sval
Version:
A javascript interpreter written in javascript
1,231 lines • 231 kB
JavaScript
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get BreakStatement() {
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get ContinueStatement() {
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},
get DebuggerStatement() {
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},
get DoWhileStatement() {
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get EmptyStatement() {
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get ExpressionStatement() {
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},
get ForInStatement() {
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get ForOfStatement() {
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get ForStatement() {
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get IfStatement() {
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},
get LabeledStatement() {
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},
get ReturnStatement() {
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},
get SwitchCase() {
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},
get SwitchStatement() {
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},
get ThrowStatement() {
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get TryStatement() {
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get WithStatement() {
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get ExportNamedDeclaration() {
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get FunctionDeclaration() {
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get ImportDeclaration() {
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get MethodDefinition() {
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get PropertyDefinition() {
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get StaticBlock() {
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get ContinueStatement() {
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get DebuggerStatement() {
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get DoWhileStatement() {
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get EmptyStatement() {
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get ExpressionStatement() {
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get ForOfStatement() {
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get ForStatement() {
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get IfStatement() {
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get LabeledStatement() {
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get ReturnStatement() {
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get SwitchCase() {
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get SwitchStatement() {
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get ThrowStatement() {
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get TryStatement() {
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get WithStatement() {
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get ExportDefaultDeclaration() {
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get ExportNamedDeclaration() {
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get FunctionDeclaration() {
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function It(e, t) {
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function Pr(e, t) {
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function Xt(e, t) {
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function Yt(e, t) {
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value: e,
writable: !0
}
});
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function tt(e, t, r = []) {
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function Tr(e) {
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const z = Object.assign || Tr;
let Ze = [], h = Ce(null);
const He = (e) => {
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Ze = At(h = e).filter((t) => ["webkitStorageInfo", "GLOBAL", "root"].indexOf(t) === -1);
};
try {
He(window);
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He(self);
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try {
He(global);
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try {
He(globalThis);
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try {
h.Function = Function;
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}
try {
h.Array = Array;
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try {
h.Number = Number;
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try {
h.parseFloat = parseFloat;
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}
try {
h.parseInt = parseInt;
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try {
h.Infinity = 1 / 0;
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try {
h.NaN = NaN;
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try {
h.undefined = void 0;
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try {
h.Boolean = Boolean;
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try {
h.String = String;
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}
try {
h.Symbol = Symbol;
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try {
h.Date = Date;
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try {
h.Promise = Promise;
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try {
h.RegExp = RegExp;
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try {
h.Error = Error;
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try {
h.EvalError = EvalError;
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try {
h.RangeError = RangeError;
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try {
h.ReferenceError = ReferenceError;
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try {
h.SyntaxError = SyntaxError;
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try {
h.TypeError = TypeError;
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try {
h.URIError = URIError;
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try {
h.JSON = JSON;
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try {
h.Math = Math;
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}
try {
h.console = console;
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}
try {
h.Intl = Intl;
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try {
h.ArrayBuffer = ArrayBuffer;
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}
try {
h.Uint8Array = Uint8Array;
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try {
h.Int8Array = Int8Array;
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try {
h.Uint16Array = Uint16Array;
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try {
