Dump constant pool in debug mode

src/main.zig

@@ -52,6 +52,16 @@ pub fn main(init: std.process.Init) !void {
     };
     defer class.deinit();
 
+    if (@import("builtin").mode == .Debug) {
+        for (class.constant_pool, 1..) |cp_info, i| {
+            if (cp_info) |info| {
+                std.debug.print("#{d} = {s}\t{f}\n", .{ i, @tagName(info), info });
+            } else {
+                std.debug.print("#{d} = null\n", .{ i });
+            }
+        }
+    }
+
     try stdout.print("{f}", .{ class });
 
     try stdout.flush();