Simplify nodetypes for _pattern_constant

* alias 'pattern_constant_resolution' as 'scope_resolution'
* replace 'pattern_constant' with just 'constant'

Author: aibaars

grammar.js

@@ -522,13 +522,11 @@ module.exports = grammar({
     variable_reference_pattern: $ => seq('^', field('name', $.identifier)),
 
     _pattern_constant: $ => choice(
-      $.pattern_constant,
-      $.pattern_constant_resolution
+      $.constant,
+      alias($._pattern_constant_resolution, $.scope_resolution)
     ),
 
-    pattern_constant: $ => field('name', $.constant),
-
-    pattern_constant_resolution: $ => seq(
+    _pattern_constant_resolution: $ => seq(
       optional(field('scope', $._pattern_constant)),
       '::',
       field('name', $.constant)

src/grammar.json

@@ -2763,23 +2763,20 @@
       "members": [
         {
           "type": "SYMBOL",
-          "name": "pattern_constant"
+          "name": "constant"
         },
         {
-          "type": "SYMBOL",
-          "name": "pattern_constant_resolution"
+          "type": "ALIAS",
+          "content": {
+            "type": "SYMBOL",
+            "name": "_pattern_constant_resolution"
+          },
+          "named": true,
+          "value": "scope_resolution"
         }
       ]
     },
-    "pattern_constant": {
-      "type": "FIELD",
-      "name": "name",
-      "content": {
-        "type": "SYMBOL",
-        "name": "constant"
-      }
-    },
-    "pattern_constant_resolution": {
+    "_pattern_constant_resolution": {
       "type": "SEQ",
       "members": [
         {

src/node-types.json

@@ -160,11 +160,11 @@
     "named": true,
     "subtypes": [
       {
-        "type": "pattern_constant",
+        "type": "constant",
         "named": true
       },
       {
-        "type": "pattern_constant_resolution",
+        "type": "scope_resolution",
         "named": true
       }
     ]
@@ -2546,48 +2546,6 @@
       ]
     }
   },
-  {
-    "type": "pattern_constant",
-    "named": true,
-    "fields": {
-      "name": {
-        "multiple": false,
-        "required": true,
-        "types": [
-          {
-            "type": "constant",
-            "named": true
-          }
-        ]
-      }
-    }
-  },
-  {
-    "type": "pattern_constant_resolution",
-    "named": true,
-    "fields": {
-      "name": {
-        "multiple": false,
-        "required": true,
-        "types": [
-          {
-            "type": "constant",
-            "named": true
-          }
-        ]
-      },
-      "scope": {
-        "multiple": false,
-        "required": false,
-        "types": [
-          {
-            "type": "_pattern_constant",
-            "named": true
-          }
-        ]
-      }
-    }
-  },
   {
     "type": "pattern_pair",
     "named": true,
@@ -2946,6 +2904,10 @@
         "multiple": false,
         "required": false,
         "types": [
+          {
+            "type": "_pattern_constant",
+            "named": true
+          },
           {
             "type": "_primary",
             "named": true