fix order of literal hex validation rules (#2791)

It's more user friendly to complain about the underscores first
vyperlang · Apr 14, 2022 · 539764c · 539764c
1 parent c4c6afd
commit 539764c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/vyper/ast/nodes.py b/vyper/ast/nodes.py
@@ -772,10 +772,10 @@ class Hex(Constant):
     _translated_fields = {"n": "value"}
 
     def validate(self):
-        if len(self.value) % 2:
-            raise InvalidLiteral("Hex notation requires an even number of digits", self)
         if "_" in self.value:
             raise InvalidLiteral("Underscores not allowed in hex literals", self)
+        if len(self.value) % 2:
+            raise InvalidLiteral("Hex notation requires an even number of digits", self)
 
 
 class Str(Constant):