case keyword without space followed by character literal breaks syntax highlighting

[MrExquisite]

Bug type: Language Service

Describe the bug

• OS and Version: Windows_NT x64 10.0.19043
• VS Code Version: 1.56.2
• C/C++ Extension Version: 1.4.0
• A clear and concise description of what the bug is, including information about the workspace (i.e. is the workspace a single project or multiple projects, size of the project, etc).

When a keyword like case is immediately followed by a character literal, syntax highlighting gets broken.

Steps to reproduce

1. Open a new file
2. Click on Select Language Mode
3. Select C++
4. Insert the code sample provided below.
5. Observe syntax highlighting

Expected behavior

Syntax highlighting should work correctly, like when a space is positioned between case and the string literal.

Code sample and logs

• Code sample

  switch(i)
  {
  case'g':break;
  case'H':break;
  case'\0':break;
  case'\'':break;
  case'\\':break;
  }

• Logs from running C/C++: Log Diagnostics from the VS Code command palette logs_syntax_highlight_bug.txt

Screenshots

[sean-mcmanus]

This is not our bug, i.e. repros with our extension disabled. Can you file a bug at https://github.com/jeff-hykin/cpp-textmate-grammar/issues ? That is the repro for the C/C++ lexical colorization that is used by VS Code.

[MrExquisite]

Thank you and SFTI, moved to here.