mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 09:14:20 +00:00
433 lines
15 KiB
JavaScript
433 lines
15 KiB
JavaScript
CodeMirror.defineMode("rust", function() {
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var indentUnit = 4, altIndentUnit = 2;
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var valKeywords = {
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"if": "if-style", "while": "if-style", "loop": "if-style", "else": "else-style",
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"do": "else-style", "return": "else-style",
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"break": "atom", "cont": "atom", "const": "let", "resource": "fn",
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"let": "let", "fn": "fn", "for": "for", "match": "match", "trait": "trait",
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"impl": "impl", "type": "type", "enum": "enum", "struct": "atom", "mod": "mod",
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"as": "op", "true": "atom", "false": "atom", "assert": "op", "check": "op",
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"claim": "op", "extern": "ignore", "unsafe": "ignore", "import": "else-style",
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"export": "else-style", "copy": "op", "log": "op",
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"use": "op", "self": "atom", "pub": "atom", "priv": "atom"
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};
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var typeKeywords = function() {
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var keywords = {"fn": "fn"};
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var atoms = "bool uint int i8 i16 i32 i64 u8 u16 u32 u64 float f32 f64 str char".split(" ");
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for (var i = 0, e = atoms.length; i < e; ++i) keywords[atoms[i]] = "atom";
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return keywords;
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}();
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var operatorChar = /[+\-*&%=<>!?|\.@]/;
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// Tokenizer
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// Used as scratch variable to communicate multiple values without
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// consing up tons of objects.
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var tcat, content;
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function r(tc, style) {
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tcat = tc;
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return style;
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}
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function tokenBase(stream, state) {
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var ch = stream.next();
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if (ch == '"') {
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state.tokenize = tokenString;
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return state.tokenize(stream, state);
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}
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if (ch == "'") {
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tcat = "atom";
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if (stream.eat("\\")) {
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if (stream.skipTo("'")) { stream.next(); return "string"; }
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else { return "error"; }
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} else {
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stream.next();
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return stream.eat("'") ? "string" : "error";
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}
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}
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if (ch == "/") {
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if (stream.eat("/")) { stream.skipToEnd(); return "comment"; }
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if (stream.eat("*")) {
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state.tokenize = tokenComment(1);
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return state.tokenize(stream, state);
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}
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}
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if (ch == "#") {
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if (stream.eat("[")) { tcat = "open-attr"; return null; }
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stream.eatWhile(/\w/);
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return r("macro", "meta");
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}
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if (ch == ":" && stream.match(":<")) {
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return r("op", null);
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}
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if (ch.match(/\d/) || (ch == "." && stream.eat(/\d/))) {
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var flp = false;
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if (!stream.match(/^x[\da-f]+/i) && !stream.match(/^b[01]+/)) {
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stream.eatWhile(/\d/);
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if (stream.eat(".")) { flp = true; stream.eatWhile(/\d/); }
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if (stream.match(/^e[+\-]?\d+/i)) { flp = true; }
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}
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if (flp) stream.match(/^f(?:32|64)/);
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else stream.match(/^[ui](?:8|16|32|64)/);
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return r("atom", "number");
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}
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if (ch.match(/[()\[\]{}:;,]/)) return r(ch, null);
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if (ch == "-" && stream.eat(">")) return r("->", null);
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if (ch.match(operatorChar)) {
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stream.eatWhile(operatorChar);
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return r("op", null);
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}
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stream.eatWhile(/\w/);
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content = stream.current();
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if (stream.match(/^::\w/)) {
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stream.backUp(1);
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return r("prefix", "variable-2");
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}
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if (state.keywords.propertyIsEnumerable(content))
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return r(state.keywords[content], content.match(/true|false/) ? "atom" : "keyword");
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return r("name", "variable");
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}
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function tokenString(stream, state) {
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var ch, escaped = false;
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while (ch = stream.next()) {
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if (ch == '"' && !escaped) {
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state.tokenize = tokenBase;
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return r("atom", "string");
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}
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escaped = !escaped && ch == "\\";
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}
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// Hack to not confuse the parser when a string is split in
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// pieces.
