commit aedcd4e12fd2dca3b415b0019fb96962a8bad27d Author: Marijn Haverbeke Date: Mon Sep 24 10:48:45 2012 +0200 Initial import diff --git a/acorn.js b/acorn.js new file mode 100644 index 0000000000..369902c309 --- /dev/null +++ b/acorn.js @@ -0,0 +1,998 @@ +// Some regexps (identifierchars, whitespace) and error message +// strings from esprima(.org) by Ariya Hidayat. + +(function(exports) { + "strict mode"; + + exports.version = "0.0.1"; + + // State variables + + var options, input, inputLen; + var next, last; + var lastStart, lastEnd, lastCommentsAfter; + var inFunction, labels, strict; + + // PARSER + + var defaultOptions = { + ecmaVersion: 5, + strictSemicolons: false, + allowTrailingCommas: true, + forbidReserved: false, + trackComments: false, + linePositions: false + }; + + function next() { + lastStart = tokStart; + lastEnd = tokEnd; + lastCommentsAfter = tokCommentsAfter; + readToken(); + } + + function setStrict(strct) { + strict = strct; + tokPos = options.linePositions ? lastEnd.offset : lastEnd; + skipSpace(); + readToken(); + } + + function startNode() { + var node = {type: null, start: tokStart}; + if (options.trackComments && tokCommentsBefore) { + node.commentsBefore = tokCommentsBefore; + tokCommentsBefore = null; + } + return node; + } + + function startNodeFrom(other) { + var node = {type: null, start: other.start}; + if (other.commentsBefore) { + node.commentsBefore = other.commentsBefore; + other.commentsBefore = null; + } + return node; + } + + function finishNode(node, type) { + if (type != null) node.type = type; + node.end = lastEnd; + if (options.trackComments && lastCommentsAfter) + node.commentsAfter = tokCommentsAfter; + return node; + } + + exports.parse = function(inpt, opts) { + input = String(inpt); inputLen = input.length; + options = opts || {}; + for (var opt in defaultOptions) if (!options.hasOwnProperty(opt)) + options[opt] = defaultOptions[opt]; + initTokenState(); + lastStart = lastEnd = options.linePositions ? curLinePos() : tokPos; + lastCommentsAfter = inFunction = strict = null; + labels = []; + readToken(); + + var node = startNode(), first = true; + node.body = []; + while (tokType !== _eof) { + var stmt = parseStatement(); + node.body.push(stmt); + if (first && isUseStrict(stmt)) setStrict(true); + first = false; + } + return finishNode(node, "Program"); + }; + + function isUseStrict(stmt) { + return stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && + stmt.expression.value === "use strict"; + } + + function eat(type) { + if (tokType === type) { + next(); + return true; + } + } + + function canInsertSemicolon() { + return tokType === _eof || tokType === _braceR || + !options.strictSemicolons && + newline.test(options.linePositions ? input.slice(lastEnd.offset, tokStart.offset) + : input.slice(lastEnd, tokStart)); + } + + function semicolon() { + if (!eat(_semi) && !canInsertSemicolon()) unexpected(); + } + + function expect(type) { + if (tokType === type) next(); + else unexpected(); + } + + function unexpected() { + raise(tokStart, "Unexpected token"); + } + + function parseStatement() { + // if expecting a statement and found a slash as operator, + // it must be a literal regexp. + if (tokType === _slash) + readToken(true); + + var starttype = tokType, node = startNode(); + + switch (starttype) { + case _break: case _continue: + next(); + var isBreak = starttype === _break; + if (eat(_semi) || canInsertSemicolon()) node.label = null; + else if (tokType !== _name) unexpected(); + else { + node.label = parseIdent(); + semicolon(); + } + for (var i = 0; i < labels.length; ++i) { + var lab = labels[i]; + if ((node.label == null || lab.name === node.label.name) && + lab.kind != null && (isBreak || lab.kind === "loop")) break; + } + if (i === labels.length) raise(node.start, "Unsyntactic " + starttype.keyword); + return finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement"); + + case _debugger: + next(); + return finishNode(node, "DebuggerStatement"); + + case _do: + next(); + labels.push({kind: "loop"}); + node.body = parseStatement(); + labels.pop(); + expect(_while); + node.test = parseParenExpression(); + return finishNode(node, "DoWhileStatement"); + + case _for: + next(); + expect(_parenL); + if (tokType === _semi) return parseFor(node, null); + if (tokType === _var) { + var init = startNode(); + next(); + parseVar(init, true); + if (init.declarations.length === 1 && eat(_in)) + return parseForIn(node, init); + return parseFor(node, init); + } + var init = parseExpression(false, true); + if (eat(_in)) {checkLVal(init); return parseForIn(node, init);} + return parseFor(node, init); + + case _function: + next(); + return parseFunction(node, true); + + case _if: + next(); + node.test = parseParenExpression(); + node.consequent = parseStatement(); + node.alternate = eat(_else) ? parseStatement() : null; + return finishNode(node, "IfStatement"); + + case _return: + if (!inFunction) raise(tokStart, "'return' outside of function"); + next(); + if (eat(_semi) || canInsertSemicolon()) node.argument = null; + else { node.argument = parseExpression(); semicolon(); } + return finishNode(node, "ReturnStatement"); + + case _switch: + next(); + node.discriminant = parseParenExpression(); + node.lexical = false; + node.cases = []; + expect(_braceL); + labels.push({kind: "switch"}); + for (var cur, sawDefault; !eat(_braceR);) { + if (tokType === _case || tokType === _default) { + var isCase = tokType === _case; + if (cur) finishNode(cur, "SwitchCase"); + node.cases.push(cur = startNode()); + cur.consequent = []; + next(); + if (isCase) cur.test = parseExpression(); + else { + if (sawDefault) raise(lastStart, "Multiple default clauses"); sawDefault = true; + cur.test = null; + } + expect(_colon); + } else { + if (!cur) unexpected(); + cur.consequent.push(parseStatement()); + } + } + if (cur) finishNode(cur, "SwitchCase"); + labels.pop(); + return finishNode(node, "SwitchStatement"); + + case _throw: + next(); + node.argument = parseExpression(); + return finishNode(node, "ThrowStatement"); + + case _try: + next(); + node.block = parseBlock(); + node.handlers = []; + while (tokType === _catch) { + var clause = startNode(); + next(); + expect(_parenL); + clause.param = parseIdent(); + if (strict && strictBadWords.test(clause.param.name)) + raise(clause.param.start, "Binding " + clause.param.name + " in strict mode"); + expect(_parenR); + clause.guard = null; + clause.body = parseBlock(); + node.handlers.push(finishNode(clause, "CatchClause")); + } + node.finalizer = eat(_finally) ? parseBlock() : null; + if (!node.handlers.length && !node.finalizer) + raise(node.start, "Missing catch or finally clause"); + return finishNode(node, "TryStatement"); + + case _var: + next(); + node = parseVar(node); + semicolon(); + return node; + + case _while: + next(); + node.test = parseParenExpression(); + labels.push({kind: "loop"}); + node.body = parseStatement(); + labels.pop(); + return finishNode(node, "WhileStatement"); + + case _with: + if (strict) raise(tokStart, "'with' in strict mode"); + next(); + node.object = parseParenExpression(); + node.body = parseStatement(); + return finishNode(node, "WithStatement"); + + case _braceL: + return parseBlock(); + + case _semi: + next(); + return finishNode(node, "EmptyStatement"); + + default: + var maybeName = tokVal, expr = parseExpression(); + if (starttype === _name && expr.type === "Identifier" && eat(_colon)) { + for (var i = 0; i < labels.length; ++i) + if (labels[i].name === maybeName) raise(expr.start, "Label '" + maybeName + "' is already declared"); + var kind = tokType.isLoop ? "loop" : tokType === _switch ? "switch" : null; + labels.push({name: maybeName, kind: kind}); + node.body = parseStatement(); + node.label = expr; + return finishNode(node, "LabeledStatement"); + } else { + node.expression = expr; + semicolon(); + return finishNode(node, "ExpressionStatement"); + } + } + } + + function parseParenExpression() { + expect(_parenL); + var val = parseExpression(); + expect(_parenR); + return val; + } + + function parseBlock(allowStrict) { + var node = startNode(), first = true, strict = false, oldStrict; + node.body = []; + expect(_braceL); + while (!eat(_braceR)) { + var stmt = parseStatement(); + node.body.push(stmt); + if (first && isUseStrict(stmt)) { + oldStrict = strict; + setStrict(strict = true); + } + first = false + } + if (strict && !oldStrict) setStrict(false); + return finishNode(node, "BlockStatement"); + } + + function parseFor(node, init) { + node.init = init; + expect(_semi); + node.test = tokType === _semi ? null : parseExpression(); + expect(_semi); + node.update = tokType === _parenR ? null : parseExpression(); + expect(_parenR); + labels.push({kind: "loop"}); + node.body = parseStatement(); + labels.pop(); + return finishNode(node, "ForStatement"); + } + + function parseForIn(node, init) { + node.left = init; + node.right = parseExpression(); + expect(_parenR); + labels.push({kind: "loop"}); + node.body = parseStatement(); + labels.pop(); + return finishNode(node, "ForInStatement"); + } + + function parseVar(node, noIn) { + node.declarations = []; + node.kind = "var"; + for (;;) { + var decl = startNode(); + decl.id = parseIdent(); + if (strict && strictBadWords.test(decl.id.name)) + raise(id.start, "Binding " + decl.id.name + " in strict mode"); + decl.init = eat(_eq) ? parseExpression(true, noIn) : null; + node.declarations.push(finishNode(decl, "VariableDeclarator")); + if (!eat(_comma)) break; + } + return finishNode(node, "VariableDeclaration"); + } + + function parsePropertyName() { + if (tokType === _num || tokType === _string) return parseExprAtom(); + return parseIdent(true); + } + + function parseIdent(liberal) { + var node = startNode(); + if (tokType !== _name) { + if (liberal && tokType.keyword) node.name = tokType.keyword; + else unexpected(); + } else node.name = tokVal; + next(); + return finishNode(node, "Identifier"); + } + + function parseFunction(node, isStatement) { + if (tokType === _name) node.id = parseIdent(); + else if (isStatement) unexpected(); + else node.id = null; + node.params = []; + var first = true; + expect(_parenL); + while (!eat(_parenR)) { + if (!first) expect(_comma); else first = false; + node.params.push(parseIdent()); + } + + var oldInFunc = inFunction, oldLabels = labels; + inFunction = true; labels = []; + node.body = parseBlock(true); + if (strict || node.body.body.length && isUseStrict(node.body.body[0])) { + for (var i = node.id ? -1 : 0; i < node.params.length; ++i) { + var id = i < 0 ? node.id : node.params[i]; + if (strictReservedWords.test(id.name) || + strictBadWords.test(id.name)) + raise(id.start, "Defining '" + id.name + "' in strict mode"); + if (i >= 0) for (var j = 0; j < i; ++j) if (id.name === node.params[j].name) + raise(id.start, "Argument name clash in strict mode"); + } + } + + inFunction = oldInFunc; labels = oldLabels; + return finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression"); + } + + // EXPRESSION PARSING + + function parseExprList(close, allowTrailingComma, allowEmpty) { + var elts = [], first = true; + while (!eat(close)) { + if (!first) { + expect(_comma); + if (allowTrailingComma && options.allowTrailingCommas && eat(close)) break; + } else first = false; + + if (allowEmpty && tokType === _comma) elts.push(null); + else elts.push(parseExpression(true)); + } + return elts; + } + + function parseNew() { + var node = startNode(); + next(); + node.callee = parseSubscripts(parseExprAtom(false), false); + if (eat(_parenL)) node.arguments = parseExprList(_parenR, false); + else node.arguments = []; + return finishNode(node, "NewExpression"); + } + + function parseObj() { + var node = startNode(), first = true; + node.properties = []; + next(); + while (!eat(_braceR)) { + if (!first) { + expect(_comma); + if (options.allowTrailingCommas && eat(_braceR)) break; + } else first = false; + + var prop = {key: parsePropertyName()}; + if (eat(_colon)) { + prop.value = parseExpression(true); + prop.kind = "init"; + } else if (options.ecmaVersion >= 5 && prop.key.type === "Identifier" && + /^[sg]et$/.test(prop.key.name)) { + prop.kind = prop.key.name; + prop.key = parsePropertyName(); + if (!tokType === _parenL) unexpected(); + prop.value = parseFunction(startNode(), false); + } else unexpected(); + if (prop.key.type === "Identifier") for (var i = 0; i < node.properties.length; ++i) { + var other = node.properties[i]; + if (other.key.name === prop.key.name) { + var haveGetSet = /.et/.test(prop.kind) || /.et/.test(other.kind); + var