add proceed to close out inlined atomic and var

src/prolog/codegen.rs

@@ -214,6 +214,10 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
             },
             QueryTermRef::Catch(_) =>
                 compiled_query.push(Line::Control(ControlInstruction::CatchCall)),
+            QueryTermRef::IsAtomic(_) =>
+                compiled_query.push(proceed!()),
+            QueryTermRef::IsVar(_) =>
+                compiled_query.push(proceed!()),
             QueryTermRef::Term(&Term::Constant(_, Constant::Atom(ref atom))) => {
                 let call = ControlInstruction::Call(atom.clone(), 0, pvs);
                 compiled_query.push(Line::Control(call));
@@ -252,6 +256,14 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
                 if let &mut Line::Control(ref mut ctrl) = code.last_mut().unwrap() {
                     *ctrl = ControlInstruction::ThrowExecute;
                 },
+            QueryTermRef::IsAtomic(_) => {
+                dealloc_index = code.len();
+                code.push(proceed!());
+            },
+            QueryTermRef::IsVar(_) => {
+                dealloc_index = code.len();
+                code.push(proceed!());
+            },
             _ => dealloc_index = code.len()
         };
 
@@ -288,8 +300,8 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
                             Line::Cut(CutInstruction::Cut(Terminal::Terminal))
                         });
                     },
-                    &QueryTermRef::IsAtomic(term) =>
-                        match term {
+                    &QueryTermRef::IsAtomic(inner_term) =>
+                        match inner_term {
                             &Term::AnonVar | &Term::Clause(_, _, _) | &Term::Cons(_, _, _) => {
                                 code.push(fail!()); //goto!(61, 0)); // goto false/0.
                             },
@@ -299,14 +311,15 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
                             &Term::Var(ref vr, ref name) => {
                                 let mut target = Vec::new();
 
+                                self.marker.advance(term_loc, *term); // reset self.marker.arg_c to 1.
                                 self.marker.mark_var(name, Level::Shallow, vr, term_loc, &mut target);
 
                                 code.push(Line::Query(target));
                                 code.push(is_atomic!(vr.get().norm()));
                             }
                         },
-                    &QueryTermRef::IsVar(term) =>
-                        match term {
+                    &QueryTermRef::IsVar(inner_term) =>
+                        match inner_term {
                             &Term::Constant(_, _) | &Term::Clause(_, _, _) | &Term::Cons(_, _, _) => {
                                 code.push(fail!()); //goto!(61, 0)); // goto false/0.
                             },
@@ -316,6 +329,7 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
                             &Term::Var(ref vr, ref name) => {
                                 let mut target = Vec::new();
 
+                                self.marker.advance(term_loc, *term); // reset self.marker.arg_c to 1.
                                 self.marker.mark_var(name, Level::Shallow, vr, term_loc, &mut target);
 
                                 code.push(Line::Query(target));
@@ -441,9 +455,7 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
             code.push(Line::Fact(compiled_fact));
         }
 
-        let proceed = Line::Control(ControlInstruction::Proceed);
-
-        code.push(proceed);
+        code.push(proceed!());
         code
     }
 

src/prolog/io.rs

@@ -124,6 +124,44 @@ impl fmt::Display for IndexedChoiceInstruction {
     }
 }
 
+
+impl fmt::Display for BuiltInInstruction {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            &BuiltInInstruction::CleanUpBlock =>
+                write!(f, "clean_up_block"),
+            &BuiltInInstruction::DuplicateTerm =>
+                write!(f, "duplicate_term X1"),
+            &BuiltInInstruction::EraseBall =>
+                write!(f, "erase_ball"),
+            &BuiltInInstruction::Fail =>
+                write!(f, "false"),
+            &BuiltInInstruction::GetBall =>
+                write!(f, "get_ball X1"),
+            &BuiltInInstruction::GetCurrentBlock =>
+                write!(f, "get_current_block X1"),
+            &BuiltInInstruction::InstallNewBlock =>
+                write!(f, "install_new_block"),
+            &BuiltInInstruction::InternalCallN =>
+                write!(f, "internal_call_N"),
+            &BuiltInInstruction::IsAtomic(r) =>
+                write!(f, "is_atomic {}", r),
+            &BuiltInInstruction::IsVar(r) =>
+                write!(f, "is_var {}", r),
+            &BuiltInInstruction::ResetBlock =>
+                write!(f, "reset_block"),
+            &BuiltInInstruction::SetBall =>
+                write!(f, "set_ball"),
+            &BuiltInInstruction::Succeed =>
+                write!(f, "true"),
+            &BuiltInInstruction::Unify =>
+                write!(f, "unify"),
+            &BuiltInInstruction::UnwindStack =>
+                write!(f, "unwind_stack")
+        }
+    }
+}
+
 impl fmt::Display for ChoiceInstruction {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
@@ -202,7 +240,8 @@ pub fn print_code(code: &Code) {
                 for fact_instr in fact {
                     println!("{}", fact_instr);
                 },
-            &Line::BuiltIn(_) => {},
+            &Line::BuiltIn(ref instr) =>
+                println!("{}", instr),
             &Line::Cut(ref cut) =>
                 println!("{}", cut),
             &Line::Choice(ref choice) =>