1364 lines
45 KiB
JavaScript
1364 lines
45 KiB
JavaScript
import { tokTypes, SourceLocation, Node, lineBreak, isNewLine, Parser, Token, getLineInfo, lineBreakG, defaultOptions } from 'acorn';
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function noop() {}
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var LooseParser = function LooseParser(input, options) {
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if ( options === void 0 ) options = {};
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this.toks = this.constructor.BaseParser.tokenizer(input, options);
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this.options = this.toks.options;
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this.input = this.toks.input;
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this.tok = this.last = {type: tokTypes.eof, start: 0, end: 0};
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this.tok.validateRegExpFlags = noop;
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this.tok.validateRegExpPattern = noop;
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if (this.options.locations) {
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var here = this.toks.curPosition();
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this.tok.loc = new SourceLocation(this.toks, here, here);
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}
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this.ahead = []; // Tokens ahead
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this.context = []; // Indentation contexted
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this.curIndent = 0;
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this.curLineStart = 0;
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this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
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this.inAsync = false;
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this.inFunction = false;
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};
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LooseParser.prototype.startNode = function startNode () {
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return new Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null)
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};
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LooseParser.prototype.storeCurrentPos = function storeCurrentPos () {
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return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start
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};
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LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
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if (this.options.locations) {
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return new Node(this.toks, pos[0], pos[1])
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} else {
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return new Node(this.toks, pos)
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}
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};
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LooseParser.prototype.finishNode = function finishNode (node, type) {
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node.type = type;
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node.end = this.last.end;
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if (this.options.locations)
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{ node.loc.end = this.last.loc.end; }
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if (this.options.ranges)
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{ node.range[1] = this.last.end; }
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return node
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};
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LooseParser.prototype.dummyNode = function dummyNode (type) {
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var dummy = this.startNode();
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dummy.type = type;
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dummy.end = dummy.start;
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if (this.options.locations)
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{ dummy.loc.end = dummy.loc.start; }
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if (this.options.ranges)
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{ dummy.range[1] = dummy.start; }
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this.last = {type: tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
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return dummy
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};
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LooseParser.prototype.dummyIdent = function dummyIdent () {
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var dummy = this.dummyNode("Identifier");
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dummy.name = "✖";
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return dummy
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};
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LooseParser.prototype.dummyString = function dummyString () {
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var dummy = this.dummyNode("Literal");
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dummy.value = dummy.raw = "✖";
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return dummy
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};
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LooseParser.prototype.eat = function eat (type) {
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if (this.tok.type === type) {
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this.next();
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return true
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} else {
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return false
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}
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};
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LooseParser.prototype.isContextual = function isContextual (name) {
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return this.tok.type === tokTypes.name && this.tok.value === name
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};
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LooseParser.prototype.eatContextual = function eatContextual (name) {
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return this.tok.value === name && this.eat(tokTypes.name)
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};
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LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () {
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return this.tok.type === tokTypes.eof || this.tok.type === tokTypes.braceR ||
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lineBreak.test(this.input.slice(this.last.end, this.tok.start))
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};
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LooseParser.prototype.semicolon = function semicolon () {
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return this.eat(tokTypes.semi)
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};
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LooseParser.prototype.expect = function expect (type) {
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if (this.eat(type)) { return true }
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for (var i = 1; i <= 2; i++) {
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if (this.lookAhead(i).type === type) {
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for (var j = 0; j < i; j++) { this.next(); }
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return true
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}
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}
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};
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LooseParser.prototype.pushCx = function pushCx () {
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this.context.push(this.curIndent);
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};
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LooseParser.prototype.popCx = function popCx () {
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this.curIndent = this.context.pop();
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};
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LooseParser.prototype.lineEnd = function lineEnd (pos) {
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while (pos < this.input.length && !isNewLine(this.input.charCodeAt(pos))) { ++pos; }
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return pos
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};
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LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
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for (var count = 0;; ++pos) {
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var ch = this.input.charCodeAt(pos);
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if (ch === 32) { ++count; }
