remove early return when there is no change in simp

src/main.rs

@@ -3,7 +3,6 @@ use std::{
     collections::{HashMap, HashSet},
     env,
     io::{self, Read},
-    iter,
     sync::Mutex,
 };
 
@@ -598,14 +597,7 @@ fn rw(rule: &Rule, sexp: &Sexp) -> Sexp {
     }
 }
 
-fn simp(
-    rules: &[Rule],
-    mut expr: Sexp,
-    step_limit: usize,
-    complexity_limit: usize,
-) -> (Sexp, usize) {
-    let mut max = 0;
-    let mut grace = step_limit / 4;
+fn simp(rules: &[Rule], mut expr: Sexp, step_limit: usize, complexity_limit: usize) -> Sexp {
     for i in 0..step_limit {
         expr = expr
             .apply_special_form::<Genslop>()
@@ -619,24 +611,12 @@ fn simp(
             break;
         }
 
-        let last = expr.clone();
-
         for rule in rules {
             expr = rw(rule, &expr);
         }
-
-        if expr == last {
-            grace -= 1;
     }
 
-        if grace == 0 {
-            break;
-        }
-
-        max = i;
-    }
-
-    (expr, max)
+    expr
 }
 
 trait SpecialForm<'src>: Sized {
@@ -796,10 +776,9 @@ fn run_program(src: &str, step_limit: usize, complexity_limit: usize) -> Option<
     }
     //eprintln!("{:<50}\n{:<50}\n{:^50}", "|", "▾", expr.to_string());
 
-    let (simped, steps) = simp(&rules, expr, step_limit, complexity_limit);
+    let simped = simp(&rules, expr, step_limit, complexity_limit);
     eprintln!("\x1b[0m");
     eprintln!("Complexity: {}", simped.complexity());
-    eprintln!("Steps:      {}", steps + 1);
     Some(simped)
 }