329 lines
12 KiB
JavaScript
Executable File
329 lines
12 KiB
JavaScript
Executable File
CodeMirror.addParser("javascript", (function() {
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// Tokenizer
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var keywords = function(){
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function kw(type) {return {type: type, style: "js-keyword"};}
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var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c");
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var operator = kw("operator"), atom = {type: "atom", style: "js-atom"};
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return {
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"if": A, "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
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"return": C, "break": C, "continue": C, "new": C, "delete": C, "throw": C,
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"var": kw("var"), "function": kw("function"), "catch": kw("catch"),
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"for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
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"in": operator, "typeof": operator, "instanceof": operator,
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"true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom
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};
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}();
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var isOperatorChar = /[+\-*&%=<>!?|]/;
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function chain(stream, state, f) {
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state.tokenize = f;
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return f(stream, state);
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}
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function nextUntilUnescaped(stream, end) {
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var escaped = false, next;
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while ((next = stream.next()) != null) {
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if (next == end && !escaped)
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return false;
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escaped = !escaped && next == "\\";
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}
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return escaped;
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}
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function jsTokenBase(stream, state) {
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function readOperator(ch) {
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return {type: "operator", style: "js-operator", content: ch + stream.eatWhile(isOperatorChar)};
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}
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var ch = stream.next();
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if (ch == '"' || ch == "'")
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return chain(stream, state, jsTokenString(ch));
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else if (/[\[\]{}\(\),;\:\.]/.test(ch))
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return {type: ch, style: "js-punctuation"};
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else if (ch == "0" && stream.eat(/x/i)) {
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while (stream.eat(/[\da-f]/i));
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return {type: "number", style: "js-atom"};
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}
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else if (/\d/.test(ch)) {
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stream.match(/^\d*(?:\.\d*)?(?:e[+\-]?\d+)?/);
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return {type: "number", style: "js-atom"};
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}
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else if (ch == "/") {
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if (stream.eat("*")) {
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return chain(stream, state, jsTokenComment);
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}
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else if (stream.eat("/")) {
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while (stream.next() != null);
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return {type: "comment", style: "js-comment"};
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}
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else if (state.reAllowed) {
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nextUntilUnescaped(stream, "/");
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while (stream.eat(/[gimy]/)); // 'y' is "sticky" option in Mozilla
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return {type: "regexp", style: "js-string"};
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}
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else return readOperator(ch);
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}
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else if (isOperatorChar.test(ch))
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return readOperator(ch);
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else {
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var word = ch + stream.eatWhile(/[\w\$_]/);
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var known = keywords.propertyIsEnumerable(word) && keywords[word];
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return known ? {type: known.type, style: known.style, content: word} :
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{type: "variable", style: "js-variable", content: word};
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}
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}
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function jsTokenString(quote) {
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return function(stream, state) {
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if (!nextUntilUnescaped(stream, quote))
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state.tokenize = jsTokenBase;
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return {type: "string", style: "js-string"};
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};
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}
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function jsTokenComment(stream, state) {
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var maybeEnd = false, ch;
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while (ch = stream.next()) {
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if (ch == "/" && maybeEnd) {
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state.tokenize = jsTokenBase;
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break;
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}
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maybeEnd = (ch == "*");
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}
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return {type: "comment", style: "js-comment"};
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}
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// Parser
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var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true};
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function JSLexical(indented, column, type, align, prev, info) {
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this.indented = indented;
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this.column = column;
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this.type = type;
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this.prev = prev;
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this.info = info;
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if (align != null) this.align = align;
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}
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function indentJS(state, textAfter) {
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var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical,
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type = lexical.type, closing = firstChar == type, iu = state.indentUnit;
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if (type == "vardef") return lexical.indented + 4;
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else if (type == "form" && firstChar == "{") return lexical.indented;
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else if (type == "stat" || type == "form") return lexical.indented + iu;
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else if (lexical.info == "switch" && !closing)
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return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? iu : 2 * iu);
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else if (lexical.align) return lexical.column - (closing ? 1 : 0);
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else return lexical.indented + (closing ? 0 : iu);
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}
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function startState(basecolumn, indentUnit) {
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if (!indentUnit) indentUnit = 2;
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return {
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tokenize: jsTokenBase,
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reAllowed: true,
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cc: [],
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lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
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context: null,
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indented: 0,
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indentUnit: indentUnit
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};
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}
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function parseJS(token, column, indent, state) {
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var cc = state.cc, type = token.type;
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function pass() {
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for (var i = arguments.length - 1; i >= 0; i--) cc.push(arguments[i]);
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}
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var cx = {
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state: state,
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column: column,
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pass: pass,
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cont: function(){pass.apply(null, arguments); return true;},
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register: function(varname) {
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if (state.context) {
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cx.marked = "js-variabledef";
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state.context.vars[varname] = true;
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}
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}
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};
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function inScope(varname) {
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var cursor = state.context;
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while (cursor) {
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if (cursor.vars[varname])
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return true;
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cursor = cursor.prev;
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}
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}
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if (indent != null) {
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if (!state.lexical.hasOwnProperty("align"))
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state.lexical.align = false;
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state.indented = indent;
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}
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if (type == "whitespace" || type == "comment")
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return token.style;
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if (!state.lexical.hasOwnProperty("align"))
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state.lexical.align = true;
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while(true) {
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var combinator = cc.length ? cc.pop() : state.json ? expression : statement;
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if (combinator(cx, type, token.content)) {
