mirror of
https://github.com/jashkenas/coffeescript.git
synced 2022-11-09 12:23:24 -05:00
623 lines
20 KiB
JavaScript
623 lines
20 KiB
JavaScript
(function() {
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var ASSIGNED, CALLABLE, CODE, COFFEE_ALIASES, COFFEE_KEYWORDS, COMMENT, CONVERSIONS, HEREDOC, HEREDOC_INDENT, IDENTIFIER, INTERPOLATION, JS_CLEANER, JS_FORBIDDEN, JS_KEYWORDS, LAST_DENT, LAST_DENTS, LINE_BREAK, Lexer, MULTILINER, MULTI_DENT, NEXT_CHARACTER, NOT_REGEX, NO_NEWLINE, NUMBER, OPERATOR, REGEX_END, REGEX_ESCAPE, REGEX_INTERPOLATION, REGEX_START, RESERVED, Rewriter, STRING_NEWLINES, WHITESPACE, _a, _b, _c, compact, count, helpers, include, starts;
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var __slice = Array.prototype.slice;
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if (typeof process !== "undefined" && process !== null) {
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_a = require('./rewriter');
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Rewriter = _a.Rewriter;
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_b = require('./helpers');
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helpers = _b.helpers;
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} else {
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this.exports = this;
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Rewriter = this.Rewriter;
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helpers = this.helpers;
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}
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_c = helpers;
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include = _c.include;
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count = _c.count;
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starts = _c.starts;
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compact = _c.compact;
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exports.Lexer = (function() {
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Lexer = function() {};
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Lexer.prototype.tokenize = function(code, options) {
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var o;
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code = code.replace(/(\r|\s+$)/g, '');
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o = options || {};
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this.code = code;
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this.i = 0;
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this.line = o.line || 0;
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this.indent = 0;
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this.outdebt = 0;
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this.indents = [];
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this.tokens = [];
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while (this.i < this.code.length) {
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this.chunk = this.code.slice(this.i);
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this.extractNextToken();
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}
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this.closeIndentation();
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if (o.rewrite === false) {
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return this.tokens;
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}
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return (new Rewriter()).rewrite(this.tokens);
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};
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Lexer.prototype.extractNextToken = function() {
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if (this.identifierToken()) {
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return null;
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}
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if (this.commentToken()) {
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return null;
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}
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if (this.whitespaceToken()) {
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return null;
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}
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if (this.lineToken()) {
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return null;
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}
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if (this.heredocToken()) {
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return null;
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}
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if (this.stringToken()) {
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return null;
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}
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if (this.numberToken()) {
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return null;
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}
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if (this.regexToken()) {
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return null;
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}
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if (this.jsToken()) {
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return null;
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}
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return this.literalToken();
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};
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Lexer.prototype.identifierToken = function() {
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var close_index, forcedIdentifier, id, tag;
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if (!(id = this.match(IDENTIFIER, 1))) {
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return false;
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}
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this.i += id.length;
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forcedIdentifier = this.tagAccessor() || this.match(ASSIGNED, 1);
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tag = 'IDENTIFIER';
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if (include(JS_KEYWORDS, id) || (!forcedIdentifier && include(COFFEE_KEYWORDS, id))) {
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tag = id.toUpperCase();
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}
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if (tag === 'WHEN' && include(LINE_BREAK, this.tag())) {
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tag = 'LEADING_WHEN';
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}
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if (id === 'all' && this.tag() === 'FOR') {
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tag = 'ALL';
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}
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if (include(JS_FORBIDDEN, id)) {
