Move definition of base_type_eqt to .cpp

This is an implementation detail that need not be exposed to users - the
interface is the free function base_type_eq.

Author: tautschnig

src/util/base_type.cpp

@@ -17,6 +17,39 @@ Author: Daniel Kroening, kroening@kroening.com
 #include "std_types.h"
 #include "namespace.h"
 #include "symbol.h"
+#include "union_find.h"
+
+class base_type_eqt
+{
+public:
+  explicit base_type_eqt(const namespacet &_ns):ns(_ns)
+  {
+  }
+
+  bool base_type_eq(const typet &type1, const typet &type2)
+  {
+    identifiers.clear();
+    return base_type_eq_rec(type1, type2);
+  }
+
+  bool base_type_eq(const exprt &expr1, const exprt &expr2)
+  {
+    identifiers.clear();
+    return base_type_eq_rec(expr1, expr2);
+  }
+
+  virtual ~base_type_eqt() { }
+
+protected:
+  const namespacet &ns;
+
+  virtual bool base_type_eq_rec(const typet &type1, const typet &type2);
+  virtual bool base_type_eq_rec(const exprt &expr1, const exprt &expr2);
+
+  // for loop avoidance
+  typedef union_find<irep_idt> identifierst;
+  identifierst identifiers;
+};
 
 void base_type_rec(
   typet &type, const namespacet &ns, std::set<irep_idt> &symb)

src/util/base_type.h

@@ -12,9 +12,6 @@ Author: Daniel Kroening, kroening@kroening.com
 #ifndef CPROVER_UTIL_BASE_TYPE_H
 #define CPROVER_UTIL_BASE_TYPE_H
 
-#include "union_find.h"
-#include "irep.h"
-
 class exprt;
 class typet;
 class namespacet;
@@ -29,36 +26,4 @@ bool base_type_eq(
   const exprt &expr2,
   const namespacet &ns);
 
-class base_type_eqt
-{
-public:
-  explicit base_type_eqt(const namespacet &_ns):ns(_ns)
-  {
-  }
-
-  bool base_type_eq(const typet &type1, const typet &type2)
-  {
-    identifiers.clear();
-    return base_type_eq_rec(type1, type2);
-  }
-
-  bool base_type_eq(const exprt &expr1, const exprt &expr2)
-  {
-    identifiers.clear();
-    return base_type_eq_rec(expr1, expr2);
-  }
-
-  virtual ~base_type_eqt() { }
-
-protected:
-  const namespacet &ns;
-
-  virtual bool base_type_eq_rec(const typet &type1, const typet &type2);
-  virtual bool base_type_eq_rec(const exprt &expr1, const exprt &expr2);
-
-  // for loop avoidance
-  typedef union_find<irep_idt> identifierst;
-  identifierst identifiers;
-};
-
 #endif // CPROVER_UTIL_BASE_TYPE_H