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else if (ch === 9) { count += this.options.tabSize; }
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else { return count }
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}
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};
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LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
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if (this.tok.type === closeTok || this.tok.type === tokTypes.eof) { return true }
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return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
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(!blockHeuristic || this.nextLineStart >= this.input.length ||
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this.indentationAfter(this.nextLineStart) < indent)
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};
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LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
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for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
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var ch = this.input.charCodeAt(p);
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if (ch !== 9 && ch !== 32) { return false }
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}
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return true
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};
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LooseParser.prototype.extend = function extend (name, f) {
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this[name] = f(this[name]);
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};
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LooseParser.prototype.parse = function parse () {
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this.next();
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return this.parseTopLevel()
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};
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LooseParser.extend = function extend () {
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var plugins = [], len = arguments.length;
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while ( len-- ) plugins[ len ] = arguments[ len ];
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var cls = this;
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for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
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return cls
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};
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LooseParser.parse = function parse (input, options) {
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return new this(input, options).parse()
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};
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// Allows plugins to extend the base parser / tokenizer used
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LooseParser.BaseParser = Parser;
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var lp = LooseParser.prototype;
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function isSpace(ch) {
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return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || isNewLine(ch)
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}
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lp.next = function() {
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this.last = this.tok;
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if (this.ahead.length)
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{ this.tok = this.ahead.shift(); }
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else
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{ this.tok = this.readToken(); }
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if (this.tok.start >= this.nextLineStart) {
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while (this.tok.start >= this.nextLineStart) {
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this.curLineStart = this.nextLineStart;
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this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
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}
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this.curIndent = this.indentationAfter(this.curLineStart);
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}
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};
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lp.readToken = function() {
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for (;;) {
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try {
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this.toks.next();
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if (this.toks.type === tokTypes.dot &&
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this.input.substr(this.toks.end, 1) === "." &&
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this.options.ecmaVersion >= 6) {
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this.toks.end++;
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this.toks.type = tokTypes.ellipsis;
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}
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return new Token(this.toks)
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} catch (e) {
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if (!(e instanceof SyntaxError)) { throw e }
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// Try to skip some text, based on the error message, and then continue
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var msg = e.message, pos = e.raisedAt, replace = true;
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if (/unterminated/i.test(msg)) {
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pos = this.lineEnd(e.pos + 1);
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if (/string/.test(msg)) {
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replace = {start: e.pos, end: pos, type: tokTypes.string, value: this.input.slice(e.pos + 1, pos)};
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} else if (/regular expr/i.test(msg)) {
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var re = this.input.slice(e.pos, pos);
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try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ }
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replace = {start: e.pos, end: pos, type: tokTypes.regexp, value: re};
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} else if (/template/.test(msg)) {
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replace = {
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start: e.pos,
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end: pos,
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type: tokTypes.template,
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value: this.input.slice(e.pos, pos)
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};
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} else {
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replace = false;
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}
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} else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
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while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
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} else if (/character escape|expected hexadecimal/i.test(msg)) {
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while (pos < this.input.length) {
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var ch = this.input.charCodeAt(pos++);
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if (ch === 34 || ch === 39 || isNewLine(ch)) { break }
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}
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} else if (/unexpected character/i.test(msg)) {
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pos++;
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replace = false;
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} else if (/regular expression/i.test(msg)) {
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replace = true;
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} else {
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throw e
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}
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this.resetTo(pos);
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if (replace === true) { replace = {start: pos, end: pos, type: tokTypes.name, value: "✖"}; }
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if (replace) {
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if (this.options.locations)
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{ replace.loc = new SourceLocation(
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this.toks,
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getLineInfo(this.input, replace.start),
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getLineInfo(this.input, replace.end)); }
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return replace
