The fixed keyword in fixed-size buffer field declarations was not being highlighted, appearing in default text color instead of as a storage modifier like public and unsafe.

Changes

• Grammar: Added fixed-size-buffer-declaration pattern to handle the distinct syntax of fixed-size buffers (fixed <type> <name>[<size>])

  • Captures fixed as storage.modifier.fixed.cs
  • Parses buffer type, name, and size expression in brackets
  • Positioned before field-declaration to match correctly

• Tests: Added test token and three test cases covering:

  • Basic fixed-size buffer: public fixed byte Buffer[30]
  • With unsafe modifier: public unsafe fixed byte Buffer[30]
  • With const size reference: public unsafe fixed byte Buffer[length]

Example

unsafe struct B
{
    public fixed byte Buffer[30];  // 'fixed' now highlighted as storage modifier
}

struct C
{
    public const int length = 30;
    public unsafe fixed byte Buffer[length];  // works with const references
}

• Fixes fixed-size buffer syntax #318

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.