(comment) @comment

; Keywords
[
  ; vhdl 08
  "abs"
  "access"
  "after"
  "alias"
  "all"
  "and"
  "architecture"
  "array"
  "assert"
  "attribute"
  "begin"
  "block"
  "body"
  "buffer"
  "bus"
  "case"
  "component"
  "configuration"
  "constant"
  "disconnect"
  "downto"
  "else"
  "elsif"
  "end"
  "entity"
  "exit"
  "file"
  "for"
  "function"
  "generic"
  "group"
  "guarded"
  "if"
  "impure"
  "in"
  "inertial"
  "inout"
  "is"
  "label"
  "library"
  "linkage"
  "literal"
  "loop"
  "map"
  "mod"
  "nand"
  "new"
  "next"
  "nor"
  "not"
  "null"
  "of"
  "on"
  "open"
  "or"
  "others"
  "out"
  "package"
  "port"
  "postponed"
  "procedure"
  "process"
  "protected"
  "pure"
  "range"
  "record"
  "register"
  "reject"
  "rem"
  "report"
  "return"
  "rol"
  "ror"
  "select"
  "severity"
  "shared"
  "signal"
  "sla"
  "sll"
  "sra"
  "srl"
  "subtype"
  "then"
  "to"
  "transport"
  "type"
  "unaffected"
  "units"
  "until"
  "use"
  "variable"
  "wait"
  "when"
  "while"
  "with"
  "xnor"
  "xor"
  ; vhdl 08
  "context"
  "force"
  "property"
  "release"
  "sequence"
] @keyword

[
  ; vhdl 02
  "boolean"
  "bit"
  "bit_vector"
  ;"character"
  ;"severity_level"
  ;"integer"
  ;"real"
  ;"time"
  ;"natural"
  ;"positive"
  "string"
  ;"line"
  ;"text"
  ;"side"
  ;"unsigned"
  ;"signed"
  ;"delay_length"
  ;"file_open_kind"
  ;"file_open_status"
  ;"std_logic"
  ;"std_logic_vector"
  ;"std_ulogic"
  ;"std_ulogic_vector"
  ; vhdl 08
  ;"boolean_vector"
  ;"integer_vector"
  ;"real_vector"
  ;"time_vector"
  ; math types
  ;"complex"
  ;"complex_polar"
  ;"positive_real"
  ;"principal_value"
] @type.builtin

[
  ; vhdl 02
  "base"
  "left"
  "right"
  "high"
  "low"
  "pos"
  "val"
  "succ"
  "pred"
  "leftof"
  "rightof"
  "range"
  "reverse_range"
  "length"
  "delayed"
  "stable"
  "quiet"
  "transaction"
  "event"
  "active"
  "last_event"
  "last_active"
  "last_value"
  "driving"
  "driving_value"
  "ascending"
  "value"
  "image"
  "simple_name"
  "instance_name"
  "path_name"
  ;"foreign"
  ; vhdl 08
  "instance_name"
  "path_name"
] @attribute

;[
  ; vhdl 02
  ;"now"
  ;"resolved"
  ;"rising_edge"
  ;"falling_edge"
  ;"read"
  ;"readline"
  ;"hread"
  ;"oread"
  ;"write"
  ;"writeline"
  ;"hwrite"
  ;"owrite"
  ;"endfile"
  ;"resize"
  ;"is_X"
  ;"std_match"
  ;"shift_left"
  ;"shift_right"
  ;"rotate_left"
  ;"rotate_right"
  ;"to_unsigned"
  ;"to_signed"
  ;"to_integer"
  ;"to_stdLogicVector"
  ;"to_stdULogic"
  ;"to_stdULogicVector"
  ;"to_bit"
  ;"to_bitVector"
  ;"to_X01"
  ;"to_X01Z"
  ;"to_UX01"
  ;"to_01"
  ;"conv_unsigned"
  ;"conv_signed"
  ;"conv_integer"
  ;"conv_std_logic_vector"
  ;"shl"
  ;"shr"
  ;"ext"
  ;"sxt"
  ;"deallocate"
  ; vhdl 08
  ;"finish"
  ;"flush"
  ;"justify"
  ;"maximum"
  ;"minimum"
  ;"resolution_limit"
  ;"stop"
  ;"swrite"
  ;"tee"
  ;"to_binarystring"
  ;"to_bstring"
  ;"to_hexstring"
  ;"to_hstring"
  ;"to_octalstring"
  ;"to_ostring"
  ;"to_string"
  ; vhdl math
  ;"arccos"
  ;"arccosh"
  ;"arcsin"
  ;"arcsinh"
  ;"arctan"
  ;"arctanh"
  ;"arg"
  ;"cbrt"
  ;"ceil"
  ;"cmplx"
  ;"complex_to_polar"
  ;"conj"
  ;"cos"
  ;"cosh"
  ;"exp"
  ;"floor"
  ;"get_principal_value"
  ;"log"
  ;"log10"
  ;"log2"
  ;"polar_to_complex"
  ;"realmax"
  ;"realmin"
  ;"round"
  ;"sign"
  ;"sin"
  ;"sinh"
  ;"sqrt"
  ;"tan"
  ;"tanh"
  ;"trunc"
  ;"uniform"
;] @function.builtin

; Operators
[
  "+"
  "-"
  "*"
  "/"
  "**"
  "abs"
  "not"
  "mod"
  "rem"
  "&"
  "sll"
  "srl"
  "sla"
  "sra"
  "rol"
  "ror"
  "="
  "/="
  "?="
  "?/="
  "?<"
  "?<="
  "?>"
  "?>="
  "<"
  "<="
  ">"
  ">="
  "and"
  "or"
  "nand"
  "nor"
  "xor"
  "xnor"
  ":="
  "<="
  "??"
] @operator

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

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

(full_type_declaration "type" name: (identifier) @type)
(signal_declaration "signal" (identifier_list) @variable)
(variable_declaration "variable" (identifier_list) @variable)
(constant_declaration "constant" (identifier_list) @variable)