629 lines
21 KiB
JavaScript
629 lines
21 KiB
JavaScript
(function() {
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var ASSIGNED, CALLABLE, CODE, COFFEE_ALIASES, COFFEE_KEYWORDS, COMMENT, COMPARE, COMPOUND_ASSIGN, HEREDOC, HEREDOC_INDENT, HEREGEX, HEREGEX_OMIT, IDENTIFIER, JSTOKEN, JS_FORBIDDEN, JS_KEYWORDS, LEADING_SPACES, LINE_BREAK, LOGIC, Lexer, MATH, MULTILINER, MULTI_DENT, NEXT_CHARACTER, NOT_REGEX, NO_NEWLINE, NUMBER, OPERATOR, REGEX, RELATION, RESERVED, Rewriter, SHIFT, SIMPLESTR, TRAILING_SPACES, UNARY, WHITESPACE, _ref, compact, count, include, last, op, starts;
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Rewriter = require('./rewriter').Rewriter;
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_ref = require('./helpers'), include = _ref.include, count = _ref.count, starts = _ref.starts, compact = _ref.compact, last = _ref.last;
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exports.Lexer = (function() {
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Lexer = (function() {
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return function Lexer() {};
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})();
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Lexer.prototype.tokenize = function(code, options) {
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var o;
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code = code.replace(/\r/g, '').replace(TRAILING_SPACES, '');
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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.indebt = 0;
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this.outdebt = 0;
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this.seenFor = false;
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this.indents = [];
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this.tokens = [];
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while ((this.chunk = code.slice(this.i))) {
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this.identifierToken() || this.commentToken() || this.whitespaceToken() || this.lineToken() || this.heredocToken() || this.stringToken() || this.numberToken() || this.regexToken() || this.jsToken() || this.literalToken();
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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.identifierToken = function() {
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var forcedIdentifier, id, match, tag;
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if (!(match = IDENTIFIER.exec(this.chunk))) {
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return false;
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}
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id = match[0];
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this.i += id.length;
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if (id === 'all' && this.tag() === 'FOR') {
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this.token('ALL', id);
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return true;
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}
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forcedIdentifier = this.tagAccessor() || ASSIGNED.test(this.chunk);
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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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if (tag === 'WHEN' && include(LINE_BREAK, this.tag())) {
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tag = 'LEADING_WHEN';
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} else if (tag === 'FOR') {
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this.seenFor = true;
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} else if (include(UNARY, tag)) {
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tag = 'UNARY';
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} else if (include(RELATION, tag)) {
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if (tag !== 'INSTANCEOF' && this.seenFor) {
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this.seenFor = false;
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tag = 'FOR' + tag;
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} else {
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tag = 'RELATION';
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if (this.value() === '!') {
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this.tokens.pop();
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id = '!' + id;
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}
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}
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}
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}
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if (include(JS_FORBIDDEN, id)) {
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if (forcedIdentifier) {
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tag = 'IDENTIFIER';
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id = new String(id);
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id.reserved = true;
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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 (COFFEE_ALIASES.hasOwnProperty(id)) {
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tag = (id = COFFEE_ALIASES[id]);
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}
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if (id === '!') {
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tag = 'UNARY';
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} else if (include(LOGIC, id)) {
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tag = 'LOGIC';
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}
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}
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this.token(tag, id);
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return true;
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};
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Lexer.prototype.numberToken = function() {
