Barely working ansi color codes parser but I _really_ don't like this one. Too much code to just get it to process correctly which means it'll be brittle as hell later.

scratchpad/testragel.rl

@@ -15,30 +15,54 @@ using namespace fmt;
   }
 
   action number {
-    size_t value = 0;
     auto [ptr, ec] = std::from_chars(start, fpc, value);
     dbc::check(ec == std::errc(), "error in number parsing");
     println("NUMBER {}", value);
   }
 
+  action color256 {
+   println("256 color");
+  }
+
+  action color24b {
+    println("true color");
+  }
+
+  action colorSingle {
+    println("single color");
+  }
+
+  action colorBasic {
+    println("basic color");
+  }
+
+  action bg {
+    println("BG");
+  }
+
+  action fg {
+    println("FG");
+  }
+
   start = 0x1B "[";
-  fg = "38;";
-  bg = "48;";
+  fg = "38;" %fg;
+  bg = "48;" %bg;
   num = digit+ >tstart %number;
   color256 = "5;" num ";" num;
   color24b = "2;" num ";" num ";" num;
   basic = num ";" num;
   single = num;
 
-  main := |*
-      start => { println("START"); };
-      fg color256 "m" => { println("fg 256 color"); };
-      bg color256 "m" => { println("bg 256 color"); };
-      fg color24b "m" => { println("fg true color"); };
-      bg color24b "m" => { println("bg true color"); };
-      single "m" => { println("single"); };
-      basic "m" => { println("basic"); };
-    *|;
+  main := (
+      start %{ println("START"); }
+      (
+        (fg|bg) color256 %color256 |
+        (fg|bg) color24b %color24b |
+        single %colorSingle |
+        basic %colorBasic
+      )**
+      "m" %{ println("END"); }
+    )**;
 }%%
 
 %% write data;
@@ -46,11 +70,9 @@ using namespace fmt;
 void parse_ansi(std::string_view &codes) {
   const char *start = NULL;
   int cs = 0;
-  size_t act = 0;
+  size_t value = 0;
   const char *p = codes.data();
   const char *pe = p + codes.size();
-  const char *ts = p;
-  const char *te = pe;
   const char *eof = pe;
 
   %% write init;