Use C/C++ grammar files from VSCode

[alexl0gan]

What it does

Update textmate-grammars package to use vscode grammar files as defined here:
https://github.com/jeff-hykin/cpp-textmate-grammar
https://github.com/microsoft/vscode/tree/master/extensions/cpp/syntaxes

How to test

Open a C/C++ file and enjoy a richer syntax colourisation.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

Signed-off-by: Alex Logan Alex.Logan@arm.com

[vince-fugnitto]

@alexl0gan the extension @theia/texmate-grammars will be deprecated soon #6933 in favor of using the builtin extensions. Perhaps the grammars would be more appropriate if added to theia-cpp-extensions.

[vince-fugnitto]

Also, you referenced that your changes are based on https://github.com/jeff-hykin/cpp-textmate-grammar, would it not be simpler just to use it as a plugin?

[alexl0gan]

@vince-fugnitto I thought the grammar files were moved out of that repo?

I guess when the move is made to builtin extensions then theia will start using these files anyway

[vince-fugnitto]

I guess when the move is made to builtin extensions then theia will start using these files anyway

We have already moved towards using the builtin extensions in the examples (#6883), and any other extension such as https://github.com/jeff-hykin/cpp-textmate-grammar can now simply be used as a plugin. In the end, there will be less need for maintenance and to copy files in our sources.

[vince-fugnitto]

I believe this pull-request can be closed based on our discussions.