h.Int16Array = Int16Array;
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try {
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try {
h.Int32Array = Int32Array;
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try {
h.Float32Array = Float32Array;
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try {
h.Float64Array = Float64Array;
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try {
h.Uint8ClampedArray = Uint8ClampedArray;
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try {
h.DataView = DataView;
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try {
h.Map = Map;
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try {
h.Set = Set;
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try {
h.WeakMap = WeakMap;
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try {
h.WeakSet = WeakSet;
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try {
h.Proxy = Proxy;
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try {
h.Reflect = Reflect;
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try {
h.BigInt = BigInt;
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try {
h.decodeURI = decodeURI;
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try {
h.decodeURIComponent = decodeURIComponent;
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try {
h.encodeURI = encodeURI;
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try {
h.encodeURIComponent = encodeURIComponent;
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try {
h.escape = escape;
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try {
h.unescape = unescape;
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try {
h.eval = eval;
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try {
h.isFinite = isFinite;
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try {
h.isNaN = isNaN;
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try {
h.SharedArrayBuffer = SharedArrayBuffer;
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}
try {
h.Atomics = Atomics;
} catch {
}
try {
h.WebAssembly = WebAssembly;
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}
try {
h.clearInterval = clearInterval;
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}
try {
h.clearTimeout = clearTimeout;
} catch {
}
try {
h.setInterval = setInterval;
} catch {
}
try {
h.setTimeout = setTimeout;
} catch {
}
try {
h.crypto = crypto;
} catch {
}
try {
h.URL = URL;
} catch {
}
Ze = At(h);
}
}
}
}
h.Symbol && (!h.Symbol.iterator && (h.Symbol.iterator = B("iterator")), !h.Symbol.asyncIterator && (h.Symbol.asyncIterator = B("asynciterator")));
const ei = Ce({});
for (let e = 0; e < Ze.length; e++) {
const t = Ze[e];
try {
ei[t] = h[t];
} catch {
}
}
const Oe = B("window");
function Vr() {
return z(Ce({ [Oe]: h }), ei);
}
function B(e) {
return e + Math.random().toString(36).substring(2);
}
function Nr(e) {
let t;
if (typeof Symbol == "function" && (t = e[Symbol.asyncIterator], !t && (t = e[Symbol.iterator])), t)
return t.call(e);
if (typeof e.next == "function")
return e;
{
let r = 0;
return {
next() {
return e && r >= e.length && (e = void 0), { value: e && e[r++], done: !e };
}
};
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// By default, await identifiers are allowed to appear at the top-level scope only if ecmaVersion >= 2022.
// When enabled, await identifiers are allowed to appear at the top-level scope,
// but they are still not allowed in non-async functions.
allowAwaitOutsideFunction: null,
// When enabled, super identifiers are not constrained to
// appearing in methods and do not raise an error when they appear elsewhere.
allowSuperOutsideMethod: null,
// When enabled, hashbang directive in the beginning of file is
// allowed and treated as a line comment. Enabled by default when
// `ecmaVersion` >= 2023.
allowHashBang: !1,
// By default, the parser will verify that private properties are
// only used in places where they are valid and have been declared.
// Set this to false to turn such checks off.
checkPrivateFields: !0,
// When `locations` is on, `loc` properties holding objects with
// `start` and `end` properties in `{line, column}` form (with
// line being 1-based and column 0-based) will be attached to the
// nodes.
locations: !1,
// A function can be passed as `onToken` option, which will
// cause Acorn to call that function with object in the same
// format as tokens returned from `tokenizer().getToken()`. Note
// that you are not allowed to call the parser from the
// callback—that will corrupt its internal state.
onToken: null,
// A function can be passed as `onComment` option, which will
// cause Acorn to call that function with `(block, text, start,
// end)` parameters whenever a comment is skipped. `block` is a
// boolean indicating whether this is a block (`/* */`) comment,
// `text` is the content of the comment, and `start` and `end` are
// character offsets that denote the start and end of the comment.
// When the `locations` option is on, two more parameters are
// passed, the full `{line, column}` locations of the start and
// end of the comments. Note that you are not allowed to call the
// parser from the callback—that will corrupt its internal state.
// When this option has an array as value, objects representing the
// comments are pushed to it.
onComment: null,
// Nodes have their start and end characters offsets recorded in
// `start` and `end` properties (directly on the node, rather than
// the `loc` object, which holds line/column data. To also add a
// [semi-standardized][range] `range` property holding a `[start,
// end]` array with the same numbers, set the `ranges` option to
// `true`.
//
// [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
ranges: !1,
// It is possible to parse multiple files into a single AST by
// passing the tree produced by parsing the first file as
// `program` option in subsequent parses. This will add the
// toplevel forms of the parsed file to the `Program` (top) node
// of an existing parse tree.
program: null,
// When `locations` is on, you can pass this to record the source
// file in every node's `loc` object.
sourceFile: null,
// This value, if given, is stored in every node, whether
// `locations` is on or off.
directSourceFile: null,
// When enabled, parenthesized expressions are represented by
// (non-standard) ParenthesizedExpression nodes
preserveParens: !1
}, zt = !1;
function Wr(e) {
var t = {};
for (var r in xt)
t[r] = e && Te(e, r) ? e[r] : xt[r];
if (t.ecmaVersion === "latest" ? t.ecmaVersion = 1e8 : t.ecmaVersion == null ? (!zt && typeof console == "object" && console.warn && (zt = !0, console.warn(`Since Acorn 8.0.0, options.ecmaVersion is required.
