function op(left, op, right)
{
	this.left = left;
	if (op instanceof Array) {
		op = op[0];
	}
	this.op = op;
	this.right = right;
}
op.prototype.valueOf = function(indent) {
	return this.left.valueOf(indent) + ' ' + this.op.valueOf(indent) + ' ' + this.right.valueOf(indent);
};

function symbol(name, symbols)
{
	this.name = name;
	this.symbols = symbols;
	this.dirty = false;
}
symbol.prototype.cleanName = function() {
	return this.name[0] == ':' ? this.name.substr(1) : this.name;
}
symbol.prototype.valueOf = function() {
	return this.name;
};

function intlit(val, bits, unsigned)
{
	if (!bits) {
		bits = 32;
	}
	if (unsigned === undefined) {
		unsigned = false;
	}
	this.unsigned = unsigned;
	this.bits = bits;
	this.val = val;
}
intlit.prototype.valueOf = function() {
	var val = '' + this.val;
	if (this.bits != 32 || this.unsigned) {
		val += this.unsigned ? 'u' : 'i'
		val += this.bits;
	}
	return val;
};

function floatlit(val)
{
	this.val = val;
}
floatlit.prototype.valueOf = function() {
	return '' + val;
};

function strlit(val)
{
	this.val = val;
}
strlit.prototype.valueOf = function() {
	return '"'+this.val+'"';
};

function listlit(val)
{
	this.val = val;
}
listlit.prototype.valueOf = function(indent) {
	if (indent === undefined) {
		indent = '';
	}
	var nextindent = indent + '\t';
	var val = '['
	for (var i = 0; i < this.val.length; i++) {
		val += '\n' + nextindent + this.val[i].valueOf(nextindent);
	}
	if (this.val.length) {
		val += '\n' + indent;
	}
	val += ']';
	return val;
};

function arraylit(val)
{
	this.val = val;
}
arraylit.prototype.valueOf = function(indent) {
	if (indent === undefined) {
		indent = '';
	}
	var nextindent = indent + '\t';
	var val = '#['
	for (var i = 0; i < this.val.length; i++) {
		val += '\n' + nextindent + this.val[i].valueOf(nextindent);
	}
	if (this.val.length) {
		val += '\n' + indent;
	}
	val += ']';
	return val;
};

function funcall(name, args)
{
	this.name = name;
	this.args = args;
	this.receiver = null;
	this.dirty = false;
}
funcall.prototype.valueOf = function(indent) {
	var parts = this.name.split(':');
	var val = '';
	if (this.receiver) {
		val += this.receiver.valueOf(indent);
	}
	var curarg = 0;
	for (var i = 0; i < parts.length; i++) {
		if (val) {
			val += ' ';
		}
		if (parts[i]) {
			val += parts[i] + ': ';
		}
		if (curarg < this.args.length) {
			val += this.args[curarg++].valueOf(indent);
		}
	}
	while (curarg < this.args.length) {
		val += ' ' + this.args[curarg++].valueOf(indent);
	}
	return val;
};

function object(messages)
{
	this.messages = messages;
	this.name = null;
}
object.prototype.valueOf = function(indent) {
	if (indent === undefined) {
		indent = '';
	}
	var nextindent = indent + '\t';
	var val = '#{';
	for (var i = 0; i < this.messages.length; i++) {
		val += '\n' + nextindent +  this.messages[i].valueOf(nextindent);
	}
	if (val.length > 2) {
		val += '\n' + indent;
	}
	val += '}';
	return val;
};

function lambda(args, expressions)
{
	this.args = args ? args : [];
	this.expressions = expressions;
}
lambda.prototype.valueOf = function(indent) {
	if (indent === undefined) {
		indent = '';
	}
	var nextindent = indent + '\t';
	var val = '';
	for (var i = 0; i < this.args.length; i++) {
		val += this.args[i].valueOf(indent) + ' ';
	}
	val += '{';
	for (var i = 0; i < this.expressions.length; i++) {
		val += '\n' + nextindent + this.expressions[i].valueOf(nextindent);
	}
	if (this.expressions.length) {
		val += '\n' + indent;
	}
	val += '}';
	return val;
};

function assignment(sym, expr)
{
	this.symbol = sym;
	this.expression = expr;
}
assignment.prototype.valueOf = function(indent) {
	return this.symbol.valueOf(indent) + ' <- ' + this.expression.valueOf(indent);
};

