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CodeMirror.defineMode("go", function(config, parserConfig) {
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var indentUnit = config.indentUnit;
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"break":true, "case":true, "chan":true, "const":true, "continue":true,
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"default":true, "defer":true, "else":true, "fallthrough":true, "for":true,
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"func":true, "go":true, "goto":true, "if":true, "import":true,
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"interface":true, "map":true, "package":true, "range":true, "return":true,
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"select":true, "struct":true, "switch":true, "type":true, "var":true,
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"bool":true, "byte":true, "complex64":true, "complex128":true,
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"float32":true, "float64":true, "int8":true, "int16":true, "int32":true,
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"int64":true, "string":true, "uint8":true, "uint16":true, "uint32":true,
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"uint64":true, "int":true, "uint":true, "uintptr":true
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"true":true, "false":true, "iota":true, "nil":true, "append":true,
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"cap":true, "close":true, "complex":true, "copy":true, "imag":true,
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"len":true, "make":true, "new":true, "panic":true, "print":true,
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"println":true, "real":true, "recover":true
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"else":true, "for":true, "func":true, "if":true, "interface":true,
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"select":true, "struct":true, "switch":true
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var isOperatorChar = /[+\-*&^%:=<>!|\/]/;
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function tokenBase(stream, state) {
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var ch = stream.next();
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if (ch == '"' || ch == "'" || ch == "`") {
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state.tokenize = tokenString(ch);
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return state.tokenize(stream, state);
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if (/[\d\.]/.test(ch)) {
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stream.match(/^[0-9]+([eE][\-+]?[0-9]+)?/);
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} else if (ch == "0") {
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stream.match(/^[xX][0-9a-fA-F]+/) || stream.match(/^0[0-7]+/);
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stream.match(/^[0-9]*\.?[0-9]*([eE][\-+]?[0-9]+)?/);
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if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
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if (stream.eat("*")) {
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state.tokenize = tokenComment;
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return tokenComment(stream, state);
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if (stream.eat("/")) {
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if (isOperatorChar.test(ch)) {
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stream.eatWhile(isOperatorChar);
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stream.eatWhile(/[\w\$_]/);
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var cur = stream.current();
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if (keywords.propertyIsEnumerable(cur)) {
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if (cur == "case" || cur == "default") curPunc = "case";
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if (atoms.propertyIsEnumerable(cur)) return "atom";
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function tokenString(quote) {
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return function(stream, state) {
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var escaped = false, next, end = false;
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while ((next = stream.next()) != null) {
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if (next == quote && !escaped) {end = true; break;}
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escaped = !escaped && next == "\\";
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if (end || !(escaped || quote == "`"))
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state.tokenize = tokenBase;
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function tokenComment(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 = tokenBase;
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maybeEnd = (ch == "*");
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function Context(indented, column, type, align, prev) {
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this.indented = indented;
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this.column = column;
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function pushContext(state, col, type) {
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return state.context = new Context(state.indented, col, type, null, state.context);
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function popContext(state) {
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var t = state.context.type;
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if (t == ")" || t == "]" || t == "}")
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state.indented = state.context.indented;
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return state.context = state.context.prev;
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startState: function(basecolumn) {
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context: new Context((basecolumn || 0) - indentUnit, 0, "top", false),
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token: function(stream, state) {
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var ctx = state.context;
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if (ctx.align == null) ctx.align = false;
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state.indented = stream.indentation();
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state.startOfLine = true;
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if (ctx.type == "case") ctx.type = "}";
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if (stream.eatSpace()) return null;
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var style = (state.tokenize || tokenBase)(stream, state);
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if (style == "comment") return style;
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if (ctx.align == null) ctx.align = true;
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if (curPunc == "{") pushContext(state, stream.column(), "}");
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else if (curPunc == "[") pushContext(state, stream.column(), "]");
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else if (curPunc == "(") pushContext(state, stream.column(), ")");
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else if (curPunc == "case") ctx.type = "case"
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else if (curPunc == "}" && ctx.type == "}") ctx = popContext(state);
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else if (curPunc == ctx.type) popContext(state);
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state.startOfLine = false;
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indent: function(state, textAfter) {
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if (state.tokenize != tokenBase && state.tokenize != null) return 0;
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var ctx = state.context, firstChar = textAfter && textAfter.charAt(0);
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if (ctx.type == "case" && /^(?:case|default)\b/.test(textAfter)) {
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state.context.type = "}";
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var closing = firstChar == ctx.type;
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if (ctx.align) return ctx.column + (closing ? 0 : 1);
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else return ctx.indented + (closing ? 0 : indentUnit);
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CodeMirror.defineMIME("text/x-go", "go");