Defaulting to 2020, but this will stop working in the future.`)), t.ecmaVersion = 11) : t.ecmaVersion >= 2015 && (t.ecmaVersion -= 2009), t.allowReserved == null && (t.allowReserved = t.ecmaVersion < 5), (!e || e.allowHashBang == null) && (t.allowHashBang = t.ecmaVersion >= 14), qt(t.onToken)) {
var i = t.onToken;
t.onToken = function(s) {
return i.push(s);
};
}
return qt(t.onComment) && (t.onComment = zr(t, t.onComment)), t;
}
function zr(e, t) {
return function(r, i, s, a, n, u) {
var l = {
type: r ? "Block" : "Line",
value: i,
start: s,
end: a
};
e.locations && (l.loc = new it(this, n, u)), e.ranges && (l.range = [s, a]), t.push(l);
};
}
var Fe = 1, Ve = 2, Lt = 4, oi = 8, Tt = 16, ui = 32, rt = 64, li = 128, ke = 256, Ue = 512, st = Fe | Ve | ke;
function Vt(e, t) {
return Ve | (e ? Lt : 0) | (t ? oi : 0);
}
var Xe = 0, Nt = 1, he = 2, ci = 3, fi = 4, hi = 5, N = function(t, r, i) {
this.options = t = Wr(t), this.sourceFile = t.sourceFile, this.keywords = pe(Or[t.ecmaVersion >= 6 ? 6 : t.sourceType === "module" ? "5module" : 5]);
var s = "";
t.allowReserved !== !0 && (s = ht[t.ecmaVersion >= 6 ? 6 : t.ecmaVersion === 5 ? 5 : 3], t.sourceType === "module" && (s += " await")), this.reservedWords = pe(s);
var a = (s ? s + " " : "") + ht.strict;
this.reservedWordsStrict = pe(a), this.reservedWordsStrictBind = pe(a + " " + ht.strictBind), this.input = String(r), this.containsEsc = !1, i ? (this.pos = i, this.lineStart = this.input.lastIndexOf(`
`, i - 1) + 1, this.curLine = this.input.slice(0, this.lineStart).split(Y).length) : (this.pos = this.lineStart = 0, this.curLine = 1), this.type = o.eof, this.value = null, this.start = this.end = this.pos, this.startLoc = this.endLoc = this.curPosition(), this.lastTokEndLoc = this.lastTokStartLoc = null, this.lastTokStart = this.lastTokEnd = this.pos, this.context = this.initialContext(), this.exprAllowed = !0, this.inModule = t.sourceType === "module", this.strict = this.inModule || this.strictDirective(this.pos), this.potentialArrowAt = -1, this.potentialArrowInForAwait = !1, this.yieldPos = this.awaitPos = this.awaitIdentPos = 0, this.labels = [], this.undefinedExports = /* @__PURE__ */ Object.create(null), this.pos === 0 && t.allowHashBang && this.input.slice(0, 2) === "#!" && this.skipLineComment(2), this.scopeStack = [], this.enterScope(Fe), this.regexpState = null, this.privateNameStack = [];
}, re = { inFunction: { configurable: !0 }, inGenerator: { configurable: !0 }, inAsync: { configurable: !0 }, canAwait: { configurable: !0 }, allowSuper: { configurable: !0 }, allowDirectSuper: { configurable: !0 }, treatFunctionsAsVar: { configurable: !0 }, allowNewDotTarget: { configurable: !0 }, inClassStaticBlock: { configurable: !0 } };
N.prototype.parse = function() {
var t = this.options.program || this.startNode();
return this.nextToken(), this.parseTopLevel(t);
};
re.inFunction.get = function() {
return (this.currentVarScope().flags & Ve) > 0;
};
re.inGenerator.get = function() {
return (this.currentVarScope().flags & oi) > 0;
};
re.inAsync.get = function() {
return (this.currentVarScope().flags & Lt) > 0;
};
re.canAwait.get = function() {
for (var e = this.scopeStack.length - 1; e >= 0; e--) {
var t = this.scopeStack[e], r = t.flags;
if (r & (ke | Ue))
return !1;
if (r & Ve)
return (r & Lt) > 0;
}
return this.inModule && this.options.ecmaVersion >= 13 || this.options.allowAwaitOutsideFunction;
};
re.allowSuper.get = function() {
var e = this.currentThisScope(), t = e.flags;
return (t & rt) > 0 || this.options.allowSuperOutsideMethod;
};
re.allowDirectSuper.get = function() {
return (this.currentThisScope().flags & li) > 0;
};
re.treatFunctionsAsVar.get = function() {
