Allow interpreting code extension property

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/builtins/IrBuiltInsMapGenerated.kt

@@ -197,6 +197,9 @@ internal fun interpretUnaryFunction(name: String, type: String, a: Any?): Any? {
         "CHECK_NOT_NULL" -> when (type) {
             "T0?" -> return a!!
         }
+        "code" -> when (type) {
+            "Char" -> return (a as Char).code
+        }
     }
     throw InterpreterMethodNotFoundError("Unknown function: $name($type)")
 }

generators/interpreter/GenerateInterpreterMap.kt

@@ -55,6 +55,7 @@ fun generateMap(): String {
         val irNullCheck = irBuiltIns.checkNotNullSymbol.owner
         this += Operation(irNullCheck.name.asString(), listOf("T0?"), customExpression = "a!!")
         this += Operation("toString", listOf("Any?"), customExpression = "a?.toString() ?: \"null\"")
+        this += Operation("code", listOf("Char"), customExpression = "(a as Char).code")
         // TODO next operation can be dropped after serialization introduction
         this += Operation("toString", listOf("Unit"), customExpression = "Unit.toString()")
     })