vernacular

bash

$ bundle exec ruby exec.rb
== disasm: #<ISeq:<compiled>@src.rb>====================================
0000 trace            1                                               (   1)
0002 putself
0003 putobject        10
0005 putobject        2
0007 opt_plus         <callinfo!mid:+, argc:1, ARGS_SIMPLE>, <callcache>
0010 opt_send_without_block <callinfo!mid:puts, argc:1, FCALL|ARGS_SIMPLE>, <callcache>
0013 pop
0014 trace            1                                               (   2)
0016 putself
0017 putobject        12
0019 opt_send_without_block <callinfo!mid:puts, argc:1, FCALL|ARGS_SIMPLE>, <callcache>
0022 leave
--------------------
12
12

exec.rb

require 'pry'
require 'vernacular'

Vernacular.configure do |config|
  pattern = /~n\(([\d\s+-\/*\(\)]+?)\)/
  modifier =
    Vernacular::RegexModifier.new(pattern) do |match|
      eval(match[3..-2])
    end
  config.add(modifier)
end

result = RubyVM::InstructionSequence::load_iseq('src.rb')

puts result.disasm
puts '-' * 20
result.eval

src.rb

puts (10 + 2)
puts ~n(10 + 2)