From 6f1fff94dcf1d62f73acafff1a1e216a98cd4709 Mon Sep 17 00:00:00 2001
From: Gregg Miskelly <greggm@microsoft.com>
Date: Mon, 5 Jan 2026 13:54:29 -0800
Subject: [PATCH] STL.natvis: Add `c_str` intrinsic function

This PR adds a `c_str` intrinsic function to std::basic_string so that it is easier to compare the value of an std::string in a conditional breakpoint.
---
 stl/debugger/STL.natvis | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stl/debugger/STL.natvis b/stl/debugger/STL.natvis
index ec8b3cb4180..75260f08a60 100644
--- a/stl/debugger/STL.natvis
+++ b/stl/debugger/STL.natvis
@@ -1011,6 +1011,7 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
     <Intrinsic Name="bufSize" Expression="16 / sizeof($T1) &lt; 1 ? 1 : 16 / sizeof($T1)" />
     <Intrinsic Name="isShortString" Expression="capacity() &lt; bufSize()" />
     <Intrinsic Name="isLongString" Expression="capacity() &gt;= bufSize()" />
+    <Intrinsic Name="c_str" Expression="const_cast&lt;const $T1*&gt;(isShortString() ? _Mypair._Myval2._Bx._Buf : _Mypair._Myval2._Bx._Ptr)" />
     <DisplayString Condition="isShortString()">{_Mypair._Myval2._Bx._Buf,na}</DisplayString>
     <DisplayString Condition="isLongString()">{_Mypair._Myval2._Bx._Ptr,na}</DisplayString>
     <StringView Condition="isShortString()">_Mypair._Myval2._Bx._Buf,na</StringView>