2 files changed, 12 insertions(+), 10 deletions(-)

M META6.json
M bin/ryov

@@ 18,5 18,5 @@
   "scripts": {
     "test": "zef test ."
   },
-  "version": "2020.01.06.1"
+  "version": "2020.01.07"
 }=
\ No newline at end of file

@@ 29,20 29,22 @@ multi MAIN('bump', Bool :$breaking = False) {
 
 class X::Ryov::BadUpdate is Exception {
     method message() {
-        "Bad update, both transform and value provided";
+        "Bad update";
     }
 }
 
 sub update-meta6($path, $key, :$transform, :$value) {
     my %meta6 = $path.slurp.&from-json;
-    if $transform.defined and $value.defined {
-        X::Ryov::BadUpdate.new.throw;
-    }
-    if $transform.defined {
-        %meta6{$key} = $transform(%meta6{$key});
-    }
-    if $value.defined {
-        %meta6{$key} = $value;
+    given ($transform, $value)>>.defined {
+        when * eqv any((True, True), (False, False)) {
+            X::Ryov::BadUpdate.new.throw;
+        }
+        when * eqv (True, False) {
+            %meta6{$key} = $transform(%meta6{$key});
+        }
+        when * eqv (False, True) {
+            %meta6{$key} = $value;
+        }
     }
     $path.spurt: to-json %meta6, :sorted-keys;
     return %meta6{$key};