highlights(elm): improve highlights

queries/elm/highlights.scm

@@ -1,12 +1,18 @@
-[(line_comment) (block_comment)] @comment
+[
+  (line_comment)
+  (block_comment)
+] @comment
+
 
 ; Keywords
+;---------
+
 [
-    "if"
-    "then"
-    "else"
-    (case)
-    (of)
+  "if"
+  "then"
+  "else"
+  (case)
+  (of)
 ] @conditional
 
 [
@@ -14,18 +20,28 @@
   "in"
   (as)
   (port)
-  (exposing)
   (alias)
   (infix)
   (module)
+  (type)
 ] @keyword
 
+[
+  (import)
+  (exposing)
+] @include
+
+
+; Punctuation
+;------------
+
 [
   (double_dot)
-  "|"
 ] @punctuation.special
+
 [
   ","
+  "|"
   (dot)
 ] @punctuation.delimiter
 
@@ -34,65 +50,151 @@
   ")"
   "{"
   "}"
+  "["
+  "]"
 ] @punctuation.bracket
 
+
+; Variables
+;----------
+
+(value_qid
+  (lower_case_identifier) @variable)
+(value_declaration
+  (function_declaration_left (lower_case_identifier) @variable))
 (type_annotation
-  (lower_case_identifier) @function)
+  (lower_case_identifier) @variable)
 (port_annotation
-  (lower_case_identifier) @function)
+  (lower_case_identifier) @variable)
+(anything_pattern
+  (underscore) @variable)
+(record_base_identifier
+  (lower_case_identifier) @variable)
+(lower_pattern
+  (lower_case_identifier) @variable)
+(exposed_value
+  (lower_case_identifier) @variable)
+
+(value_qid
+  ((dot) (lower_case_identifier) @field))
+(field_access_expr
+  ((dot) (lower_case_identifier) @field))
+
 (function_declaration_left
-  (lower_case_identifier) @function)
+  (anything_pattern (underscore) @parameter))
+(function_declaration_left
+  (lower_pattern (lower_case_identifier) @parameter))
+
+
+; Functions
+;----------
+
+(value_declaration
+  functionDeclarationLeft:
+    (function_declaration_left
+      (lower_case_identifier) @function
+      (pattern)))
+(value_declaration
+  functionDeclarationLeft:
+    (function_declaration_left
+      (lower_case_identifier) @function
+      pattern: (_)))
+(value_declaration
+  functionDeclarationLeft:
+    (function_declaration_left
+      (lower_case_identifier) @function)
+  body: (anonymous_function_expr))
+(type_annotation
+  name: (lower_case_identifier) @function
+  typeExpression: (type_expression (arrow)))
+(port_annotation
+  name: (lower_case_identifier) @function
+  typeExpression: (type_expression (arrow)))
+
 (function_call_expr
-  target: (value_expr) @function)
+  target: (value_expr
+    (value_qid (lower_case_identifier) @function.call)))
 
-(value_qid (upper_case_identifier) @constructor)
-(value_qid ((dot) (lower_case_identifier) @field))
-(field_access_expr ((dot) (lower_case_identifier) @field))
 
-(lower_pattern) @parameter
-(record_base_identifier) @method
-
-[
-  (backslash)
-  (underscore)
-] @function
+; Operators
+;----------
 
 [
   (operator_identifier)
   (eq)
   (colon)
   (arrow)
+  (backslash)
+  "::"
 ] @operator
 
-(import) @include
 
-(number_constant_expr) @number
-
-(type) @keyword
+; Modules
+;--------
 
 (module_declaration
-  (upper_case_qid (upper_case_identifier)) @constructor)
-(type_declaration
-  (upper_case_identifier) @constructor)
-(type_ref) @type
-(type_alias_declaration
-  name: (upper_case_identifier) @type.definition)
-(field_type name:
-    (lower_case_identifier) @property)
-
-(union_variant
-  (upper_case_identifier) @symbol)
-(union_pattern) @symbol
+  (upper_case_qid (upper_case_identifier) @namespace))
+(import_clause
+  (upper_case_qid (upper_case_identifier) @namespace))
+(as_clause
+  (upper_case_identifier) @namespace)
 (value_expr
-  (upper_case_qid (upper_case_identifier)) @symbol)
+  (value_qid (upper_case_identifier) @namespace))
 
-; strings
-(string_escape) @string
-(open_quote) @string
-(close_quote) @string
-(regular_string_part) @string
+
+; Types
+;------
+
+(type_declaration
+  (upper_case_identifier) @type)
+(type_ref
+  (upper_case_qid (upper_case_identifier) @type))
+(type_variable
+  (lower_case_identifier) @type)
+(lower_type_name
+  (lower_case_identifier) @type)
+(exposed_type
+  (upper_case_identifier) @type)
+
+(type_alias_declaration
+  (upper_case_identifier) @type.definition)
+
+(field_type
+  name: (lower_case_identifier) @property)
+(field
+  name: (lower_case_identifier) @property)
+
+(type_declaration
+  (union_variant (upper_case_identifier) @constructor))
+(union_pattern
+  (upper_case_qid (upper_case_identifier) @constructor))
+(value_expr
+  (upper_case_qid (upper_case_identifier)) @constructor)
+
+
+; Literals
+;---------
+
+(number_constant_expr
+  (number_literal) @number)
+
+(upper_case_qid
+  ((upper_case_identifier) @_bool (#match? @_bool "(True|False)")) @boolean)
+
+[
+  (open_quote)
+  (close_quote)
+] @string
+(string_constant_expr
+  (string_escape) @string)
+(string_constant_expr
+  (regular_string_part) @string)
 
 [
   (open_char)
   (close_char)
 ] @character
+(char_constant_expr
+  (string_escape) @character)
+(char_constant_expr
+  (regular_string_part) @character)