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if (forcedIdentifier) {
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tag = 'STRING';
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id = ("\"" + id + "\"");
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if (forcedIdentifier === 'accessor') {
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close_index = true;
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if (this.tag() !== '@') {
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this.tokens.pop();
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}
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this.token('INDEX_START', '[');
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}
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} else if (include(RESERVED, id)) {
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this.identifierError(id);
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}
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}
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if (!(forcedIdentifier)) {
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if (include(COFFEE_ALIASES, id)) {
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tag = (id = CONVERSIONS[id]);
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}
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}
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this.token(tag, id);
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if (close_index) {
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this.token(']', ']');
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}
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return true;
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};
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Lexer.prototype.numberToken = function() {
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var number;
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if (!(number = this.match(NUMBER, 1))) {
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return false;
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}
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if (this.tag() === '.' && starts(number, '.')) {
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return false;
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}
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this.i += number.length;
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this.token('NUMBER', number);
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return true;
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};
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Lexer.prototype.stringToken = function() {
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var string;
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if (!(starts(this.chunk, '"') || starts(this.chunk, "'"))) {
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return false;
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}
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if (!(string = this.balancedToken(['"', '"'], ['#{', '}']) || this.balancedToken(["'", "'"]))) {
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return false;
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}
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this.interpolateString(string.replace(STRING_NEWLINES, " \\\n"));
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this.line += count(string, "\n");
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this.i += string.length;
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return true;
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};
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Lexer.prototype.heredocToken = function() {
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var doc, match, quote;
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if (!(match = this.chunk.match(HEREDOC))) {
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return false;
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}
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quote = match[1].substr(0, 1);
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doc = this.sanitizeHeredoc(match[2] || match[4], {
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quote: quote
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});
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this.interpolateString(("" + quote + doc + quote), {
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heredoc: true
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});
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this.line += count(match[1], "\n");
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this.i += match[1].length;
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return true;
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};
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Lexer.prototype.commentToken = function() {
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var comment, match;
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if (!(match = this.chunk.match(COMMENT))) {
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return false;
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}
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this.line += count(match[1], "\n");
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this.i += match[1].length;
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if (match[2]) {
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comment = this.sanitizeHeredoc(match[2], {
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herecomment: true
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});
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this.token('HERECOMMENT', comment.split(MULTILINER));
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this.token('TERMINATOR', '\n');
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}
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return true;
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};
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Lexer.prototype.jsToken = function() {
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var script;
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if (!(starts(this.chunk, '`'))) {
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return false;
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}
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if (!(script = this.balancedToken(['`', '`']))) {
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return false;
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}
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this.token('JS', script.replace(JS_CLEANER, ''));
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this.i += script.length;
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return true;
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};
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Lexer.prototype.regexToken = function() {
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var end, flags, regex, str;
