;; Numbers.
(num) @number

;; Function names when defining.
(funcdef name: (word) @function)

;; Function calls.
(callexp fn: (word) @function.call)

;; Variables.
(word) @variable

;; Parameters inside function/lambda.
(params (word) @variable.parameter)

;; Operators.
[
  "+"
  "-"
  "*"
  "/"
  "="
] @operator

;; Lambdas.
"\\" @keyword

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

;; Commas.
"," @punctuation.delimiter