Add CodeObject::display_expand_codeobjects

bytecode/src/bytecode.rs

@@ -348,10 +348,13 @@ impl CodeObject {
             }
         })
     }
-}
 
-impl fmt::Display for CodeObject {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn display_inner(
+        &self,
+        f: &mut fmt::Formatter,
+        expand_codeobjects: bool,
+        level: usize,
+    ) -> fmt::Result {
         let label_targets: HashSet<&usize> = self.label_map.values().collect();
         for (offset, instruction) in self.instructions.iter().enumerate() {
             let arrow = if label_targets.contains(&offset) {
@@ -359,15 +362,40 @@ impl fmt::Display for CodeObject {
             } else {
                 "  "
             };
-            write!(f, "          {} {:5} ", arrow, offset)?;
-            instruction.fmt_dis(f, &self.label_map)?;
+            for _ in 0..level {
+                write!(f, "          ")?;
+            }
+            write!(f, "{} {:5} ", arrow, offset)?;
+            instruction.fmt_dis(f, &self.label_map, expand_codeobjects, level)?;
         }
         Ok(())
     }
+
+    pub fn display_expand_codeobjects<'a>(&'a self) -> impl fmt::Display + 'a {
+        struct Display<'a>(&'a CodeObject);
+        impl fmt::Display for Display<'_> {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                self.0.display_inner(f, true, 1)
+            }
+        }
+        Display(self)
+    }
+}
+
+impl fmt::Display for CodeObject {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.display_inner(f, false, 1)
+    }
 }
 
 impl Instruction {
-    fn fmt_dis(&self, f: &mut fmt::Formatter, label_map: &HashMap<Label, usize>) -> fmt::Result {
+    fn fmt_dis(
+        &self,
+        f: &mut fmt::Formatter,
+        label_map: &HashMap<Label, usize>,
+        expand_codeobjects: bool,
+        level: usize,
+    ) -> fmt::Result {
         macro_rules! w {
             ($variant:ident) => {
                 write!(f, "{:20}\n", stringify!($variant))
@@ -410,7 +438,14 @@ impl Instruction {
             DeleteSubscript => w!(DeleteSubscript),
             StoreAttr { name } => w!(StoreAttr, name),
             DeleteAttr { name } => w!(DeleteAttr, name),
-            LoadConst { value } => w!(LoadConst, value),
+            LoadConst { value } => match value {
+                Constant::Code { code } if expand_codeobjects => {
+                    writeln!(f, "LoadConst ({:?}):", code)?;
+                    code.display_inner(f, true, level + 1)?;
+                    Ok(())
+                }
+                _ => w!(LoadConst, value),
+            },
             UnaryOperation { op } => w!(UnaryOperation, format!("{:?}", op)),
             BinaryOperation { op, inplace } => w!(BinaryOperation, format!("{:?}", op), inplace),
             LoadAttr { name } => w!(LoadAttr, name),