Add compile time debugger

src/hence/assembler.cr

@@ -1,3 +1,5 @@
+require "colorize"
+
 module Hence
   module Assembler
     extend self
@@ -48,6 +50,21 @@ module Hence
     end
 
     MACROS = {
+      "debug" => ->(data : Data, args : Array(Parser::AST::Arg)) do
+        args.each do |arg|
+          arg_s = arg.to_s.gsub(/\n/, "\\n")
+
+          num = arg.resolve_as_number(data)
+          slice = arg.resolve(data)
+
+          puts arg_s.colorize(:green)
+          puts "  => #{"0x#{num.to_s(16).rjust(4, '0')}".colorize(:magenta)}"
+          puts "  => #{num.colorize(:magenta)}"
+          puts "  => [#{slice.map { |n| "0x#{n.to_s(16).rjust(2, '0')}".colorize(:magenta) }.join(", ")}]"
+          puts "  => #{"\"#{String.new(slice).gsub(/\n/, "\\n")}\"".colorize(:light_green)}"
+          puts
+        end
+      end,
       "org" => ->(data : Data, args : Array(Parser::AST::Arg)) do
         data.offset = args[0].resolve_as_number(data)
       end,