return this.treatFunctionsAsVarInScope(this.currentScope());
};
re.allowNewDotTarget.get = function() {
for (var e = this.scopeStack.length - 1; e >= 0; e--) {
var t = this.scopeStack[e], r = t.flags;
if (r & (ke | Ue) || r & Ve && !(r & Tt))
return !0;
}
return !1;
};
re.inClassStaticBlock.get = function() {
return (this.currentVarScope().flags & ke) > 0;
};
N.extend = function() {
for (var t = [], r = arguments.length; r--; ) t[r] = arguments[r];
for (var i = this, s = 0; s < t.length; s++)
i = t[s](i);
return i;
};
N.parse = function(t, r) {
return new this(r, t).parse();
};
N.parseExpressionAt = function(t, r, i) {
var s = new this(i, t, r);
return s.nextToken(), s.parseExpression();
};
N.tokenizer = function(t, r) {
return new this(r, t);
};
Object.defineProperties(N.prototype, re);
var M = N.prototype, Gr = /^(?:'((?:\\[^]|[^'\\])*?)'|"((?:\\[^]|[^"\\])*?)")/;
M.strictDirective = function(e) {
if (this.options.ecmaVersion < 5)
return !1;
for (; ; ) {
Z.lastIndex = e, e += Z.exec(this.input)[0].length;
var t = Gr.exec(this.input.slice(e));
if (!t)
return !1;
if ((t[1] || t[2]) === "use strict") {
Z.lastIndex = e + t[0].length;
var r = Z.exec(this.input), i = r.index + r[0].length, s = this.input.charAt(i);
return s === ";" || s === "}" || Y.test(r[0]) && !(/[(`.[+\-/*%<>=,?^&]/.test(s) || s === "!" && this.input.charAt(i + 1) === "=");
}
e += t[0].length, Z.lastIndex = e, e += Z.exec(this.input)[0].length, this.input[e] === ";" && e++;
}
};
M.eat = function(e) {
return this.type === e ? (this.next(), !0) : !1;
};
M.isContextual = function(e) {
return this.type === o.name && this.value === e && !this.containsEsc;
};
M.eatContextual = function(e) {
return this.isContextual(e) ? (this.next(), !0) : !1;
};
M.expectContextual = function(e) {
this.eatContextual(e) || this.unexpected();
};
M.canInsertSemicolon = function() {
return this.type === o.eof || this.type === o.braceR || Y.test(this.input.slice(this.lastTokEnd, this.start));
};
M.insertSemicolon = function() {
if (this.canInsertSemicolon())
return this.options.onInsertedSemicolon && this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc), !0;
};
M.semicolon = function() {
!this.eat(o.semi) && !this.insertSemicolon() && this.unexpected();
};
M.afterTrailingComma = function(e, t) {
if (this.type === e)
return this.options.onTrailingComma && this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc), t || this.next(), !0;
};
M.expect = function(e) {
this.eat(e) || this.unexpected();
};
M.unexpected = function(e) {
this.raise(e ?? this.start, "Unexpected token");
};
var at = function() {
this.shorthandAssign = this.trailingComma = this.parenthesizedAssign = this.parenthesizedBind = this.doubleProto = -1;
};
M.checkPatternErrors = function(e, t) {
if (e) {
e.trailingComma > -1 && this.raiseRecoverable(e.trailingComma, "Comma is not permitted after the rest element");
var r = t ? e.parenthesizedAssign : e.parenthesizedBind;
r > -1 && this.raiseRecoverable(r, t ? "Assigning to rvalue" : "Parenthesized pattern");
}
};
M.checkExpressionErrors = function(e, t) {
if (!e)
return !1;
var r = e.shorthandAssign, i = e.doubleProto;
if (!t)
return r >= 0 || i >= 0;
r >= 0 && this.raise(r, "Shorthand property assignments are valid only in destructuring patterns"), i >= 0 && this.raiseRecoverable(i, "Redefinition of __proto__ property");
};
M.checkYieldAwaitInDefaultParams = function() {
this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos) && this.raise(this.yieldPos, "Yield expression cannot be a default value"), this.awaitPos && this.raise(this.awaitPos, "Await expression cannot be a default value");
};
M.isSimpleAssignTarget = function(e) {
