Extension reports error for valid C++23 escape sequence #13338
Description
Environment
- OS and Version: Windows 11 + WSL2 Ubuntu + RHEL-8 docker
- VS Code Version: 1.97.2
- C/C++ Extension Version: 1.24.1
- If using SSH remote, specify OS of remote machine: N/A
Bug Summary and Steps to Reproduce
Bug Summary:
C++ 23 introduced new escape sequences. See details in https://en.cppreference.com/w/cpp/language/escape .
Both GCC and clang support it (didn't tried with MSVC). However the extension "ms-vscode.cpptools" reports an error when present in code.
Steps to reproduce:
#include <array>
#include <iostream>
int main()
{
const std::array<char, 2> x{"\x{3F}"};
std::cout << "Hello \x{40}" << x[0] << std::endl; // At runtime displays "Hello @?"
return 0;
}Above C++ code compiles fine, but these 2 errors are reported:
a value of type "const char [5]" cannot be used to initialize an entity of type "std::__array_traits<char, 2UL>::_Type" (aka "char [2]") C/C++(144)invalid hexadecimal number C/C++(22)
Expected behavior:
No error reported when using C++23 escape sequence.
Configuration and Logs
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [],
"cStandard": "c11",
"cppStandard": "c++23",
"intelliSenseMode": "linux-gcc-x64",
"configurationProvider": "ms-vscode.cmake-tools",
"compileCommands": "${workspaceFolder}/build/compile_commands.json"
}
],
"version": 4
}
-------- Diagnostics - 3/4/2025, 1:59:29 PM
Version: 1.24.1
Current Configuration:
{
"name": "Linux",
"includePath": [
"/home/axis/workspace/map-core/**"
],
"defines": [],
"cStandard": "c11",
"cppStandard": "c++20",
"intelliSenseMode": "linux-gcc-x64",
"configurationProvider": "ms-vscode.cmake-tools",
"compileCommands": [
"/home/axis/workspace/map-core/build/compile_commands.json"
],
"compilerPathIsExplicit": false,
"cStandardIsExplicit": true,
"cppStandardIsExplicit": true,
"intelliSenseModeIsExplicit": true,
"compileCommandsInCppPropertiesJson": [
"${workspaceFolder}/build/compile_commands.json"
],
"configurationProviderInCppPropertiesJson": "ms-vscode.cmake-tools",
"mergeConfigurations": false,
"browse": {
"path": [
"/home/axis/workspace/map-core/**",
"${workspaceFolder}"
],
"limitSymbolsToIncludedHeaders": true
}
}
Modified Settings:
{
"C_Cpp.default.cppStandard": "c++23",
"C_Cpp.codeAnalysis.exclude": {
"**/.git": true,
"**/build": true
},
"C_Cpp.codeAnalysis.clangTidy.enabled": true
}
Additional Tracked Settings:
{
"editorTabSize": 4,
"editorInsertSpaces": true,
"editorAutoClosingBrackets": "languageDefined",
"filesEncoding": "utf8",
"filesAssociations": {
"any": "cpp",
"array": "cpp",
"atomic": "cpp",
"bit": "cpp",
"*.tcc": "cpp",
"bitset": "cpp",
"cctype": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"compare": "cpp",
"concepts": "cpp",
"condition_variable": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdint": "cpp",
"cstdio": "cpp",
"cstdlib": "cpp",
"cstring": "cpp",
"ctime": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"deque": "cpp",
"list": "cpp",
"map": "cpp",
"set": "cpp",
"string": "cpp",
"unordered_map": "cpp",
"unordered_set": "cpp",
"vector": "cpp",
"exception": "cpp",
"algorithm": "cpp",
"functional": "cpp",
"iterator": "cpp",
"memory": "cpp",
"memory_resource": "cpp",
"numeric": "cpp",
"optional": "cpp",
"random": "cpp",
"ratio": "cpp",
"regex": "cpp",
"source_location": "cpp",
"string_view": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"utility": "cpp",
