C/C++ extension flags error with std::bind, but code compiles without error

[jimorc]

Environment

• Windows 11 insider build 25267
• VS Code Version: 1.74.2
• C/C++ Extension Version: 1.13.8
• running in VMWare Fusion 13 on M1 MacOS 13.1

Bug Summary and Steps to Reproduce

Bug Summary:
std::function<...> f = std::bind(...) is flagged by Cpptools with error:
no suitable user-defined conversion from "std::_Binder<std::_Unforced, int (A::*)(int x), A *, const std::_Ph<1> &>" to "std::function<int (int)>" existsC/C++(312)

but it compiles with MSVC from latest Visual Studio Community edition tools, and executes properly.
Disabling Cpptools removed the error.

Here is a program that illustrated the problem:

#include <functional>
#include <iostream>
using namespace std::placeholders;

class A
{
    public:
        int add2(int x) { return x + 2; }
};
int main()
{
    A a;
    std::function<int(int)> f = std::bind(&A::add2, &a, _1);
    std::cout << f(3) << '\n';
}

1. Build the program using VS Code with Cpptools enabled. No build errors are reported.
2. In VS Code, open the source file. The std::bind call is flagged with the error.
3. Disable Cpptools. Click on Reload Required button. The std::bind call is no longer flagged.

Expected behavior:
The std::bind call should not be flagged by Cpptools.

Configuration and Logs

No c_cpp_properties.json file.

Log Diagnostics:
{
  "os": "win32",
  "vscodeVersion": "1.74.2",
  "cmtVersion": "1.12.27",
  "configurations": [
    {
      "folder": "c:\\Users\\Jim\\source",
      "cmakeVersion": "3.24.202208181",
      "configured": true,
      "generator": "Visual Studio 17 2022",
      "usesPresets": false,
      "compilers": {}
    }
  ],
  "cpptoolsIntegration": {
    "isReady": false,
    "hasCodeModel": false,
    "activeBuildType": "",
    "buildTypesSeen": [],
    "requests": [],
    "responses": [],
    "partialMatches": [],
    "targetCount": 0,
    "executablesCount": 0,
    "librariesCount": 0,
    "targets": []
  },
  "settings": [
    {
      "communicationMode": "automatic",
      "useCMakePresets": "auto",
      "configureOnOpen": true
    }
  ]
}

C++ logging:
loggingLevel: Debug
Custom browse configuration received: {
  "browsePath": [
    "c:/users/jim/source/build/cmakefiles/63a8a52bcd7fa1e0db6e090a8dad8b4a",
    "c:/users/jim/source"
  ],
  "compilerPath": "c:/program files/microsoft visual studio/2022/community/vc/tools/msvc/14.34.31933/bin/hostx64/arm64/cl.exe",
  "compilerFragments": [
    "/DWIN32 /D_WINDOWS /EHsc /Zi /Ob0 /Od /RTC1 -MDd"
  ],
  "compilerArgsLegacy": []
}
cpptools/didChangeCppProperties
Code browsing service initialized
Attempting to get defaults from C++ compiler in "compilerPath" property: 'C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.34.31933/bin/Hostx64/x64/cl.exe'
Attempting to get defaults from C compiler in "compilerPath" property: 'C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.34.31933/bin/Hostx64/x64/cl.exe'
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/CPPWINRT/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/SHARED/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UCRT/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UM/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/WINRT/ will be indexed
  Folder: C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/ATLMFC/INCLUDE/* will be indexed
  Folder: C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/INCLUDE/* will be indexed
  Folder: C:/USERS/JIM/SOURCE/ will be indexed
cpptools/didChangeCustomBrowseConfiguration
Discovering files...
Attempting to get defaults from C++ compiler in "compilerPath" property: 'c:/program files/microsoft visual studio/2022/community/vc/tools/msvc/14.34.31933/bin/hostx64/arm64/cl.exe'
  Folder: C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/INCLUDE/* will be indexed
  Folder: C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/ATLMFC/INCLUDE/* will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UM/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UCRT/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/SHARED/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/WINRT/ will be indexed
  Folder: C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/CPPWINRT/ will be indexed
  Folder: C:/USERS/JIM/SOURCE/ will be indexed
cpptools/clearCustomConfigurations
  Discovering files: 0 file(s) processed
Done discovering files.
Discovering files...
  Processing folder (non-recursive): C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/INCLUDE
  Processing folder (non-recursive): C:/PROGRAM FILES/MICROSOFT VISUAL STUDIO/2022/COMMUNITY/VC/TOOLS/MSVC/14.34.31933/ATLMFC/INCLUDE
  Processing folder (recursive): C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UM/
  Processing folder (recursive): C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/UCRT/
  Processing folder (recursive): C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/SHARED/
  Processing folder (recursive): C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/WINRT/
  Processing folder (recursive): C:/PROGRAM FILES (X86)/WINDOWS KITS/10/INCLUDE/10.0.22621.0/CPPWINRT/
  Processing folder (recursive): C:/USERS/JIM/SOURCE/
  Discovering files: 6331 file(s) processed
  0 file(s) removed from database
Done discovering files.
Populating include completion cache.
Parsing remaining files...
  tag parsing file: C:\Users\Jim\source\bind.cpp
  Parsing: 143 files(s) processed
Done parsing remaining files.
cpptools/getSemanticTokens: C:\Users\Jim\source\bind.cpp (id: 2)