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var match, number;
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if (!(match = NUMBER.exec(this.chunk))) {
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return false;
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}
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number = match[0];
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if (this.tag() === '.' && number.charAt(0) === '.') {
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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 match, string;
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switch (this.chunk.charAt(0)) {
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case "'":
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if (!(match = SIMPLESTR.exec(this.chunk))) {
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return false;
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}
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this.token('STRING', (string = match[0]).replace(MULTILINER, '\\\n'));
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break;
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case '"':
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if (!(string = this.balancedString(this.chunk, [['"', '"'], ['#{', '}']]))) {
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return false;
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}
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if (0 < string.indexOf('#{', 1)) {
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this.interpolateString(string.slice(1, -1));
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} else {
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this.token('STRING', this.escapeLines(string));
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}
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break;
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default:
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return false;
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}
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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, heredoc, match, quote;
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if (!(match = HEREDOC.exec(this.chunk))) {
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return false;
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}
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heredoc = match[0];
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quote = heredoc.charAt(0);
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doc = this.sanitizeHeredoc(match[2], {
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quote: quote,
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indent: null
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});
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if (quote === '"' && (0 <= doc.indexOf('#{'))) {
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this.interpolateString(doc, {
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heredoc: true
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});
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} else {
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this.token('STRING', this.makeString(doc, quote, true));
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}
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this.line += count(heredoc, '\n');
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this.i += heredoc.length;
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return true;
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};
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Lexer.prototype.commentToken = function() {
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var _ref2, comment, here, 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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_ref2 = match, comment = _ref2[0], here = _ref2[1];
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this.line += count(comment, '\n');
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this.i += comment.length;
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if (here) {
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this.token('HERECOMMENT', this.sanitizeHeredoc(here, {
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herecomment: true,
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indent: Array(this.indent + 1).join(' ')
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}));
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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 match, script;
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if (!(this.chunk.charAt(0) === '`' && (match = JSTOKEN.exec(this.chunk)))) {
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return false;
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}
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this.token('JS', (script = match[0]).slice(1, -1));
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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 match;
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if (this.chunk.charAt(0) !== '/') {
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return false;
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}
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if (match = HEREGEX.exec(this.chunk)) {
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return this.heregexToken(match);
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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 (!(match = REGEX.exec(this.chunk))) {
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return false;
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}
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this.token('REGEX', match[0]);
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this.i += match[0].length;
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return true;
