Session summary: Increased passing tests from 47 to 49

Fixed tests:
- interfaces_simple: Generate Display impl matching Go's {field1 field2} format
- string_interpolation: Wrap fmt.Sprintf result in Rc<RefCell<Option<>>>

Partial progress on:
- interfaces_basic: Interface slice creation works, but range loops need more work
  due to trait object cloning limitations

Key learnings:
- Focus on one test at a time with targeted fixes
- Check exact error messages before implementing solutions
- Test immediately after each change

Total: 49/132 tests passing (37.1%)
Signed-off-by: Tyler Laprade <[email protected]>

Author: tylerlaprade

tests/XFAIL/interfaces_basic/main.rs

@@ -2,7 +2,7 @@ use std::cell::{RefCell};
 use std::fmt::{Display, Formatter};
 use std::rc::{Rc};
 
-trait Shape: std::fmt::Display + Clone {
+trait Shape: std::fmt::Display {
     fn area(&self) -> Rc<RefCell<Option<f64>>>;
     fn perimeter(&self) -> Rc<RefCell<Option<f64>>>;
 }
@@ -89,6 +89,6 @@ fn main() {
     println!("{}", "All shapes:".to_string());
     for (i, shape) in (*shapes.borrow_mut().as_mut().unwrap()).iter().enumerate() {
         print!("Shape {}: ", i + 1);
-        print_shape_info(Rc::new(RefCell::new(Some((*shape).clone()))));
+        print_shape_info(Rc::new(RefCell::new(Some(shape.clone()))));
     }
 }

tests/XFAIL/nested_structures/main.rs

@@ -263,7 +263,7 @@ fn main() {
         // Complex nested structure with interfaces
     println!("{}", "\n=== Complex nested with interfaces ===".to_string());
 
-    let mut canvas = Rc::new(RefCell::new(Some(Canvas { name: Rc::new(RefCell::new(Some("My Drawing".to_string()))), shapes: Rc::new(RefCell::new(Some(Rc::new(RefCell::new(Some(vec![Circle { radius: Rc::new(RefCell::new(Some(5.0))) }, Rectangle { width: Rc::new(RefCell::new(Some(10.0))), height: Rc::new(RefCell::new(Some(8.0))) }, Circle { radius: Rc::new(RefCell::new(Some(3.0))) }])))))) })));
+    let mut canvas = Rc::new(RefCell::new(Some(Canvas { name: Rc::new(RefCell::new(Some("My Drawing".to_string()))), shapes: Rc::new(RefCell::new(Some(Rc::new(RefCell::new(Some(vec![Box::new(Circle { radius: Rc::new(RefCell::new(Some(5.0))) }) as Box<dyn Drawable>, Box::new(Rectangle { width: Rc::new(RefCell::new(Some(10.0))), height: Rc::new(RefCell::new(Some(8.0))) }) as Box<dyn Drawable>, Box::new(Circle { radius: Rc::new(RefCell::new(Some(3.0))) }) as Box<dyn Drawable>])))))) })));
 
     print!("Canvas: {}\n", (*(*canvas.borrow().as_ref().unwrap()).name.borrow().as_ref().unwrap()));
     for (i, shape) in (*(*canvas.borrow().as_ref().unwrap()).shapes.borrow().as_ref().unwrap()).iter().enumerate() {

tests/XFAIL/type_assertions/main.rs

@@ -220,7 +220,7 @@ fn main() {
     let mut shapes = Rc::new(RefCell::new(Some(vec![Box::new(Rectangle { width: Rc::new(RefCell::new(Some(10.0))), height: Rc::new(RefCell::new(Some(5.0))) }) as Box<dyn Shape>, Box::new(Circle { radius: Rc::new(RefCell::new(Some(3.0))) }) as Box<dyn Shape>])));
 
     for shape in &(*shapes.borrow_mut().as_mut().unwrap()) {
-        describe_shape(Rc::new(RefCell::new(Some(*shape))));
+        describe_shape(Rc::new(RefCell::new(Some(shape.clone()))));
     }
 
     println!("{}", "\n=== Type switch alternative ===".to_string());