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}
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}
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}
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};
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lp.resetTo = function(pos) {
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this.toks.pos = pos;
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var ch = this.input.charAt(pos - 1);
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this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
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/[enwfd]/.test(ch) &&
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/\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos));
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if (this.options.locations) {
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this.toks.curLine = 1;
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this.toks.lineStart = lineBreakG.lastIndex = 0;
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var match;
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while ((match = lineBreakG.exec(this.input)) && match.index < pos) {
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++this.toks.curLine;
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this.toks.lineStart = match.index + match[0].length;
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}
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}
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};
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lp.lookAhead = function(n) {
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while (n > this.ahead.length)
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{ this.ahead.push(this.readToken()); }
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return this.ahead[n - 1]
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};
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function isDummy(node) { return node.name === "✖" }
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var lp$1 = LooseParser.prototype;
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lp$1.parseTopLevel = function() {
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var node = this.startNodeAt(this.options.locations ? [0, getLineInfo(this.input, 0)] : 0);
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node.body = [];
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while (this.tok.type !== tokTypes.eof) { node.body.push(this.parseStatement()); }
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this.toks.adaptDirectivePrologue(node.body);
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this.last = this.tok;
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node.sourceType = this.options.sourceType;
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return this.finishNode(node, "Program")
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};
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lp$1.parseStatement = function() {
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var starttype = this.tok.type, node = this.startNode(), kind;
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if (this.toks.isLet()) {
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starttype = tokTypes._var;
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kind = "let";
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}
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switch (starttype) {
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case tokTypes._break: case tokTypes._continue:
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this.next();
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var isBreak = starttype === tokTypes._break;
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if (this.semicolon() || this.canInsertSemicolon()) {
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node.label = null;
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} else {
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node.label = this.tok.type === tokTypes.name ? this.parseIdent() : null;
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this.semicolon();
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}
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return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
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case tokTypes._debugger:
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this.next();
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this.semicolon();
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return this.finishNode(node, "DebuggerStatement")
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case tokTypes._do:
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this.next();
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node.body = this.parseStatement();
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node.test = this.eat(tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
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this.semicolon();
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return this.finishNode(node, "DoWhileStatement")
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case tokTypes._for:
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this.next(); // `for` keyword
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var isAwait = this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await");
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this.pushCx();
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this.expect(tokTypes.parenL);
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if (this.tok.type === tokTypes.semi) { return this.parseFor(node, null) }
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var isLet = this.toks.isLet();
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if (isLet || this.tok.type === tokTypes._var || this.tok.type === tokTypes._const) {
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var init$1 = this.parseVar(this.startNode(), true, isLet ? "let" : this.tok.value);
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if (init$1.declarations.length === 1 && (this.tok.type === tokTypes._in || this.isContextual("of"))) {
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if (this.options.ecmaVersion >= 9 && this.tok.type !== tokTypes._in) {
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node.await = isAwait;
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}
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return this.parseForIn(node, init$1)
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}
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return this.parseFor(node, init$1)
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}
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var init = this.parseExpression(true);
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if (this.tok.type === tokTypes._in || this.isContextual("of")) {
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if (this.options.ecmaVersion >= 9 && this.tok.type !== tokTypes._in) {
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node.await = isAwait;
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}
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return this.parseForIn(node, this.toAssignable(init))
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}
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return this.parseFor(node, init)
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case tokTypes._function:
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this.next();
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return this.parseFunction(node, true)
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case tokTypes._if:
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this.next();
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node.test = this.parseParenExpression();
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node.consequent = this.parseStatement();
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node.alternate = this.eat(tokTypes._else) ? this.parseStatement() : null;
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return this.finishNode(node, "IfStatement")
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case tokTypes._return:
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this.next();
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if (this.eat(tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
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else { node.argument = this.parseExpression(); this.semicolon(); }
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return this.finishNode(node, "ReturnStatement")
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case tokTypes._switch:
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var blockIndent = this.curIndent, line = this.curLineStart;
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this.next();
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node.discriminant = this.parseParenExpression();
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node.cases = [];
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this.pushCx();
