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rust.js
451 lines | 15.7 KiB | application/javascript | JavascriptLexer
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE
(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror"));
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";
CodeMirror.defineMode("rust", function() {
var indentUnit = 4, altIndentUnit = 2;
var valKeywords = {
"if": "if-style", "while": "if-style", "loop": "else-style", "else": "else-style",
"do": "else-style", "ret": "else-style", "fail": "else-style",
"break": "atom", "cont": "atom", "const": "let", "resource": "fn",
"let": "let", "fn": "fn", "for": "for", "alt": "alt", "iface": "iface",
"impl": "impl", "type": "type", "enum": "enum", "mod": "mod",
"as": "op", "true": "atom", "false": "atom", "assert": "op", "check": "op",
"claim": "op", "native": "ignore", "unsafe": "ignore", "import": "else-style",
"export": "else-style", "copy": "op", "log": "op", "log_err": "op",
"use": "op", "bind": "op", "self": "atom", "struct": "enum"
};
var typeKeywords = function() {
var keywords = {"fn": "fn", "block": "fn", "obj": "obj"};
var atoms = "bool uint int i8 i16 i32 i64 u8 u16 u32 u64 float f32 f64 str char".split(" ");
for (var i = 0, e = atoms.length; i < e; ++i) keywords[atoms[i]] = "atom";
return keywords;
}();
var operatorChar = /[+\-*&%=<>!?|\.@]/;
// Tokenizer
// Used as scratch variable to communicate multiple values without
// consing up tons of objects.
var tcat, content;
function r(tc, style) {
tcat = tc;
return style;
}
function tokenBase(stream, state) {
var ch = stream.next();
if (ch == '"') {
state.tokenize = tokenString;
return state.tokenize(stream, state);
}
if (ch == "'") {
tcat = "atom";
if (stream.eat("\\")) {
if (stream.skipTo("'")) { stream.next(); return "string"; }
else { return "error"; }
} else {
stream.next();
return stream.eat("'") ? "string" : "error";
}
}
if (ch == "/") {
if (stream.eat("/")) { stream.skipToEnd(); return "comment"; }
if (stream.eat("*")) {
state.tokenize = tokenComment(1);
return state.tokenize(stream, state);
}
}
if (ch == "#") {
if (stream.eat("[")) { tcat = "open-attr"; return null; }
stream.eatWhile(/\w/);
return r("macro", "meta");
}
if (ch == ":" && stream.match(":<")) {
return r("op", null);
}
if (ch.match(/\d/) || (ch == "." && stream.eat(/\d/))) {
var flp = false;
if (!stream.match(/^x[\da-f]+/i) && !stream.match(/^b[01]+/)) {
stream.eatWhile(/\d/);
if (stream.eat(".")) { flp = true; stream.eatWhile(/\d/); }
if (stream.match(/^e[+\-]?\d+/i)) { flp = true; }
}
if (flp) stream.match(/^f(?:32|64)/);
else stream.match(/^[ui](?:8|16|32|64)/);
return r("atom", "number");
}
if (ch.match(/[()\[\]{}:;,]/)) return r(ch, null);
if (ch == "-" && stream.eat(">")) return r("->", null);
if (ch.match(operatorChar)) {
stream.eatWhile(operatorChar);
return r("op", null);
}
stream.eatWhile(/\w/);
content = stream.current();
if (stream.match(/^::\w/)) {
stream.backUp(1);
return r("prefix", "variable-2");
}
if (state.keywords.propertyIsEnumerable(content))
return r(state.keywords[content], content.match(/true|false/) ? "atom" : "keyword");
return r("name", "variable");
}
function tokenString(stream, state) {
var ch, escaped = false;
while (ch = stream.next()) {
if (ch == '"' && !escaped) {
state.tokenize = tokenBase;
return r("atom", "string");
}
escaped = !escaped && ch == "\\";
}
// Hack to not confuse the parser when a string is split in
// pieces.
