```rust use semilattice_script::*;
let dir="./ss-test/"; if std::path::Path::new(dir).exists(){ std::fs::removedirall(dir).unwrap(); std::fs::createdirall(dir).unwrap(); }else{ std::fs::createdirall(dir).unwrap(); }
let mut ss=SemilatticeScript::new(dir).unwrap();
let mut ss=SemilatticeScript::new(dir).unwrap();
ss.exec(r#"
let r=ss.exec(&(r#"
```