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this.expect(tokTypes.braceL);
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var cur;
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while (!this.closes(tokTypes.braceR, blockIndent, line, true)) {
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if (this.tok.type === tokTypes._case || this.tok.type === tokTypes._default) {
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var isCase = this.tok.type === tokTypes._case;
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if (cur) { this.finishNode(cur, "SwitchCase"); }
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node.cases.push(cur = this.startNode());
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cur.consequent = [];
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this.next();
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if (isCase) { cur.test = this.parseExpression(); }
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else { cur.test = null; }
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this.expect(tokTypes.colon);
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} else {
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if (!cur) {
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node.cases.push(cur = this.startNode());
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cur.consequent = [];
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cur.test = null;
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}
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cur.consequent.push(this.parseStatement());
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}
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}
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if (cur) { this.finishNode(cur, "SwitchCase"); }
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this.popCx();
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this.eat(tokTypes.braceR);
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return this.finishNode(node, "SwitchStatement")
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case tokTypes._throw:
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this.next();
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node.argument = this.parseExpression();
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this.semicolon();
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return this.finishNode(node, "ThrowStatement")
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case tokTypes._try:
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this.next();
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node.block = this.parseBlock();
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node.handler = null;
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if (this.tok.type === tokTypes._catch) {
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var clause = this.startNode();
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this.next();
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if (this.eat(tokTypes.parenL)) {
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clause.param = this.toAssignable(this.parseExprAtom(), true);
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this.expect(tokTypes.parenR);
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} else {
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clause.param = null;
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}
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clause.body = this.parseBlock();
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node.handler = this.finishNode(clause, "CatchClause");
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}
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node.finalizer = this.eat(tokTypes._finally) ? this.parseBlock() : null;
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if (!node.handler && !node.finalizer) { return node.block }
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return this.finishNode(node, "TryStatement")
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case tokTypes._var:
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case tokTypes._const:
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return this.parseVar(node, false, kind || this.tok.value)
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case tokTypes._while:
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this.next();
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node.test = this.parseParenExpression();
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node.body = this.parseStatement();
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return this.finishNode(node, "WhileStatement")
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case tokTypes._with:
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this.next();
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node.object = this.parseParenExpression();
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node.body = this.parseStatement();
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return this.finishNode(node, "WithStatement")
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case tokTypes.braceL:
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return this.parseBlock()
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case tokTypes.semi:
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this.next();
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return this.finishNode(node, "EmptyStatement")
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case tokTypes._class:
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return this.parseClass(true)
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case tokTypes._import:
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if (this.options.ecmaVersion > 10 && this.lookAhead(1).type === tokTypes.parenL) {
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node.expression = this.parseExpression();
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this.semicolon();
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return this.finishNode(node, "ExpressionStatement")
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}
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return this.parseImport()
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case tokTypes._export:
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return this.parseExport()
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default:
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if (this.toks.isAsyncFunction()) {
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this.next();
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this.next();
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return this.parseFunction(node, true, true)
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}
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var expr = this.parseExpression();
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if (isDummy(expr)) {
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this.next();
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if (this.tok.type === tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
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return this.parseStatement()
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} else if (starttype === tokTypes.name && expr.type === "Identifier" && this.eat(tokTypes.colon)) {
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node.body = this.parseStatement();
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node.label = expr;
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return this.finishNode(node, "LabeledStatement")
|
|
} else {
|
|
node.expression = expr;
|
|
this.semicolon();
|
|
return this.finishNode(node, "ExpressionStatement")
|
|
}
|
|
}
|
|
};
|
|
|
|
lp$1.parseBlock = function() {
|
|
var node = this.startNode();
|
|
this.pushCx();
|
|
this.expect(tokTypes.braceL);
|
|
var blockIndent = this.curIndent, line = this.curLineStart;
|
|
node.body = [];
|
|
while (!this.closes(tokTypes.braceR, blockIndent, line, true))
|
|
{ node.body.push(this.parseStatement()); }
|
|
this.popCx();
|
|
this.eat(tokTypes.braceR);
|
|
return this.finishNode(node, "BlockStatement")
|
|
};
|
|
|
|
lp$1.parseFor = function(node, init) {
|
|
node.init = init;
|
|
node.test = node.update = null;
|
|
if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.semi) { node.test = this.parseExpression(); }
|
|
if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.parenR) { node.update = this.parseExpression(); }
|
|
this.popCx();
|
|
this.expect(tokTypes.parenR);
|
|
node.body = this.parseStatement();
|
|
return this.finishNode(node, "ForStatement")
|
|
};
|
|
|
|
lp$1.parseForIn = function(node, init) {
|
|
var type = this.tok.type === tokTypes._in ? "ForInStatement" : "ForOfStatement";
|
|
this.next();
|
|
node.left = init;
|
|
node.right = this.parseExpression();
|
|
this.popCx();
|
|
this.expect(tokTypes.parenR);
|
|
node.body = this.parseStatement();
|
|
return this.finishNode(node, type)
|
|
};
|
|
|
|
lp$1.parseVar = function(node, noIn, kind) {
|
|
node.kind = kind;
|
|
this.next();
|
|
node.declarations = [];
|
|
do {
|
|
var decl = this.startNode();
|
|