return r("op", "string");
}
function tokenComment(depth) {
return function(stream, state) {
var lastCh = null, ch;
while (ch = stream.next()) {
if (ch == "/" && lastCh == "*") {
if (depth == 1) {
state.tokenize = tokenBase;
break;
} else {
state.tokenize = tokenComment(depth - 1);
return state.tokenize(stream, state);
}
}
if (ch == "*" && lastCh == "/") {
state.tokenize = tokenComment(depth + 1);
return state.tokenize(stream, state);
}
lastCh = ch;
}
return "comment";
};
}
// Parser
var cx = {state: null, stream: null, marked: null, cc: null};
function pass() {
for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
}
function cont() {
pass.apply(null, arguments);
return true;
}
function pushlex(type, info) {
var result = function() {
var state = cx.state;
state.lexical = {indented: state.indented, column: cx.stream.column(),
type: type, prev: state.lexical, info: info};
};
result.lex = true;
return result;
}
function poplex() {
var state = cx.state;
if (state.lexical.prev) {
if (state.lexical.type == ")")
state.indented = state.lexical.indented;
state.lexical = state.lexical.prev;
}
}
function typecx() { cx.state.keywords = typeKeywords; }
function valcx() { cx.state.keywords = valKeywords; }
poplex.lex = typecx.lex = valcx.lex = true;
function commasep(comb, end) {
function more(type) {
if (type == ",") return cont(comb, more);
if (type == end) return cont();
return cont(more);
}
return function(type) {
if (type == end) return cont();
return pass(comb, more);
};
}
function stat_of(comb, tag) {
return cont(pushlex("stat", tag), comb, poplex, block);
}
function block(type) {
if (type == "}") return cont();
if (type == "let") return stat_of(letdef1, "let");
if (type == "fn") return stat_of(fndef);
if (type == "type") return cont(pushlex("stat"), tydef, endstatement, poplex, block);
if (type == "enum") return stat_of(enumdef);
if (type == "mod") return stat_of(mod);
if (type == "iface") return stat_of(iface);
if (type == "impl") return stat_of(impl);
if (type == "open-attr") return cont(pushlex("]"), commasep(expression, "]"), poplex);
if (type == "ignore" || type.match(/[\]\);,]/)) return cont(block);
return pass(pushlex("stat"), expression, poplex, endstatement, block);
}
function endstatement(type) {
if (type == ";") return cont();
return pass();
}
function expression(type) {
if (type == "atom" || type == "name") return cont(maybeop);
if (type == "{") return cont(pushlex("}"), exprbrace, poplex);
if (type.match(/[\[\(]/)) return matchBrackets(type, expression);
if (type.match(/[\]\)\};,]/)) return pass();
if (type == "if-style") return cont(expression, expression);
if (type == "else-style" || type == "op") return cont(expression);
if (type == "for") return cont(pattern, maybetype, inop, expression, expression);
if (type == "alt") return cont(expression, altbody);
if (type == "fn") return cont(fndef);
if (type == "macro") return cont(macro);
return cont();
}
function maybeop(type) {
if (content == ".") return cont(maybeprop);
if (content == "::<"){return cont(typarams, maybeop);}
if (type == "op" || content == ":") return cont(expression);
if (type == "(" || type == "[") return matchBrackets(type, expression);
return pass();
}
function maybeprop() {
if (content.match(/^\w+$/)) {cx.marked = "variable"; return cont(maybeop);}
return pass(expression);
}
function exprbrace(type) {
if (type == "op") {
if (content == "|") return cont(blockvars, poplex, pushlex("}", "block"), block);
if (content == "||") return cont(poplex, pushlex("}", "block"), block);
}
if (content == "mutable" || (content.match(/^\w+$/) && cx.stream.peek() == ":"
&& !cx.stream.match("::", false)))
return pass(record_of(expression));
return pass(block);
}
function record_of(comb) {
function ro(type) {
if (content == "mutable" || content == "with") {cx.marked = "keyword"; return cont(ro);}
if (content.match(/^\w*$/)) {cx.marked = "variable"; return cont(ro);}
if (type == ":") return cont(comb, ro);
if (type == "}") return cont();
return cont(ro);
}
return ro;
}
function blockvars(type) {
if (type == "name") {cx.marked = "def"; return cont(blockvars);}
if (type == "op" && content == "|") return cont();
return cont(blockvars);
}
function letdef1(type) {
if (type.match(/[\]\)\};]/)) return cont();
if (content == "=") return cont(expression, letdef2);
if (type == ",") return cont(letdef1);
return pass(pattern, maybetype, letdef1);
}
function letdef2(type) {
if (type.match(/[\]\)\};,]/)) return pass(letdef1);
else return pass(expression, letdef2);
}
function maybetype(type) {
if (type == ":") return cont(typecx, rtype, valcx);
return pass();
}
function inop(type) {
if (type == "name" && content == "in") {cx.marked = "keyword"; return cont();}
return pass();
}
function fndef(type) {
if (content == "@" || content == "~") {cx.marked = "keyword"; return cont(fndef);}
if (type == "name") {cx.marked = "def"; return cont(fndef);}
if (content == "<") return cont(typarams, fndef);
if (type == "{") return pass(expression);
if (type == "(") return cont(pushlex(")"), commasep(argdef, ")"), poplex, fndef);
if (type == "->") return cont(typecx, rtype, valcx, fndef);
if (type == ";") return cont();
return cont(fndef);
}
function tydef(type) {
if (type == "name") {cx.marked = "def"; return cont(tydef);}
if (content == "<") return cont(typarams, tydef);
