Add selectors as arguments to :not

corpus/selectors.txt

@@ -179,3 +179,26 @@ a.b ~ c.d {}
       (class_selector (class_selector (class_name)) (class_name))
       (class_selector (class_selector (class_name)) (class_name))))
     (block)))
+
+===========================
+The :not selector
+===========================
+
+a:not(:hover) {}
+.b:not(c > .d) {}
+
+---
+
+(stylesheet
+  (rule_set
+    (selectors (pseudo_class_selector
+      (tag_name)
+      (class_name)
+      (arguments (pseudo_class_selector (class_name)))))
+    (block))
+  (rule_set
+    (selectors (pseudo_class_selector
+      (class_selector (class_name))
+      (class_name)
+      (arguments (child_selector (tag_name) (class_selector (class_name))))))
+    (block)))

grammar.js

@@ -137,7 +137,7 @@ module.exports = grammar({
       optional($._selector),
       ':',
       alias($.identifier, $.class_name),
-      optional($.arguments)
+      optional(alias($.pseudo_class_arguments, $.arguments))
     ),
 
     pseudo_element_selector: $ => seq(
@@ -171,6 +171,12 @@ module.exports = grammar({
 
     adjacent_sibling_selector: $ => prec.left(seq($._selector, '+', $._selector)),
 
+    pseudo_class_arguments: $ => seq(
+      token.immediate('('),
+      commaSep(choice($._selector, repeat1($._value))),
+      ')'
+    ),
+
     // Declarations
 
     declaration: $ => prec(1, seq(
@@ -232,7 +238,7 @@ module.exports = grammar({
 
     // Property Values
 
-    _value: $ => choice(
+    _value: $ => prec(-1, choice(
       alias($.identifier, $.plain_value),
       $.plain_value,
       $.color_value,
@@ -241,7 +247,7 @@ module.exports = grammar({
       $.string_value,
       $.binary_expression,
       $.call_expression
-    ),
+    )),
 
     color_value: $ => /#[0-9a-fA-F]{3,8}/,
 

src/grammar.json

@@ -548,8 +548,13 @@
           "type": "CHOICE",
           "members": [
             {
+              "type": "ALIAS",
+              "content": {
                 "type": "SYMBOL",
-              "name": "arguments"
+                "name": "pseudo_class_arguments"
+              },
+              "named": true,
+              "value": "arguments"
             },
             {
               "type": "BLANK"
@@ -782,6 +787,79 @@
         ]
       }
     },
+    "pseudo_class_arguments": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "IMMEDIATE_TOKEN",
+          "content": {
+            "type": "STRING",
+            "value": "("
+          }
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "CHOICE",
+                  "members": [
+                    {
+                      "type": "SYMBOL",
+                      "name": "_selector"
+                    },
+                    {
+                      "type": "REPEAT1",
+                      "content": {
+                        "type": "SYMBOL",
+                        "name": "_value"
+                      }
+                    }
+                  ]
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "CHOICE",
+                        "members": [
+                          {
+                            "type": "SYMBOL",
+                            "name": "_selector"
+                          },
+                          {
+                            "type": "REPEAT1",
+                            "content": {
+                              "type": "SYMBOL",
+                              "name": "_value"
+                            }
+                          }
+                        ]
+                      }
+                    ]
+                  }
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "STRING",
+          "value": ")"
+        }
+      ]
+    },
     "declaration": {
       "type": "PREC",
       "value": 1,
@@ -1002,6 +1080,9 @@
       ]
     },
     "_value": {
+      "type": "PREC",
+      "value": -1,
+      "content": {
         "type": "CHOICE",
         "members": [
           {
@@ -1042,6 +1123,7 @@
             "name": "call_expression"
           }
         ]
+      }
     },
     "color_value": {
       "type": "PATTERN",