decl.id = this.options.ecmaVersion >= 6 ? this.toAssignable(this.parseExprAtom(), true) : this.parseIdent();
|
|
decl.init = this.eat(tokTypes.eq) ? this.parseMaybeAssign(noIn) : null;
|
|
node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
|
|
} while (this.eat(tokTypes.comma))
|
|
if (!node.declarations.length) {
|
|
var decl$1 = this.startNode();
|
|
decl$1.id = this.dummyIdent();
|
|
node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
|
|
}
|
|
if (!noIn) { this.semicolon(); }
|
|
return this.finishNode(node, "VariableDeclaration")
|
|
};
|
|
|
|
lp$1.parseClass = function(isStatement) {
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); }
|
|
else if (isStatement === true) { node.id = this.dummyIdent(); }
|
|
else { node.id = null; }
|
|
node.superClass = this.eat(tokTypes._extends) ? this.parseExpression() : null;
|
|
node.body = this.startNode();
|
|
node.body.body = [];
|
|
this.pushCx();
|
|
var indent = this.curIndent + 1, line = this.curLineStart;
|
|
this.eat(tokTypes.braceL);
|
|
if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
|
|
while (!this.closes(tokTypes.braceR, indent, line)) {
|
|
if (this.semicolon()) { continue }
|
|
var method = this.startNode(), isGenerator = (void 0), isAsync = (void 0);
|
|
if (this.options.ecmaVersion >= 6) {
|
|
method.static = false;
|
|
isGenerator = this.eat(tokTypes.star);
|
|
}
|
|
this.parsePropertyName(method);
|
|
if (isDummy(method.key)) { if (isDummy(this.parseMaybeAssign())) { this.next(); } this.eat(tokTypes.comma); continue }
|
|
if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
|
|
(this.tok.type !== tokTypes.parenL && this.tok.type !== tokTypes.braceL)) {
|
|
method.static = true;
|
|
isGenerator = this.eat(tokTypes.star);
|
|
this.parsePropertyName(method);
|
|
} else {
|
|
method.static = false;
|
|
}
|
|
if (!method.computed &&
|
|
method.key.type === "Identifier" && method.key.name === "async" && this.tok.type !== tokTypes.parenL &&
|
|
!this.canInsertSemicolon()) {
|
|
isAsync = true;
|
|
isGenerator = this.options.ecmaVersion >= 9 && this.eat(tokTypes.star);
|
|
this.parsePropertyName(method);
|
|
} else {
|
|
isAsync = false;
|
|
}
|
|
if (this.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
|
|
!method.computed && (method.key.name === "get" || method.key.name === "set") &&
|
|
this.tok.type !== tokTypes.parenL && this.tok.type !== tokTypes.braceL) {
|
|
method.kind = method.key.name;
|
|
this.parsePropertyName(method);
|
|
method.value = this.parseMethod(false);
|
|
} else {
|
|
if (!method.computed && !method.static && !isGenerator && !isAsync && (
|
|
method.key.type === "Identifier" && method.key.name === "constructor" ||
|
|
method.key.type === "Literal" && method.key.value === "constructor")) {
|
|
method.kind = "constructor";
|
|
} else {
|
|
method.kind = "method";
|
|
}
|
|
method.value = this.parseMethod(isGenerator, isAsync);
|
|
}
|
|
node.body.body.push(this.finishNode(method, "MethodDefinition"));
|
|
}
|
|
this.popCx();
|
|
if (!this.eat(tokTypes.braceR)) {
|
|
// If there is no closing brace, make the node span to the start
|
|
// of the next token (this is useful for Tern)
|
|
this.last.end = this.tok.start;
|
|
if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
|
|
}
|
|
this.semicolon();
|
|
this.finishNode(node.body, "ClassBody");
|
|
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
|
|
};
|
|
|
|
lp$1.parseFunction = function(node, isStatement, isAsync) {
|
|
var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 6) {
|
|
node.generator = this.eat(tokTypes.star);
|
|
}
|
|
if (this.options.ecmaVersion >= 8) {
|
|
node.async = !!isAsync;
|
|
}
|
|
if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); }
|
|
else if (isStatement === true) { node.id = this.dummyIdent(); }
|
|
this.inAsync = node.async;
|
|
this.inFunction = true;
|
|
node.params = this.parseFunctionParams();
|
|
node.body = this.parseBlock();
|
|
this.toks.adaptDirectivePrologue(node.body.body);
|
|
this.inAsync = oldInAsync;
|
|
this.inFunction = oldInFunction;
|
|
return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
|
|
};
|
|
|
|
lp$1.parseExport = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.eat(tokTypes.star)) {
|
|
node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
|
|
return this.finishNode(node, "ExportAllDeclaration")
|
|
}
|
|
if (this.eat(tokTypes._default)) {
|
|
// export default (function foo() {}) // This is FunctionExpression.
|
|
var isAsync;
|
|
if (this.tok.type === tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
|
|
var fNode = this.startNode();
|
|
this.next();
|
|
if (isAsync) { this.next(); }
|
|
node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
|
|
} else if (this.tok.type === tokTypes._class) {
|
|
node.declaration = this.parseClass("nullableID");
|
|
} else {
|
|
node.declaration = this.parseMaybeAssign();
|
|
this.semicolon();
|
|
}
|
|
return this.finishNode(node, "ExportDefaultDeclaration")
|
|
}
|
|
if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
|
|
node.declaration = this.parseStatement();
|
|
node.specifiers = [];
|
|
node.source = null;
|
|
} else {
|
|
node.declaration = null;
|
|
node.specifiers = this.parseExportSpecifierList();
|
|
node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
|
|
this.semicolon();
|
|
}
|
|
return this.finishNode(node, "ExportNamedDeclaration")
|
|
};
|
|
|
|
lp$1.parseImport = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.tok.type === tokTypes.string) {
|
|
node.specifiers = [];
|
|
node.source = this.parseExprAtom();
|
|
} else {
|
|
var elt;
|
|
if (this.tok.type === tokTypes.name && this.tok.value !== "from") {
|
|
elt = this.startNode();
|
|
elt.local = this.parseIdent();
|
|
this.finishNode(elt, "ImportDefaultSpecifier");
|
|
this.eat(tokTypes.comma);
|
|
}
|
|
node.specifiers = this.parseImportSpecifiers();
|
|
node.source = this.eatContextual("from") && this.tok.type === tokTypes.string ? this.parseExprAtom() : this.dummyString();
|
|
if (elt) { node.specifiers.unshift(elt); }
|
|
}
|
|
this.semicolon();
|
|
return this.finishNode(node, "ImportDeclaration")
|
|
};
|
|
|
|
lp$1.parseImportSpecifiers = function() {
|
|
var elts = [];
|
|
if (this.tok.type === tokTypes.star) {
|
|
var elt = this.startNode();
|
|
this.next();
|
|
elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
|
|
elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
|
|
} else {
|
|
var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
|
|
this.pushCx();
|
|
this.eat(tokTypes.braceL);
|
|
if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
|
|
while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
|
|
var elt$1 = this.startNode();
|
|
if (this.eat(tokTypes.star)) {
|
|
elt$1.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
|
|
this.finishNode(elt$1, "ImportNamespaceSpecifier");
|
|
} else {
|
|
if (this.isContextual("from")) { break }
|
|
elt$1.imported = this.parseIdent();
|
|
if (isDummy(elt$1.imported)) { break }
|
|
elt$1.local = this.eatContextual("as") ? this.parseIdent() : elt$1.imported;
|
|
this.finishNode(elt$1, "ImportSpecifier");
|
|
}
|
|
elts.push(elt$1);
|
|
this.eat(tokTypes.comma);
|
|
}
|
|
this.eat(tokTypes.braceR);
|
|
this.popCx();
|
|
}
|
|
return elts
|
|
};
|
|
|
|
lp$1.parseExportSpecifierList = function() {
|
|
var elts = [];
|
|
var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
|
|
this.pushCx();
|
|
this.eat(tokTypes.braceL);
|
|
if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
|
|
while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
|
|
if (this.isContextual("from")) { break }
|
|
var elt = this.startNode();
|
|
elt.local = this.parseIdent();
|
|
if (isDummy(elt.local)) { break }
|
|
elt.exported = this.eatContextual("as") ? this.parseIdent() : elt.local;
|
|
this.finishNode(elt, "ExportSpecifier");
|
|
elts.push(elt);
|
|
this.eat(tokTypes.comma);
|
|
}
|
|
this.eat(tokTypes.braceR);
|
|
this.popCx();
|
|
return elts
|
|
};
|
|
|
|
var lp$2 = LooseParser.prototype;
|
|
|
|
lp$2.checkLVal = function(expr) {
|
|
if (!expr) { return expr }
|
|
switch (expr.type) {
|
|
case "Identifier":
|
|
case "MemberExpression":
|
|
return expr
|
|
|
|
case "ParenthesizedExpression":
|
|
expr.expression = this.checkLVal(expr.expression);
|
|
return expr
|
|
|
|
default:
|
|
return this.dummyIdent()
|
|
}
|
|
};
|
|
|
|
lp$2.parseExpression = function(noIn) {
|
|
var start = this.storeCurrentPos();
|
|
var expr = this.parseMaybeAssign(noIn);
|
|
if (this.tok.type === tokTypes.comma) {
|
|
var node = this.startNodeAt(start);
|
|
node.expressions = [expr];
|
|
while (this.eat(tokTypes.comma)) { node.expressions.push(this.parseMaybeAssign(noIn)); }
|
|
return this.finishNode(node, "SequenceExpression")
|
|
}
|
|
return expr
|
|
};
|
|
|
|
lp$2.parseParenExpression = function() {
|
|
this.pushCx();
|
|
this.expect(tokTypes.parenL);
|
|
var val = this.parseExpression();
|
|
this.popCx();
|
|
this.expect(tokTypes.parenR);
|
|
return val
|
|
};
|
|
|
|
lp$2.parseMaybeAssign = function(noIn) {
|
|
if (this.toks.isContextual("yield")) {
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== tokTypes.star && !this.tok.type.startsExpr)) {
|
|
node.delegate = false;
|
|
node.argument = null;
|
|
} else {
|
|
node.delegate = this.eat(tokTypes.star);
|
|
node.argument = this.parseMaybeAssign();
|
|
}
|
|
return this.finishNode(node, "YieldExpression")
|
|
}
|
|
|
|
var start = this.storeCurrentPos();
|
|