function isLambda(node)
{
	return node instanceof lambda;
}

var grammar =
'start = ws module:(object / lambda) ws { return module; };' +
'ws = ([ \\t\\n\\r] / "//" [^\\n]* "\\n")*;' +
'hws = ([ \\t] / "/*" ([^*] / "*" ! "/")* "*/" )*;' +
'expr = e:(funcall / methcall / assignment / opexpr) ws { return e; };' +
'opexpr = left:compareop pieces:(hws ("&&" / "||") ws compareop)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+
'compareop = left:maybecons pieces:(hws ("<=" / ">=" / "<" / ">" / "=" / "!=") ws maybecons)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+
'maybecons = consop / addsub;' +
'consop = left:addsub hws "|" ws right:maybecons { return new op(left, "|", right); };'+
'addsub = left:muldiv pieces:(hws ((("xor"/"and"/"or") ! [a-zA-Z_!?@0-9])/("+"/"-"/".")) ws muldiv)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+
'muldiv = left:primlitsym pieces:(hws ("*"/"/"/"%") ws primlitsym)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+
'primlitsym = hws val:(float / hex / binary / int / string / symbol / object / array / list / lambda / "(" ws expr:expr hws ")" { return expr; }) { return val; };' +
'symbol = chars:[a-zA-Z_!?@]+ trailing:(":"? [a-zA-Z_!?@0-9])* ! ":" { for (var i = 0; i < trailing.length; i++) { trailing[i] = trailing[i].join(""); } return new symbol(chars.join("") + trailing.join("")); };' +
'float = digits:[0-9]+ "." decimals:[0-9]+ { return new floatlit(parseFloat(digits.join("") + "." + decimals.join(""))); };' +
'binary = "0b" digits:[01]+ { return new intlit(parseInt(digits.join(""), 2)); };' +
'hex = "0x" digits:[0-9a-fA-F]+ size:([iu] ("8" / "16" / "32" / "64"))? { var bits = size ? parseInt(size[1], 10) : 0; return new intlit(parseInt(digits.join(""), 16), bits, size[0] == "u"); };' +
'int = sign:"-"? digits:[0-9]+ size:([iu] ("8" / "16" / "32" / "64"))? { var bits = size ? parseInt(size[1], 10) : 0; return new intlit(parseInt(sign + digits.join(""), 10), bits, size[0] == "u"); };' +
'string = "\\"" text:(strpart/escape)* "\\"" { return new strlit(text.join("")); };' +
'strpart = text:[^\\"\\\\]+ { return text.join(""); };' +
'escape = "\\\\" char:[nt\\"r\\\\] { if (char == "n") { return "\\n"; } if (char == "r") { return "\\r"; } if (char == "t") { return "\\t"; } return char; };' +
'object = "#{" ws messages:(assignment / funexpr)* "}" { return new object(messages); };' +
'array = "#[" ws els:expr* "]" { return new arraylit(els); };' +
'list = "[" ws els:expr* "]" { return new listlit(els); };' +
'opsym = name:("&&" / "||" / "<=" / ">=" / "<" / ">" / "=" / "!=" / "+" / "-" / "." / "*" / "/" / "%" / "|") { return new symbol(name); };' +
'assignment = ws sym:(opsym / symbol) hws "<-" expr:expr ws { return new assignment(sym, expr); }' +
'lambda = args:((& ":") argname+  )? "{" ws exprs:expr* "}" { return new lambda(args[1], exprs); };' +
'argname = init:":"? chars:[a-zA-Z_!?@]+ trailing:[a-zA-Z_!?@0-9]* hws { return new symbol(init + chars.join("") + trailing.join("")); };' +
'funexpr = f: funcall ws { return f; };' +
'funcall = hws parts: funcallpart+ { var fun = ""; var args = []; for (var i = 0; i < parts.length; i++) { fun += parts[i].name; args = args.concat(parts[i].args); } return new funcall(fun, args); };' +
'funcallpart = fun:funpart args:opexpr* hws { return { name: fun, args: args}; };' +
'funpart = chars:[a-zA-Z_!?@]+ middle:[a-zA-Z_!?@0-9]* ":" & [ \\t\\n\\r] { return chars.join("") + middle.join("") + ":"; };' +
'methcall = receiver:opexpr hws info:methcallrest { info.receiver = receiver; return info; };' +
'methcallrest = funcall / unarymeth;' +
'unarymeth = name:symbol { return new funcall(name.name, []); };';
var parser = PEG.buildParser(grammar);