if (content == "=") return cont(typecx, rtype, valcx);
return cont(tydef);
}
function enumdef(type) {
if (type == "name") {cx.marked = "def"; return cont(enumdef);}
if (content == "<") return cont(typarams, enumdef);
if (content == "=") return cont(typecx, rtype, valcx, endstatement);
if (type == "{") return cont(pushlex("}"), typecx, enumblock, valcx, poplex);
return cont(enumdef);
}
function enumblock(type) {
if (type == "}") return cont();
if (type == "(") return cont(pushlex(")"), commasep(rtype, ")"), poplex, enumblock);
if (content.match(/^\w+$/)) cx.marked = "def";
return cont(enumblock);
}
function mod(type) {
if (type == "name") {cx.marked = "def"; return cont(mod);}
if (type == "{") return cont(pushlex("}"), block, poplex);
return pass();
}
function iface(type) {
if (type == "name") {cx.marked = "def"; return cont(iface);}
if (content == "<") return cont(typarams, iface);
if (type == "{") return cont(pushlex("}"), block, poplex);
return pass();
}
function impl(type) {
if (content == "<") return cont(typarams, impl);
if (content == "of" || content == "for") {cx.marked = "keyword"; return cont(rtype, impl);}
if (type == "name") {cx.marked = "def"; return cont(impl);}
if (type == "{") return cont(pushlex("}"), block, poplex);
return pass();
}
function typarams() {
if (content == ">") return cont();
if (content == ",") return cont(typarams);
if (content == ":") return cont(rtype, typarams);
return pass(rtype, typarams);
}
function argdef(type) {
if (type == "name") {cx.marked = "def"; return cont(argdef);}
if (type == ":") return cont(typecx, rtype, valcx);
return pass();
}
function rtype(type) {
if (type == "name") {cx.marked = "variable-3"; return cont(rtypemaybeparam); }
if (content == "mutable") {cx.marked = "keyword"; return cont(rtype);}
if (type == "atom") return cont(rtypemaybeparam);
if (type == "op" || type == "obj") return cont(rtype);
if (type == "fn") return cont(fntype);
if (type == "{") return cont(pushlex("{"), record_of(rtype), poplex);
return matchBrackets(type, rtype);
}
function rtypemaybeparam() {
if (content == "<") return cont(typarams);
return pass();
}
function fntype(type) {
if (type == "(") return cont(pushlex("("), commasep(rtype, ")"), poplex, fntype);
if (type == "->") return cont(rtype);
return pass();
}
function pattern(type) {
if (type == "name") {cx.marked = "def"; return cont(patternmaybeop);}
if (type == "atom") return cont(patternmaybeop);
if (type == "op") return cont(pattern);
if (type.match(/[\]\)\};,]/)) return pass();
return matchBrackets(type, pattern);
}
function patternmaybeop(type) {
if (type == "op" && content == ".") return cont();
if (content == "to") {cx.marked = "keyword"; return cont(pattern);}
else return pass();
}
function altbody(type) {
if (type == "{") return cont(pushlex("}", "alt"), altblock1, poplex);
return pass();
}
function altblock1(type) {
if (type == "}") return cont();
if (type == "|") return cont(altblock1);
if (content == "when") {cx.marked = "keyword"; return cont(expression, altblock2);}
if (type.match(/[\]\);,]/)) return cont(altblock1);
return pass(pattern, altblock2);
}
function altblock2(type) {
if (type == "{") return cont(pushlex("}", "alt"), block, poplex, altblock1);
else return pass(altblock1);
}
function macro(type) {
if (type.match(/[\[\(\{]/)) return matchBrackets(type, expression);
return pass();
}
function matchBrackets(type, comb) {
if (type == "[") return cont(pushlex("]"), commasep(comb, "]"), poplex);
if (type == "(") return cont(pushlex(")"), commasep(comb, ")"), poplex);
if (type == "{") return cont(pushlex("}"), commasep(comb, "}"), poplex);
return cont();
}
function parse(state, stream, style) {
var cc = state.cc;
// Communicate our context to the combinators.
// (Less wasteful than consing up a hundred closures on every call.)
cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc;
while (true) {
var combinator = cc.length ? cc.pop() : block;
if (combinator(tcat)) {
while(cc.length && cc[cc.length - 1].lex)
cc.pop()();
return cx.marked || style;
}
}
}
return {
startState: function() {
return {
tokenize: tokenBase,
cc: [],
lexical: {indented: -indentUnit, column: 0, type: "top", align: false},
keywords: valKeywords,
indented: 0
};
},
token: function(stream, state) {
if (stream.sol()) {
if (!state.lexical.hasOwnProperty("align"))
state.lexical.align = false;
state.indented = stream.indentation();
}
if (stream.eatSpace()) return null;
tcat = content = null;
var style = state.tokenize(stream, state);
if (style == "comment") return style;
if (!state.lexical.hasOwnProperty("align"))
state.lexical.align = true;
if (tcat == "prefix") return style;
if (!content) content = stream.current();
return parse(state, stream, style);
},
indent: function(state, textAfter) {
if (state.tokenize != tokenBase) return 0;
var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical,
type = lexical.type, closing = firstChar == type;
if (type == "stat") return lexical.indented + indentUnit;
if (lexical.align) return lexical.column + (closing ? 0 : 1);
return lexical.indented + (closing ? 0 : (lexical.info == "alt" ? altIndentUnit : indentUnit));
},
electricChars: "{}",
blockCommentStart: "/*",
blockCommentEnd: "*/",
lineComment: "//",
fold: "brace"
};
});
CodeMirror.defineMIME("text/x-rustsrc", "rust");
});