haveInit = prop.kind === "init" || other.kind === "init"; + if (haveGetSet && (other.kind === prop.kind || haveInit) || + strict && prop.kind === "init" && other.kind === "init") + raise(prop.key.start, "Redefinition of property"); + } + } + node.properties.push(prop); + } + return finishNode(node, "ObjectExpression"); + } + + function parseExprAtom() { + if (tokType === _new) return parseNew(); + + switch (tokType) { + case _parenL: + next(); + var val = parseExpression(); + expect(_parenR); + return val; + + case _bracketL: + var node = startNode(); + next(); + node.elements = parseExprList(_bracketR, true, true); + return finishNode(node, "ArrayExpression"); + + case _braceL: + return parseObj(); + + case _function: + var node = startNode(); + next(); + return parseFunction(node, false); + + case _num: case _string: case _regexp: + var node = startNode(); + node.value = tokVal; + next(); + return finishNode(node, "Literal"); + + case _null: case _true: case _false: + var node = startNode(); + node.value = tokType.atomValue; + next(); + return finishNode(node, "Literal"); + + case _name: + if (tokVal === "this") { + var node = startNode(); + next(); + return finishNode(node, "ThisExpression"); + } else return parseIdent(); + + default: + unexpected(); + } + } + + function parseSubscripts(base, allowCalls) { + if (eat(_dot)) { + var node = startNodeFrom(base); + node.object = base; + node.property = parseIdent(true); + node.computed = false; + return parseSubscripts(finishNode(node, "MemberExpression"), allowCalls); + } else if (eat(_bracketL)) { + var node = startNodeFrom(base); + node.object = base; + node.property = parseExpression(); + node.computed = true; + expect(_bracketR); + return parseSubscripts(finishNode(node, "MemberExpression"), allowCalls); + } else if (allowCalls && eat(_parenL)) { + var node = startNodeFrom(base); + node.callee = base; + node.arguments = parseExprList(_parenR, false); + return parseSubscripts(finishNode(node, "CallExpression"), allowCalls); + } else return base; + } + + function parseExprSubscripts(allowCalls) { + return parseSubscripts(parseExprAtom(allowCalls), allowCalls); + } + + function parseMaybeUnary(noIn) { + if (tokType.prefix) { + var node = startNode(), update = tokType.isUpdate; + node.operator = tokVal; + node.prefix = true; + next(); + node.argument = parseMaybeUnary(noIn); + if (update) checkLVal(node.argument); + else if (strict && node.operator === "delete" && + node.argument.type === "Identifier") + raise(node.start, "Deleting local variable in strict mode"); + return finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } + var expr = parseExprSubscripts(true); + while (tokType.postfix && !canInsertSemicolon()) { + var node = startNodeFrom(expr); + node.operator = tokVal; + node.prefix = false; + node.argument = expr; + checkLVal(expr); + next(); + expr = finishNode(node, "UpdateExpression"); + } + return expr; + } + + function parseExprOp(left, minPrec, noIn) { + var prec = tokType.binop; + if (prec != null && (!noIn || tokType !== _in)) { + if (prec > minPrec) { + var node = startNodeFrom(left); + node.left = left; + node.operator = tokVal; + next(); + node.right = parseExprOp(parseMaybeUnary(noIn), prec, noIn); + var node = finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression"); + return parseExprOp(node, minPrec, noIn); + } + } + return left; + } + + function parseExprOps(noIn) { + return parseExprOp(parseMaybeUnary(noIn), -1, noIn); + } + + function parseMaybeConditional(noIn) { + var expr = parseExprOps(noIn); + if (eat(_question)) { + var node = startNodeFrom(expr); + node.test = expr; + node.consequent = parseExpression(true); + expect(_colon); + node.alternate = parseExpression(true, noIn); + return finishNode(node, "ConditionalExpression"); + } + return expr; + } + + function parseMaybeAssign(noIn) { + var left = parseMaybeConditional(noIn); + if (tokType.isAssign) { + var node = startNodeFrom(left); + node.operator = tokVal; + node.left = left; + next(); + node.right = parseMaybeAssign(noIn); + checkLVal(left); + return finishNode(node, "AssignmentExpression"); + } + return left; + } + + function parseExpression(noComma, noIn) { + var expr = parseMaybeAssign(noIn); + if (!noComma && tokType === _comma) { + var node = startNodeFrom(expr); + node.expressions = [expr]; + while (eat(_comma)) node.expressions.push(parseMaybeAssign(noIn)); + return finishNode(node, "SequenceExpression"); + } + return expr; + } + + function checkLVal(expr) { + if (!