From 17cd1d0210bb90c2aa300d7f509446a2285f9b93 Mon Sep 17 00:00:00 2001
From: bangbangsheshotmedown <apocalypse.praise@gmail.com>
Date: Sat, 11 Apr 2026 19:21:35 +0200
Subject: [PATCH] Add support for the new alias this declaration syntax

---
 src/dparse/parser.d | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/src/dparse/parser.d b/src/dparse/parser.d
index 1357e20e..668f6041 100644
--- a/src/dparse/parser.d
+++ b/src/dparse/parser.d
@@ -282,8 +282,9 @@ class Parser
      * Parses an AliasThisDeclaration.
      *
      * $(GRAMMAR $(RULEDEF aliasThisDeclaration):
-     *     $(LITERAL 'alias') $(LITERAL Identifier) $(LITERAL 'this') $(LITERAL ';')
-     *     ;)
+     * $(LITERAL 'alias') $(LITERAL Identifier) $(LITERAL 'this') $(LITERAL ';')
+     * | $(LITERAL 'alias') $(LITERAL 'this') $(LITERAL '=') $(LITERAL Identifier) $(LITERAL ';')
+     * ;)
      */
     AliasThisDeclaration parseAliasThisDeclaration()
     {
@@ -291,8 +292,17 @@ class Parser
         auto startIndex = index;
         auto node = allocator.make!AliasThisDeclaration;
         mixin(tokenCheck!"alias");
-        mixin(tokenCheck!(`node.identifier`, "identifier"));
-        mixin(tokenCheck!"this");
+        if (currentIs(tok!"this"))
+        {
+            advance();
+            mixin(tokenCheck!"=");
+            mixin(tokenCheck!(`node.identifier`, "identifier"));
+        }
+        else
+        {
+            mixin(tokenCheck!(`node.identifier`, "identifier"));
+            mixin(tokenCheck!"this");
+        }
         return attachCommentFromSemicolon(node, startIndex);
     }
 
@@ -2315,7 +2325,8 @@ class Parser
             mixin(tokenCheck!"}");
             break;
         case tok!"alias":
-            if (startsWith(tok!"alias", tok!"identifier", tok!"this"))
+            if (startsWith(tok!"alias", tok!"identifier", tok!"this")
+                || startsWith(tok!"alias", tok!"this", tok!"="))
                 mixin(parseNodeQ!(`node.aliasThisDeclaration`, `AliasThisDeclaration`));
             else
                 mixin(parseNodeQ!(`node.aliasDeclaration`, `AliasDeclaration`));