nvim-treesitter/queries/rust/highlights.scm

; Forked from https://github.com/tree-sitter/tree-sitter-rust
; Copyright (c) 2017 Maxim Sokolov
; Licensed under the MIT license.
; Identifier conventions
(shebang) @keyword.directive

(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) @variable.member

(shorthand_field_initializer
  (identifier) @variable.member)

(mod_item
  name: (identifier) @module)

[
  (self)
  "_"
] @variable.builtin

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

; Function definitions
(function_item
  (identifier) @function)

(function_signature_item
  (identifier) @function)

(parameter
  [
    (identifier)
    "_"
  ] @variable.parameter)

(closure_parameters
  (_) @variable.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) @module)

(scoped_identifier
  (scoped_identifier
    name: (identifier) @module))

(scoped_type_identifier
  path: (identifier) @module)

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

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

((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)
] @module

(scoped_use_list
  path: (identifier) @module)

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

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

(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))

(inner_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
  (doc_comment)) @comment.documentation

(block_comment
  (doc_comment)) @comment.documentation

(boolean_literal) @boolean

(integer_literal) @number

(float_literal) @number.float

[
  (raw_string_literal)
  (string_literal)
] @string

(escape_sequence) @string.escape

(char_literal) @character

; Keywords
[
  "use"
  "mod"
] @keyword.import

(use_as_clause
  "as" @keyword.import)

[
  "default"
  "impl"
  "let"
  "move"
  "unsafe"
  "where"
] @keyword

[
  "enum"
  "struct"
  "union"
  "trait"
  "type"
] @keyword.type

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

"try" @keyword.exception

[
  "ref"
  "pub"
  (mutable_specifier)
  "const"
  "static"
  "dyn"
  "extern"
] @keyword.modifier

(lifetime
  "'" @keyword.modifier)

(lifetime
  (identifier) @attribute)

(lifetime
  (identifier) @attribute.builtin
  (#any-of? @attribute.builtin "static" "_"))

"fn" @keyword.function

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

(type_cast_expression
  "as" @keyword.operator)

(qualified_type
  "as" @keyword.operator)

(use_list
  (self) @module)

(scoped_use_list
  (self) @module)

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

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

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

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

"for" @keyword

(for_expression
  "for" @keyword.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)

(never_type
  "!" @type.builtin)

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

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

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