/^(?:Identifier|Member)/.test(expr.type)) + raise(expr.start, "Assigning to rvalue"); + if (strict && expr.type === "Identifier" && strictBadWords.test(expr.name)) + raise(expr.start, "Assigning to " + expr.name + " in strict mode"); + } + + // TOKENIZER DEFINITIONS + + // Token types + var _name = {type: "name"}, _eof = {type: "eof"}; + var _num = {type: "num"}, _regexp = {type: "regexp"}, _string = {type: "string"}; + + var _break = {keyword: "break"}, _case = {keyword: "case", beforeExpr: true}, _catch = {keyword: "catch"}; + var _continue = {keyword: "continue"}, _debugger = {keyword: "debugger"}, _default = {keyword: "default"}; + var _do = {keyword: "do", isLoop: true}, _else = {keyword: "else", beforeExpr: true}; + var _finally = {keyword: "finally"}, _for = {keyword: "for", isLoop: true}, _function = {keyword: "function"}; + var _if = {keyword: "if"}, _return = {keyword: "return", beforeExpr: true}, _switch = {keyword: "switch"}; + var _throw = {keyword: "throw", beforeExpr: true}, _try = {keyword: "try"}, _var = {keyword: "var"}; + var _while = {keyword: "while", isLoop: true}, _with = {keyword: "with"}, _new = {keyword: "new", beforeExpr: true}; + var _null = {keyword: "null", atomValue: null}, _true = {keyword: "true", atomValue: true}; + var _false = {keyword: "false", atomValue: false}, _in = {keyword: "in", binop: 7, beforeExpr: true}; + var keywordTypes = {"break": _break, "case": _case, "catch": _catch, + "continue": _continue, "debugger": _debugger, "default": _default, + "do": _do, "else": _else, "finally": _finally, "for": _for, + "function": _function, "if": _if, "return": _return, "switch": _switch, + "throw": _throw, "try": _try, "var": _var, "while": _while, "with": _with, + "null": _null, "true": _true, "false": _false, "new": _new, "in": _in, + "instanceof": {keyword: "instanceof", binop: 7}, + "typeof": {keyword: "typeof", prefix: true}, + "void": {keyword: "void", prefix: true}, + "delete": {keyword: "delete", prefix: true}}; + var keywords = /^(?:break|case|catch|const|continue|debugger|default|do|else|finally|for|function|if|return|switch|throw|try|var|while|with|null|true|false|instanceof|typeof|void|delete|new|in)$/; + + var _bracketL = {type: "[", beforeExpr: true}, _bracketR = {type: "]"}, _braceL = {type: "{", beforeExpr: true}, _braceR = {type: "}"}, _parenL = {type: "(", beforeExpr: true}, _parenR = {type: ")"}, _comma = {type: ",", beforeExpr: true}, _semi = {type: ";", beforeExpr: true}, _colon = {type: ":", beforeExpr: true}, _dot = {type: "."}, _question = {type: "?", beforeExpr: true}; + var puncTypes = {"[": _bracketL, "]": _bracketR, "{": _braceL, "}": _braceR, "(": _parenL, + ")": _parenR, ",": _comma, ";": _semi, ":": _colon, ".": _dot, "?": _question}; + var puncChars = /[\[\]\{\}\(\),;:\.\?]/; + + var _slash = {binop: 10, beforeExpr: true}, _eq = {isAssign: true, beforeExpr: true}; + var opTypes = {"/": _slash, "=": _eq}; + opTypes["+"] = opTypes["-"] = {binop: 9, prefix: true, beforeExpr: true}; + opTypes["++"] = opTypes["--"] = {postfix: true, prefix: true, isUpdate: true}; + opTypes["~"] = opTypes["!"] = {prefix: true, beforeExpr: true}; + var binopPrecs = [1, "||", 2, "&&", 3, "|", 4, "^", 5, "&", 6, "==", "===", "!=", "!==", + 7, "<", ">", "<=", ">=", 8, ">>", "<<", ">>>", 10, "*", "%"]; + for (var i = 0, curPrec; i < binopPrecs.length; ++i) + if (typeof binopPrecs[i] === "number") curPrec = binopPrecs[i]; + else opTypes[binopPrecs[i]] = {binop: curPrec, beforeExpr: true}; + var assignOps = ["+=", "-=", "/=", "*=", "%=", ">>=", ">>>=", "<<=", "|=", "^=", "&="]; + for (var i = 0, typeObj = {isAssign: true, beforeExpr: true}; i < assignOps.length; ++i) + opTypes[assignOps[i]] = typeObj; + + var reservedWords3 = /^(?:abstract|boolean|byte|char|class|double|enum|export|extends|final|float|goto|implements|import|int|interface|long|native|package|private|protected|public|short|static|super|synchronized|throws|transient|volatile)$/; + var reservedWords5 = /^(?:class|enum|extends|super|const|export|import)$/; + var strictReservedWords = /^(?:implements|interface|let|package|private|protected|public|static|yield)$/; + var strictBadWords = /^(?:eval|arguments)$/; + + // CHARACTER CATEGORIES + + var operatorChar = /[+\-\*\/&%=<>!