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while(cc.length && cc[cc.length - 1].lex)
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cc.pop()(cx);
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if (cx.marked) return cx.marked;
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if (type == "variable" && inScope(token.content)) return "js-localvariable";
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return token.style;
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}
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}
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}
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// Combinators
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function pushcontext(cx) {
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cx.state.context = {prev: cx.state.context, vars: {"this": true, "arguments": true}};
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}
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function popcontext(cx) {
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cx.state.context = cx.state.context.prev;
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}
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function pushlex(type, info) {
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var result = function(cx) {
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var state = cx.state;
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state.lexical = new JSLexical(state.indented, cx.column, type, null, state.lexical, info)
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};
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result.lex = true;
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return result;
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}
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function poplex(cx) {
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var state = cx.state;
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if (state.lexical.type == ")")
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state.indented = state.lexical.indented;
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state.lexical = state.lexical.prev;
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}
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poplex.lex = true;
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function expect(wanted) {
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return function expecting(cx, type) {
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if (type == wanted) return cx.cont();
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else if (wanted == ";") return;
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else return cx.cont(arguments.callee);
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};
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}
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function statement(cx, type) {
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if (type == "var") return cx.cont(pushlex("vardef"), vardef1, expect(";"), poplex);
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if (type == "keyword a") return cx.cont(pushlex("form"), expression, statement, poplex);
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if (type == "keyword b") return cx.cont(pushlex("form"), statement, poplex);
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if (type == "{") return cx.cont(pushlex("}"), block, poplex);
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if (type == ";") return cx.cont();
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if (type == "function") return cx.cont(functiondef);
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if (type == "for") return cx.cont(pushlex("form"), expect("("), pushlex(")"), forspec1, expect(")"),
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poplex, statement, poplex);
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if (type == "variable") return cx.cont(pushlex("stat"), maybelabel);
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if (type == "switch") return cx.cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),
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block, poplex, poplex);
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if (type == "case") return cx.cont(expression, expect(":"));
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if (type == "default") return cx.cont(expect(":"));
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if (type == "catch") return cx.cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
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statement, poplex, popcontext);
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return cx.pass(pushlex("stat"), expression, expect(";"), poplex);
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}
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function expression(cx, type) {
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if (atomicTypes.hasOwnProperty(type)) return cx.cont(maybeoperator);
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if (type == "function") return cx.cont(functiondef);
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if (type == "keyword c") return cx.cont(expression);
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if (type == "(") return cx.cont(pushlex(")"), expression, expect(")"), poplex, maybeoperator);
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if (type == "operator") return cx.cont(expression);
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if (type == "[") return cx.cont(pushlex("]"), commasep(expression, "]"), poplex, maybeoperator);
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if (type == "{") return cx.cont(pushlex("}"), commasep(objprop, "}"), poplex, maybeoperator);
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return cx.cont();
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}
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function maybeoperator(cx, type, value) {
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if (type == "operator" && /\+\+|--/.test(value)) return cx.cont(maybeoperator);
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if (type == "operator") return cx.cont(expression);
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if (type == ";") return;
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if (type == "(") return cx.cont(pushlex(")"), commasep(expression, ")"), poplex, maybeoperator);
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if (type == ".") return cx.cont(property, maybeoperator);
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if (type == "[") return cx.cont(pushlex("]"), expression, expect("]"), poplex, maybeoperator);
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}
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function maybelabel(cx, type) {
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if (type == ":") return cx.cont(poplex, statement);
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return cx.pass(maybeoperator, expect(";"), poplex);
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}
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function property(cx, type) {
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if (type == "variable") {cx.marked = "js-property"; return cx.cont();}
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}
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function objprop(cx, type) {
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if (type == "variable") cx.marked = "js-property";
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if (atomicTypes.hasOwnProperty(type)) return cx.cont(expect(":"), expression);
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}
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function commasep(what, end) {
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function proceed(cx, type) {
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if (type == ",") return cx.cont(what, proceed);
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if (type == end) return cx.cont();
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return cx.cont(expect(end));
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}
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return function commaSeparated(cx, type) {
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if (type == end) return cx.cont();
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else return cx.pass(what, proceed);
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};
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}
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function block(cx, type) {
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if (type == "}") return cx.cont();
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return cx.pass(statement, block);
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}
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function vardef1(cx, type, value) {
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if (type == "variable"){cx.register(value); return cx.cont(vardef2);}
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return cx.cont();
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}
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function vardef2(cx, type, value) {
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if (value == "=") return cx.cont(expression, vardef2);
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if (type == ",") return cx.cont(vardef1);
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}
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function forspec1(cx, type) {
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if (type == "var") return cx.cont(vardef1, forspec2);
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if (type == ";") return cx.pass(forspec2);
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if (type == "variable") return cx.cont(formaybein);
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return cx.pass(forspec2);
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}
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function formaybein(cx, type, value) {
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if (value == "in") return cx.cont(expression);
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return cx.cont(maybeoperator, forspec2);
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}
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function forspec2(cx, type, value) {
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if (type == ";") return cx.cont(forspec3);
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if (value == "in") return cx.cont(expression);
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return cx.cont(expression, expect(";"), forspec3);
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}
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function forspec3(cx, type) {
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if (type != ")") cx.cont(expression);
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}
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function functiondef(cx, type, value) {
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if (type == "variable") {cx.register(value); return cx.cont(functiondef);}
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if (type == "(") return cx.cont(pushcontext, commasep(funarg, ")"), statement, popcontext);
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}
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function funarg(cx, type, value) {
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if (type == "variable") {cx.register(value); return cx.cont();}
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}
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// Interface
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return {
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startState: startState,
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token: function(stream, state) {
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if (stream.column() == 0)
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var indent = stream.eatSpace();
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var token = state.tokenize(stream, state);
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state.reAllowed = token.type == "operator" || token.type == "keyword c" || token.type.match(/^[\[{}\(,;:]$/);
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stream.eatSpace();
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return parseJS(token, stream.column(), indent, state);
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},
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indent: indentJS
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};
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})());
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