When writing code with Qt/C++, you can't create function definitions in cpp files for methods after private slots:.

[yyyu-void]

Type: Bug

When writing code with Qt/C++, you can't create function definitions in cpp files for methods after private slots:.

class Xxx: public QWidget
{
.........
private slots:
void do();
};
The definition of do method cannot be generated here.

Extension version: 1.27.0
VS Code version: Code 1.103.1 (360a4e4fd251bfce169a4ddf857c7d25d1ad40da, 2025-08-12T16:25:40.542Z)
OS version: Windows_NT x64 10.0.26100
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz (12 x 1608)
GPU Status	2d_canvas: enabled direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.78GB (21.52GB free)
Process Argv	--crash-reporter-id a89367dc-c102-49a8-acea-f1aa20840b8e
Screen Reader	no
VM	40%

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[Colengms]

Hi @aqter. I found some information here: https://stackoverflow.com/questions/9147636/qt-private-slots-what-is-this

It looks like "slots" are not standard C++ and are supported by Qt's Meta-Object Compiler (moc). The C/C++ Extension is not aware of this syntax, which would explain why certain features fail to work properly in source files that use them.

Would you like us to consider this issue a feature request, to support Qt's Meta-Object syntax?

[yyyu-void]

Hi @aqter. I found some information here: https://stackoverflow.com/questions/9147636/qt-private-slots-what-is-this

It looks like "slots" are not standard C++ and are supported by Qt's Meta-Object Compiler (moc). The C/C++ Extension is not aware of this syntax, which would explain why certain features fail to work properly in source files that use them.

Would you like us to consider this issue a feature request, to support Qt's Meta-Object syntax?

I don't think this has anything to do with Qt meta-objects. In fact, the following code can't generate definitions normally, but it can be compiled by a compiler:

#define XXX

class Xxx: public QWidget
{
.........
private XXX:
void do();
};

I think this is a problem with this plug-in.

[Colengms]

Hi @yyyu-void . I'm not able to locally repro an issue with the create-function-definition feature, based on your example (with Qt Meta-Object syntax removed, and not using 'do' as a function name, as that's a reserved C++ keyword).

If you'd like to provide a stand-alone repro that we can investigate further, that doesn't involve use of Qt's Meta-Object syntax, we'd be happy to take a look.

Note that in your example that #defines away XXX, you would need to add #define XXX to a hint file, to prevent the parser from failing to interpret the code around its use correctly. https://learn.microsoft.com/en-us/cpp/build/reference/hint-files?view=msvc-170