|~^]/; + var reModifiers = /^[gmsiy]*$/; + + var nonASCIIwhitespace = /[\u1680\u180E\u2000-\u200A\u202F\u205F\u3000\uFEFF]/; + var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0\u08a2-\u08ac\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097f\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191c\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2e2f\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua697\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa80-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"; + var nonASCIIidentifierChars = "\u0371-\u0374\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u0620-\u0649\u0672-\u06d3\u06e7-\u06e8\u06fb-\u06fc\u0730-\u074a\u0800-\u0814\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0840-\u0857\u08e4-\u08fe\u0900-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962-\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09d7\u09df-\u09e0\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2-\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b5f-\u0b60\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c01-\u0c03\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62-\u0c63\u0c66-\u0c6f\u0c82\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2-\u0ce3\u0ce6-\u0cef\u0d02\u0d03\u0d46-\u0d48\u0d57\u0d62-\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0df2\u0df3\u0e34-\u0e3a\u0e40-\u0e45\u0e50-\u0e59\u0eb4-\u0eb9\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f41-\u0f47\u0f71-\u0f84\u0f86-\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u1000-\u1029\u1040-\u1049\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u170e-\u1710\u1720-\u1730\u1740-\u1750\u1772\u1773\u1780-\u17b2\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u1920-\u192b\u1930-\u193b\u1951-\u196d\u19b0-\u19c0\u19c8-\u19c9\u19d0-\u19d9\u1a00-\u1a15\u1a20-\u1a53\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1b46-\u1b4b\u1b50-\u1b59\u1b6b-\u1b73\u1bb0-\u1bb9\u1be6-\u1bf3\u1c00-\u1c22\u1c40-\u1c49\u1c5b-\u1c7d\u1cd0-\u1cd2\u1d00-\u1dbe\u1e01-\u1f15\u200c\u200d\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2d81-\u2d96\u2de0-\u2dff\u3021-\u3028\u3099\u309a\ua640-\ua66d\ua674-\ua67d\ua69f\ua6f0-\ua6f1\ua7f8-\ua800\ua806\ua80b\ua823-\ua827\ua880-\ua881\ua8b4-\ua8c4\ua8d0-\ua8d9\ua8f3-\ua8f7\ua900-\ua909\ua926-\ua92d\ua930-\ua945\ua980-\ua983\ua9b3-\ua9c0\uaa00-\uaa27\uaa40-\uaa41\uaa4c-\uaa4d\uaa50-\uaa59\uaa7b\uaae0-\uaae9\uaaf2-\uaaf3\uabc0-\uabe1\uabec\uabed\uabf0-\uabf9\ufb20-\ufb28\ufe00-\ufe0f\ufe20-\ufe26\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"; + var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]"); + var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]"); + var identifierStart = /[a-zA-Z_$]/, identifier = /[a-zA-Z_$0-9]+/, identifierG = /[a-zA-Z_$0-9]+/g + var digit = /\d/, sign = /[-+]/; + var newline = /[\n\r\u2028\u2029]/; + var lineBreak = /\r\n?|[\n\r\u2028\u2029]/g; + + // TOKENIZER STATE + + var tokStart, tokEnd, tokType, tokVal, tokCommentsBefore, tokCommentsAfter; + + var tokPos, tokRegexpAllowed, tokComments; + var tokCurLine, tokLineStart, tokLineStartNext; + + function nextLineStart() { + lineBreak.lastIndex = tokLineStart; + var match = lineBreak.exec(input); + return match ? match.index + match[0].length : input.length + 1; + } + + function curLinePos() { + while (tokLineStartNext <= tokPos) { + ++tokCurLine; + tokLineStart = tokLineStartNext; + tokLineStartNext = nextLineStart(); + } + return {offset: tokPos, line: tokCurLine, column: tokPos - tokLineStart}; + } + + function initTokenState() { + tokCurLine = 1; + tokPos = tokLineStart = 0; + tokLineStartNext = nextLineStart(); + tokRegexpAllowed = true; + tokComments = null; + skipSpace(); + } + + function finishToken(type, val) { + tokEnd = options.linePositions ? curLinePos() : tokPos; + tokType = type; + skipSpace(); + tokVal = val; + tokCommentsAfter = tokComments; + tokRegexpAllowed = type.beforeExpr; + } + + var getLineInfo = exports.getLineInfo = function(input, pos) { + for (var line = 1, cur = 0;;) { + lineBreak.lastIndex = cur; + var match = lineBreak.exec(input); + if (match && match.index < pos) { + ++line; + cur = match.index + match[0].length; + } else break; + } + return {line: line, column: pos - cur}; + }; + + function readBlockComment() { + var end = input.indexOf("*/", tokPos += 2); + if (end === -1) raise(tokPos - 2, "Unterminated comment"); + if (options.trackComments) + (tokComments || (tokComments = [])).push(input.slice(tokPos, end)); + tokPos = end + 2; + } + + function readLineComment() { + var start = tokPos; + tokPos += 2; + while (tokPos < inputLen && !newline.test(input.charAt(tokPos))) ++tokPos; + if (options.trackComments) + (tokComments || (tokComments = [])).push(input.slice(start, tokPos)); + } + + function skipSpace() { + tokComments = null; + while (tokPos < inputLen) { + var ch = input.charAt(tokPos); + if (ch === "/") { + var nextCh = input.charAt(tokPos+1); + if (nextCh === "*") { + readBlockComment(); + } else if (nextCh === "/") { + readLineComment(); + } else break; + } else if (ch === " " || ch === '\t' || ch === "\n" || ch === "\r" || ch === "\f" || + ch === "\xa0" || ch === "\x0b" || (ch >= "\u1680" && nonASCIIwhitespace.test(ch))) { + ++tokPos; + } else { + break; + } + } + } + + // TOKENIZER READING + + function readToken(forceRegexp) { + tokStart = options.linePositions ? curLinePos() : tokPos; + tokCommentsBefore = tokComments; + if (forceRegexp) return readRegexp(); + if (tokPos >= inputLen) return finishToken(_eof); + + var ch = input.charAt(tokPos), next; + if (identifierStart.test(ch)) return readWord(); + if (ch === "." && digit.test(input.charAt(tokPos+1))) return readNumber(ch); + if (puncChars.test(ch)) {++tokPos; return finishToken(puncTypes[ch], null);} + if (digit.test(ch)) { + var nextCh = input.charAt(tokPos+1); + if (ch === "0" && nextCh === "x" || nextCh === "X") return readHexNumber(); + else return readNumber(ch); + } + if (ch === '"' || ch === "'") return readString(ch); + if (ch === "/" && tokRegexpAllowed) {++tokPos; return readRegexp();} + if (operatorChar.test(ch)) return readOperator(ch); + if (ch === "\\" || nonASCIIidentifierStart.test(ch)) return readWord(true); + raise(tokPos, "Unexpected character '" + ch + "'"); + } + + function readRegexp() { + var content = "", escaped, inClass, start = tokPos; + for (;;) { + if (tokPos >= inputLen) raise(start, "Unterminated regular expression"); + var ch = input.charAt(tokPos); + if (newline.test(ch)) raise(start, "Unterminated regular expression"); + if (!escaped) { + if (ch === "[") inClass = true; + else if (ch === "]" && inClass) inClass = false; + else if (ch === "/" && !inClass) break; + escaped = ch === "\\"; + } else escaped = false; + ++tokPos; + } + var content = input.slice(start, tokPos); + ++tokPos; + var mods = readWord1(true); + if (!reModifiers.test(mods)) raise(start, "Invalid regexp flag"); + return finishToken(_regexp, new RegExp(content, mods)); + } + + function readInt(radix, len) { + var start = tokPos, total = 0; + for (;;) { + var code = input.charCodeAt(tokPos), val; + if (code >= 97) val = code - 97 + 10; // a + else if (code >= 65) val = code - 65 + 10; // A + else if (code >= 48 && code <= 57) val = code - 48; // 0-9 + else val = Infinity; + if (val >= radix) break; + ++tokPos; + total = total * radix + val; + } + if (tokPos === start || len != null && tokPos - start !== len) return null; + + return total; + } + + function readHexNumber() { + tokPos += 2; // 0x + var val = readInt(16); + if (val == null) raise(tokStart + 2, "Expected hexadecimal number"); + if (identifierStart.test(input.charAt(tokPos))) raise(tokPos, "Identifier directly after number"); + return finishToken(_num, val); + } + + function readNumber(ch) { + var start = tokPos, isFloat = ch === "."; + if (!isFloat && readInt(10) == null) raise(start, "Invalid number"); + if (isFloat || input.charAt(tokPos) === ".") { + if (sign.test(input.charAt(++tokPos))) ++tokPos; + if (readInt(10) == null) raise(start, "Invalid number"); + isFloat = true; + } + if (/e/i.test(input.charAt(tokPos))) { + if (sign.test(input.charAt(++tokPos))) ++tokPos; + if (readInt(10) == null) raise(start, "Invalid number") + isFloat = true; + } + if (identifierStart.test(input.charAt(tokPos))) raise(tokPos, "Identifier directly after number"); + + var str = input.slice(start, tokPos), val; + if (isFloat) val = parseFloat(str); + else if (ch !