[Vala] How to compile

[Denis Cheremisov <denis-cheremisov yandex ru>]

Hello! I'm a noob here, so I don't know the basic things. How to compile
svn version from  `svn co http://svn.gnome.org/svn/vala/trunk vala`? I
tried with 0.1.4.1 from the Debian repo, but it swears on the code like
this:
foreach (CCodeFormalParameter param in parameters) { - it says:
" error: syntax error, unexpected in, expecting )"

I suppose it is because of "operator in within enumeration".
Or can you point me at the basic tutorial :)