Options types

So for we used two different types for options: integers and booleans. But you can use more!

The supported types are:

• all subtypes of Int: Int32, UInt32, and all others
• all subtypes of Float: BigFloat, Float32 and Float64
• Bool
• String
• and all those types combined with Nil: Int32?, Float32?, Bool?, String?, and so on.

During the parsing, Clip tries to convert the string to the attribute's type. If any error happens, a Clip::ParsingError is raised (see the errors section for details).

require "clip"

module Myapplication
  VERSION = "0.1.0"

  struct Command
    include Clip::Mapper

    getter repeat = 1
    getter name : String
  end

  def self.run
    begin
      command = Command.parse
    rescue ex : Clip::Error
      puts ex
      return
    end

    if command.is_a?(Clip::Mapper::Help)
      puts command.help
    else
      hello(command.name, command.repeat)
    end
  end

  def self.hello(name, repeat)
    repeat.times { puts "Hello #{name}" }
  end
end

Myapplication.run

$ shards build
Dependencies are satisfied
Building: myapplication
$ ./bin/myapplication --repeat two Alice
Error:
  option's value is invalid: --repeat