use conditional downcasting

onflow · Jan 24, 2024 · 5a1cf77 · 5a1cf77
1 parent 324e2e3
commit 5a1cf77
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Showing 2 changed files with 6 additions and 6 deletions.
diff --git a/contracts/utility/Burner.cdc b/contracts/utility/Burner.cdc
@@ -21,16 +21,16 @@ access(all) contract Burner {
     /// If the provided resource implements the Burnable interface,
     /// it will call the burnCallback method and then destroy afterwards.
     access(all) fun burn(_ r: @AnyResource) {
-        if let s <- r as @{Burnable} {
+        if let s <- r as? @{Burnable} {
             s.burnCallback()
             destroy s
-        } else if let arr <- r as @[AnyResource] {
+        } else if let arr <- r as? @[AnyResource] {
             while arr.length > 0 {
                 let item <- arr.removeFirst()
                 self.burn(<-item)
             }
             destroy arr
-        } else if let dict <- r as @{HashableStruct: AnyResource} {
+        } else if let dict <- r as? @{HashableStruct: AnyResource} {
             let keys = dict.keys
             while keys.length > 0 {
                 let item <- dict.remove(key: keys.removeFirst())!

diff --git a/lib/go/contracts/internal/assets/assets.go b/lib/go/contracts/internal/assets/assets.go