Add equality operator

bindings/dust

@@ -1 +1 @@
-Subproject commit 3182e7c860ac74d1d4e2846152eef45c4111bd63
+Subproject commit ad429b35634097c1f81a7ce01f5890fb4594a128

grammar.js

@@ -1,6 +1,8 @@
 module.exports = grammar({
   name: 'dust',
 
+  word: $ => $.identifier,
+
   rules: {
     root: $ => repeat1($.item),
     
@@ -21,10 +23,10 @@ module.exports = grammar({
     open_statement: $ => prec.left(seq($.expression)),
 
     expression: $ => choice(
-      prec(0, $.control_flow),
+      $.value,
-      prec(1, $.value),
+      $.identifier,
-      prec(2, $.identifier),
+      $.operation,
-      prec(3, $.operation),
+      $.control_flow,
     ),
 
     close: $ => ";",
@@ -66,6 +68,7 @@ module.exports = grammar({
       '+',
       '-',
       '=',
+      '==',
     ),
 
     operation: $ => prec.left(seq(

src/grammar.json

@@ -1,5 +1,6 @@
 {
   "name": "dust",
+  "word": "identifier",
   "rules": {
     "root": {
       "type": "REPEAT1",
@@ -84,36 +85,20 @@
       "type": "CHOICE",
       "members": [
         {
-          "type": "PREC",
-          "value": 0,
-          "content": {
-            "type": "SYMBOL",
-            "name": "control_flow"
-          }
-        },
-        {
-          "type": "PREC",
-          "value": 1,
-          "content": {
           "type": "SYMBOL",
           "name": "value"
-          }
         },
         {
-          "type": "PREC",
-          "value": 2,
-          "content": {
           "type": "SYMBOL",
           "name": "identifier"
-          }
         },
         {
-          "type": "PREC",
-          "value": 3,
-          "content": {
           "type": "SYMBOL",
           "name": "operation"
-          }
+        },
+        {
+          "type": "SYMBOL",
+          "name": "control_flow"
         }
       ]
     },
@@ -242,6 +227,10 @@
         {
           "type": "STRING",
           "value": "="
+        },
+        {
+          "type": "STRING",
+          "value": "=="
         }
       ]
     },

src/node-types.json

@@ -248,6 +248,10 @@
     "type": "=",
     "named": false
   },
+  {
+    "type": "==",
+    "named": false
+  },
   {
     "type": "close",
     "named": true