;; Forked from https://github.com/nvim-treesitter/nvim-treesitter/blob/master/queries/rust/highlights.scm
;; Licensed under the Apache License 2.0
; Identifier conventions
(identifier) @variable

(
  (identifier) @type
  (#lua-match? @type "^[A-Z]")
)

(const_item
  name: (identifier) @constant
)

; Assume all-caps names are constants
(
  (identifier) @constant
  (#lua-match? @constant "^[A-Z][A-Z%d_]*$")
)

; Other identifiers
(type_identifier) @type

(primitive_type) @type.builtin

(field_identifier) @field

(shorthand_field_initializer
  (identifier) @field
)

(mod_item
  name: (identifier) @namespace
)

(self) @variable.builtin

(loop_label
  [
    "'"
    (identifier)
  ] @label
)

; Function definitions
(function_item
  (identifier) @function
)

(function_signature_item
  (identifier) @function
)

(parameter
  (identifier) @parameter
)

(closure_parameters
  (_) @parameter
)

; Function calls
(call_expression
  function: (identifier) @function.call
)

(call_expression
  function: (scoped_identifier
    (identifier) @function.call
    .
  )
)

(call_expression
  function: (field_expression
    field: (field_identifier) @function.call
  )
)

(generic_function
  function: (identifier) @function.call
)

(generic_function
  function: (scoped_identifier
    name: (identifier) @function.call
  )
)

(generic_function
  function: (field_expression
    field: (field_identifier) @function.call
  )
)

; Assume other uppercase names are enum constructors
(
  (field_identifier) @constant
  (#lua-match? @constant "^[A-Z]")
)

(enum_variant
  name: (identifier) @constant
)

; Assume that uppercase names in paths are types
(scoped_identifier
  path: (identifier) @namespace
)

(scoped_identifier
  (scoped_identifier
    name: (identifier) @namespace
  )
)

(scoped_type_identifier
  path: (identifier) @namespace
)

(scoped_type_identifier
  path: (identifier) @type
  (#lua-match? @type "^[A-Z]")
)

(scoped_type_identifier
  (scoped_identifier
    name: (identifier) @namespace
  )
)

(
  (scoped_identifier
    path: (identifier) @type
  )
  (#lua-match? @type "^[A-Z]")
)

(
  (scoped_identifier
    name: (identifier) @type
  )
  (#lua-match? @type "^[A-Z]")
)

(
  (scoped_identifier
    name: (identifier) @constant
  )
  (#lua-match? @constant "^[A-Z][A-Z%d_]*$")
)

(
  (scoped_identifier
    path: (identifier) @type
    name: (identifier) @constant
  )
  (#lua-match? @type "^[A-Z]")
  (#lua-match? @constant "^[A-Z]")
)

(
  (scoped_type_identifier
    path: (identifier) @type
    name: (type_identifier) @constant
  )
  (#lua-match? @type "^[A-Z]")
  (#lua-match? @constant "^[A-Z]")
)

[
  (crate)
  (super)
] @namespace

(scoped_use_list
  path: (identifier) @namespace
)

(scoped_use_list
  path: (scoped_identifier
    (identifier) @namespace
  )
)

(use_list
  (scoped_identifier
    (identifier) @namespace
    .
    (_)
  )
)

(use_list
  (identifier) @type
  (#lua-match? @type "^[A-Z]")
)

(use_as_clause
  alias: (identifier) @type
  (#lua-match? @type "^[A-Z]")
)

; Correct enum constructors
(call_expression
  function: (scoped_identifier
    "::"
    name: (identifier) @constant
  )
  (#lua-match? @constant "^[A-Z]")
)

; Assume uppercase names in a match arm are constants.
(
  (match_arm
    pattern: (match_pattern
      (identifier) @constant
    )
  )
  (#lua-match? @constant "^[A-Z]")
)

(
  (match_arm
    pattern: (match_pattern
      (scoped_identifier
        name: (identifier) @constant
      )
    )
  )
  (#lua-match? @constant "^[A-Z]")
)

(
  (identifier) @constant.builtin
  (#any-of? @constant.builtin "Some" "None" "Ok" "Err")
)

; Macro definitions
"$" @function.macro

(metavariable) @function.macro

(macro_definition
  "macro_rules!" @function.macro
)