"fstream": "cpp",
"initializer_list": "cpp",
"iomanip": "cpp",
"iosfwd": "cpp",
"iostream": "cpp",
"istream": "cpp",
"limits": "cpp",
"mutex": "cpp",
"new": "cpp",
"numbers": "cpp",
"ostream": "cpp",
"ranges": "cpp",
"semaphore": "cpp",
"span": "cpp",
"sstream": "cpp",
"stdexcept": "cpp",
"stop_token": "cpp",
"streambuf": "cpp",
"thread": "cpp",
"cinttypes": "cpp",
"typeinfo": "cpp",
"variant": "cpp",
"*.k5": "cpp",
"*.inc": "cpp",
"*.def": "cpp",
"chrono": "cpp",
"*.k4": "cpp",
"*.k5-64": "cpp",
"cassert": "cpp",
"cerrno": "cpp",
"cfloat": "cpp",
"climits": "cpp",
"ios": "cpp",
"locale": "cpp",
"queue": "cpp",
"stack": "cpp",
"*.k4-64": "cpp",
"charconv": "cpp",
"codecvt": "cpp",
"forward_list": "cpp",
"format": "cpp"
},
"filesExclude": {
"**/.git": true,
"**/.svn": true,
"**/.hg": true,
"**/CVS": true,
"**/.DS_Store": true,
"**/Thumbs.db": true,
"**/.trunk/*actions/": true,
"**/.trunk/*logs/": true,
"**/.trunk/*notifications/": true,
"**/.trunk/*out/": true,
"**/.trunk/*plugins/": true
},
"filesAutoSaveAfterDelay": false,
"editorInlayHintsEnabled": true,
"editorParameterHintsEnabled": true,
"searchExclude": {
"**/node_modules": true,
"**/bower_components": true,
"**/*.code-search": true
},
"workbenchSettingsEditor": "ui"
}
Custom browse configuration:
{
"browsePath": [
"/home/axis/workspace/map-core/build/CMakeFiles",
"...snip..."
],
"compilerPath": "/opt/rh/gcc-toolset-13/root/usr/bin/g++",
"compilerArgs": [],
"compilerFragments": [
" -DUNIX -DLINUX -DGEN_GNU -D__STDC_CONSTANT_MACROS -DDEBUG -g -Og -Wall -W -Wwrite-strings -Wno-error -pipe -std=gnu++23 -include /home/axis/workspace/map-core/libs/common/include/common/map_clang_analyzer.hpp",
"-Wall",
"-Wextra",
"-pedantic",
"-Werror",
"-Wnon-virtual-dtor",
"-Wformat=2",
"-O0",
"-fno-inline-small-functions",
"-fno-omit-frame-pointer",
"-ggdb3",
"-fsanitize=address",
"-fsanitize=undefined",
"-fno-sanitize=vptr"
]
}
cpptools version (native): 1.24.1.0
Current database path: /home/axis/.cache/vscode-cpptools/da81b6228513e761d502224d12d89059/.browse.VC.db
Translation Unit Mappings:
[ /home/axis/workspace/map-core/testu/tpvtestu/src/tpv_init_testu.cpp - source TU]:
Translation Unit Configurations:
[ /home/axis/workspace/map-core/testu/tpvtestu/src/tpv_init_testu.cpp ]
Process ID: 8544
Memory Usage: 713 MB
Compiler Path: /opt/rh/gcc-toolset-13/root/usr/bin/g++
Includes:
...snip...
System Includes:
/opt/rh/gcc-toolset-13/root/usr/include/c++/13
/opt/rh/gcc-toolset-13/root/usr/include/c++/13/x86_64-redhat-linux
/opt/rh/gcc-toolset-13/root/usr/include/c++/13/backward
/opt/rh/gcc-toolset-13/root/usr/lib/gcc/x86_64-redhat-linux/13/include
/usr/local/include
/opt/rh/gcc-toolset-13/root/usr/include
/usr/include
Defines:
AXIS_ENABLE_CPP11
AXIS_ENABLE_CPP14
AXIS_ENABLE_CPP17
AXIS_ENABLE_CPP20
AXIS_ENABLE_CPP23
MAP_OUTPUT_FOLDER="/tmp"
PROTOBUF_USE_DLLS
RAPIDJSON_HAS_STDSTRING=1
RHEL_VERSION_NUMBER=8
UNIX
LINUX
GEN_GNU
__STDC_CONSTANT_MACROS
DEBUG
Forced Includes:
/home/axis/workspace/map-core/libs/common/include/common/map_clang_analyzer.hpp
Standard Version: c++23
IntelliSense Mode: linux-gcc-x64
Other Flags:
--g++
--gnu_version=130301
Total Memory Usage: 713 MB
Browse Paths from compile_commands.json, from workspace folder: /home/axis/workspace/map-core
...snip...
------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 14594
Number of files parsed: 2Other Extensions
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