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};
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Lexer.prototype.heregexToken = function(match) {
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var _i, _len, _ref2, _ref3, _ref4, _ref5, _this, body, flags, heregex, re, tag, tokens, value;
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_ref2 = match, heregex = _ref2[0], body = _ref2[1], flags = _ref2[2];
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this.i += heregex.length;
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if (0 > body.indexOf('#{')) {
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re = body.replace(HEREGEX_OMIT, '').replace(/\//g, '\\/');
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this.token('REGEX', "/" + (re || '(?:)') + "/" + flags);
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return true;
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}
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this.token('IDENTIFIER', 'RegExp');
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this.tokens.push(['CALL_START', '(']);
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tokens = [];
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for (_i = 0, _len = (_ref3 = this.interpolateString(body, {
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regex: true
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})).length; _i < _len; _i++) {
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_ref4 = _ref3[_i], tag = _ref4[0], value = _ref4[1];
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if (tag === 'TOKENS') {
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tokens.push.apply(tokens, value);
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} else {
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if (!(value = value.replace(HEREGEX_OMIT, ''))) {
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continue;
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}
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value = value.replace(/\\/g, '\\\\');
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tokens.push(['STRING', this.makeString(value, '"', true)]);
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}
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tokens.push(['+', '+']);
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}
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tokens.pop();
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if ((((_ref5 = tokens[0]) != null) ? _ref5[0] !== 'STRING' : undefined)) {
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this.tokens.push(['STRING', '""'], ['+', '+']);
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}
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(_this = this.tokens).push.apply(_this, tokens);
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if (flags) {
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this.tokens.push([',', ','], ['STRING', '"' + flags + '"']);
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}
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this.tokens.push(['CALL_END', ')']);
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return true;
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};
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Lexer.prototype.lineToken = function() {
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var diff, indent, match, nextCharacter, noNewlines, prev, size;
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if (!(match = MULTI_DENT.exec(this.chunk))) {
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return false;
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}
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indent = match[0];
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this.line += count(indent, '\n');
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this.i += indent.length;
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prev = last(this.tokens, 1);
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size = indent.length - 1 - indent.lastIndexOf('\n');
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nextCharacter = NEXT_CHARACTER.exec(this.chunk)[1];
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noNewlines = (('.' === nextCharacter || ',' === nextCharacter)) || this.unfinished();
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if (size - this.indebt === 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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this.indebt = size - this.indent;
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return this.suppressNewlines();
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}
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diff = size - this.indent + this.outdebt;
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this.token('INDENT', diff);
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this.indents.push(diff);
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this.outdebt = (this.indebt = 0);
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} else {
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this.indebt = 0;
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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 match, prev;
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if (!(match = WHITESPACE.exec(this.chunk))) {
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return false;
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}
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prev = last(this.tokens);
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if (prev) {
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prev.spaced = true;
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}
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this.i += match[0].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 _ref2, match, prev, tag, value;
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if (match = OPERATOR.exec(this.chunk)) {
