Module: Transproc

Defined in:
lib/transproc.rb,
lib/transproc/hash.rb,
lib/transproc/proc.rb,
lib/transproc/array.rb,
lib/transproc/class.rb,
lib/transproc/error.rb,
lib/transproc/store.rb,
lib/transproc/version.rb,
lib/transproc/composer.rb,
lib/transproc/function.rb,
lib/transproc/registry.rb,
lib/transproc/coercions.rb,
lib/transproc/composite.rb,
lib/transproc/functions.rb,
lib/transproc/recursion.rb,
lib/transproc/conditional.rb,
lib/transproc/transformer.rb,
lib/transproc/support/deprecations.rb,
lib/transproc/transformer/class_interface.rb

Defined Under Namespace

Modules: ArrayTransformations, ClassTransformations, Coercions, Composer, Conditional, Deprecations, Functions, HashTransformations, Helper, ProcTransformations, Recursion, Registry Classes: Composite, Function, FunctionNotFoundError, Store, Transformer

Constant Summary collapse

Undefined = 
Object.new.freeze
Error = 
Class.new(StandardError)
FunctionAlreadyRegisteredError = 
Class.new(Error)
VERSION = 
'0.4.2'.freeze

Class Method Summary collapse

Class Method Details

.[](name, *args) ⇒ Object

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.

Get registered function with provided name

Parameters:

  • name (Symbol) —

    The name of the registered function



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# File 'lib/transproc.rb', line 45

def self.[](name, *args)
  fn = functions.fetch(name) { raise(FunctionNotFoundError, name) }

  if args.any?
    fn.with(*args)
  else
    fn
  end
end

.functions ⇒ Object

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.

Function registry



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# File 'lib/transproc.rb', line 17

def self.functions
  @_functions ||= {}
end

.register(*args, &block) ⇒ Function

Register a new function

Examples:

Transproc.register(:to_json, -> v { v.to_json })

Transproc(:map_array, Transproc(:to_json))

Returns:



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# File 'lib/transproc.rb', line 32

def self.register(*args, &block)
  name, fn = *args
  if functions.include? name
    raise FunctionAlreadyRegisteredError, "Function #{name} is already defined"
  end
  functions[name] = fn || block
end