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return r("op", "string");
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}
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function tokenComment(depth) {
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return function(stream, state) {
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var lastCh = null, ch;
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while (ch = stream.next()) {
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if (ch == "/" && lastCh == "*") {
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if (depth == 1) {
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state.tokenize = tokenBase;
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break;
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} else {
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state.tokenize = tokenComment(depth - 1);
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return state.tokenize(stream, state);
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}
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}
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if (ch == "*" && lastCh == "/") {
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state.tokenize = tokenComment(depth + 1);
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return state.tokenize(stream, state);
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}
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lastCh = ch;
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}
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return "comment";
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};
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}
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// Parser
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var cx = {state: null, stream: null, marked: null, cc: null};
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function pass() {
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for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
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}
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function cont() {
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pass.apply(null, arguments);
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return true;
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}
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function pushlex(type, info) {
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var result = function() {
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var state = cx.state;
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state.lexical = {indented: state.indented, column: cx.stream.column(),
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type: type, prev: state.lexical, info: 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() {
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var state = cx.state;
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if (state.lexical.prev) {
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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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}
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function typecx() { cx.state.keywords = typeKeywords; }
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function valcx() { cx.state.keywords = valKeywords; }
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poplex.lex = typecx.lex = valcx.lex = true;
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function commasep(comb, end) {
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function more(type) {
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if (type == ",") return cont(comb, more);
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if (type == end) return cont();
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return cont(more);
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}
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return function(type) {
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if (type == end) return cont();
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return pass(comb, more);
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};
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}
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function stat_of(comb, tag) {
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return cont(pushlex("stat", tag), comb, poplex, block);
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}
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function block(type) {
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if (type == "}") return cont();
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if (type == "let") return stat_of(letdef1, "let");
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if (type == "fn") return stat_of(fndef);
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if (type == "type") return cont(pushlex("stat"), tydef, endstatement, poplex, block);
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if (type == "enum") return stat_of(tagdef);
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if (type == "mod") return stat_of(mod);
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if (type == "trait") return stat_of(trait);
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if (type == "impl") return stat_of(impl);
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if (type == "open-attr") return cont(pushlex("]"), commasep(expression, "]"), poplex);
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if (type == "ignore" || type.match(/[\]\);,]/)) return cont(block);
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return pass(pushlex("stat"), expression, poplex, endstatement, block);
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}
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function endstatement(type) {
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if (type == ";") return cont();
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return pass();
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}
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function expression(type) {
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if (type == "atom" || type == "name") return cont(maybeop);
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if (type == "{") return cont(pushlex("}"), exprbrace, poplex);
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if (type.match(/[\[\(]/)) return matchBrackets(type, expression);
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if (type.match(/[\]\)\};,]/)) return pass();
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if (type == "if-style") return cont(expression, expression);
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if (type == "else-style" || type == "op") return cont(expression);
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if (type == "for") return cont(pattern, maybetype, inop, expression, expression);
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if (type == "match") return cont(expression, altbody);
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if (type == "fn") return cont(fndef);
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if (type == "macro") return cont(macro);
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return cont();
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}
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function maybeop(type) {
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if (content == ".") return cont(maybeprop);
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if (content == "::<"){return cont(typarams, maybeop);}
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if (type == "op" || content == ":") return cont(expression);
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if (type == "(" || type == "[") return matchBrackets(type, expression);
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return pass();
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}
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function maybeprop(type) {
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if (content.match(/^\w+$/)) {cx.marked = "variable"; return cont(maybeop);}
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return pass(expression);
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}
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function exprbrace(type) {
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if (type == "op") {
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if (content == "|") return cont(blockvars, poplex, pushlex("}", "block"), block);
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if (content == "||") return cont(poplex, pushlex("}", "block"), block);
