; Keywords
[
  "package" "import" "using" "option" "location" "bits" "type" "instance" "at"
  "struct" "union" "enum" "reg" "reserved" "assert_pos" "skip_to" "buffer"
  "ro" "rw" "wo"
] @keyword

; Keep directives preproc-colored and suppress nested captures
((directive) @attribute (#set! "priority" 120))
((directive (directive_element) @none) (#set! "priority" 121))
((directive (directive_element (identifier) @none)) (#set! "priority" 121))
((directive (directive_element (directive_value (string) @none))) (#set! "priority" 121))
((directive (directive_element (directive_value (number) @none))) (#set! "priority" 121))

[
  "(" ")" "[" "]" "{" "}" ";"
] @punctuation.bracket

[
  ":" "," "." "=" ";"
] @punctuation.delimiter

"@" @operator

(identifier) @variable
(name (identifier) @type)

(string) @string
(number) @number

(line_comment) @comment
(doc_comment) @comment.documentation

(bits_decl name: (identifier) @type)
(type_decl name: (identifier) @type)
(instance_decl name: (identifier) @variable)
(register_decl name: (identifier) @function)
(register_bits_decl name: (identifier) @field)