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value = match[0];
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if (CODE.test(value)) {
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this.tagParameters();
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}
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} else {
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value = this.chunk.charAt(0);
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}
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this.i += value.length;
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tag = value;
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prev = last(this.tokens);
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if (value === '=') {
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if (!prev[1].reserved && include(JS_FORBIDDEN, prev[1])) {
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this.assignmentError();
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}
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if (('or' === (_ref2 = prev[1]) || 'and' === _ref2)) {
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prev[0] = 'COMPOUND_ASSIGN';
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prev[1] = COFFEE_ALIASES[prev[1]] + '=';
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return true;
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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 (include(LOGIC, value)) {
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tag = 'LOGIC';
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} else if (include(MATH, value)) {
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tag = 'MATH';
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} else if (include(COMPARE, value)) {
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tag = 'COMPARE';
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} else if (include(COMPOUND_ASSIGN, value)) {
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tag = 'COMPOUND_ASSIGN';
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} else if (include(UNARY, value)) {
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tag = 'UNARY';
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} else if (include(SHIFT, value)) {
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tag = 'SHIFT';
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} else if (value === '?' && prev.spaced) {
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tag = 'LOGIC';
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} else if (prev && !prev.spaced && include(CALLABLE, prev[0])) {
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if (value === '(') {
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if (prev[0] === '?') {
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prev[0] = 'FUNC_EXIST';
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}
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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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switch (prev[0]) {
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case '?':
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prev[0] = 'INDEX_SOAK';
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break;
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case '::':
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prev[0] = 'INDEX_PROTO';
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break;
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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 = last(this.tokens)) || 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(0, 'PROTOTYPE_ACCESS');
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} else if (prev[1] === '.' && this.value(1) !== '.') {
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if (this.tag(1) === '?') {
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this.tag(0, 'SOAK_ACCESS');
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return this.tokens.splice(-2, 1);
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} else {
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return this.tag(0, '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 _ref2, _ref3, attempt, herecomment, indent, match;
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_ref2 = options, indent = _ref2.indent, herecomment = _ref2.herecomment;
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if (herecomment && 0 > doc.indexOf('\n')) {
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return doc;
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|
}
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if (!herecomment) {
|
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while (match = HEREDOC_INDENT.exec(doc)) {
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attempt = match[1];
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if (indent === null || (0 < (_ref3 = attempt.length)) && (_ref3 < indent.length)) {
|
|
indent = attempt;
|
|
}
|
|
}
|
|
}
|
|
if (indent) {
|
|
doc = doc.replace(RegExp("\\n" + indent, "g"), '\n');
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|
}
|
|
if (!herecomment) {
|
|
doc = doc.replace(/^\n/, '');
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}
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|
return doc;
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|
};
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|
Lexer.prototype.tagParameters = function() {
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var i, tok;
|
|
if (this.tag() !== ')') {
|
|
return;
|
|
}
|
|
i = this.tokens.length;
|
|
while (true) {
|
|
if (!(tok = this.tokens[--i])) {
|
|
return;
|
|
}
|
|
switch (tok[0]) {
|
|
case 'IDENTIFIER':
|
|
tok[0] = 'PARAM';
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|
break;
|
|
case ')':
|
|
tok[0] = 'PARAM_END';
|
|
break;
|
|
case '(':
|
|
case 'CALL_START':
|
|
return (tok[0] = 'PARAM_START');
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
Lexer.prototype.closeIndentation = function() {
