flow like the river

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

@@ -0,0 +1,183 @@
+"use strict";
+
+var _assert = require("assert");
+
+var _assert2 = _interopRequireDefault(_assert);
+
+var _babelTypes = require("babel-types");
+
+var t = _interopRequireWildcard(_babelTypes);
+
+var _util = require("util");
+
+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 }; }
+
+function Entry() {
+  _assert2.default.ok(this instanceof Entry);
+} /**
+   * Copyright (c) 2014, Facebook, Inc.
+   * All rights reserved.
+   *
+   * This source code is licensed under the BSD-style license found in the
+   * https://raw.github.com/facebook/regenerator/master/LICENSE file. An
+   * additional grant of patent rights can be found in the PATENTS file in
+   * the same directory.
+   */
+
+function FunctionEntry(returnLoc) {
+  Entry.call(this);
+  t.assertLiteral(returnLoc);
+  this.returnLoc = returnLoc;
+}
+
+(0, _util.inherits)(FunctionEntry, Entry);
+exports.FunctionEntry = FunctionEntry;
+
+function LoopEntry(breakLoc, continueLoc, label) {
+  Entry.call(this);
+
+  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);
+  t.assertLiteral(breakLoc);
+  this.breakLoc = breakLoc;
+}
+
+(0, _util.inherits)(SwitchEntry, Entry);
+exports.SwitchEntry = SwitchEntry;
+
+function TryEntry(firstLoc, catchEntry, finallyEntry) {
+  Entry.call(this);
+
+  t.assertLiteral(firstLoc);
+
+  if (catchEntry) {
+    _assert2.default.ok(catchEntry instanceof CatchEntry);
+  } else {
+    catchEntry = null;
+  }
+
+  if (finallyEntry) {
+    _assert2.default.ok(finallyEntry instanceof FinallyEntry);
+  } else {
+    finallyEntry = null;
+  }
+
+  // Have to have one or the other (or both).
+  _assert2.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);
+
+  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);
+  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);
+
+  t.assertLiteral(breakLoc);
+  t.assertIdentifier(label);
+
+  this.breakLoc = breakLoc;
+  this.label = label;
+}
+
+(0, _util.inherits)(LabeledEntry, Entry);
+exports.LabeledEntry = LabeledEntry;
+
+function LeapManager(emitter) {
+  _assert2.default.ok(this instanceof LeapManager);
+
+  var Emitter = require("./emit").Emitter;
+  _assert2.default.ok(emitter instanceof Emitter);
+
+  this.emitter = emitter;
+  this.entryStack = [new FunctionEntry(emitter.finalLoc)];
+}
+
+var LMp = LeapManager.prototype;
+exports.LeapManager = LeapManager;
+
+LMp.withEntry = function (entry, callback) {
+  _assert2.default.ok(entry instanceof Entry);
+  this.entryStack.push(entry);
+  try {
+    callback.call(this.emitter);
+  } finally {
+    var popped = this.entryStack.pop();
+    _assert2.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);
+};