refactor: isolate condition to not forward declare specializations

Author: JohelEGP

regression-tests/test-results/pure2-template-specialization.cpp

@@ -20,7 +20,7 @@ template<typename T> requires( std::is_void_v<T> )
   class t<T> {public: cpp2::i32 b {2}; 
 };
 template<typename T> extern cpp2::i32 v;// clang-format off
-template<> extern cpp2::i32 v<void>;// clang-format on
+                          // clang-format on
 auto main() -> int;
 
 

source/cppfront.cpp

@@ -4885,12 +4885,19 @@ class cppfront
 
         if (
             printer.get_phase() == printer.phase0_type_decls
+            && !n.is_namespace()
+            && !n.is_type()
+            )
+        {
+            return;
+        }
+
+        //  Do not forward declare specializations.
+        if (
+            n.is_specialization()
             && (
-                (
-                 !n.is_namespace()
-                 && !n.is_type()
-                 ) ||
-                     n.is_specialization()
+                (n.is_type() && printer.get_phase() == printer.phase0_type_decls)
+                || (n.is_object() && printer.get_phase() == printer.phase1_type_defs_func_decls)
                 )
             )
         {