feat: add debug trait for node

Signed-off-by: Woshiluo Luo <woshiluo.luo@outlook.com>

Author: woshiluo

examples/qemu-virt.rs

@@ -132,15 +132,13 @@ fn main() -> Result<(), Error> {
             );
         }
 
+        println!("{:?}", t.soc);
         for current_node in t.soc.nodes().unwrap() {
             if current_node.get_parsed_name().0 == "virtio_mmio" {
                 let mmio = current_node.deserialize::<VirtIoMmio>();
                 println!("{:?} {:?}", current_node.get_parsed_name(), mmio.reg);
             }
         }
-        for current_prop in t.soc.props().unwrap() {
-            println!("{}", current_prop.get_name());
-        }
 
         // 解析过程中，设备树的内容被修改了。
         // 因此若要以其他方式再次访问设备树，先将这次解析的结果释放。

src/de_mut/node.rs

@@ -2,6 +2,7 @@
     BodyCursor, BorrowedValueDeserializer, Cursor, PropCursor, RefDtb, RegConfig,
     StructDeserializer,
 };
+use core::fmt::Debug;
 use core::marker::PhantomData;
 use serde::{de, Deserialize};
 
@@ -103,7 +104,7 @@ impl<'de> Node<'de> {
 
     /// 获得属性迭代器。
     pub const fn props<'b>(&'b self) -> Option<PropIter<'de, 'b>> {
-        match self.nodes_start {
+        match self.props_start {
             None => None,
             Some(node_cursor) => Some(PropIter {
                 node: self,
@@ -114,6 +115,42 @@ impl<'de> Node<'de> {
     }
 }
 
+impl Debug for Node<'_> {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        let props = self.props();
+        write!(f, "Props: [")?;
+        if let Some(s) = props {
+            let mut first_written = true;
+            for prop in s {
+                if first_written {
+                    write!(f, "\"{}\"", prop.get_name())?;
+                    first_written = false;
+                } else {
+                    write!(f, ",\"{}\"", prop.get_name())?;
+                }
+            }
+        }
+        write!(f, "]\n")?;
+
+        let children = self.nodes();
+        write!(f, "Children: [")?;
+        if let Some(s) = children {
+            let mut first_written = true;
+            for child in s {
+                if first_written {
+                    write!(f, "\"{}\"", child.get_full_name())?;
+                    first_written = false;
+                } else {
+                    write!(f, ",\"{}\"", child.get_full_name())?;
+                }
+            }
+        }
+        write!(f, "]\n")?;
+
+        Ok(())
+    }
+}
+
 impl<'de, 'b> Iterator for NodeIter<'de, 'b> {
     type Item = NodeItem<'de>;