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if (!(this.chunk.match(REGEX_START))) {
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return false;
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}
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if (include(NOT_REGEX, this.tag())) {
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return false;
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}
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if (!(regex = this.balancedToken(['/', '/']))) {
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return false;
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}
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if (!(end = this.chunk.substr(regex.length).match(REGEX_END))) {
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return false;
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}
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if (end[2]) {
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regex += (flags = end[2]);
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}
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if (regex.match(REGEX_INTERPOLATION)) {
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str = regex.substring(1).split('/')[0];
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str = str.replace(REGEX_ESCAPE, function(escaped) {
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return '\\' + escaped;
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});
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this.tokens = this.tokens.concat([['(', '('], ['NEW', 'new'], ['IDENTIFIER', 'RegExp'], ['CALL_START', '(']]);
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this.interpolateString(("\"" + str + "\""), {
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escapeQuotes: true
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});
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if (flags) {
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this.tokens.splice(this.tokens.length, 0, [',', ','], ['STRING', ("\"" + flags + "\"")]);
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}
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this.tokens.splice(this.tokens.length, 0, [')', ')'], [')', ')']);
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} else {
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this.token('REGEX', regex);
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}
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this.i += regex.length;
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return true;
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};
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Lexer.prototype.balancedToken = function() {
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var delimited;
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delimited = __slice.call(arguments, 0);
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return this.balancedString(this.chunk, delimited);
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};
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Lexer.prototype.lineToken = function() {
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var diff, indent, nextCharacter, noNewlines, prev, size;
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if (!(indent = this.match(MULTI_DENT, 1))) {
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return false;
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}
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this.line += count(indent, "\n");
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this.i += indent.length;
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prev = this.prev(2);
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size = indent.match(LAST_DENTS).reverse()[0].match(LAST_DENT)[1].length;
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nextCharacter = this.match(NEXT_CHARACTER, 1);
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noNewlines = nextCharacter === '.' || nextCharacter === ',' || this.unfinished();
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if (size === this.indent) {
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if (noNewlines) {
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return this.suppressNewlines();
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}
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return this.newlineToken(indent);
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} else if (size > this.indent) {
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if (noNewlines) {
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return this.suppressNewlines();
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}
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this.outdebt = 0;
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diff = size - this.indent;
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this.token('INDENT', diff);
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this.indents.push(diff);
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} else {
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this.outdentToken(this.indent - size, noNewlines);
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}
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this.indent = size;
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return true;
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};
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Lexer.prototype.outdentToken = function(moveOut, noNewlines, close) {
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var dent, len;
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while (moveOut > 0) {
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len = this.indents.length - 1;
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if (this.indents[len] === undefined) {
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moveOut = 0;
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} else if (this.indents[len] === this.outdebt) {
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moveOut -= this.outdebt;
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this.outdebt = 0;
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} else if (this.indents[len] < this.outdebt) {
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this.outdebt -= this.indents[len];
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moveOut -= this.indents[len];
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} else {
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dent = this.indents.pop();
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dent -= this.outdebt;
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moveOut -= dent;
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this.outdebt = 0;
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this.token('OUTDENT', dent);
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}
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}
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if (dent) {
