On hover declaration popup doesn't use semantic and TextMate token color customization

[noam-no]

Environment

• OS and Version: Win11 24H2; build 26100.4061
• VS Code Version: 1.100.3
• C/C++ Extension Version: 1.25.3

Bug Summary and Steps to Reproduce

Bug Summary:
The on hover popup doesn't respect the given semantic and TextMate token color customization in settings.json. Since it's the language pack that seems to provide this while probably relying on a core part of VS Code, I don't know which is the culprit. Here are some screenshots:

Using TextMate



Using semantic

Steps to reproduce:

1. Set Editor › Semantic Highlighting: Enabled to "true" to not be dependent from a theme.
2. Edit your settings.json to add color customization (an exemple):

        "textMateRules": [
            {
                "scope": "storage.type.built-in.primitive.c",
                "settings": {
                    "foreground": "#de2a2a"
                }
            }
        ]
    },

3. See that on hover that it's ignored.
   Expected behavior:
   Respect the given color.

Configuration and Logs

c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Win32",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [
                "_DEBUG",
                "UNICODE",
                "_UNICODE"
            ],
            "windowsSdkVersion": "10.0.22000.0",
            "compilerPath": "cl.exe",
            "cStandard": "c17",
            "cppStandard": "c++17",
            "intelliSenseMode": "windows-msvc-x64"
        }
    ],
    "version": 4
}

Log Diagnostics:

-------- Diagnostics - 6/11/2025, 10:30:27 PM
Version: 1.25.3
Current Configuration:
{
    "name": "Win32",
    "includePath": [
        "c:/Users/noam-no/Documents/Code/Sandbox/C/**"
    ],
    "defines": [
        "_DEBUG",
        "UNICODE",
        "_UNICODE"
    ],
    "windowsSdkVersion": "10.0.22000.0",
    "compilerPath": "cl.exe",
    "cStandard": "c17",
    "cppStandard": "c++17",
    "intelliSenseMode": "windows-msvc-x64",
    "compilerPathIsExplicit": true,
    "cStandardIsExplicit": true,
    "cppStandardIsExplicit": true,
    "intelliSenseModeIsExplicit": true,
    "recursiveIncludesReduceIsExplicit": false,
    "recursiveIncludesPriorityIsExplicit": false,
    "recursiveIncludesOrderIsExplicit": false,
    "compilerPathInCppPropertiesJson": "cl.exe",
    "mergeConfigurations": false,
    "recursiveIncludes": {},
    "browse": {
        "limitSymbolsToIncludedHeaders": true
    }
}
Additional Tracked Settings:
{
    "editorTabSize": 4,
    "editorInsertSpaces": true,
    "editorAutoClosingBrackets": "languageDefined",
    "filesEncoding": "utf8",
    "filesAssociations": {},
    "filesExclude": {
        "**/.git": true,
        "**/.svn": true,
        "**/.hg": true,
        "**/.DS_Store": true,
        "**/Thumbs.db": true
    },
    "filesAutoSaveAfterDelay": false,
    "editorInlayHintsEnabled": true,
    "editorParameterHintsEnabled": true,
    "searchExclude": {
        "**/node_modules": true,
        "**/bower_components": true,
        "**/*.code-search": true
    },
    "workbenchSettingsEditor": "ui"
}
cpptools version (native): 1.25.3.0
Current database path: C:\USERS\NOAM-NO\APPDATA\LOCAL\MICROSOFT\VSCODE-CPPTOOLS\FC7AC1EF32FF91DF2F2C25CC60BFAC3D\.BROWSE.VC.DB
No active translation units.

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 4950

Language Server Log:

loggingLevel: 6
loggingLevel has changed to: Debug
LSP: (invoked) cpptools/didChangeCppProperties (id: 6)
Attempting to get defaults from C compiler in "compilerPath" property: 'cl.exe'
Attempting to get defaults from C++ compiler in "compilerPath" property: 'cl.exe'
  Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22000.0\CPPWINRT will be indexed
  Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22000.0\SHARED will be indexed
  Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22000.0\UCRT will be indexed
  Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22000.0\UM will be indexed
  Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22000.0\WINRT will be indexed
  Folder: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\COMMUNITY\VC\TOOLS\MSVC\14.42.34433\INCLUDE will be indexed
  Folder: C:\USERS\NOAM-NO\DOCUMENTS\CODE\SANDBOX\C will be indexed
LSP: Sending response (id: 6)
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors

Other Extensions

It's the only extension active.

Additional context

No response

[sean-mcmanus]

@noam-no The VS Code hover API doesn't provide any way to for our extension to set the semantic colorization for the results, and the semantic token API just applies to a document, and there is no API to associate hover text with a particular document/range. i.e. this would be a VS Code issue: https://github.com/microsoft/vscode/issues