# If installed from gem
# require "rubygems"
# gem "patternmatching"
require "patternmatching"

# For DSL style code, include PatternMatching
include PatternMatching

# match example
def calc(code)
  make(code) {
    seems as {plus(:a, :b)} do calc(a) + calc(b) end
    seems as {mul(:a, :b)} do  calc(a) * calc(b) end
    seems something do code end
  }
end


code = build {plus(mul(100, 100), 200)}
p calc(code) #=> 10200