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}
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if (content == "mut" || (content.match(/^\w+$/) && cx.stream.peek() == ":"
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&& !cx.stream.match("::", false)))
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return pass(record_of(expression));
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return pass(block);
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}
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function record_of(comb) {
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function ro(type) {
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if (content == "mut" || content == "with") {cx.marked = "keyword"; return cont(ro);}
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if (content.match(/^\w*$/)) {cx.marked = "variable"; return cont(ro);}
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if (type == ":") return cont(comb, ro);
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if (type == "}") return cont();
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return cont(ro);
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}
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return ro;
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}
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function blockvars(type) {
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if (type == "name") {cx.marked = "def"; return cont(blockvars);}
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if (type == "op" && content == "|") return cont();
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return cont(blockvars);
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}
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function letdef1(type) {
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if (type.match(/[\]\)\};]/)) return cont();
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if (content == "=") return cont(expression, letdef2);
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if (type == ",") return cont(letdef1);
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return pass(pattern, maybetype, letdef1);
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}
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function letdef2(type) {
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if (type.match(/[\]\)\};,]/)) return pass(letdef1);
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else return pass(expression, letdef2);
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}
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function maybetype(type) {
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if (type == ":") return cont(typecx, rtype, valcx);
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return pass();
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}
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function inop(type) {
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if (type == "name" && content == "in") {cx.marked = "keyword"; return cont();}
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return pass();
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}
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function fndef(type) {
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if (content == "@" || content == "~") {cx.marked = "keyword"; return cont(fndef);}
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if (type == "name") {cx.marked = "def"; return cont(fndef);}
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if (content == "<") return cont(typarams, fndef);
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if (type == "{") return pass(expression);
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if (type == "(") return cont(pushlex(")"), commasep(argdef, ")"), poplex, fndef);
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if (type == "->") return cont(typecx, rtype, valcx, fndef);
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if (type == ";") return cont();
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return cont(fndef);
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}
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function tydef(type) {
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if (type == "name") {cx.marked = "def"; return cont(tydef);}
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if (content == "<") return cont(typarams, tydef);
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if (content == "=") return cont(typecx, rtype, valcx);
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return cont(tydef);
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}
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function tagdef(type) {
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if (type == "name") {cx.marked = "def"; return cont(tagdef);}
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if (content == "<") return cont(typarams, tagdef);
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if (content == "=") return cont(typecx, rtype, valcx, endstatement);
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if (type == "{") return cont(pushlex("}"), typecx, tagblock, valcx, poplex);
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return cont(tagdef);
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}
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function tagblock(type) {
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if (type == "}") return cont();
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if (type == "(") return cont(pushlex(")"), commasep(rtype, ")"), poplex, tagblock);
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if (content.match(/^\w+$/)) cx.marked = "def";
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return cont(tagblock);
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}
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function mod(type) {
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if (type == "name") {cx.marked = "def"; return cont(mod);}
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if (type == "{") return cont(pushlex("}"), block, poplex);
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return pass();
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}
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function trait(type) {
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if (type == "name") {cx.marked = "def"; return cont(trait);}
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if (content == "<") return cont(typarams, trait);
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if (type == "{") return cont(pushlex("}"), block, poplex);
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return pass();
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}
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function impl(type) {
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if (content == "<") return cont(typarams, impl);
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if (content == "of" || content == "for") {cx.marked = "keyword"; return cont(rtype, impl);}
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if (type == "name") {cx.marked = "def"; return cont(impl);}
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if (type == "{") return cont(pushlex("}"), block, poplex);
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return pass();
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}
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function typarams(type) {
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if (content == ">") return cont();
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if (content == ",") return cont(typarams);
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if (content == ":") return cont(rtype, typarams);
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return pass(rtype, typarams);
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}
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function argdef(type) {
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if (type == "name") {cx.marked = "def"; return cont(argdef);}
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if (type == ":") return cont(typecx, rtype, valcx);
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return pass();
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}
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function rtype(type) {
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if (type == "name") {cx.marked = "variable-3"; return cont(rtypemaybeparam); }
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if (content == "mut") {cx.marked = "keyword"; return cont(rtype);}
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if (type == "atom") return cont(rtypemaybeparam);
