Class: Dry::Types::Constructor::Function Private

Inherits:
Object
  • Object
show all
Defined in:
lib/dry/types/constructor/function.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Function is used internally by Constructor types

Direct Known Subclasses

MethodCall, Safe, Wrapper

Defined Under Namespace

Classes: MethodCall, Safe, Wrapper

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fn) ⇒ Function

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Function.



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# File 'lib/dry/types/constructor/function.rb', line 173

def initialize(fn)
  @fn = fn
end

Instance Attribute Details

#fn ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/dry/types/constructor/function.rb', line 171

def fn
  @fn
end

Class Method Details

.[](fn) ⇒ Function

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Choose or build specialized invokation code for a callable

Parameters:

Returns:

Raises:

  • (::ArgumentError) 


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# File 'lib/dry/types/constructor/function.rb', line 141

def self.[](fn)
  raise ::ArgumentError, "Missing constructor block" if fn.nil?

  if fn.is_a?(Function)
    fn
  elsif fn.respond_to?(:arity) && fn.arity.equal?(2)
    Wrapper.new(fn)
  elsif fn.is_a?(::Method)
    MethodCall[fn, yields_block?(fn)]
  elsif yields_block?(fn)
    new(fn)
  else
    Safe.new(fn)
  end
end

.yields_block?(fn) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/dry/types/constructor/function.rb', line 158

def self.yields_block?(fn)
  *, (last_arg,) =
    if fn.respond_to?(:parameters)
      fn.parameters
    else
      fn.method(:call).parameters
    end

  last_arg.equal?(:block)
end

Instance Method Details

#<<(other) ⇒ Function

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:



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# File 'lib/dry/types/constructor/function.rb', line 208

def <<(other)
  f = Function[other]
  Function[-> x, &b { self.(f.(x, &b), &b) }]
end

#>>(other) ⇒ Function

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:



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# File 'lib/dry/types/constructor/function.rb', line 202

def >>(other)
  f = Function[other]
  Function[-> x, &b { f.(self.(x, &b), &b) }]
end

#arity ⇒ Integer

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Integer) 


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# File 'lib/dry/types/constructor/function.rb', line 184

def arity
  1
end

#call(input, &block) ⇒ Object Also known as: []

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Object) 


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# File 'lib/dry/types/constructor/function.rb', line 178

def call(input, &block)
  @fn.(input, &block)
end

#to_ast ⇒ Array

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:



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# File 'lib/dry/types/constructor/function.rb', line 193

def to_ast
  if fn.is_a?(::Proc)
    [:id, FnContainer.register(fn)]
  else
    [:callable, fn]
  end
end

#wrapper? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/dry/types/constructor/function.rb', line 188

def wrapper?
  arity.equal?(2)
end