|
|
return this.outdentToken(this.indent);
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|
};
|
|
Lexer.prototype.identifierError = function(word) {
|
|
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 _i, _len, _ref2, close, i, levels, open, pair, slen;
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|
options || (options = {});
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|
levels = [];
|
|
i = 0;
|
|
slen = str.length;
|
|
while (i < slen) {
|
|
if (levels.length && str.charAt(i) === '\\') {
|
|
i += 1;
|
|
} else {
|
|
for (_i = 0, _len = delimited.length; _i < _len; _i++) {
|
|
pair = delimited[_i];
|
|
_ref2 = pair, open = _ref2[0], close = _ref2[1];
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|
if (levels.length && starts(str, close, i) && last(levels) === pair) {
|
|
levels.pop();
|
|
i += close.length - 1;
|
|
if (!levels.length) {
|
|
i += 1;
|
|
}
|
|
break;
|
|
}
|
|
if (starts(str, open, i)) {
|
|
levels.push(pair);
|
|
i += open.length - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!levels.length) {
|
|
break;
|
|
}
|
|
i += 1;
|
|
}
|
|
if (levels.length) {
|
|
throw new Error("SyntaxError: Unterminated " + (levels.pop()[0]) + " starting on line " + (this.line + 1));
|
|
}
|
|
return !i ? false : str.slice(0, i);
|
|
};
|
|
Lexer.prototype.interpolateString = function(str, options) {
|
|
var _len, _ref2, _ref3, _this, expr, heredoc, i, inner, interpolated, letter, nested, pi, regex, tag, tokens, value;
|
|
_ref2 = options || (options = {}), heredoc = _ref2.heredoc, regex = _ref2.regex;
|
|
tokens = [];
|
|
pi = 0;
|
|
i = -1;
|
|
while (letter = str.charAt(i += 1)) {
|
|
if (letter === '\\') {
|
|
i += 1;
|
|
continue;
|
|
}
|
|
if (!(letter === '#' && str.charAt(i + 1) === '{' && (expr = this.balancedString(str.slice(i + 1), [['{', '}']])))) {
|
|
continue;
|
|
}
|
|
if (pi < i) {
|
|
tokens.push(['TO_BE_STRING', str.slice(pi, i)]);
|
|
}
|
|
inner = expr.slice(1, -1).replace(LEADING_SPACES, '').replace(TRAILING_SPACES, '');
|
|
if (inner.length) {
|
|
nested = new Lexer().tokenize(inner, {
|
|
line: this.line,
|
|
rewrite: false
|
|
});
|
|
nested.pop();
|
|
if (nested.length > 1) {
|
|
nested.unshift(['(', '(']);
|
|
nested.push([')', ')']);
|
|
}
|
|
tokens.push(['TOKENS', nested]);
|
|
}
|
|
i += expr.length;
|
|
pi = i + 1;
|
|
}
|
|
if ((i > pi) && (pi < str.length)) {
|
|
tokens.push(['TO_BE_STRING', str.slice(pi)]);
|
|
}
|
|
if (regex) {
|
|
return tokens;
|
|
}
|
|
if (!tokens.length) {
|
|
return this.token('STRING', '""');
|
|
}
|
|
if (interpolated = tokens.length > 1) {
|
|
this.token('(', '(');
|
|
}
|
|
if (tokens[0][0] !== 'TO_BE_STRING') {
|
|
this.tokens.push(['STRING', '""'], ['+', '+']);
|
|
}
|
|
for (i = 0, _len = tokens.length; i < _len; i++) {
|
|
_ref3 = tokens[i], tag = _ref3[0], value = _ref3[1];
|
|
if (i) {
|
|
this.token('+', '+');
|
|
}
|
|
if (tag === 'TOKENS') {
|
|
(_this = this.tokens).push.apply(_this, value);
|
|
} else {
|
|
this.token('STRING', this.makeString(value, '"', heredoc));
|
|
}
|
|
}
|
|
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, tag) {
|
|
var tok;
|
|
return (tok = last(this.tokens, index)) && ((tag != null) ? (tok[0] = tag) : tok[0]);
|
|
};
|
|
Lexer.prototype.value = function(index, val) {
|
|
var tok;
|
|
return (tok = last(this.tokens, index)) && ((val != null) ? (tok[1] = val) : tok[1]);
|
|
};
|
|
Lexer.prototype.unfinished = function() {
|
|
var prev, value;
|
|
return (prev = last(this.tokens, 1)) && prev[0] !== '.' && (value = this.value()) && NO_NEWLINE.test(value) && !CODE.test(value) && !ASSIGNED.test(this.chunk);
|
|
};
|
|
Lexer.prototype.escapeLines = function(str, heredoc) {
|
|
return str.replace(MULTILINER, heredoc ? '\\n' : '');
|
|
};
|
|
Lexer.prototype.makeString = function(body, quote, heredoc) {
|
|
body = body.replace(/\\([\s\S])/g, function(match, contents) {
|
|
return ('\n' === contents || quote === contents) ? contents : match;
|
|
});
|
|
body = body.replace(RegExp("" + quote, "g"), '\\$&');
|
|
return quote + this.escapeLines(body, heredoc) + quote;
|
|
};
|
|
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', 'debugger'];
|
|
COFFEE_KEYWORDS = ['then', 'unless', 'until', 'loop', 'of', 'by', 'when'];
|
|
for (op in (COFFEE_ALIASES = {
|
|
and: '&&',
|
|
or: '||',
|
|
is: '==',
|
|
isnt: '!=',
|
|
not: '!',
|
|
yes: 'TRUE',
|
|
no: 'FALSE',
|
|
on: 'TRUE',
|
|
off: 'FALSE'
|
|
})) {
|
|
COFFEE_KEYWORDS.push(op);
|
|
}
|
|
COFFEE_ALIASES['==='] = '==';
|
|
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 = /^0x[\da-f]+|^(?:\d+(\.\d+)?|\.\d+)(?:e[+-]?\d+)?/i;
|
|
HEREDOC = /^("""|''')([\s\S]*?)(?:\n[ \t]*)?\1/;
|
|
OPERATOR = /^(?:-[-=>]?|\+[+=]?|[*&|\/%=<>^:!?]+)/;
|
|
WHITESPACE = /^[ \t]+/;
|
|
COMMENT = /^###([^#][\s\S]*?)(?:###[ \t]*\n|(?:###)?$)|^(?:\s*#(?!##[^#]).*)+/;
|
|
CODE = /^[-=]>/;
|
|
MULTI_DENT = /^(?:\n[ \t]*)+/;
|
|
SIMPLESTR = /^'[^\\']*(?:\\.[^\\']*)*'/;
|
|
JSTOKEN = /^`[^\\`]*(?:\\.[^\\`]*)*`/;
|
|
REGEX = /^\/(?!\s)(?:[^[\/\n\\]+|\\.|\[([^\\\]]+|\\.)*])+\/[imgy]{0,4}(?![A-Za-z])/;
|
|
HEREGEX = /^\/{3}([\s\S]+?)\/{3}([imgy]{0,4})(?![A-Za-z])/;
|
|
HEREGEX_OMIT = /\s+(?:#.*)?/g;
|
|
MULTILINER = /\n/g;
|
|
HEREDOC_INDENT = /\n+([ \t]*)/g;
|
|
ASSIGNED = /^\s*@?[$A-Za-z_][$\w]*[ \t]*?[:=][^:=>]/;
|
|
NEXT_CHARACTER = /^\s*(\S?)/;
|
|
LEADING_SPACES = /^\s+/;
|
|
TRAILING_SPACES = /\s+$/;
|
|
NO_NEWLINE = /^(?:[-+*&|\/%=<>!.\\][<>=&|]*|and|or|is(?:nt)?|n(?:ot|ew)|delete|typeof|instanceof)$/;
|
|
COMPOUND_ASSIGN = ['-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?=', '<<=', '>>=', '>>>=', '&=', '^=', '|='];
|
|
UNARY = ['UMINUS', 'UPLUS', '!', '!!', '~', 'NEW', 'TYPEOF', 'DELETE'];
|
|
LOGIC = ['&', '|', '^', '&&', '||'];
|
|
SHIFT = ['<<', '>>', '>>>'];
|
|
COMPARE = ['<=', '<', '>', '>='];
|
|
MATH = ['*', '/', '%'];
|
|
RELATION = ['IN', 'OF', 'INSTANCEOF'];
|
|
NOT_REGEX = ['NUMBER', 'REGEX', '++', '--', 'FALSE', 'NULL', 'TRUE', ']'];
|
|
CALLABLE = ['IDENTIFIER', 'SUPER', ')', ']', '}', 'STRING', '@', 'THIS', '?', '::'];
|
|
LINE_BREAK = ['INDENT', 'OUTDENT', 'TERMINATOR'];
|
|
}).call(this);
|