Starting to add no arg tag union

compiler/can/src/expr.rs

@@ -158,6 +158,14 @@ pub enum Expr {
         arguments: Vec<(Variable, Located<Expr>)>,
     },
 
+    ZeroArgumentTag {
+        closure_name: Symbol,
+        variant_var: Variable,
+        ext_var: Variable,
+        name: TagName,
+        arguments: Vec<(Variable, Located<Expr>)>,
+    },
+
     // Test
     Expect(Box<Located<Expr>>, Box<Located<Expr>>),
 
@@ -1427,6 +1435,23 @@ pub fn inline_calls(var_store: &mut VarStore, scope: &mut Scope, expr: Expr) ->
             );
         }
 
+        ZeroArgumentTag {
+            closure_name,
+            variant_var,
+            ext_var,
+            name,
+            arguments,
+        } => {
+            todo!(
+                "Inlining for ZeroArgumentTag with closure_name {:?}, variant_var {:?}, ext_var {:?}, name {:?}, arguments {:?}",
+                closure_name,
+                variant_var,
+                ext_var,
+                name,
+                arguments
+            );
+        }
+
         Call(boxed_tuple, args, called_via) => {
             let (fn_var, loc_expr, closure_var, expr_var) = *boxed_tuple;