prettyprint expressions for ayin.rs

src/ast/types.rs

@@ -262,6 +262,47 @@ impl Vector {
     }
 }
 
+impl std::fmt::Display for Expr {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let mut string = "".to_string();
+        match self {
+            Expr::Value(value) => match value {
+                Value::Int(i) => string.push_str(&format!("{i}")),
+                Value::Float(f) => string.push_str(&format!("{f:2}")),
+                Value::String(s) => string.push_str(&format!("{s:?}")),
+                Value::Boolean(b) => string.push_str(&format!("{b}")),
+                Value::Closure { .. } => string.push_str("<fn>"),
+                _ => {}
+            },
+            Expr::Func(_) => string.push_str("<fn>"),
+            Expr::Record(map) => {
+                string.push_str("{");
+                for (key, val) in map {
+                    string.push_str(&format!(" .{}: {},", key.0, val));
+                }
+                if map.len() > 0 {
+                    string.push_str(" }");
+                } else {
+                    string.push_str("}");
+                }
+            }
+            Expr::Vector(vec) => {
+                string.push_str("[");
+                for val in vec {
+                    string.push_str(&format!(" {},", val));
+                }
+                if vec.len() > 0 {
+                    string.push_str(" ]");
+                } else {
+                    string.push_str("]");
+                }
+            }
+            _ => {}
+        }
+        f.write_str(&string)
+    }
+}
+
 pub const UNIT_VALUE: Value = Value::Record(Record(BTreeMap::new()));
 pub const UNIT: Expr = Expr::Value(UNIT_VALUE);
 

src/ayin.rs

@@ -6,7 +6,7 @@ fn main() {
         Err(err) => println!("Error: {err:#?}"),
         Ok(program) => match ayin::interpret::run(program, "main".into(), vec![]) {
             Err(err) => println!("Error: {err:#?}"),
-            Ok(e) => println!("{e:#?}"),
+            Ok(e) => println!("{e}"),
         },
     }
 }