return e.type === "ParenthesizedExpression" ? this.isSimpleAssignTarget(e.expression) : e.type === "Identifier" || e.type === "MemberExpression";
};
var m = N.prototype;
m.parseTopLevel = function(e) {
var t = /* @__PURE__ */ Object.create(null);
for (e.body || (e.body = []); this.type !== o.eof; ) {
var r = this.parseStatement(null, !0, t);
e.body.push(r);
}
if (this.inModule)
for (var i = 0, s = Object.keys(this.undefinedExports); i < s.length; i += 1) {
var a = s[i];
this.raiseRecoverable(this.undefinedExports[a].start, "Export '" + a + "' is not defined");
}
return this.adaptDirectivePrologue(e.body), this.next(), e.sourceType = this.options.sourceType, this.finishNode(e, "Program");
};
var Rt = { kind: "loop" }, Hr = { kind: "switch" };
m.isLet = function(e) {
if (this.options.ecmaVersion < 6 || !this.isContextual("let"))
return !1;
Z.lastIndex = this.pos;
var t = Z.exec(this.input), r = this.pos + t[0].length, i = this.input.charCodeAt(r);
if (i === 91 || i === 92)
return !0;
if (e)
return !1;
if (i === 123 || i > 55295 && i < 56320)
return !0;
if (oe(i, !0)) {
for (var s = r + 1; _e(i = this.input.charCodeAt(s), !0); )
++s;
if (i === 92 || i > 55295 && i < 56320)
return !0;
var a = this.input.slice(r, s);
if (!Dr.test(a))
return !0;
}
return !1;
};
m.isAsyncFunction = function() {
if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
return !1;
Z.lastIndex = this.pos;
var e = Z.exec(this.input), t = this.pos + e[0].length, r;
return !Y.test(this.input.slice(this.pos, t)) && this.input.slice(t, t + 8) === "function" && (t + 8 === this.input.length || !(_e(r = this.input.charCodeAt(t + 8)) || r > 55295 && r < 56320));
};
m.parseStatement = function(e, t, r) {
var i = this.type, s = this.startNode(), a;
switch (this.isLet(e) && (i = o._var, a = "let"), i) {
case o._break:
case o._continue:
return this.parseBreakContinueStatement(s, i.keyword);
case o._debugger:
return this.parseDebuggerStatement(s);
case o._do:
return this.parseDoStatement(s);
case o._for:
return this.parseForStatement(s);
case o._function:
return e && (this.strict || e !== "if" && e !== "label") && this.options.ecmaVersion >= 6 && this.unexpected(), this.parseFunctionStatement(s, !1, !e);
case o._class:
return e && this.unexpected(), this.parseClass(s, !0);
case o._if:
return this.parseIfStatement(s);
case o._return:
return this.parseReturnStatement(s);
case o._switch:
return this.parseSwitchStatement(s);
case o._throw:
return this.parseThrowStatement(s);
case o._try:
return this.parseTryStatement(s);
case o._const:
case o._var:
return a = a || this.value, e && a !== "var" && this.unexpected(), this.parseVarStatement(s, a);
case o._while:
return this.parseWhileStatement(s);
case o._with:
return this.parseWithStatement(s);
case o.braceL:
return this.parseBlock(!0, s);
case o.semi:
return this.parseEmptyStatement(s);
case o._export:
case o._import:
if (this.options.ecmaVersion > 10 && i === o._import) {
Z.lastIndex = this.pos;
var n = Z.exec(this.input), u = this.pos + n[0].length, l = this.input.charCodeAt(u);
if (l === 40 || l === 46)
return this.parseExpressionStatement(s, this.parseExpression());
}
return this.options.allowImportExportEverywhere || (t || this.raise(this.start, "'import' and 'export' may only appear at the top level"), this.inModule || this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")), i === o._import ? this.parseImport(s) : this.parseExport(s, r);
// If the statement does not start with a statement keyword or a
// brace, it's an ExpressionStatement or LabeledStatement. We
// simply start parsing an expression, and afterwards, if the
// next token is a colon and the expression was a simple
// Identifier node, we switch to interpreting it as a label.
