__SYMBOLS = { };
local function onAutoAssemble(script,syntax)
	local multiline_comment = false;
	for i = 0,script.count - 1 do
		local line = script[i];
		if multiline_comment then
			if line:find'}' then multiline_comment = false
			end
		else
			if line:find'^registersymbol%(' then
			__SYMBOLS[#__SYMBOLS + 1] = 'un'..line:match'^registersymbol%(.-%)';
			end
			if line:find'{' then
				multiline_comment = true;
			end
		end
	end
end
registerAutoAssemblerPrologue(onAutoAssemble);
local main = getMainForm();
local btn = createButton(main);
btn.width,btn.height,btn.top,btn.left = 100,30,290,460;
btn.caption = 'clear U-symbols';
btn.onClick = function()
	autoAssemble(table.concat(__SYMBOLS,'\n'));
	__SYMBOLS = { };
end