vm: allow vm description to be callable as function.

* lib.c (generic_funall): Handle vm-desc objects via
vm_execute_toplevel.

* vm.h (vm_desc_s, vm_closure_s): Declared.

2 files changed, 6 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 980fe768..7219d2d2 100644
--- a/lib.c
+++ b/lib.c
@@ -6253,6 +6253,10 @@ val generic_funcall(val fun, struct args *args_in)
       default:
         callerror(fun, lit("too many arguments"));
       }
+    } else if (fun->co.cls == vm_desc_s) {
+      if (args->fill || args->list)
+        callerror(fun, lit("too many arguments"));
+      return vm_execute_toplevel(fun);
     } else if (fun->co.cls == carray_s) {
       goto carray;
     } else if (obj_struct_p(fun)) {
diff --git a/vm.h b/vm.h
index 1a8a1c8e..da2fab08 100644
--- a/vm.h
+++ b/vm.h
@@ -25,6 +25,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+extern val vm_desc_s, vm_closure_s;
+
 val vm_make_desc(val nlevels, val nregs, val bytecode,
                  val datavec, val funvec);
 val vm_execute_toplevel(val desc);