default:
if (this.isAsyncFunction())
return e && this.unexpected(), this.next(), this.parseFunctionStatement(s, !0, !e);
var c = this.value, f = this.parseExpression();
return i === o.name && f.type === "Identifier" && this.eat(o.colon) ? this.parseLabeledStatement(s, c, f, e) : this.parseExpressionStatement(s, f);
}
};
m.parseBreakContinueStatement = function(e, t) {
var r = t === "break";
this.next(), this.eat(o.semi) || this.insertSemicolon() ? e.label = null : this.type !== o.name ? this.unexpected() : (e.label = this.parseIdent(), this.semicolon());
for (var i = 0; i < this.labels.length; ++i) {
var s = this.labels[i];
if ((e.label == null || s.name === e.label.name) && (s.kind != null && (r || s.kind === "loop") || e.label && r))
break;
}
return i === this.labels.length && this.raise(e.start, "Unsyntactic " + t), this.finishNode(e, r ? "BreakStatement" : "ContinueStatement");
};
m.parseDebuggerStatement = function(e) {
return this.next(), this.semicolon(), this.finishNode(e, "DebuggerStatement");
};
m.parseDoStatement = function(e) {
return this.next(), this.labels.push(Rt), e.body = this.parseStatement("do"), this.labels.pop(), this.expect(o._while), e.test = this.parseParenExpression(), this.options.ecmaVersion >= 6 ? this.eat(o.semi) : this.semicolon(), this.finishNode(e, "DoWhileStatement");
};
m.parseForStatement = function(e) {
this.next();
var t = this.options.ecmaVersion >= 9 && this.canAwait && this.eatContextual("await") ? this.lastTokStart : -1;
if (this.labels.push(Rt), this.enterScope(0), this.expect(o.parenL), this.type === o.semi)
return t > -1 && this.unexpected(t), this.parseFor(e, null);
var r = this.isLet();
if (this.type === o._var || this.type === o._const || r) {
var i = this.startNode(), s = r ? "let" : this.value;
return this.next(), this.parseVar(i, !0, s), this.finishNode(i, "VariableDeclaration"), (this.type === o._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) && i.declarations.length === 1 ? (this.options.ecmaVersion >= 9 && (this.type === o._in ? t > -1 && this.unexpected(t) : e.await = t > -1), this.parseForIn(e, i)) : (t > -1 && this.unexpected(t), this.parseFor(e, i));
}
var a = this.isContextual("let"), n = !1, u = this.containsEsc, l = new at(), c = this.start, f = t > -1 ? this.parseExprSubscripts(l, "await") : this.parseExpression(!0, l);
return this.type === o._in || (n = this.options.ecmaVersion >= 6 && this.isContextual("of")) ? (t > -1 ? (this.type === o._in && this.unexpected(t), e.await = !0) : n && this.options.ecmaVersion >= 8 && (f.start === c && !u && f.type === "Identifier" && f.name === "async" ? this.unexpected() : this.options.ecmaVersion >= 9 && (e.await = !1)), a && n && this.raise(f.start, "The left-hand side of a for-of loop may not start with 'let'."), this.toAssignable(f, !1, l), this.checkLValPattern(f), this.parseForIn(e, f)) : (this.checkExpressionErrors(l, !0), t > -1 && this.unexpected(t), this.parseFor(e, f));
};
m.parseFunctionStatement = function(e, t, r) {
return this.next(), this.parseFunction(e, Be | (r ? 0 : bt), !1, t);
};
m.parseIfStatement = function(e) {
return this.next(), e.test = this.parseParenExpression(), e.consequent = this.parseStatement("if"), e.alternate = this.eat(o._else) ? this.parseStatement("if") : null, this.finishNode(e, "IfStatement");
};
m.parseReturnStatement = function(e) {
