Removed unnecessary option return type

parser/src/ast.rs

@@ -47,7 +47,7 @@ pub enum TopLevel {
         export: bool,
         name: String,
         params: ParamList,
-        return_type: Option<TypeExpr>,
+        return_type: TypeExpr,
         body: Block,
     },
 }

parser/src/lib.rs

@@ -100,7 +100,7 @@ impl TryFrom<pest::iterators::Pair<'_, Rule>> for TopLevel {
                     false
                 };
 
-                let return_type = Some(TypeExpr::from(inner.next().unwrap()));
+                let return_type = TypeExpr::from(inner.next().unwrap());
 
                 let name = inner.next().unwrap().as_str().to_string();
                 let params = if inner.peek().unwrap().as_rule() == Rule::param_list {

src/codegen.rs

@@ -217,12 +217,13 @@ impl ToRust for TopLevel {
                     .collect::<Vec<_>>()
                     .join(", ");
 
-                let ret = return_type
-                    .as_ref()
-                    .map(|t| format!(" -> {}", t.get_rust()))
-                    .unwrap_or_default();
-
-                cg.addln(&format!("{}fn {}({}){} {{", vis, name, params_str, ret));
+                cg.addln(&format!(
+                    "{}fn {}({}) -> {} {{",
+                    vis,
+                    name,
+                    params_str,
+                    return_type.get_rust()
+                ));
                 cg.indent += 1;
                 body.to_rust(cg);
                 cg.indent -= 1;