remove ui

Author: rhysdh540

.github/workflows/pages.yml

@@ -41,6 +41,7 @@ jobs:
           mkdir -p site
           cp -R build/processedResources/wasmJs/main/* site/
           cp -R build/compileSync/wasmJs/main/productionExecutable/optimized/* site/
+          rm -f site/index.html
           touch site/.nojekyll
 
       - name: Configure Pages

src/commonMain/kotlin/dev/rdh/bf/symbols.kt

@@ -74,4 +74,8 @@ data class SetToConstant(val value: UByte = 0u, val offset: Int = 0) : BFOperati
  *
  * This operation does not modify the current cell.
  */
-data class Copy(val multiplier: Int, val offset: Int) : BFOperation
+data class Copy(val multiplier: Int, val offset: Int) : BFOperation {
+    init {
+        require(offset != 0) { "Cannot copy to the current cell (offset 0)" }
+    }
+}