Implement NyashBox trait for core boxes - ArrayBox, BufferBox, FileBox, JSONBox, FutureBox, StreamBox, ResultBox

Co-authored-by: moe-charm <217100418+moe-charm@users.noreply.github.com>

src/boxes/file/mod.rs

@@ -2,24 +2,74 @@
 // Nyashの箱システムによるファイル入出力を提供します。
 // 参考: 既存Boxの設計思想
 
+use crate::box_trait::{NyashBox, StringBox, BoolBox};
+use std::any::Any;
 use std::fs::{File, OpenOptions};
 use std::io::{Read, Write, Result};
 
+#[derive(Debug)]
 pub struct FileBox {
     pub file: File,
+    pub path: String,
+    id: u64,
 }
 
 impl FileBox {
     pub fn open(path: &str) -> Result<Self> {
+        static mut COUNTER: u64 = 0;
+        let id = unsafe {
+            COUNTER += 1;
+            COUNTER
+        };
         let file = OpenOptions::new().read(true).write(true).create(true).open(path)?;
-        Ok(FileBox { file })
+        Ok(FileBox { 
+            file,
+            path: path.to_string(),
+            id,
+        })
     }
+    
     pub fn read_to_string(&mut self) -> Result<String> {
         let mut s = String::new();
         self.file.read_to_string(&mut s)?;
         Ok(s)
     }
+    
     pub fn write_all(&mut self, buf: &[u8]) -> Result<()> {
         self.file.write_all(buf)
     }
 }
+
+impl NyashBox for FileBox {
+    fn clone_box(&self) -> Box<dyn NyashBox> {
+        // Note: Cannot truly clone a File handle, so create a new one to the same path
+        match FileBox::open(&self.path) {
+            Ok(new_file) => Box::new(new_file),
+            Err(_) => Box::new(crate::box_trait::VoidBox::new())  // Return void on error
+        }
+    }
+
+    fn to_string_box(&self) -> StringBox {
+        StringBox::new(format!("FileBox({})", self.path))
+    }
+
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+
+    fn type_name(&self) -> &'static str {
+        "FileBox"
+    }
+
+    fn box_id(&self) -> u64 {
+        self.id
+    }
+
+    fn equals(&self, other: &dyn NyashBox) -> BoolBox {
+        if let Some(other_file) = other.as_any().downcast_ref::<FileBox>() {
+            BoolBox::new(self.path == other_file.path)
+        } else {
+            BoolBox::new(false)
+        }
+    }
+}