From 768537d6e4b82a19e77b7e44234309ecaf4d65d2 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Sun, 12 Jul 2026 13:23:54 +0200
Subject: Remove unions

---
 include/elna/boot/ast.h      | 16 ----------------
 include/elna/boot/semantic.h |  1 -
 include/elna/boot/symbol.h   |  9 ---------
 3 files changed, 26 deletions(-)

(limited to 'include')

diff --git a/include/elna/boot/ast.h b/include/elna/boot/ast.h
index 17a0dc1..d9f3af8 100644
--- a/include/elna/boot/ast.h
+++ b/include/elna/boot/ast.h
@@ -74,7 +74,6 @@ namespace elna::boot
     class array_type_expression;
     class pointer_type_expression;
     class record_type_expression;
-    class union_type_expression;
     class procedure_type_expression;
     class enumeration_type_expression;
     class named_expression;
@@ -114,7 +113,6 @@ namespace elna::boot
         virtual void visit(array_type_expression *) = 0;
         virtual void visit(pointer_type_expression *) = 0;
         virtual void visit(record_type_expression *) = 0;
-        virtual void visit(union_type_expression *) = 0;
         virtual void visit(procedure_type_expression *) = 0;
         virtual void visit(enumeration_type_expression *) = 0;
         virtual void visit(named_expression *) = 0;
@@ -140,7 +138,6 @@ namespace elna::boot
         [[noreturn]] virtual void visit(pointer_type_expression *) override;
         [[noreturn]] virtual void visit(type_declaration *) override;
         [[noreturn]] virtual void visit(record_type_expression *) override;
-        [[noreturn]] virtual void visit(union_type_expression *) override;
         [[noreturn]] virtual void visit(procedure_type_expression *) override;
         [[noreturn]] virtual void visit(enumeration_type_expression *) override;
 
@@ -184,7 +181,6 @@ namespace elna::boot
         virtual void visit(pointer_type_expression *) override;
         virtual void visit(type_declaration *) override;
         virtual void visit(record_type_expression *) override;
-        virtual void visit(union_type_expression *) override;
         virtual void visit(procedure_type_expression *) override;
         virtual void visit(enumeration_type_expression *) override;
 
@@ -281,7 +277,6 @@ namespace elna::boot
         virtual array_type_expression *is_array();
         virtual pointer_type_expression *is_pointer();
         virtual record_type_expression *is_record();
-        virtual union_type_expression *is_union();
         virtual procedure_type_expression *is_procedure();
         virtual enumeration_type_expression *is_enumeration();
     };
@@ -334,17 +329,6 @@ namespace elna::boot
         record_type_expression *is_record() override;
     };
 
-    class union_type_expression : public type_expression
-    {
-    public:
-        std::vector<field_declaration> fields;
-
-        union_type_expression(const struct position position, std::vector<field_declaration>&& fields);
-
-        void accept(parser_visitor *visitor) override;
-        union_type_expression *is_union() override;
-    };
-
     /**
      * Enumeration type.
      */
diff --git a/include/elna/boot/semantic.h b/include/elna/boot/semantic.h
index e351258..c686cf8 100644
--- a/include/elna/boot/semantic.h
+++ b/include/elna/boot/semantic.h
@@ -197,7 +197,6 @@ namespace elna::boot
         void visit(pointer_type_expression *expression) override;
         void visit(type_declaration *declaration) override;
         void visit(record_type_expression *expression) override;
-        void visit(union_type_expression *expression) override;
         void visit(procedure_type_expression *expression) override;
         void visit(enumeration_type_expression *expression) override;
 
diff --git a/include/elna/boot/symbol.h b/include/elna/boot/symbol.h
index 85532db..d29587d 100644
--- a/include/elna/boot/symbol.h
+++ b/include/elna/boot/symbol.h
@@ -31,7 +31,6 @@ namespace elna::boot
     class alias_type;
     class primitive_type;
     class record_type;
-    class union_type;
     class pointer_type;
     class array_type;
     class procedure_type;
@@ -45,7 +44,6 @@ namespace elna::boot
             alias,
             primitive,
             record,
-            _union,
             pointer,
             array,
             procedure,
@@ -57,7 +55,6 @@ namespace elna::boot
             std::weak_ptr<alias_type> alias;
             std::shared_ptr<primitive_type> primitive;
             std::shared_ptr<record_type> record;
-            std::shared_ptr<union_type> _union;
             std::shared_ptr<pointer_type> pointer;
             std::shared_ptr<array_type> array;
             std::shared_ptr<procedure_type> procedure;
@@ -72,7 +69,6 @@ namespace elna::boot
         explicit type(std::shared_ptr<alias_type> alias);
         explicit type(std::shared_ptr<primitive_type> primitive);
         explicit type(std::shared_ptr<record_type> record);
-        explicit type(std::shared_ptr<union_type> _union);
         explicit type(std::shared_ptr<pointer_type> pointer);
         explicit type(std::shared_ptr<array_type> array);
         explicit type(std::shared_ptr<procedure_type> procedure);
@@ -135,11 +131,6 @@ namespace elna::boot
         explicit record_type(type base = type());
     };
 
-    struct union_type
-    {
-        std::vector<type_field> fields;
-    };
-
     struct procedure_type
     {
         using return_t = return_declaration<type>;
-- 
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