add new highlights (#17)

* add new highlights

* more highlights

* @variable.parameter to @parameter

* add ERROR highlight

queries/highlights.scm

@@ -1,22 +1,33 @@
 ; highlights.scm
 
 (call function: (identifier) @function)
-(namespace_get function: (identifier) @function.method)
-(namespace_get_internal function: (identifier) @function.method)
+(call arguments:
+ (arguments
+  name: (identifier) @parameter ))
+
+(lambda_function "\\" @operator)
+
+(namespace_get function: (identifier) @method)
+(namespace_get_internal function: (identifier) @method)
+
+(namespace_get namespace: (identifier) @namespace
+ "::" @operator)
+(namespace_get_internal namespace: (identifier) @namespace
+ ":::" @operator)
 
 ; Literals
 
 (integer) @number
 
-(float) @number
+(float) @float
 
 (complex) @number
 
 (string) @string
 
 (comment) @comment
 
-(formal_parameters (identifier) @variable.parameter)
+(formal_parameters (identifier) @parameter)
 
 (identifier) @variable
 
@@ -67,21 +78,43 @@
  "}"
 ] @punctuation.bracket
 
+(dollar "$" @operator)
+
+(subset2
+  "[[" @punctuation.bracket
+  "]]" @punctuation.bracket)
+
 [
- "while"
- "if"
- "else"
- "function"
- "repeat"
- "for"
  "in"
  (dots)
- (true)
- (false)
  (break)
  (next)
  (inf)
- (nan)
- (na)
- (null)
 ] @keyword
+
+[
+  (nan)
+  (na)
+  (null)
+] @type.builtin
+
+[
+  "if"
+  "else"
+] @conditional
+
+[
+  "while"
+  "repeat"
+  "for"
+] @repeat
+
+[
+  (true)
+  (false)
+] @boolean
+
+"function" @keyword.function
+
+; Error
+(ERROR) @error