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;;; Highlighting for lua

;;; Builtins
((identifier) @variable.builtin
 (#eq? @variable.builtin "self"))

;; Keywords

(if_statement
[
  "if"
  "then"
  "end"
] @keyword.control.conditional)

(elseif_statement
[
  "elseif"
  "then"
  "end"
] @keyword.control.conditional)

(else_statement
[
  "else"
  "end"
] @keyword.control.conditional)

(for_statement
[
  "for"
  "do"
  "end"
] @keyword.control.repeat)

(while_statement
[
  "while"
  "do"
  "end"
] @keyword.control.repeat)

(repeat_statement
[
  "repeat"
  "until"
] @keyword.control.repeat)

(do_statement
[
  "do"
  "end"
] @keyword)

"return" @keyword.control.return

[
 "in"
 "local"
 (break_statement)
 "goto"
] @keyword

(function_declaration
[
  "function"
  "end"
] @keyword.function)

(function_definition
[
  "function"
  "end"
] @keyword.function)

;; Operators

[
 "not"
 "and"
 "or"
] @keyword.operator

[
"="
"~="
"=="
"<="
">="
"<"
">"
"+"
"-"
"%"
"/"
"//"
"*"
"^"
"&"
"~"
"|"
">>"
"<<"
".."
"#"
 ] @operator

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

;; Brackets

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

; ;; Constants
[
(false)
(true)
] @constant.builtin.boolean
(nil) @constant.builtin
(vararg_expression) @constant

((identifier) @constant
 (#match? @constant "^[A-Z][A-Z_0-9]*$"))

;; Parameters
(parameters
  (identifier) @variable.parameter)

; ;; Functions
(function_declaration name: (identifier) @function)
(function_call name: (identifier) @function.call)

(function_declaration name: (dot_index_expression field: (identifier) @function))
(function_call name: (dot_index_expression field: (identifier) @function.call))

; TODO: incorrectly highlights variable N in `N, nop = 42, function() end`
(assignment_statement
    (variable_list
      name: (identifier) @function)
    (expression_list
      value: (function_definition)))

(method_index_expression method: (identifier) @function.method)

;; Nodes
(comment) @comment
(string) @string
(number) @constant.numeric.integer
(label_statement) @label
; A bit of a tricky one, this will only match field names
(field . (identifier) @variable.other.member (_))
(hash_bang_line) @comment

;; Property
(dot_index_expression field: (identifier) @variable.other.member)

;; Variable
(identifier) @variable

;; Error
(ERROR) @error