var left = this.parseMaybeConditional(noIn);
|
|
if (this.tok.type.isAssign) {
|
|
var node$1 = this.startNodeAt(start);
|
|
node$1.operator = this.tok.value;
|
|
node$1.left = this.tok.type === tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
|
|
this.next();
|
|
node$1.right = this.parseMaybeAssign(noIn);
|
|
return this.finishNode(node$1, "AssignmentExpression")
|
|
}
|
|
return left
|
|
};
|
|
|
|
lp$2.parseMaybeConditional = function(noIn) {
|
|
var start = this.storeCurrentPos();
|
|
var expr = this.parseExprOps(noIn);
|
|
if (this.eat(tokTypes.question)) {
|
|
var node = this.startNodeAt(start);
|
|
node.test = expr;
|
|
node.consequent = this.parseMaybeAssign();
|
|
node.alternate = this.expect(tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
|
|
return this.finishNode(node, "ConditionalExpression")
|
|
}
|
|
return expr
|
|
};
|
|
|
|
lp$2.parseExprOps = function(noIn) {
|
|
var start = this.storeCurrentPos();
|
|
var indent = this.curIndent, line = this.curLineStart;
|
|
return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
|
|
};
|
|
|
|
lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
|
|
if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left }
|
|
var prec = this.tok.type.binop;
|
|
if (prec != null && (!noIn || this.tok.type !== tokTypes._in)) {
|
|
if (prec > minPrec) {
|
|
var node = this.startNodeAt(start);
|
|
node.left = left;
|
|
node.operator = this.tok.value;
|
|
this.next();
|
|
if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) {
|
|
node.right = this.dummyIdent();
|
|
} else {
|
|
var rightStart = this.storeCurrentPos();
|
|
node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
|
|
}
|
|
this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
|
|
return this.parseExprOp(node, start, minPrec, noIn, indent, line)
|
|
}
|
|
}
|
|
return left
|
|
};
|
|
|
|
lp$2.parseMaybeUnary = function(sawUnary) {
|
|
var start = this.storeCurrentPos(), expr;
|
|
if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") &&
|
|
(this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))
|
|
) {
|
|
expr = this.parseAwait();
|
|
sawUnary = true;
|
|
} else if (this.tok.type.prefix) {
|
|
var node = this.startNode(), update = this.tok.type === tokTypes.incDec;
|
|
if (!update) { sawUnary = true; }
|
|
node.operator = this.tok.value;
|
|
node.prefix = true;
|
|
this.next();
|
|
node.argument = this.parseMaybeUnary(true);
|
|
if (update) { node.argument = this.checkLVal(node.argument); }
|
|
expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
|
|
} else if (this.tok.type === tokTypes.ellipsis) {
|
|
var node$1 = this.startNode();
|
|
this.next();
|
|
node$1.argument = this.parseMaybeUnary(sawUnary);
|
|
expr = this.finishNode(node$1, "SpreadElement");
|
|
} else {
|
|
expr = this.parseExprSubscripts();
|
|
while (this.tok.type.postfix && !this.canInsertSemicolon()) {
|
|
var node$2 = this.startNodeAt(start);
|
|
node$2.operator = this.tok.value;
|
|
node$2.prefix = false;
|
|
node$2.argument = this.checkLVal(expr);
|
|
this.next();
|
|
expr = this.finishNode(node$2, "UpdateExpression");
|
|
}
|
|
}
|
|
|
|
if (!sawUnary && this.eat(tokTypes.starstar)) {
|
|
var node$3 = this.startNodeAt(start);
|
|
node$3.operator = "**";
|
|
node$3.left = expr;
|
|
node$3.right = this.parseMaybeUnary(false);
|
|
return this.finishNode(node$3, "BinaryExpression")
|
|
}
|
|
|
|
return expr
|
|
};
|
|
|
|
lp$2.parseExprSubscripts = function() {
|
|
var start = this.storeCurrentPos();
|
|
return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
|
|
};
|
|
|
|
lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
|
|
for (;;) {
|
|
if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine()) {
|
|
if (this.tok.type === tokTypes.dot && this.curIndent === startIndent)
|
|
{ --startIndent; }
|
|
else
|
|
{ return base }
|
|
}
|
|
|
|
var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this.canInsertSemicolon();
|
|
|
|
if (this.eat(tokTypes.dot)) {
|
|
var node = this.startNodeAt(start);
|
|
node.object = base;
|
|
if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine())
|
|
{ node.property = this.dummyIdent(); }
|
|
else
|
|
{ node.property = this.parsePropertyAccessor() || this.dummyIdent(); }
|
|
node.computed = false;
|
|
base = this.finishNode(node, "MemberExpression");
|
|
} else if (this.tok.type === tokTypes.bracketL) {
|
|
this.pushCx();
|
|
this.next();
|
|
var node$1 = this.startNodeAt(start);
|
|
node$1.object = base;
|
|
node$1.property = this.parseExpression();
|
|
node$1.computed = true;
|
|
this.popCx();
|
|
this.expect(tokTypes.bracketR);
|
|
base = this.finishNode(node$1, "MemberExpression");
|
|
} else if (!noCalls && this.tok.type === tokTypes.parenL) {
|
|
var exprList = this.parseExprList(tokTypes.parenR);
|
|
if (maybeAsyncArrow && this.eat(tokTypes.arrow))
|
|
{ return this.parseArrowExpression(this.startNodeAt(start), exprList, true) }
|
|
var node$2 = this.startNodeAt(start);
|
|
node$2.callee = base;
|
|
node$2.arguments = exprList;
|
|
base = this.finishNode(node$2, "CallExpression");
|
|
} else if (this.tok.type === tokTypes.backQuote) {
|
|
var node$3 = this.startNodeAt(start);
|
|
node$3.tag = base;
|
|
node$3.quasi = this.parseTemplate();
|
|
base = this.finishNode(node$3, "TaggedTemplateExpression");
|
|
} else {
|
|
return base
|
|
}
|
|
}
|
|
};
|
|
|
|
lp$2.parseExprAtom = function() {
|
|
var node;
|
|
switch (this.tok.type) {
|
|
case tokTypes._this:
|
|
case tokTypes._super:
|
|
var type = this.tok.type === tokTypes._this ? "ThisExpression" : "Super";
|
|
node = this.startNode();
|
|
this.next();
|
|
return this.finishNode(node, type)
|
|
|
|
case tokTypes.name:
|
|
var start = this.storeCurrentPos();
|
|
var id = this.parseIdent();
|
|
var isAsync = false;
|
|
if (id.name === "async" && !this.canInsertSemicolon()) {
|
|
if (this.eat(tokTypes._function))
|
|
{ return this.parseFunction(this.startNodeAt(start), false, true) }
|
|
if (this.tok.type === tokTypes.name) {
|
|
id = this.parseIdent();
|
|
isAsync = true;
|
|
}
|
|
}
|
|
return this.eat(tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
|
|
|
|
case tokTypes.regexp:
|
|
node = this.startNode();
|
|
var val = this.tok.value;
|
|
node.regex = {pattern: val.pattern, flags: val.flags};
|
|
node.value = val.value;
|
|
node.raw = this.input.slice(this.tok.start, this.tok.end);
|
|
this.next();
|
|
return this.finishNode(node, "Literal")
|
|
|
|
case tokTypes.num: case tokTypes.string:
|
|
node = this.startNode();
|
|
node.value = this.tok.value;
|
|
node.raw = this.input.slice(this.tok.start, this.tok.end);
|
|
if (this.tok.type === tokTypes.num && node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1); }
|
|
this.next();
|
|
return this.finishNode(node, "Literal")
|
|
|
|
case tokTypes._null: case tokTypes._true: case tokTypes._false:
|
|
node = this.startNode();
|
|
node.value = this.tok.type === tokTypes._null ? null : this.tok.type === tokTypes._true;
|
|
node.raw = this.tok.type.keyword;
|
|
this.next();
|
|
return this.finishNode(node, "Literal")
|
|
|
|
case tokTypes.parenL:
|
|
var parenStart = this.storeCurrentPos();
|
|
this.next();
|
|
var inner = this.parseExpression();
|
|
this.expect(tokTypes.parenR);
|
|
if (this.eat(tokTypes.arrow)) {
|
|
// (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
|
|
var params = inner.expressions || [inner];
|
|
if (params.length && isDummy(params[params.length - 1]))
|
|
{ params.pop(); }
|
|
return this.parseArrowExpression(this.startNodeAt(parenStart), params)
|
|
}
|
|
if (this.options.preserveParens) {
|
|
var par = this.startNodeAt(parenStart);
|
|
par.expression = inner;
|
|
inner = this.finishNode(par, "ParenthesizedExpression");
|
|
}
|
|
return inner
|
|
|
|
case tokTypes.bracketL:
|
|
node = this.startNode();
|
|
node.elements = this.parseExprList(tokTypes.bracketR, true);
|
|
return this.finishNode(node, "ArrayExpression")
|
|
|
|
case tokTypes.braceL:
|
|
return this.parseObj()
|
|
|
|
case tokTypes._class:
|
|
return this.parseClass(false)
|
|
|
|
case tokTypes._function:
|
|
node = this.startNode();
|
|
this.next();
|
|
return this.parseFunction(node, false)
|
|
|
|
case tokTypes._new:
|
|
return this.parseNew()
|
|
|
|
case tokTypes.backQuote:
|
|
return this.parseTemplate()
|
|
|
|
case tokTypes._import:
|
|
if (this.options.ecmaVersion > 10) {
|
|
return this.parseDynamicImport()
|
|
} else {
|
|
return this.dummyIdent()
|
|
}
|
|
|
|
default:
|
|
return this.dummyIdent()
|
|
}
|
|
};
|
|
|
|
lp$2.parseDynamicImport = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
return this.finishNode(node, "Import")
|
|
};
|
|
|
|
lp$2.parseNew = function() {
|
|
var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
|
|
var meta = this.parseIdent(true);
|
|
if (this.options.ecmaVersion >= 6 && this.eat(tokTypes.dot)) {
|
|
node.meta = meta;
|
|
node.property = this.parseIdent(true);
|
|
return this.finishNode(node, "MetaProperty")
|
|
}
|
|
var start = this.storeCurrentPos();
|
|
node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
|
|
if (this.tok.type === tokTypes.parenL) {
|
|
node.arguments = this.parseExprList(tokTypes.parenR);
|
|
} else {
|
|
node.arguments = [];
|
|
}
|
|
return this.finishNode(node, "NewExpression")
|
|
};
|
|
|
|
lp$2.parseTemplateElement = function() {
|
|
var elem = this.startNode();
|
|
|
|
// The loose parser accepts invalid unicode escapes even in untagged templates.