== "0") val = parseInt(str, 10); + else if (/[89]/.test(str) || strict) raise(start, "Invalid number"); + else val = parseInt(str, 8); + return finishToken(_num, val); + } + + function readString(quote) { + tokPos++; + var escaped, str = ""; + for (;;) { + if (tokPos >= inputLen) raise(tokStart, "Unterminated string constant"); + var ch = input.charAt(tokPos); + if (ch === quote && !escaped) { + ++tokPos; + return finishToken(_string, str); + } + if (escaped) { + var octal = /^[0-7]+/.exec(input.slice(tokPos, tokPos + 3)); + if (octal) octal = octal[0]; + while (octal && parseInt(octal, 8) > 255) octal = octal.slice(0, octal.length - 1); + if (octal) { + if (strict) raise(tokPos - 1, "Octal literal in strict mode"); + str += String.fromCharCode(parseInt(octal, 8)); + tokPos += octal.length; + } else if (ch === "x") { + ++tokPos; + str += readHexChar(2); + } else if (ch === "u") { + ++tokPos; + str += readHexChar(4); + } else if (ch === "U") { + ++tokPos; + str += readHexChar(8); + } else { + ++tokPos; + switch (ch) { + case "n" : str += "\n"; break; + case "r" : str += "\r"; break; + case "t" : str += "\t"; break; + case "b" : str += "\b"; break; + case "v" : str += "\u000b"; break; + case "f" : str += "\f"; break; + case "0" : str += "\0"; break; + case "\r": if (input.charAt(tokPos) === "\n") ++tokPos; + case "\n": break; + default: str += ch; break; + } + } + escaped = false; + } else { + if (newline.test(ch)) raise(tokStart, "Unterminated string constant"); + if (ch !== "\\") str += ch; + ++tokPos; + escaped = ch === "\\"; + } + } + } + + function readHexChar(len) { + var n = readInt(16, len); + if (n == null) raise(tokStart, "Bad character escape sequence"); + return String.fromCharCode(n); + } + + function readOperator(op) { + for (;;) { + var ch = input.charAt(++tokPos), nextOp; + if (!operatorChar.test(ch) || !opTypes.hasOwnProperty(nextOp = op + ch)) break; + op = nextOp; + } + return finishToken(opTypes[op], op); + } + + var containsEsc; + function readWord1(startSpecial) { + containsEsc = false; + var word, first, escaped; + if (startSpecial) { + word = ""; first = true; + } else { + identifierG.lastIndex = tokPos; + word = identifierG.exec(input)[0]; + tokPos += word.length; + var code = input.charCodeAt(tokPos); + if (code < 256 && code !== 92) return word; + } + for (;;) { + var ch = input.charAt(tokPos); + if (!escaped) { + if (ch === "\\") {} + else if ((ch <= "\xff" ? identifier : nonASCIIidentifier).test(ch)) word += ch; + else break; + ++tokPos; + } else { + if (ch !== "u") raise(tokPos, "Expecting Unicode escape sequence \\uXXXX"); + ++tokPos; + var esc = readHexChar(4); + if (!esc) raise(tokPos - 1, "Invalid Unicode escape"); + var re = esc <= "\xff" ? (first ? identifier : identifierStart) + : (first ? nonASCIIidentifier : nonASCIIidentifierStart); + if (!re.test(esc)) raise(tokPos - 4, "Invalid Unicode escape"); + word += esc; + } + escaped = ch === "\\"; + if (escaped) containsEsc = true; + first = false; + } + return word; + } + + function readWord(startSpecial) { + var word = readWord1(startSpecial); + var type = _name; + if (!containsEsc) { + if (keywords.test(word)) type = keywordTypes[word]; + else if (options.forbidReserved && + (options.ecmaVersion === 3 ? reservedWords3 : reservedWords5).test(word) || + strict && strictReservedWords.test(word)) + raise(tokStart, "The keyword '" + word + "' is reserved"); + } + return finishToken(type, word); + } + + function raise(pos, message) { + if (typeof pos == "number") pos = getLineInfo(input, pos); + message += " (" + pos.line + ":" + pos.column + ")"; + throw new SyntaxError(message); + } + +})(typeof exports === "undefined" ? (window.acorn = {}) : exports);