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this.outdebt -= moveOut;
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}
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if (!(this.tag() === 'TERMINATOR' || noNewlines)) {
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this.token('TERMINATOR', "\n");
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}
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return true;
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};
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Lexer.prototype.whitespaceToken = function() {
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var prev, space;
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if (!(space = this.match(WHITESPACE, 1))) {
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return false;
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}
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prev = this.prev();
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if (prev) {
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prev.spaced = true;
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}
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this.i += space.length;
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return true;
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};
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Lexer.prototype.newlineToken = function(newlines) {
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if (!(this.tag() === 'TERMINATOR')) {
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this.token('TERMINATOR', "\n");
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}
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return true;
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};
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Lexer.prototype.suppressNewlines = function() {
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if (this.value() === "\\") {
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this.tokens.pop();
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}
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return true;
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};
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Lexer.prototype.literalToken = function() {
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var _d, match, prevSpaced, space, tag, value;
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match = this.chunk.match(OPERATOR);
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value = match && match[1];
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space = match && match[2];
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if (value && value.match(CODE)) {
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this.tagParameters();
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}
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value = value || this.chunk.substr(0, 1);
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this.i += value.length;
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prevSpaced = this.prev() && this.prev().spaced;
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tag = value;
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if (value === '=') {
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if (include(JS_FORBIDDEN, this.value())) {
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this.assignmentError();
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}
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if (('or' === (_d = this.value()) || 'and' === _d)) {
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return this.tag(1, CONVERSIONS[this.value()] + '=');
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}
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}
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if (value === ';') {
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tag = 'TERMINATOR';
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} else if (value === '?' && prevSpaced) {
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tag = 'OP?';
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} else if (include(CALLABLE, this.tag()) && !prevSpaced) {
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if (value === '(') {
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tag = 'CALL_START';
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} else if (value === '[') {
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tag = 'INDEX_START';
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if (this.tag() === '?') {
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this.tag(1, 'INDEX_SOAK');
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}
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if (this.tag() === '::') {
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this.tag(1, 'INDEX_PROTO');
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}
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}
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}
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this.token(tag, value);
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return true;
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};
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Lexer.prototype.tagAccessor = function() {
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var accessor, prev;
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if ((!(prev = this.prev())) || (prev && prev.spaced)) {
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return false;
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}
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accessor = (function() {
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if (prev[1] === '::') {
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return this.tag(1, 'PROTOTYPE_ACCESS');
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} else if (prev[1] === '.' && !(this.value(2) === '.')) {
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if (this.tag(2) === '?') {
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this.tag(1, 'SOAK_ACCESS');
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return this.tokens.splice(-2, 1);
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} else {
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return this.tag(1, 'PROPERTY_ACCESS');
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}
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} else {
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return prev[0] === '@';
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}
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}).call(this);
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return accessor ? 'accessor' : false;
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};
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Lexer.prototype.sanitizeHeredoc = function(doc, options) {
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var _d, attempt, indent, match;
