Add support for logical assignment operators '&&=', '||=', and '??='. (#136)

Co-authored-by: Martin Jambon <Martin Jambon>

Author: mjambon

grammar.js

@@ -705,7 +705,8 @@ module.exports = grammar({
         $.identifier,
         $.parenthesized_expression,
       )),
-      choice('+=', '-=', '*=', '/=', '%=', '^=', '&=', '|=', '>>=', '>>>=', '<<=', '**='),
+      choice('+=', '-=', '*=', '/=', '%=', '^=', '&=', '|=', '>>=', '>>>=',
+             '<<=', '**=', '&&=', '||=', '??='),
       field('right', $._expression)
     )),
 

src/grammar.json

@@ -3133,6 +3133,18 @@
               {
                 "type": "STRING",
                 "value": "**="
+              },
+              {
+                "type": "STRING",
+                "value": "&&="
+              },
+              {
+                "type": "STRING",
+                "value": "||="
+              },
+              {
+                "type": "STRING",
+                "value": "??="
               }
             ]
           },

src/node-types.json

@@ -2800,6 +2800,10 @@
     "type": "&&",
     "named": false
   },
+  {
+    "type": "&&=",
+    "named": false
+  },
   {
     "type": "&=",
     "named": false
@@ -2948,6 +2952,10 @@
     "type": "??",
     "named": false
   },
+  {
+    "type": "??=",
+    "named": false
+  },
   {
     "type": "@",
     "named": false
@@ -3216,6 +3224,10 @@
     "type": "||",
     "named": false
   },
+  {
+    "type": "||=",
+    "named": false
+  },
   {
     "type": "}",
     "named": false