return !this.inFunction && !this.options.allowReturnOutsideFunction && this.raise(this.start, "'return' outside of function"), this.next(), this.eat(o.semi) || this.insertSemicolon() ? e.argument = null : (e.argument = this.parseExpression(), this.semicolon()), this.finishNode(e, "ReturnStatement");
};
m.parseSwitchStatement = function(e) {
this.next(), e.discriminant = this.parseParenExpression(), e.cases = [], this.expect(o.braceL), this.labels.push(Hr), this.enterScope(0);
for (var t, r = !1; this.type !== o.braceR; )
if (this.type === o._case || this.type === o._default) {
var i = this.type === o._case;
t && this.finishNode(t, "SwitchCase"), e.cases.push(t = this.startNode()), t.consequent = [], this.next(), i ? t.test = this.parseExpression() : (r && this.raiseRecoverable(this.lastTokStart, "Multiple default clauses"), r = !0, t.test = null), this.expect(o.colon);
} else
t || this.unexpected(), t.consequent.push(this.parseStatement(null));
return this.exitScope(), t && this.finishNode(t, "SwitchCase"), this.next(), this.labels.pop(), this.finishNode(e, "SwitchStatement");
};
m.parseThrowStatement = function(e) {
return this.next(), Y.test(this.input.slice(this.lastTokEnd, this.start)) && this.raise(this.lastTokEnd, "Illegal newline after throw"), e.argument = this.parseExpression(), this.semicolon(), this.finishNode(e, "ThrowStatement");
};
var Kr = [];
m.parseCatchClauseParam = function() {
var e = this.parseBindingAtom(), t = e.type === "Identifier";
return this.enterScope(t ? ui : 0), this.checkLValPattern(e, t ? fi : he), this.expect(o.parenR), e;
};
m.parseTryStatement = function(e) {
if (this.next(), e.block = this.parseBlock(), e.handler = null, this.type === o._catch) {
var t = this.startNode();
this.next(), this.eat(o.parenL) ? t.param = this.parseCatchClauseParam() : (this.options.ecmaVersion < 10 && this.unexpected(), t.param = null, this.enterScope(0)), t.body = this.parseBlock(!1), this.exitScope(), e.handler = this.finishNode(t, "CatchClause");
}
return e.finalizer = this.eat(o._finally) ? this.parseBlock() : null, !e.handler && !e.finalizer && this.raise(e.start, "Missing catch or finally clause"), this.finishNode(e, "TryStatement");
};
m.parseVarStatement = function(e, t, r) {
return this.next(), this.parseVar(e, !1, t, r), this.semicolon(), this.finishNode(e, "VariableDeclaration");
};
m.parseWhileStatement = function(e) {
return this.next(), e.test = this.parseParenExpression(), this.labels.push(Rt), e.body = this.parseStatement("while"), this.labels.pop(), this.finishNode(e, "WhileStatement");
};
m.parseWithStatement = function(e) {
return this.strict && this.raise(this.start, "'with' in strict mode"), this.next(), e.object = this.parseParenExpression(), e.body = this.parseStatement("with"), this.finishNode(e, "WithStatement");
};
m.parseEmptyStatement = function(e) {
return this.next(), this.finishNode(e, "EmptyStatement");
};
m.parseLabeledStatement = function(e, t, r, i) {
for (var s = 0, a = this.labels; s < a.length; s += 1) {
var n = a[s];
n.name === t && this.raise(r.start, "Label '" + t + "' is already declared");
}
for (var u = this.type.isLoop ? "loop" : this.type === o._switch ? "switch" : null, l = this.labels.length - 1; l >= 0; l--) {
var c = this.labels[l];
if (c.statementStart === e.start)
c.statementStart = this.start, c.kind = u;
else
break;
}
return this.labels.push({ name: t, kind: u, statementStart: this.start }), e.body = this.parseStatement(i ? i.indexOf("label") === -1 ? i + "label" : i : "label"), this.labels.pop(), e.label = r, this.finishNode(e, "LabeledStatement");
};
m.parseExpressionStatement = function(e, t) {
