);
exports.LoopEntry = LoopEntry;
function SwitchEntry(breakLoc) {
Entry.call(this);
(0, _util2.getTypes)().assertLiteral(breakLoc);
this.breakLoc = breakLoc;
}
(0, _util.inherits)(SwitchEntry, Entry);
exports.SwitchEntry = SwitchEntry;
function TryEntry(firstLoc, catchEntry, finallyEntry) {
Entry.call(this);
var t = (0, _util2.getTypes)();
t.assertLiteral(firstLoc);
if (catchEntry) {
_assert["default"].ok(catchEntry instanceof CatchEntry);
} else {
catchEntry = null;
}
if (finallyEntry) {
_assert["default"].ok(finallyEntry instanceof FinallyEntry);
} else {
finallyEntry = null;
}
// Have to have one or the other (or both).
_assert["default"].ok(catchEntry || finallyEntry);
this.firstLoc = firstLoc;
this.catchEntry = catchEntry;
this.finallyEntry = finallyEntry;
}
(0, _util.inherits)(TryEntry, Entry);
exports.TryEntry = TryEntry;
function CatchEntry(firstLoc, paramId) {
Entry.call(this);
var t = (0, _util2.getTypes)();
t.assertLiteral(firstLoc);
t.assertIdentifier(paramId);
this.firstLoc = firstLoc;
this.paramId = paramId;
}
(0, _util.inherits)(CatchEntry, Entry);
exports.CatchEntry = CatchEntry;
function FinallyEntry(firstLoc, afterLoc) {
Entry.call(this);
var t = (0, _util2.getTypes)();
t.assertLiteral(firstLoc);
t.assertLiteral(afterLoc);
this.firstLoc = firstLoc;
this.afterLoc = afterLoc;
}
(0, _util.inherits)(FinallyEntry, Entry);
exports.FinallyEntry = FinallyEntry;
function LabeledEntry(breakLoc, label) {
Entry.call(this);
var t = (0, _util2.getTypes)();
t.assertLiteral(breakLoc);
t.assertIdentifier(label);
this.breakLoc = breakLoc;
this.label = label;
}
(0, _util.inherits)(LabeledEntry, Entry);
exports.LabeledEntry = LabeledEntry;
function LeapManager(emitter) {
_assert["default"].ok(this instanceof LeapManager);
_assert["default"].ok(emitter instanceof _emit.Emitter);
this.emitter = emitter;
this.entryStack = [new FunctionEntry(emitter.finalLoc)];
}
var LMp = LeapManager.prototype;
exports.LeapManager = LeapManager;
LMp.withEntry = function (entry, callback) {
_assert["default"].ok(entry instanceof Entry);
this.entryStack.push(entry);
try {
callback.call(this.emitter);
} finally {
var popped = this.entryStack.pop();
_assert["default"].strictEqual(popped, entry);
}
};
LMp._findLeapLocation = function (property, label) {
for (var i = this.entryStack.length - 1; i >= 0; --i) {
var entry = this.entryStack[i];
var 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);
};