From 7ac955a389b0364faa5abda558ec229beb515a2f Mon Sep 17 00:00:00 2001
From: Pavel Shevaev <pacha.shevaev@gmail.com>
Date: Thu, 9 Nov 2023 17:47:36 +0300
Subject: [PATCH] Adding @enum_replace support

---
 metagen.inc.php |  6 ++++++
 parser.inc.php  | 15 ++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/metagen.inc.php b/metagen.inc.php
index 0d7fd47..1ebb08e 100644
--- a/metagen.inc.php
+++ b/metagen.inc.php
@@ -853,6 +853,12 @@ class mtgMetaEnum extends mtgUserType
     $this->tokens = array_merge($this->tokens, $other->getTokens());
     $this->values = array_merge($this->values, $other->getValues());
   }
+
+  function replace(mtgMetaEnum $other)
+  {
+    $this->tokens = $other->getTokens();
+    $this->values = $other->getValues();
+  }
 } 
 
 function mtg_get_all_fields(mtgMetaStruct $struct)
diff --git a/parser.inc.php b/parser.inc.php
index 806c9f2..0f0a25b 100644
--- a/parser.inc.php
+++ b/parser.inc.php
@@ -94,6 +94,7 @@ class mtgMetaInfoParser
     $config['valid_tokens'][] = 'class_id';
     $config['valid_tokens'][] = 'shared_tokens';
     $config['valid_tokens'][] = 'enum_override';
+    $config['valid_tokens'][] = 'enum_replace';
   }
 
   function parse(mtgMetaInfo $meta, $raw_file)
@@ -374,12 +375,24 @@ class mtgMetaInfoParser
     {
       $existing = $this->current_meta->findUnit($enum->getMetaId());
       if(!$existing)
-        throw new Exception("Not found '{$name}' enum to override");
+        throw new Exception("Not found '{$name}' enum to override values");
       if(!($existing->object instanceof mtgMetaEnum))
         throw new Exception("Not an enum struct '{$name}'");
 
       $existing->object->override($enum);
     }
+    //NOTE: special case for enums when we allow to 'replace' the original one, 
+    //      with additional values 
+    else if($enum->hasToken('enum_replace'))
+    {
+      $existing = $this->current_meta->findUnit($enum->getMetaId());
+      if(!$existing)
+        throw new Exception("Not found '{$name}' enum to replace values");
+      if(!($existing->object instanceof mtgMetaEnum))
+        throw new Exception("Not an enum struct '{$name}'");
+
+      $existing->object->replace($enum);
+    }
     else
       $this->_addUnit(new mtgMetaInfoUnit($this->file, $enum));
   }