require "patternmatching"


# For DSL style code, include PatternMatching
include PatternMatching

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


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