Execute function for assert

src/main.rs

@@ -1,10 +1,27 @@
 fn main() {
     let now = std::time::Instant::now();
 
-    use reactionsystems::rsprocess::presets;
-    match presets::run("testing/first.system".into()) {
-	Ok(_) => {},
-	Err(e) => {println!("{e}")}
+    // use reactionsystems::rsprocess::presets;
+    // match presets::run("testing/first.system".into()) {
+    //	Ok(_) => {},
+    //	Err(e) => {println!("{e}")}
+    // }
+
+    use reactionsystems::grammar::AssertParser;
+    use reactionsystems::rsprocess::translator::Translator;
+
+    let contents = r#"label { if (substr("e", ('e').tostr)) then {return 'e'} else {return (("e").toel)} }"#;
+    let mut translator = Translator::new();
+    let tree = AssertParser::new().parse(&mut translator, contents).unwrap();
+
+    println!("{tree}");
+    match tree.typecheck() {
+	Ok(_) => println!("ok"),
+	Err(e) => println!("error: {e}")
+    }
+    match tree.execute(&reactionsystems::rsprocess::structure::RSlabel::new(), &mut translator) {
+	Ok(val) => println!("ok: {val}"),
+	Err(e) => println!("error: {e}")
     }
 
     println!("{} milliseconds elapsed", now.elapsed().as_millis());