launch.json configuration's autocomplete (snippet) not displaying extension configurations

[WardenGnaw]

Issue Type: Bug

1. Install Microsoft C/C++ extension
2. Create a simple cpp file (e.g. main.cpp)

   int main(void)
   {
   return 0;
   }

3. Create a launch.json file

   {
   // Use IntelliSense to learn about possible attributes.
   // Hover to view descriptions of existing attributes.
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
   ]
   }

4. Try to insert a snippet into the configurations array and the dropdown list does not list the C++ extension configurations.

Note: The configurations will be shown if you use the "Add Configuration..." button on the lower right hand corner.

VS Code version: Code 1.38.0 (3db7e09f3b61f915d03bbfa58e258d6eee843f35, 2019-09-03T21:49:13.459Z) OS version: Windows_NT x64 10.0.18362

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (8 x 3408)| |GPU Status|2d_canvas: enabled
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
native_gpu_memory_buffers: disabled_software
oop_rasterization: disabled_off
protected_video_decode: unavailable_off
rasterization: enabled
skia_deferred_display_list: disabled_off
skia_renderer: disabled_off
surface_synchronization: enabled_on
video_decode: enabled
viz_display_compositor: disabled_off
webgl: enabled
webgl2: enabled| |Load (avg)|undefined| |Memory (System)|31.92GB (4.40GB free)| |Process Argv|| |Screen Reader|no| |VM|0%|

Extensions (23)

Extension|Author (truncated)|Version ---|---|--- rest-client|hum|0.21.3 azure-pipelines|ms-|1.152.0 vscode-apimanagement|ms-|0.1.1 vscode-azureappservice|ms-|0.15.0 vscode-azurefunctions|ms-|0.17.1 vscode-azurestorage|ms-|0.7.0 vscode-cosmosdb|ms-|0.10.2 mssql|ms-|1.6.0 remote-containers|ms-|0.59.0 remote-ssh|ms-|0.42.2 remote-ssh-edit|ms-|0.42.2 remote-ssh-explorer|ms-|0.42.2 remote-wsl|ms-|0.38.0 vscode-remote-extensionpack|ms-|0.15.0 azure-account|ms-|0.8.4 azurecli|ms-|0.4.6 cpptools|ms-|0.25.1 csharp|ms-|1.20.0 mono-debug|ms-|0.15.8 vscode-node-azure-pack|ms-|0.0.9 azurerm-vscode-tools|msa|0.6.0 code-spell-checker|str|1.7.17 azure-iot-toolkit|vsc|2.9.0

[vscodebot[bot]]

(Experimental duplicate detection) Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• "Add Configuration..." only works if launch.json has configurations (#68128)
• Python configuration template missing when configuration already exist (#80514)

[isidorn]

I can not reproduce this with latest vsocde insiders https://code.visualstudio.com/insiders/

@WardenGnaw what are you doing differently than me in this screenshot (note that I triggered inteli-sense via cmd + space)? Can you reproduce with an empty user-data-dir and no other extensions on vscode insiders?

fyi @jrieken in case we changed something in snippets

[WardenGnaw]

@isidorn Thanks for investigating this issue!

what are you doing differently than me in this screenshot (note that I triggered inteli-sense via cmd + space)?

Sorry I didn't clarify that step, I was triggering inteli-sense with typing in double quotes. See GIF below.

ctrl (or cmd on macOS) + space works as expected. It is exactly the same as if you would click on the Add Configuration... button.

VS Code 1.39.0-insider

``` Version: 1.39.0-insider (system setup) Commit: 211fa02efe8c041fd7baa8ec3dce199d5185aa44 Date: 2019-09-11T06:18:37.576Z Electron: 4.2.10 Chrome: 69.0.3497.128 Node.js: 10.11.0 V8: 6.9.427.31-electron.0 OS: Windows_NT x64 10.0.18362 ```

I double checked to see if this was a platform specific issue, but this also occurs on macOS.

[isidorn]

@WardenGnaw thanks for providing more details. However this is not a regression, we were always behaving like this. It is weird that all other snippets get shown (nodejs, chrome) and the C++ snippets do not get shown. After some debugging I believe that you are dynamically providing your C++ snippets and the rest of the snippets are provided via static package.json contribution. As to why the dynamic snippets are treated differently from the static snippets in JSON. @aeschli might be better to answer. Joh had the idea that JSON treats " as a word which might be a problem.

I deleted some off topic comments from above to make the convesation cleaner.

[WardenGnaw]

@isidorn I'm not sure if this is the same issue but the configurations are also missing in *.code-workspace. Both ctrl (or cmd) + space do not display the C++ configurations in the configuration section.

I added a DocumentSelector for .code-workspace and registered it as a completionItemProvider but it also does not show snippets.

Since there is no Add Configuration for .code-workspace there is no way to provide launch configurations there.

Related: https://github.com/microsoft/vscode-cpptools/issues/4891

[isidorn]

Yes, I believe this is the same issue.