Add Types.h to %code require in parser definition.

Monicelli.ll

@@ -1,5 +1,4 @@
 %{
-#include "Type.h"
 #include "Monicelli.tab.h"
 #include <stdlib.h>
 #include <stdio.h>

Monicelli.y

@@ -1,14 +1,15 @@
 %{
-#include "Type.h"
-
 #define YYERROR_VERBOSE
 
 extern void emit(const char *, ...);
 extern void yyerror(const char *);
 extern int yylex();
-
 %}
 
+%code requires {
+    #include "Type.h"
+}
+
 %union {
     Type typeval;
     int intval;

main.c

@@ -1,4 +1,3 @@
-#include "Type.h"
 #include "Monicelli.tab.h"
 
 #include <stdio.h>