Add async statements

corpus/async.txt

@@ -10,14 +10,13 @@ async { (output 'Whaddup') }
   (item
     (statement
       (async
-        (item
         (statement
           (expression
             (function_call
               (tool)
               (expression
                 (value
-                    (string)))))))))))
+                  (string))))))))))
 
 ==================
 Complex Async Statements
@@ -39,7 +38,6 @@ async {
   (item
     (statement
       (async
-        (item
         (statement
           (if_else
             (if
@@ -79,4 +77,93 @@ async {
               (tool)
               (expression
                 (value
-                    (string)))))))))))
+                  (string))))))))))
+                    
+==================
+Simple Async Await Statements
+==================
+
+x = async {
+  1
+}
+
+
+---
+
+(root
+  (item
+    (statement
+      (assignment
+        (identifier)
+        (assignment_operator)
+        (statement
+          (async
+            (statement
+              (expression
+                (value
+                  (integer))))))))))
+                    
+==================
+Complex Async Await Statements
+==================
+
+x = async {
+  i = 0
+  while i < 5 {
+    (output i)
+    i += 1
+  }
+  (read "examples/assets/faithful.csv")
+}
+
+
+---
+
+(root
+  (item
+    (statement
+      (assignment
+        (identifier)
+        (assignment_operator)
+        (statement
+          (async
+            (statement
+              (assignment
+                (identifier)
+                (assignment_operator)
+                (statement
+                  (expression
+                    (value
+                      (integer))))))
+            (statement
+              (while
+                (expression
+                  (logic
+                    (expression
+                      (identifier))
+                    (logic_operator)
+                    (expression
+                      (value
+                        (integer)))))
+                (item
+                  (statement
+                    (expression
+                      (function_call
+                        (tool)
+                        (expression
+                          (identifier)))))
+                  (statement
+                    (assignment
+                      (identifier)
+                      (assignment_operator)
+                      (statement
+                        (expression
+                          (value
+                            (integer)))))))))
+            (statement
+              (expression
+                (function_call
+                  (tool)
+                  (expression
+                    (value
+                      (string))))))))))))

grammar.js

@@ -236,6 +236,12 @@ module.exports = grammar({
       ),
     )),
 
-    async: $ => seq('async', '{', $.item, '}'),
+    async: $ => seq(
+      'async', 
+      '{', 
+      repeat($.statement), 
+      '}'
+    ),
+
   }
 });

src/grammar.json

@@ -959,8 +959,11 @@
           "value": "{"
         },
         {
+          "type": "REPEAT",
+          "content": {
             "type": "SYMBOL",
-          "name": "item"
+            "name": "statement"
+          }
         },
         {
           "type": "STRING",

src/node-types.json

@@ -32,11 +32,11 @@
     "named": true,
     "fields": {},
     "children": {
-      "multiple": false,
+      "multiple": true,
-      "required": true,
+      "required": false,
       "types": [
         {
-          "type": "item",
+          "type": "statement",
           "named": true
         }
       ]