Add float support; Write tests

bindings/dust

@@ -1 +1 @@
-Subproject commit c9c7eb31737fc3ce02bed5ce0069d8e04345f00b
+Subproject commit 3182e7c860ac74d1d4e2846152eef45c4111bd63

grammar.js

@@ -21,10 +21,10 @@ module.exports = grammar({
     open_statement: $ => prec.left(seq($.expression)),
 
     expression: $ => choice(
-      prec(0, $.value),
-      prec(1, $.identifier),
-      prec(2, $.operation),
-      prec(3, $.control_flow),
+      prec(0, $.control_flow),
+      prec(1, $.value),
+      prec(2, $.identifier),
+      prec(3, $.operation),
     ),
 
     close: $ => ";",

src/grammar.json

@@ -88,7 +88,7 @@
           "value": 0,
           "content": {
             "type": "SYMBOL",
-            "name": "value"
+            "name": "control_flow"
           }
         },
         {
@@ -96,7 +96,7 @@
           "value": 1,
           "content": {
             "type": "SYMBOL",
-            "name": "identifier"
+            "name": "value"
           }
         },
         {
@@ -104,7 +104,7 @@
           "value": 2,
           "content": {
             "type": "SYMBOL",
-            "name": "operation"
+            "name": "identifier"
           }
         },
         {
@@ -112,7 +112,7 @@
           "value": 3,
           "content": {
             "type": "SYMBOL",
-            "name": "control_flow"
+            "name": "operation"
           }
         }
       ]