Reject 0-sized variables

1 files changed, 9 insertions, 0 deletions

diff --git a/boot/symbol.cc b/boot/symbol.cc
index fdf6a65..b32782e 100644
--- a/boot/symbol.cc
+++ b/boot/symbol.cc
@@ -55,6 +55,7 @@ namespace elna::boot
     template std::shared_ptr<constant_type> type::get<constant_type>() const;
     template std::shared_ptr<procedure_type> type::get<procedure_type>() const;
     template std::shared_ptr<enumeration_type> type::get<enumeration_type>() const;
+    template std::shared_ptr<extern_type> type::get<extern_type>() const;
 
     bool type::operator==(const std::nullptr_t&) const
     {
@@ -80,6 +81,10 @@ namespace elna::boot
         {
             return left_enumeration == resolved_that.get<enumeration_type>();
         }
+        if (auto left_extern = resolved_this.get<extern_type>())
+        {
+            return left_extern == resolved_that.get<extern_type>();
+        }
         if (auto left_pointer = resolved_this.get<pointer_type>())
         {
             auto right_pointer = resolved_that.get<pointer_type>();
@@ -181,6 +186,10 @@ namespace elna::boot
             {
                 return "(enumeration)";
             }
+            else if constexpr (std::is_same_v<T, std::shared_ptr<extern_type>>)
+            {
+                return "extern";
+            }
         }, payload);
     }