tree-sitter-cpp

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Did you check existing issues?

• [x] I have read all the tree-sitter docs if it relates to using the parser
• [X] I have searched the existing issues of tree-sitter-cpp

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

No response

Describe the bug

Clang supports nullability attributes in the form of _Nullable or _Nonnull: https://clang.llvm.org/docs/AttributeReference.html#nullability-attributes. These attributes are not supported by tree-sitter-cpp.

The codebase I'm working with has a lots of these and it breaks tree-sitter based tooling since ASTs are parsed incorrectly/with errors

Steps To Reproduce/Bad Parse Tree

Tried this on the playground:

// Code: C++
int _Nonnull n;

Generated AST:

translation_unit [0, 0] - [1, 0]
  declaration [0, 0] - [0, 15]
    type: primitive_type [0, 0] - [0, 3]
    declarator: identifier [0, 4] - [0, 12]
    ERROR [0, 13] - [0, 14]
      identifier [0, 13] - [0, 14]

It considers _Nonnull as an identified and 'n' as an error node.

Expected Behavior/Parse Tree

• No AST errors
• '_Nonnull' is considered an attribute

Repro

void foo() {
  int _Nonnull n;
}