Other Extensions

All other extensions disabled. Bug still there.

Additional context

No response

[sean-mcmanus]

You appear to have provided the CMake Tools Log Diagnostics instead of the C/C++ extension Log Diagnostics -- can you provide our logs? In particular, I'm not reproing the bug (yet), so I was looking for a configuration setting that might be required.

[sean-mcmanus]

Also, your C/C++ logging doesn't show any file being opened (so no IntelliSense for the file).

[jimorc]

cpptools/queryTranslationUnitSource: C:\Users\Jim\source\bind.cpp (id: 144)
Custom configurations received:
uri: file:///c%3A/Users/Jim/source/bind.cpp
config: {
"includePath": [],
"defines": [],
"compilerPath": "c:/program files/microsoft visual studio/2022/community/vc/tools/msvc/14.34.31933/bin/hostx64/arm64/cl.exe",
"compilerArgs": [],
"compilerFragments": [
"/DWIN32 /D_WINDOWS /EHsc /Zi /Ob0 /Od /RTC1 -MDd",
"-std:c++17"
]
}
cpptools/didChangeCustomConfiguration
Attempting to get defaults from C++ compiler in "compilerPath" property: 'c:/program files/microsoft visual studio/2022/community/vc/tools/msvc/14.34.31933/bin/hostx64/arm64/cl.exe'
textDocument/didOpen: C:\Users\Jim\source\bind.cpp
cpptools/textEditorSelectionChange
cpptools/getCodeActions: C:\Users\Jim\source\bind.cpp (id: 145)
cpptools/getDocumentSymbols: C:\Users\Jim\source\bind.cpp (id: 146)
cpptools/textEditorSelectionChange
cpptools/getDocumentSymbols
cpptools/activeDocumentChange: C:\Users\Jim\source\bind.cpp
cpptools/getSemanticTokens: C:\Users\Jim\source\bind.cpp (id: 147)
cpptools/getInlayHints: C:\Users\Jim\source\bind.cpp (id: 148)
Database safe to open
sending compilation args for C:\Users\Jim\source\bind.cpp
include: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\COMMUNITY\VC\TOOLS\MSVC\14.34.31933\INCLUDE
include: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\COMMUNITY\VC\TOOLS\MSVC\14.34.31933\ATLMFC\INCLUDE
include: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UM
include: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UCRT
include: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\SHARED
include: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\WINRT
include: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\CPPWINRT
define: _DEBUG
define: _MT
define: _DLL
define: WIN32
define: _WINDOWS
stdver: ms_c++17
intelliSenseMode: windows-msvc-arm64
Checking for syntax errors: C:\Users\Jim\source\bind.cpp
Queueing IntelliSense update for files in translation unit of: C:\Users\Jim\source\bind.cpp
cpptools/getFoldingRanges: C:\Users\Jim\source\bind.cpp (id: 149)
cpptools/getCodeActions: C:\Users\Jim\source\bind.cpp (id: 150)
cpptools/finishUpdateSquiggles
Error squiggle count: 1
Update IntelliSense time (sec): 0.892
cpptools/getFoldingRanges: C:\Users\Jim\source\bind.cpp (id: 151)
cpptools/getCodeActions: C:\Users\Jim\source\bind.cpp (id: 152)

[jimorc]

The problem exists for C++17 and earlier. No problem with C++20.

[sean-mcmanus]

Okay, I repro it now -- it only repros with the windows-msvc-arm64 intelliSenseMode and not the windows-msvc-x64 mode.

[sean-mcmanus]

This is already fixed in our pending 1.14.0 update (we may release it in a week or two, not sure).

[sean-mcmanus]

The fix is available with 1.14.0 (pre-release): https://github.com/microsoft/vscode-cpptools/releases/tag/v1.14.0