Support class static blocks (#235)

* Support class static blocks

* Use statement_block for class_static_block

Author: Shraymonks

grammar.js

@@ -1103,6 +1103,7 @@ module.exports = grammar({
       repeat(choice(
         seq(field('member', $.method_definition), optional(';')),
         seq(field('member', $.field_definition), $._semicolon),
+        field('member', $.class_static_block),
         field('template', $.glimmer_template)
       )),
       '}'
@@ -1124,6 +1125,11 @@ module.exports = grammar({
       ')'
     ),
 
+    class_static_block: $ => seq(
+      'static',
+      field('body', $.statement_block)
+    ),
+
     // This negative dynamic precedence ensures that during error recovery,
     // unfinished constructs are generally treated as literal expressions,
     // not patterns.

src/grammar.json

@@ -5973,6 +5973,14 @@
                   }
                 ]
               },
+              {
+                "type": "FIELD",
+                "name": "member",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "class_static_block"
+                }
+              },
               {
                 "type": "FIELD",
                 "name": "template",
@@ -6101,6 +6109,23 @@
         }
       ]
     },
+    "class_static_block": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "static"
+        },
+        {
+          "type": "FIELD",
+          "name": "body",
+          "content": {
+            "type": "SYMBOL",
+            "name": "statement_block"
+          }
+        }
+      ]
+    },
     "pattern": {
       "type": "PREC_DYNAMIC",
       "value": -1,

src/node-types.json

@@ -873,6 +873,10 @@
         "multiple": true,
         "required": false,
         "types": [
+          {
+            "type": "class_static_block",
+            "named": true
+          },
           {
             "type": "field_definition",
             "named": true
@@ -956,6 +960,22 @@
       ]
     }
   },
+  {
+    "type": "class_static_block",
+    "named": true,
+    "fields": {
+      "body": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "statement_block",
+            "named": true
+          }
+        ]
+      }
+    }
+  },
   {
     "type": "computed_property_name",
     "named": true,