return e.expression = t, this.semicolon(), this.finishNode(e, "ExpressionStatement");
};
m.parseBlock = function(e, t, r) {
for (e === void 0 && (e = !0), t === void 0 && (t = this.startNode()), t.body = [], this.expect(o.braceL), e && this.enterScope(0); this.type !== o.braceR; ) {
var i = this.parseStatement(null);
t.body.push(i);
}
return r && (this.strict = !1), this.next(), e && this.exitScope(), this.finishNode(t, "BlockStatement");
};
m.parseFor = function(e, t) {
return e.init = t, this.expect(o.semi), e.test = this.type === o.semi ? null : this.parseExpression(), this.expect(o.semi), e.update = this.type === o.parenR ? null : this.parseExpression(), this.expect(o.parenR), e.body = this.parseStatement("for"), this.exitScope(), this.labels.pop(), this.finishNode(e, "ForStatement");
};
m.parseForIn = function(e, t) {
var r = this.type === o._in;
return this.next(), t.type === "VariableDeclaration" && t.declarations[0].init != null && (!r || this.options.ecmaVersion < 8 || this.strict || t.kind !== "var" || t.declarations[0].id.type !== "Identifier") && this.raise(
t.start,
(r ? "for-in" : "for-of") + " loop variable declaration may not have an initializer"
), e.left = t, e.right = r ? this.parseExpression() : this.parseMaybeAssign(), this.expect(o.parenR), e.body = this.parseStatement("for"), this.exitScope(), this.labels.pop(), this.finishNode(e, r ? "ForInStatement" : "ForOfStatement");
};
m.parseVar = function(e, t, r, i) {
for (e.declarations = [], e.kind = r; ; ) {
var s = this.startNode();
if (this.parseVarId(s, r), this.eat(o.eq) ? s.init = this.parseMaybeAssign(t) : !i && r === "const" && !(this.type === o._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) ? this.unexpected() : !i && s.id.type !== "Identifier" && !(t && (this.type === o._in || this.isContextual("of"))) ? this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value") : s.init = null, e.declarations.push(this.finishNode(s, "VariableDeclarator")), !this.eat(o.comma))
break;
}
return e;
};
m.parseVarId = function(e, t) {
e.id = this.parseBindingAtom(), this.checkLValPattern(e.id, t === "var" ? Nt : he, !1);
};
var Be = 1, bt = 2, pi = 4;
m.parseFunction = function(e, t, r, i, s) {
this.initFunction(e), (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !i) && (this.type === o.star && t & bt && this.unexpected(), e.generator = this.eat(o.star)), this.options.ecmaVersion >= 8 && (e.async = !!i), t & Be && (e.id = t & pi && this.type !== o.name ? null : this.parseIdent(), e.id && !(t & bt) && this.checkLValSimple(e.id, this.strict || e.generator || e.async ? this.treatFunctionsAsVar ? Nt : he : ci));
var a = this.yieldPos, n = this.awaitPos, u = this.awaitIdentPos;
return this.yieldPos = 0, this.awaitPos = 0, this.awaitIdentPos = 0, this.enterScope(Vt(e.async, e.generator)), t & Be || (e.id = this.type === o.name ? this.parseIdent() : null), this.parseFunctionParams(e), this.parseFunctionBody(e, r, !1, s), this.yieldPos = a, this.awaitPos = n, this.awaitIdentPos = u, this.finishNode(e, t & Be ? "FunctionDeclaration" : "FunctionExpression");
};
m.parseFunctionParams = function(e) {
this.expect(o.parenL), e.params = this.parseBindingList(o.parenR, !1, this.options.ecmaVersion >= 8), this.checkYieldAwaitInDefaultParams();
};
m.parseClass = function(e, t) {
this.next();
var r = this.strict;
this.strict = !0, this.parseClassId(e, t), this.parseClassSuper(e);
var i = this.enterClassBody(), s = this.startNode(), a = !1;
for (s.body =