https://github.com/evelez7 created 
https://github.com/llvm/llvm-project/pull/140856

Fixes #59812

The names of conversion functions of template type parameters were being 
emitted as "type-parameter-N-M". Now we check if the conversion type is a 
TemplateTypeParmType and reconstruct the source name.

>From e25581d28ecda89fe4e550da71e668b6ae749804 Mon Sep 17 00:00:00 2001
From: Erick Velez <erickvel...@gmail.com>
Date: Tue, 20 May 2025 23:26:02 -0700
Subject: [PATCH] [clang-doc] fix conversion names of dependent types

Fixes #59812

The names of conversion functions of template type parameters were
being emitted as "type-parameter-N-M". Now we check if the conversion
type is a TemplateTypeParmType and reconstruct the source name.
---
 clang-tools-extra/clang-doc/Serialize.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/clang-tools-extra/clang-doc/Serialize.cpp 
b/clang-tools-extra/clang-doc/Serialize.cpp
index 18db427b5239e..585a46112d43d 100644
--- a/clang-tools-extra/clang-doc/Serialize.cpp
+++ b/clang-tools-extra/clang-doc/Serialize.cpp
@@ -525,7 +525,13 @@ template <typename T>
 static void populateInfo(Info &I, const T *D, const FullComment *C,
                          bool &IsInAnonymousNamespace) {
   I.USR = getUSRForDecl(D);
-  I.Name = D->getNameAsString();
+  auto ConversionDecl = dyn_cast_or_null<CXXConversionDecl>(D);
+  if (ConversionDecl && ConversionDecl->getConversionType()
+                            .getTypePtr()
+                            ->isTemplateTypeParmType())
+    I.Name = "operator " + ConversionDecl->getConversionType().getAsString();
+  else
+    I.Name = D->getNameAsString();
   populateParentNamespaces(I.Namespace, D, IsInAnonymousNamespace);
   if (C) {
     I.Description.emplace_back();

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