Class: Quincunx::Method::Application

Inherits:
Struct
  • Object
show all
Defined in:
lib/quincunx/method.rb

Instance Method Summary collapse

Instance Method Details

#args_match? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 35

def args_match?
  pairs.all? { |(a,b)| a.first === b }
end

#call ⇒ Object 



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# File 'lib/quincunx/method.rb', line 19

def call
  env.instance_exec(&body)
end

#contains_right_keys? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 39

def contains_right_keys?
  pairs.all? do |(a,b)|
    (a[1] || {}).fetch(:keys, []).all? { |k| b.respond_to? k }
  end
end

#correct_arg_count? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 31

def correct_arg_count?
  matchers.count == args.count
end

#env ⇒ Object 



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# File 'lib/quincunx/method.rb', line 27

def env
  @env ||= Environment.factory(obj, args, matchers)
end

#guard ⇒ Object 



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# File 'lib/quincunx/method.rb', line 53

def guard
  params.last.is_a?(Hash) ? params.last.fetch(:when) : ->{ true }
end

#is_guard?(param) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 57

def is_guard?(param)
  param.is_a?(Hash) && param.keys == [:when]
end

#matchers ⇒ Object 



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# File 'lib/quincunx/method.rb', line 61

def matchers
  @matchers ||= (is_guard?(params.last) ? params[0..-2] : params).map do |p|
    p.is_a?(Array) ? p : [p]
  end
end

#matches? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 23

def matches?
  correct_arg_count? && args_match? && contains_right_keys? && passes_guard?
end

#pairs ⇒ Object 



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# File 'lib/quincunx/method.rb', line 49

def pairs
  matchers.zip(args)
end

#passes_guard? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quincunx/method.rb', line 45

def passes_guard?
  env.instance_exec(&guard)
end