nvim-treesitter/queries/query/highlights.scm

(string) @string
(escape_sequence) @string.escape
(capture (identifier) @type)
(anonymous_node (identifier) @string)
(predicate name: (identifier) @function.call)
(named_node name: (identifier) @variable)
(field_definition name: (identifier) @property)
(negated_field "!" @operator (identifier) @property)
(comment) @comment @spell

(quantifier) @operator
(predicate_type) @punctuation.special

"." @operator

[
  "["
  "]"
  "("
  ")"
] @punctuation.bracket

":" @punctuation.delimiter
["@" "#"] @punctuation.special
"_" @constant

((parameters (identifier) @number)
 (#match? @number "^[-+]?[0-9]+(.[0-9]+)?$"))

((program . (comment)* . (comment) @include)
 (#lua-match? @include "^;+ *inherits *:"))

((program . (comment)* . (comment) @preproc)
 (#lua-match? @preproc "^;+ *extends *$"))

((predicate
  name: (identifier) @_name
  parameters: (parameters (string "\"" @string "\"" @string) @string.regex))
 (#any-of? @_name
   "match"
   "not-match"
   "vim-match"
   "not-vim-match"
   "lua-match"
   "not-lua-match"))

((predicate
  name: (identifier) @_name
  parameters: (parameters (string "\"" @string "\"" @string) @string.regex . (string) .))
 (#any-of? @_name "gsub" "not-gsub"))