add support for ocaml mli files

queries/ocaml-interface/highlights.scm

@@ -0,0 +1,147 @@
+; Modules
+;--------
+
+[(module_name) (module_type_name)] @constructor
+
+; Types
+;------
+
+(
+  (type_constructor) @type.builtin
+  (#match? @type.builtin "^(int|char|bytes|string|float|bool|unit|exn|array|list|option|int32|int64|nativeint|format6|lazy_t)$")
+)
+
+[(class_name) (class_type_name) (type_constructor)] @type
+
+[(constructor_name) (tag)] @tag
+
+; Functions
+;----------
+
+(let_binding
+  pattern: (value_name) @function
+  (parameter))
+
+(let_binding
+  pattern: (value_name) @function
+  body: [(fun_expression) (function_expression)])
+
+(value_specification (value_name) @function)
+
+(external (value_name) @function)
+
+(method_name) @function.method
+
+; Application
+;------------
+
+(
+  (value_name) @function.builtin
+  (#match? @function.builtin "^(raise(_notrace)?|failwith|invalid_arg)$")
+)
+
+(infix_expression
+  left: (value_path (value_name) @function)
+  (infix_operator) @operator
+  (#eq? @operator "@@"))
+
+(infix_expression
+  (infix_operator) @operator
+  right: (value_path (value_name) @function)
+  (#eq? @operator "|>"))
+
+(application_expression
+  function: (value_path (value_name) @function))
+
+; Variables
+;----------
+
+[(value_name) (type_variable)] @variable
+
+(value_pattern) @variable.parameter
+
+; Properties
+;-----------
+
+[(label_name) (field_name) (instance_variable_name)] @property
+
+; Constants
+;----------
+
+(boolean) @constant
+
+[(number) (signed_number)] @number
+
+[(string) (character)] @string
+
+(quoted_string "{" @string "}" @string) @string
+
+(escape_sequence) @escape
+
+(conversion_specification) @string.special
+
+; Operators
+;----------
+
+(match_expression (match_operator) @keyword)
+
+(value_definition [(let_operator) (and_operator)] @keyword)
+
+[
+  (prefix_operator)
+  (sign_operator)
+  (infix_operator)
+  (hash_operator)
+  (indexing_operator)
+  (let_operator)
+  (and_operator)
+  (match_operator)
+] @operator
+
+(infix_operator ["&" "+" "-" "=" ">" "|" "%"] @operator)
+(signed_number ["+" "-"] @operator)
+
+["*" "#" "::" "<-"] @operator
+
+; Keywords
+;---------
+
+[
+  "and" "as" "assert" "begin" "class" "constraint" "do" "done" "downto" "else"
+  "end" "exception" "external" "for" "fun" "function" "functor" "if" "in"
+  "include" "inherit" "initializer" "lazy" "let" "match" "method" "module"
+  "mutable" "new" "nonrec" "object" "of" "open" "private" "rec" "sig" "struct"
+  "then" "to" "try" "type" "val" "virtual" "when" "while" "with"
+] @keyword
+
+; Punctuation
+;------------
+
+(attribute ["[@" "]"] @punctuation.special)
+(item_attribute ["[@@" "]"] @punctuation.special)
+(floating_attribute ["[@@@" "]"] @punctuation.special)
+(extension ["[%" "]"] @punctuation.special)
+(item_extension ["[%%" "]"] @punctuation.special)
+(quoted_extension ["{%" "}"] @punctuation.special)
+(quoted_item_extension ["{%%" "}"] @punctuation.special)
+
+"%" @punctuation.special
+
+["(" ")" "[" "]" "{" "}" "[|" "|]" "[<" "[>"] @punctuation.bracket
+
+(object_type ["<" ">"] @punctuation.bracket)
+
+[
+  "," "." ";" ":" "=" "|" "~" "?" "+" "-" "!" ">" "&"
+  "->" ";;" ":>" "+=" ":=" ".."
+] @punctuation.delimiter
+
+; Attributes
+;-----------
+
+(attribute_id) @attribute
+
+; Comments
+;---------
+
+[(comment) (line_number_directive) (directive) (shebang)] @comment