New syntax that's easier to parse, parsing doesn't need variable lookup

expr.h

@@ -1,5 +1,11 @@
 #pragma once
 typedef struct Expr Expr;
+typedef struct Typespec Typespec;
+
+typedef enum Expr_Sizeof_Kind{
+  SIZEOF_Expr,
+  SIZEOF_Type,
+}Expr_Sizeof_Kind;
 
 typedef enum Expr_Kind{
   EK_None,
@@ -11,6 +17,7 @@ typedef enum Expr_Kind{
   EK_List, 
   EK_Call, 
   EK_Index,
+  EK_Sizeof,
 } Expr_Kind;
 
 struct Expr {
@@ -19,7 +26,7 @@ struct Expr {
   Expr  *next;
   union {
     struct {
-      //Typespec *type;
+      Typespec *type;
       Expr* expr;
     } cast;
     struct {
@@ -46,5 +53,12 @@ struct Expr {
       Expr* on_true;
       Expr* on_false;
     } ternary;
+    struct{
+      Expr_Sizeof_Kind kind;
+      union{
+        Typespec *type;
+        Expr *expr;
+      };
+    } size_of;
   };
 };