|
|
if (this.tok.type === tokTypes.invalidTemplate) {
|
|
elem.value = {
|
|
raw: this.tok.value,
|
|
cooked: null
|
|
};
|
|
} else {
|
|
elem.value = {
|
|
raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
|
|
cooked: this.tok.value
|
|
};
|
|
}
|
|
this.next();
|
|
elem.tail = this.tok.type === tokTypes.backQuote;
|
|
return this.finishNode(elem, "TemplateElement")
|
|
};
|
|
|
|
lp$2.parseTemplate = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.expressions = [];
|
|
var curElt = this.parseTemplateElement();
|
|
node.quasis = [curElt];
|
|
while (!curElt.tail) {
|
|
this.next();
|
|
node.expressions.push(this.parseExpression());
|
|
if (this.expect(tokTypes.braceR)) {
|
|
curElt = this.parseTemplateElement();
|
|
} else {
|
|
curElt = this.startNode();
|
|
curElt.value = {cooked: "", raw: ""};
|
|
curElt.tail = true;
|
|
this.finishNode(curElt, "TemplateElement");
|
|
}
|
|
node.quasis.push(curElt);
|
|
}
|
|
this.expect(tokTypes.backQuote);
|
|
return this.finishNode(node, "TemplateLiteral")
|
|
};
|
|
|
|
lp$2.parseObj = function() {
|
|
var node = this.startNode();
|
|
node.properties = [];
|
|
this.pushCx();
|
|
var indent = this.curIndent + 1, line = this.curLineStart;
|
|
this.eat(tokTypes.braceL);
|
|
if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
|
|
while (!this.closes(tokTypes.braceR, indent, line)) {
|
|
var prop = this.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
|
|
if (this.options.ecmaVersion >= 9 && this.eat(tokTypes.ellipsis)) {
|
|
prop.argument = this.parseMaybeAssign();
|
|
node.properties.push(this.finishNode(prop, "SpreadElement"));
|
|
this.eat(tokTypes.comma);
|
|
continue
|
|
}
|
|
if (this.options.ecmaVersion >= 6) {
|
|
start = this.storeCurrentPos();
|
|
prop.method = false;
|
|
prop.shorthand = false;
|
|
isGenerator = this.eat(tokTypes.star);
|
|
}
|
|
this.parsePropertyName(prop);
|
|
if (this.toks.isAsyncProp(prop)) {
|
|
isAsync = true;
|
|
isGenerator = this.options.ecmaVersion >= 9 && this.eat(tokTypes.star);
|
|
this.parsePropertyName(prop);
|
|
} else {
|
|
isAsync = false;
|
|
}
|
|
if (isDummy(prop.key)) { if (isDummy(this.parseMaybeAssign())) { this.next(); } this.eat(tokTypes.comma); continue }
|
|
if (this.eat(tokTypes.colon)) {
|
|
prop.kind = "init";
|
|
prop.value = this.parseMaybeAssign();
|
|
} else if (this.options.ecmaVersion >= 6 && (this.tok.type === tokTypes.parenL || this.tok.type === tokTypes.braceL)) {
|
|
prop.kind = "init";
|
|
prop.method = true;
|
|
prop.value = this.parseMethod(isGenerator, isAsync);
|
|
} else if (this.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
|
|
!prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
|
|
(this.tok.type !== tokTypes.comma && this.tok.type !== tokTypes.braceR && this.tok.type !== tokTypes.eq)) {
|
|
prop.kind = prop.key.name;
|
|
this.parsePropertyName(prop);
|
|
prop.value = this.parseMethod(false);
|
|
} else {
|
|
prop.kind = "init";
|
|
if (this.options.ecmaVersion >= 6) {
|
|
if (this.eat(tokTypes.eq)) {
|
|
var assign = this.startNodeAt(start);
|
|
assign.operator = "=";
|
|
assign.left = prop.key;
|
|
assign.right = this.parseMaybeAssign();
|
|
prop.value = this.finishNode(assign, "AssignmentExpression");
|
|
} else {
|
|
prop.value = prop.key;
|
|
}
|
|
} else {
|
|
prop.value = this.dummyIdent();
|
|
}
|
|
prop.shorthand = true;
|
|
}
|
|
node.properties.push(this.finishNode(prop, "Property"));
|
|
this.eat(tokTypes.comma);
|
|
}
|
|
this.popCx();
|
|
if (!this.eat(tokTypes.braceR)) {
|
|
// If there is no closing brace, make the node span to the start
|
|
// of the next token (this is useful for Tern)
|
|
this.last.end = this.tok.start;
|
|
if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
|
|
}
|
|
return this.finishNode(node, "ObjectExpression")
|
|
};
|
|
|
|
lp$2.parsePropertyName = function(prop) {
|
|
if (this.options.ecmaVersion >= 6) {
|
|
if (this.eat(tokTypes.bracketL)) {
|
|
prop.computed = true;
|
|
prop.key = this.parseExpression();
|
|
this.expect(tokTypes.bracketR);
|
|
return
|
|
} else {
|
|
prop.computed = false;
|
|
}
|
|
}
|
|
var key = (this.tok.type === tokTypes.num || this.tok.type === tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
|
|
prop.key = key || this.dummyIdent();
|
|
};
|
|
|
|
lp$2.parsePropertyAccessor = function() {
|
|
if (this.tok.type === tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
|
|
};
|
|
|
|
lp$2.parseIdent = function() {
|
|
var name = this.tok.type === tokTypes.name ? this.tok.value : this.tok.type.keyword;
|
|
if (!name) { return this.dummyIdent() }
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.name = name;
|
|
return this.finishNode(node, "Identifier")
|
|
};
|
|
|
|
lp$2.initFunction = function(node) {
|
|
node.id = null;
|
|
node.params = [];
|
|
if (this.options.ecmaVersion >= 6) {
|
|
node.generator = false;
|
|
node.expression = false;
|
|
}
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = false; }
|
|
};
|
|
|
|
// Convert existing expression atom to assignable pattern
|
|
// if possible.
