show toast if there's no code to run

Author: steveRoll-git

src/context/SimulationContext.tsx

@@ -156,6 +156,14 @@ export function SimulationContextProvider({ children }: Props) {
         position: "bottom-left",
       })
     } else if (r.kind == "result") {
+      if (r.data.length == 0) {
+        toast.info("No code to run!", {
+          description: "Write some code, and then start the simulation.",
+          position: "bottom-left",
+        })
+        return
+      }
+
       setError(undefined)
       setPrevPc(undefined)
 

src/lib/assembler.ts

@@ -329,7 +329,7 @@ export function assemble(
     code,
     index: 0,
     line: 1,
-    reachedEnd: false,
+    reachedEnd: code.length == 0,
   }
 
   const data: number[] = []