module Affect

# File lib/affect.rb, line 67
def block_and_handlers_from_args(*args, &block)
  case args.size
  when 1 then block ? [block, args.first] : [args.first, nil]
  when 2 then args
  else [block, nil]
  end
end

# File lib/affect.rb, line 61
def capture(*args, &block)
  block, handlers = block_and_handlers_from_args(*args, &block)
  handlers = { nil => handlers } if handlers.is_a?(Proc)
  Context.new(handlers).capture(&block)
end

# File lib/affect.rb, line 83
def escape(value = nil, &block)
  unless (ctx = Context.current)
    raise 'escape called outside capture block'
  end

  ctx.escape(value, &block)
end

# File lib/affect.rb, line 95
def method_missing(*args, &block)
  perform(*args, &block)
end

# File lib/affect.rb, line 75
def perform(effect, *args, &block)
  unless (ctx = Context.current)
    raise 'perform called outside capture block'
  end

  ctx.perform(effect, *args, &block)
end

# File lib/affect.rb, line 91
def respond_to_missing?(*)
  true
end