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while ((match = HEREDOC_INDENT.exec(doc))) {
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attempt = (typeof (_d = match[2]) !== "undefined" && _d !== null) ? match[2] : match[3];
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if (!indent || attempt.length < indent.length) {
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indent = attempt;
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}
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}
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doc = doc.replace(new RegExp("^" + indent, 'gm'), '');
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if (options.herecomment) {
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return doc;
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}
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return doc.replace(MULTILINER, "\\n").replace(new RegExp(options.quote, 'g'), ("\\" + options.quote));
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};
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Lexer.prototype.tagParameters = function() {
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var _d, i, tok;
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if (this.tag() !== ')') {
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return null;
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}
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i = 0;
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while (true) {
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i += 1;
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tok = this.prev(i);
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if (!tok) {
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return null;
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}
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if ((_d = tok[0]) === 'IDENTIFIER') {
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tok[0] = 'PARAM';
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} else if (_d === ')') {
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tok[0] = 'PARAM_END';
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} else if (_d === '(' || _d === 'CALL_START') {
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return (tok[0] = 'PARAM_START');
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}
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}
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return true;
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};
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Lexer.prototype.closeIndentation = function() {
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return this.outdentToken(this.indent);
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};
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Lexer.prototype.identifierError = function(word) {
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throw new Error(("SyntaxError: Reserved word \"" + word + "\" on line " + (this.line + 1)));
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};
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Lexer.prototype.assignmentError = function() {
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throw new Error(("SyntaxError: Reserved word \"" + (this.value()) + "\" on line " + (this.line + 1) + " can't be assigned"));
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};
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Lexer.prototype.balancedString = function(str, delimited, options) {
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var _d, _e, _f, _g, close, i, levels, open, pair, slash;
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options = options || {};
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slash = delimited[0][0] === '/';
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levels = [];
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i = 0;
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while (i < str.length) {
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if (levels.length && starts(str, '\\', i)) {
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i += 1;
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} else {
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_e = delimited;
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for (_d = 0, _f = _e.length; _d < _f; _d++) {
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pair = _e[_d];
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_g = pair;
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open = _g[0];
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close = _g[1];
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if (levels.length && starts(str, close, i) && levels[levels.length - 1] === pair) {
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levels.pop();
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i += close.length - 1;
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if (!(levels.length)) {
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i += 1;
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}
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break;
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} else if (starts(str, open, i)) {
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levels.push(pair);
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i += open.length - 1;
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break;
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}
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}
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}
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if (!levels.length || slash && starts(str, '\n', i)) {
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break;
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}
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i += 1;
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}
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if (levels.length) {
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if (slash) {
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return false;
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}
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throw new Error(("SyntaxError: Unterminated " + (levels.pop()[0]) + " starting on line " + (this.line + 1)));
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}
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return !i ? false : str.substring(0, i);
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};
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Lexer.prototype.interpolateString = function(str, options) {
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var _d, _e, _f, _g, _h, _i, _j, escaped, expr, group, i, idx, inner, interp, interpolated, lexer, match, nested, pi, quote, tag, tok, token, tokens, value;
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options = options || {};
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if (str.length < 3 || !starts(str, '"')) {
