update scala highlights (#1760)

* add type highlights

* add call expression highlights

* add function definition highlights

* add expression highlights

* add literals highlights

* add operator highlights

* add punctuation highlights

* add comment highlights

Co-authored-by: Stevan Milic <stevan.milic@tradecore.com>

queries/scala/highlights.scm

@@ -2,14 +2,29 @@
 
 ;; variables
 
-(
+(identifier) @variable
-  (identifier) @variable.builtin
-  (#match? @variable.builtin "^this$")
-)
 
-;; method calls
+((identifier) @variable.builtin
+ (#match? @variable.builtin "^this$"))
+
+;; types
+
+(type_identifier) @type
+
+(class_definition
+  name: (identifier) @type)
+
+(object_definition
+  name: (identifier) @type)
+
+(trait_definition
+  name: (identifier) @type)
+
+(type_definition
+  name: (type_identifier) @type)
 
 ; method definition
+
 (class_definition
   body: (template_body
     (function_definition
@@ -24,15 +39,52 @@
       name: (identifier) @method)))
 
 ; method invocation
+
+(call_expression
+  function: (identifier) @function)
+
 (call_expression
   function: (field_expression
     field: (identifier) @method))
 
+(generic_function
+  function: (identifier) @function)
+
 (
   (identifier) @function.builtin
   (#match? @function.builtin "^super$")
 )
 
+; function definitions
+
+(function_definition
+  name: (identifier) @function)
+
+(parameter
+  name: (identifier) @parameter)
+
+; expressions
+
+(field_expression field: (identifier) @property)
+
+(infix_expression operator: (identifier) @operator)
+(infix_expression operator: (operator_identifier) @operator)
+(infix_type operator: (operator_identifier) @operator)
+(infix_type operator: (operator_identifier) @operator)
+
+; literals
+
+(boolean_literal) @boolean
+(integer_literal) @number
+(floating_point_literal) @float
+(string) @string
+
+[
+(symbol_literal)
+(string)
+(character_literal)
+] @string
+
 ;; keywords
 
 [
@@ -71,6 +123,20 @@
   "match"
 ] @conditional
 
+[
+ "("
+ ")"
+ "["
+ "]"
+ "{"
+ "}"
+]  @punctuation.bracket
+
+[
+ "."
+ ","
+] @punctuation.delimiter
+
 [
   "do"
   "for"
@@ -80,6 +146,11 @@
 
 "def" @keyword.function
 
+[
+ "=>"
+ "<-"
+] @operator
+
 "import" @include
 
 [
@@ -90,6 +161,8 @@
 
 "return" @keyword.return
 
+(comment) @comment
+
 ;; `case` is a conditional keyword in case_block
 
 (case_block