From d0a666507a6f11b65170c257fd483613f462f3f2 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Wed, 15 Jul 2026 23:19:58 +0200
Subject: Use build3(COND_EXPR) for conditionals

---
 boot/semantic.cc | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'boot')

diff --git a/boot/semantic.cc b/boot/semantic.cc
index 031adfc..9137053 100644
--- a/boot/semantic.cc
+++ b/boot/semantic.cc
@@ -206,6 +206,18 @@ namespace elna::boot
         }
     }
 
+    unsupported_trait_type_error::unsupported_trait_type_error(const identifier& trait,
+            type actual)
+        : error(trait.position()), trait_name(trait.name()), actual(actual)
+    {
+    }
+
+    std::string unsupported_trait_type_error::what() const
+    {
+        return "Type '" + actual.to_string()
+            + "' does not support trait '#" + trait_name + "'";
+    }
+
     type_analysis_visitor::type_analysis_visitor(symbol_bag bag)
         : error_container(), bag(bag)
     {
@@ -917,6 +929,25 @@ namespace elna::boot
         else if (trait->name == "min" || trait->name == "max")
         {
             trait->type_decoration = trait->types.empty() ? type() : trait->types.front();
+
+            if (!trait->type_decoration.empty())
+            {
+                type resolved = inner_aliased_type(trait->type_decoration);
+                bool is_enum = resolved.get<enumeration_type>() != nullptr;
+                bool is_integral = false;
+
+                if (auto prim = resolved.get<primitive_type>())
+                {
+                    is_integral = prim->identifier == "Int" || prim->identifier == "Word"
+                        || prim->identifier == "Bool" || prim->identifier == "Char";
+                }
+                if (!is_enum && !is_integral)
+                {
+                    add_error<unsupported_trait_type_error>(trait->name,
+                            trait->type_decoration);
+                    trait->type_decoration = type();
+                }
+            }
         }
         else
         {
-- 
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