Module: Octiron::Support::Constantize

Included in:
Identifiers
Defined in:
lib/octiron/support/constantize.rb

Overview

See Also:

  • Constantize::constantize

Instance Method Summary collapse

Instance Method Details

#constantize(constant_name) ⇒ Object

Takes a String containing a constant name, and returns the canonical path of the constant (i.e. where it’s defined, even if it’s accessed differently.). If the constant does not exist, a NameError is thrown.

Parameters:

  • constant_name (String) —

    the constant name

Returns:

  • (Object) —

    the actual named constant.



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# File 'lib/octiron/support/constantize.rb', line 21

def constantize(constant_name)
  names = constant_name.split('::')

  # Trigger a built-in NameError exception including the ill-formed
  # constant in the message.
  if names.empty?
    Object.const_get(constant_name, false)
  end

  # Remove the first blank element in case of '::ClassName' notation.
  if names.size > 1 && names.first.empty?
    names.shift
  end

  # Note: this would be much more complex in Ruby < 1.9.3, so yay for not
  # bothering to support these!
  return names.inject(Object) do |constant, name|
    next constant.const_get(name)
  end
end