Implementing new types

- nil symbols
- Bool
- Vectors
- Maps

src/printer.rs

@@ -2,8 +2,10 @@ use crate::types::MalType;
 
 pub fn pr_str(ast: &MalType) -> String {
     match ast {
+        MalType::Nil => "nil".to_string(),
         MalType::Symbol(sym) => sym.to_string(),
         MalType::Integer(val) => val.to_string(),
+        MalType::Bool(val) => val.to_string(),
         MalType::List(el) => format!(
             "({})",
             el.iter()
@@ -11,5 +13,20 @@ pub fn pr_str(ast: &MalType) -> String {
                 .collect::<Vec<String>>()
                 .join(" ")
         ),
+        // This is truly horrible
+        MalType::Vector(el) => format!(
+            "[{}]",
+            el.iter()
+                .map(|sub| pr_str(sub))
+                .collect::<Vec<String>>()
+                .join(" ")
+        ),
+        MalType::Map(el) => format!(
+            "{{{}}}",
+            el.iter()
+                .map(|sub| vec![pr_str(sub.0), pr_str(sub.1)].join(" "))
+                .collect::<Vec<String>>()
+                .join(" ")
+        ),
     }
 }