An embeddable Ruby-like language for safe, AI-friendly apps in Go.

def shipping_quote(speed: ShippingSpeed, subtotal: money) -> hash
  fee = shipping_fee(speed, subtotal)
  transit = transit_time(speed)

  {
    speed: speed.name,
    fee: fee,
    total: subtotal + fee,
    transit: transit.iso8601
  }
end

enum AccountStanding
  Current
  Grace
  Delinquent
end

def standing_for(overdue: duration) -> AccountStanding
  if overdue <= 3.days
    AccountStanding::Current
  elsif overdue <= 15.days
    AccountStanding::Grace
  else
    AccountStanding::Delinquent
  end
end

def transit_time(speed: ShippingSpeed) -> duration
  if speed == ShippingSpeed::Economy
    5.days
  elsif speed == ShippingSpeed::Priority
    2.days
  else
    6.hours
  end
end

def net_after_fee(cents)
  gross = money_cents(cents, "USD")
  fee = money("1.75 USD")
  gross - fee
end

def benchmark
  start = Time.now
  result = yield
  elapsed = Time.now - start
  { result: result, elapsed: elapsed }
end

def transform_keys(hash)
  result = {}
  hash.keys.each do |key|
    new_key = yield(key)
    result[new_key] = hash[key]
  end
  result
end