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return this.token('STRING', str);
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} else {
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lexer = new Lexer();
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tokens = [];
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quote = str.substring(0, 1);
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_d = [1, 1];
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i = _d[0];
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pi = _d[1];
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while (i < str.length - 1) {
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if (starts(str, '\\', i)) {
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i += 1;
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} else if ((match = str.substring(i).match(INTERPOLATION))) {
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_e = match;
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group = _e[0];
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interp = _e[1];
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if (starts(interp, '@')) {
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interp = ("this." + (interp.substring(1)));
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}
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if (pi < i) {
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tokens.push(['STRING', ("" + quote + (str.substring(pi, i)) + quote)]);
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}
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tokens.push(['IDENTIFIER', interp]);
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i += group.length - 1;
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pi = i + 1;
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} else if ((expr = this.balancedString(str.substring(i), [['#{', '}']]))) {
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if (pi < i) {
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tokens.push(['STRING', ("" + quote + (str.substring(pi, i)) + quote)]);
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}
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inner = expr.substring(2, expr.length - 1);
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if (inner.length) {
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if (options.heredoc) {
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inner = inner.replace(new RegExp('\\\\' + quote, 'g'), quote);
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}
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nested = lexer.tokenize(("(" + inner + ")"), {
|
|
line: this.line
|
|
});
|
|
_f = nested;
|
|
for (idx = 0, _g = _f.length; idx < _g; idx++) {
|
|
tok = _f[idx];
|
|
tok[0] === 'CALL_END' ? (tok[0] = ')') : null;
|
|
}
|
|
nested.pop();
|
|
tokens.push(['TOKENS', nested]);
|
|
} else {
|
|
tokens.push(['STRING', ("" + quote + quote)]);
|
|
}
|
|
i += expr.length - 1;
|
|
pi = i + 1;
|
|
}
|
|
i += 1;
|
|
}
|
|
if (pi < i && pi < str.length - 1) {
|
|
tokens.push(['STRING', ("" + quote + (str.substring(pi, i)) + quote)]);
|
|
}
|
|
if (!(tokens[0][0] === 'STRING')) {
|
|
tokens.unshift(['STRING', '""']);
|
|
}
|
|
interpolated = tokens.length > 1;
|
|
if (interpolated) {
|
|
this.token('(', '(');
|
|
}
|
|
_h = tokens;
|
|
for (i = 0, _i = _h.length; i < _i; i++) {
|
|
token = _h[i];
|
|
_j = token;
|
|
tag = _j[0];
|
|
value = _j[1];
|
|
if (tag === 'TOKENS') {
|
|
this.tokens = this.tokens.concat(value);
|
|
} else if (tag === 'STRING' && options.escapeQuotes) {
|
|
escaped = value.substring(1, value.length - 1).replace(/"/g, '\\"');
|
|
this.token(tag, ("\"" + escaped + "\""));
|
|
} else {
|
|
this.token(tag, value);
|
|
}
|
|
if (i < tokens.length - 1) {
|
|
this.token('+', '+');
|
|
}
|
|
}
|
|
if (interpolated) {
|
|
this.token(')', ')');
|
|
}
|
|
return tokens;
|
|
}
|
|
};
|
|
Lexer.prototype.token = function(tag, value) {
|
|
return this.tokens.push([tag, value, this.line]);
|
|
};
|
|
Lexer.prototype.tag = function(index, newTag) {
|
|
var tok;
|
|
if (!(tok = this.prev(index))) {
|
|
return null;
|
|
}
|
|
if (typeof newTag !== "undefined" && newTag !== null) {
|
|
return (tok[0] = newTag);
|
|
}
|
|
return tok[0];
|
|
};
|
|
Lexer.prototype.value = function(index, val) {
|
|
var tok;
|
|
if (!(tok = this.prev(index))) {
|
|
return null;
|
|
}
|
|
if (typeof val !== "undefined" && val !== null) {
|
|
return (tok[1] = val);
|
|
}
|
|
return tok[1];
|
|
};
|
|
Lexer.prototype.prev = function(index) {
|
|
return this.tokens[this.tokens.length - (index || 1)];
|
|
};
|
|
Lexer.prototype.match = function(regex, index) {
|
|
var m;
|
|
if (!(m = this.chunk.match(regex))) {
|
|
return false;
|
|
}
|
|
return m ? m[index] : false;
|
|
};
|
|
Lexer.prototype.unfinished = function() {
|
|
var prev;
|
|
prev = this.prev(2);
|
|
return this.value() && this.value().match && this.value().match(NO_NEWLINE) && prev && (prev[0] !== '.') && !this.value().match(CODE) && !this.chunk.match(ASSIGNED);
|
|
};
|
|
return Lexer;
|
|
})();
|
|
JS_KEYWORDS = ["if", "else", "true", "false", "new", "return", "try", "catch", "finally", "throw", "break", "continue", "for", "in", "while", "delete", "instanceof", "typeof", "switch", "super", "extends", "class", "this", "null"];
|
|
COFFEE_ALIASES = ["and", "or", "is", "isnt", "not"];
|
|
COFFEE_KEYWORDS = COFFEE_ALIASES.concat(["then", "unless", "until", "loop", "yes", "no", "on", "off", "of", "by", "where", "when"]);
|
|
RESERVED = ["case", "default", "do", "function", "var", "void", "with", "const", "let", "enum", "export", "import", "native", "__hasProp", "__extends", "__slice"];
|
|
JS_FORBIDDEN = JS_KEYWORDS.concat(RESERVED);
|
|
IDENTIFIER = /^([a-zA-Z\$_](\w|\$)*)/;
|
|
NUMBER = /^(((\b0(x|X)[0-9a-fA-F]+)|((\b[0-9]+(\.[0-9]+)?|\.[0-9]+)(e[+\-]?[0-9]+)?)))\b/i;
|
|
HEREDOC = /^("{6}|'{6}|"{3}\n?([\s\S]*?)\n?([ \t]*)"{3}|'{3}\n?([\s\S]*?)\n?([ \t]*)'{3})/;
|
|
INTERPOLATION = /^#([a-zA-Z_@]\w*(\.\w+)*)/;
|
|
OPERATOR = /^(-[\-=>]?|\+[+=]?|[*&|\/%=<>:!?]+)([ \t]*)/;
|
|
WHITESPACE = /^([ \t]+)/;
|
|
COMMENT = /^(\s*\#{3}(?!#)[ \t]*\n+([\s\S]*?)[ \t]*\n+[ \t]*\#{3}|(\s*#(?!##[^#])[^\n]*)+)/;
|
|
CODE = /^((-|=)>)/;
|
|
MULTI_DENT = /^((\n([ \t]*))+)(\.)?/;
|
|
LAST_DENTS = /\n([ \t]*)/g;
|
|
LAST_DENT = /\n([ \t]*)/;
|
|
REGEX_START = /^\/[^\/ ]/;
|
|
REGEX_INTERPOLATION = /([^\\]#[a-zA-Z_@]|[^\\]#\{.*[^\\]\})/;
|
|
REGEX_END = /^(([imgy]{1,4})\b|\W|$)/;
|
|
REGEX_ESCAPE = /\\[^\$]/g;
|
|
JS_CLEANER = /(^`|`$)/g;
|
|
MULTILINER = /\n/g;
|
|
STRING_NEWLINES = /\n[ \t]*/g;
|
|
NO_NEWLINE = /^([+\*&|\/\-%=<>!.\\][<>=&|]*|and|or|is|isnt|not|delete|typeof|instanceof)$/;
|
|
HEREDOC_INDENT = /(\n+([ \t]*)|^([ \t]+))/g;
|
|
ASSIGNED = /^\s*([a-zA-Z\$_@]\w*[ \t]*?[:=][^=])/;
|
|
NEXT_CHARACTER = /^\s*(\S)/;
|
|
NOT_REGEX = ['NUMBER', 'REGEX', '++', '--', 'FALSE', 'NULL', 'TRUE', ']'];
|
|
CALLABLE = ['IDENTIFIER', 'SUPER', ')', ']', '}', 'STRING', '@', 'THIS', '?', '::'];
|
|
LINE_BREAK = ['INDENT', 'OUTDENT', 'TERMINATOR'];
|
|
CONVERSIONS = {
|
|
'and': '&&',
|
|
'or': '||',
|
|
'is': '==',
|
|
'isnt': '!=',
|
|
'not': '!',
|
|
'===': '=='
|
|
};
|
|
})();
|