Yo I prob need an allocator

src/main.zig

@@ -56,10 +56,10 @@ pub fn rule1Test(input: []Symbol ) bool{
 }
 pub fn rule1(input: []Symbol) []Symbol{
     const lastEl:Symbol = input[input.len];
-
+    const u: [1]Symbol = .{Symbol.U};
+    
     if(lastEl == Symbol.I){
-        
+        return input ++ u;
-        return input ++ &Symbol.U;
     }
 }
 
@@ -72,10 +72,12 @@ pub fn rule2(input: []Symbol) []Symbol{
 }
 
 pub fn rule3Test(input: []Symbol) bool {
+    const pattern: [3]Symbol = .{Symbol.I, Symbol.I, Symbol.I};
+
     for(input)|symbol, i|{
         if(symbol == Symbol.I){
             var streak = input[i..i+2];
-            if(mem.eql(u2, streak, [_]Symbol{Symbol.I ** 3}) ){
+            if(mem.eql(Symbol, streak, &pattern) ){
                 return true;
             } 
         }
@@ -84,13 +86,15 @@ pub fn rule3Test(input: []Symbol) bool {
 }
 pub fn rule3(input: []Symbol) []Symbol{
     // III => U
+    const pattern: [3]Symbol = .{Symbol.I, Symbol.I, Symbol.I};
+    const u: [1]Symbol = .{Symbol.U}; 
 
     //var i:u64 = 0;
     for(input)|symbol, i|{
         if(symbol == Symbol.I){
             var streak = input[i..i+2];
-            if(mem.eql(u2, streak, []Symbol{Symbol.I ** 3})){
+            if(mem.eql(Symbol, streak, &pattern)){
-                return input[0..i] ++ Symbol.U ++ input[i+2..];
+                return input[0..i] ++ u ++ input[i+2..];
             }
         }
     }
@@ -98,21 +102,24 @@ pub fn rule3(input: []Symbol) []Symbol{
 }
 
 pub fn rule4Test(input: []Symbol) bool {
+    const pattern: [2]Symbol = .{Symbol.U, Symbol.U};
+
     for(input)|symbol, i|{
         if(symbol == Symbol.U){
-            var streak = input[i..i+2];
+            var streak = input[i..i+1];
-            return (mem.eql(u2, streak, []Symbol{Symbol.U ** 3}));
+            return (mem.eql(Symbol, streak, &pattern));
         }
     }
     return false;
 }
 pub fn rule4(input: []Symbol) []Symbol{
     // UU => -
+    const pattern: [2]Symbol = .{Symbol.U, Symbol.U};
 
     for(input)|symbol, i|{
         if(symbol == Symbol.U){
             var streak = input[i..i+2];
-            if(mem.eql(u2, streak, []Symbol{Symbol.U ** 3})){
+            if(mem.eql(Symbol, streak, &pattern)){
                 return input[0..i] ++ input[i+1..];
             }
         }
@@ -120,7 +127,9 @@ pub fn rule4(input: []Symbol) []Symbol{
 }
 
 pub fn finish(input: []Symbol) bool{
-    return mem.eql(u2, input, []Symbol{Symbol.M, Symbol.U});
+    const pattern: [2]Symbol = .{Symbol.M, Symbol.U};
+
+    return mem.eql(Symbol, input, &pattern);
 }