|
|
|
|
lp$2.toAssignable = function(node, binding) {
|
|
if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) ; else if (node.type === "ParenthesizedExpression") {
|
|
this.toAssignable(node.expression, binding);
|
|
} else if (this.options.ecmaVersion < 6) {
|
|
return this.dummyIdent()
|
|
} else if (node.type === "ObjectExpression") {
|
|
node.type = "ObjectPattern";
|
|
for (var i = 0, list = node.properties; i < list.length; i += 1)
|
|
{
|
|
var prop = list[i];
|
|
|
|
this.toAssignable(prop, binding);
|
|
}
|
|
} else if (node.type === "ArrayExpression") {
|
|
node.type = "ArrayPattern";
|
|
this.toAssignableList(node.elements, binding);
|
|
} else if (node.type === "Property") {
|
|
this.toAssignable(node.value, binding);
|
|
} else if (node.type === "SpreadElement") {
|
|
node.type = "RestElement";
|
|
this.toAssignable(node.argument, binding);
|
|
} else if (node.type === "AssignmentExpression") {
|
|
node.type = "AssignmentPattern";
|
|
delete node.operator;
|
|
} else {
|
|
return this.dummyIdent()
|
|
}
|
|
return node
|
|
};
|
|
|
|
lp$2.toAssignableList = function(exprList, binding) {
|
|
for (var i = 0, list = exprList; i < list.length; i += 1)
|
|
{
|
|
var expr = list[i];
|
|
|
|
this.toAssignable(expr, binding);
|
|
}
|
|
return exprList
|
|
};
|
|
|
|
lp$2.parseFunctionParams = function(params) {
|
|
params = this.parseExprList(tokTypes.parenR);
|
|
return this.toAssignableList(params, true)
|
|
};
|
|
|
|
lp$2.parseMethod = function(isGenerator, isAsync) {
|
|
var node = this.startNode(), oldInAsync = this.inAsync, oldInFunction = this.inFunction;
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 6)
|
|
{ node.generator = !!isGenerator; }
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = !!isAsync; }
|
|
this.inAsync = node.async;
|
|
this.inFunction = true;
|
|
node.params = this.parseFunctionParams();
|
|
node.body = this.parseBlock();
|
|
this.toks.adaptDirectivePrologue(node.body.body);
|
|
this.inAsync = oldInAsync;
|
|
this.inFunction = oldInFunction;
|
|
return this.finishNode(node, "FunctionExpression")
|
|
};
|
|
|
|
lp$2.parseArrowExpression = function(node, params, isAsync) {
|
|
var oldInAsync = this.inAsync, oldInFunction = this.inFunction;
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = !!isAsync; }
|
|
this.inAsync = node.async;
|
|
this.inFunction = true;
|
|
node.params = this.toAssignableList(params, true);
|
|
node.expression = this.tok.type !== tokTypes.braceL;
|
|
if (node.expression) {
|
|
node.body = this.parseMaybeAssign();
|
|
} else {
|
|
node.body = this.parseBlock();
|
|
this.toks.adaptDirectivePrologue(node.body.body);
|
|
}
|
|
this.inAsync = oldInAsync;
|
|
this.inFunction = oldInFunction;
|
|
return this.finishNode(node, "ArrowFunctionExpression")
|
|
};
|
|
|
|
lp$2.parseExprList = function(close, allowEmpty) {
|
|
this.pushCx();
|
|
var indent = this.curIndent, line = this.curLineStart, elts = [];
|
|
this.next(); // Opening bracket
|
|
while (!this.closes(close, indent + 1, line)) {
|
|
if (this.eat(tokTypes.comma)) {
|
|
elts.push(allowEmpty ? null : this.dummyIdent());
|
|
continue
|
|
}
|
|
var elt = this.parseMaybeAssign();
|
|
if (isDummy(elt)) {
|
|
if (this.closes(close, indent, line)) { break }
|
|
this.next();
|
|
} else {
|
|
elts.push(elt);
|
|
}
|
|
this.eat(tokTypes.comma);
|
|
}
|
|
this.popCx();
|
|
if (!this.eat(close)) {
|
|
// If there is no closing brace, make the node span to the start
|
|
// of the next token (this is useful for Tern)
|
|
this.last.end = this.tok.start;
|
|
if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
|
|
}
|
|
return elts
|
|
};
|
|
|
|
lp$2.parseAwait = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.argument = this.parseMaybeUnary();
|
|
return this.finishNode(node, "AwaitExpression")
|
|
};
|
|
|
|
// Acorn: Loose parser
|
|
|
|
defaultOptions.tabSize = 4;
|
|
|
|
function parse(input, options) {
|
|
return LooseParser.parse(input, options)
|
|
}
|
|
|
|
export { LooseParser, parse };
|