show stack depth

src/main.rs

@@ -36,7 +36,9 @@ pub const DISPLAY_SEGMENT_SIG_MINUS: usize = 0;
 pub const DISPLAY_SEGMENTS_EXP: usize = 2;
 pub const DISPLAY_SEGMENT_EXP_MINUS: usize = 6;
 
-type Calc = StackCalc<f32, 3, 5, u8>;
+pub const STACK_DEPTH: usize = 7;
+
+type Calc = StackCalc<f32, STACK_DEPTH, 5, u8>;
 
 struct IOSelect<'p> {
     display_no: usize,
@@ -498,7 +500,17 @@ fn main() -> ! {
         }
 
         match &state.transient {
-            TransientState::Done => number_input.show(&mut display),
+            TransientState::Done => {
+                number_input.show(&mut display);
+                for seg in display
+                    .slice(0, DISPLAY_SEGMENTS)
+                    .iter_mut()
+                    .rev()
+                    .take(calc.len())
+                {
+                    seg.dp();
+                }
+            }
             TransientState::Err { .. } => display.error(),
         }