#include "item.hh"
#include "output-def.hh"
#include "paper-score.hh"
-#include "simple-closure.hh"
#include "system.hh"
#include "unpure-pure-container.hh"
#include "warn.hh" // error ()
LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
if (!ly_is_procedure (val)
- && !unsmob<Simple_closure> (val)
&& !type_check_assignment (sym, val, ly_symbol2scm ("backend-type?")))
error ("typecheck failed");