; Attribute macros
(attribute_item
  (attribute
    (identifier) @function.macro
  )
)

(attribute
  (scoped_identifier
    (identifier) @function.macro
    .
  )
)

; Derive macros (assume all arguments are types)
; (attribute
;   (identifier) @_name
;   arguments: (attribute (attribute (identifier) @type))
;   (#eq? @_name "derive"))
; Function-like macros
(macro_invocation
  macro: (identifier) @function.macro
)

(macro_invocation
  macro: (scoped_identifier
    (identifier) @function.macro
    .
  )
)

; Literals
[
  (line_comment)
  (block_comment)
] @comment @spell

(
  (line_comment) @comment.documentation
  (#lua-match? @comment.documentation "^///[^/]")
)

(
  (line_comment) @comment.documentation
  (#lua-match? @comment.documentation "^///$")
)

(
  (line_comment) @comment.documentation
  (#lua-match? @comment.documentation "^//!")
)

(
  (block_comment) @comment.documentation
  (#lua-match? @comment.documentation "^/[*][*][^*].*[*]/$")
)

(
  (block_comment) @comment.documentation
  (#lua-match? @comment.documentation "^/[*][!]")
)

(boolean_literal) @boolean

(integer_literal) @number

(float_literal) @float

[
  (raw_string_literal)
  (string_literal)
] @string

(escape_sequence) @string.escape

(char_literal) @character

; Keywords
[
  "use"
  "mod"
] @include

(use_as_clause
  "as" @include
)

[
  "default"
  "enum"
  "impl"
  "let"
  "move"
  "pub"
  "struct"
  "trait"
  "type"
  "union"
  "unsafe"
  "where"
] @keyword

[
  "async"
  "await"
] @keyword.coroutine

[
  "ref"
  (mutable_specifier)
] @type.qualifier

[
  "const"
  "static"
  "dyn"
  "extern"
] @storageclass

(lifetime
  [
    "'"
    (identifier)
  ] @storageclass.lifetime
)

"fn" @keyword.function

[
  "return"
  "yield"
] @keyword.return

(type_cast_expression
  "as" @keyword.operator
)

(qualified_type
  "as" @keyword.operator
)

(use_list
  (self) @namespace
)

(scoped_use_list
  (self) @namespace
)

(scoped_identifier
  [
    (crate)
    (super)
    (self)
  ] @namespace
)

(visibility_modifier
  [
    (crate)
    (super)
    (self)
  ] @namespace
)

[
  "if"
  "else"
  "match"
] @conditional

[
  "break"
  "continue"
  "in"
  "loop"
  "while"
] @repeat

"for" @keyword

(for_expression
  "for" @repeat
)

; Operators
[
  "!"
  "!="
  "%"
  "%="
  "&"
  "&&"
  "&="
  "*"
  "*="
  "+"
  "+="
  "-"
  "-="
  ".."
  "..="
  "/"
  "/="
  "<"
  "<<"
  "<<="
  "<="
  "="
  "=="
  ">"
  ">="
  ">>"
  ">>="
  "?"
  "@"
  "^"
  "^="
  "|"
  "|="
  "||"
] @operator

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

(closure_parameters
  "|" @punctuation.bracket
)

(type_arguments
  [
    "<"
    ">"
  ] @punctuation.bracket
)

(type_parameters
  [
    "<"
    ">"
  ] @punctuation.bracket
)

(bracketed_type
  [
    "<"
    ">"
  ] @punctuation.bracket
)

(for_lifetimes
  [
    "<"
    ">"
  ] @punctuation.bracket
)

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

(attribute_item
  "#" @punctuation.special
)

(inner_attribute_item
  [
    "!"
    "#"
  ] @punctuation.special
)

(macro_invocation
  "!" @function.macro
)

(empty_type
  "!" @type.builtin
)

(macro_invocation
  macro: (identifier) @exception
  "!" @exception
  (#eq? @exception "panic")
)

(macro_invocation
  macro: (identifier) @exception
  "!" @exception
  (#contains? @exception "assert")
)

(macro_invocation
  macro: (identifier) @debug
  "!" @debug
  (#eq? @debug "dbg")
)