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if (type == "op" || type == "obj") return cont(rtype);
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if (type == "fn") return cont(fntype);
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if (type == "{") return cont(pushlex("{"), record_of(rtype), poplex);
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return matchBrackets(type, rtype);
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}
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function rtypemaybeparam(type) {
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if (content == "<") return cont(typarams);
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return pass();
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}
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function fntype(type) {
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if (type == "(") return cont(pushlex("("), commasep(rtype, ")"), poplex, fntype);
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if (type == "->") return cont(rtype);
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return pass();
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}
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function pattern(type) {
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if (type == "name") {cx.marked = "def"; return cont(patternmaybeop);}
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if (type == "atom") return cont(patternmaybeop);
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if (type == "op") return cont(pattern);
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if (type.match(/[\]\)\};,]/)) return pass();
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return matchBrackets(type, pattern);
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}
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function patternmaybeop(type) {
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if (type == "op" && content == ".") return cont();
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if (content == "to") {cx.marked = "keyword"; return cont(pattern);}
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else return pass();
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}
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function altbody(type) {
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if (type == "{") return cont(pushlex("}", "match"), altblock1, poplex);
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return pass();
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}
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function altblock1(type) {
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if (type == "}") return cont();
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if (type == "|") return cont(altblock1);
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if (content == "when") {cx.marked = "keyword"; return cont(expression, altblock2);}
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if (type.match(/[\]\);,]/)) return cont(altblock1);
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return pass(pattern, altblock2);
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}
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function altblock2(type) {
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if (type == "{") return cont(pushlex("}", "match"), block, poplex, altblock1);
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else return pass(altblock1);
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}
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function macro(type) {
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if (type.match(/[\[\(\{]/)) return matchBrackets(type, expression);
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return pass();
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}
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function matchBrackets(type, comb) {
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if (type == "[") return cont(pushlex("]"), commasep(comb, "]"), poplex);
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if (type == "(") return cont(pushlex(")"), commasep(comb, ")"), poplex);
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if (type == "{") return cont(pushlex("}"), commasep(comb, "}"), poplex);
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return cont();
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}
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function parse(state, stream, style) {
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var cc = state.cc;
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// Communicate our context to the combinators.
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// (Less wasteful than consing up a hundred closures on every call.)
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cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc;
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while (true) {
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var combinator = cc.length ? cc.pop() : block;
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if (combinator(tcat)) {
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while(cc.length && cc[cc.length - 1].lex)
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cc.pop()();
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return cx.marked || style;
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}
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}
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}
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return {
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startState: function() {
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return {
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tokenize: tokenBase,
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cc: [],
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lexical: {indented: -indentUnit, column: 0, type: "top", align: false},
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keywords: valKeywords,
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indented: 0
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};
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},
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token: function(stream, state) {
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if (stream.sol()) {
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if (!state.lexical.hasOwnProperty("align"))
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state.lexical.align = false;
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state.indented = stream.indentation();
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}
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if (stream.eatSpace()) return null;
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tcat = content = null;
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var style = state.tokenize(stream, state);
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if (style == "comment") return style;
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if (!state.lexical.hasOwnProperty("align"))
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state.lexical.align = true;
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if (tcat == "prefix") return style;
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if (!content) content = stream.current();
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return parse(state, stream, style);
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},
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indent: function(state, textAfter) {
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if (state.tokenize != tokenBase) return 0;
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var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical,
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type = lexical.type, closing = firstChar == type;
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if (type == "stat") return lexical.indented + indentUnit;
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if (lexical.align) return lexical.column + (closing ? 0 : 1);
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return lexical.indented + (closing ? 0 : (lexical.info == "match" ? altIndentUnit : indentUnit));
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},
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electricChars: "{}"
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};
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});
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CodeMirror.defineMIME("text/x-rustsrc", "rust");
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