crystal_ruby.cr

macro ruby_class(name)
  _class = Ruby::Class.new({{name.id.stringify}})
  {{yield}}
end

macro ruby_def(name, &block)
  _class.def {{name}}, {{block.args.length}},
    ->(self : LibRuby::VALUE, {{*block.args.map { |arg| "#{arg} : LibRuby::VALUE".id } }}) do
      {{yield}}
    end
end

macro ruby_global_def(name, &block)
  Ruby.global_def {{name}}, 0,
    ->({{*block.args.map { |arg| "#{arg} : LibRuby::VALUE".id } }}) do
      {{yield}}
    end
end

ruby_class Foo do
  ruby_def "foo" do |a|
    a = Ruby::Value.new(a)
    "From Crystal!! #{a.to_s}".to_ruby
  end
end