Module: OpenNamespace

Defined in:
lib/open_namespace/version.rb,
lib/open_namespace/class_methods.rb,
lib/open_namespace/open_namespace.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

VERSION =

open_namespace version

'0.4.2'

Class Method Summary collapse

Class Method Details

.const_lookup(scope, name) ⇒ Object?

Finds the exact constant.

Parameters:

  • scope (Module, Class) —

    The scope to begin searching within.

  • name (String) —

    The name of the constant.

Returns:

  • (Object, nil) —

    The exact constant or nil if the constant could not be found.

Since:

  • 0.4.0



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# File 'lib/open_namespace/open_namespace.rb', line 55

def self.const_lookup(scope,name)
  names = name.split('::')

  until names.empty?
    begin
      scope = scope.const_get(names.shift)
    rescue NameError
      return nil
    end
  end

  return scope
end

.const_path(name) ⇒ String

Maps a constant name to a likely file path.

Parameters:

  • name (String, Symbol) —

    The constant name.

Returns:

  • (String) —

    The file path that the constant is likely to be defined within.

Since:

  • 0.3.0



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# File 'lib/open_namespace/open_namespace.rb', line 23

def self.const_path(name)
  path = name.to_s.dup

  # back-ported from extlib's String#to_const_path
  path.gsub!(/::/,'/')

  # back-ported from extlib's String#snake_case
  unless path.match(/\A[A-Z]+\z/)
    path.gsub!(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
    path.gsub!(/([a-z])([A-Z])/, '\1_\2')
  end

  path.downcase!
  return path
end

.const_search(scope, file_name) ⇒ Object?

Finds the constant with a name similar to the given file name.

Parameters:

  • scope (Module, Class) —

    The scope to begin searching within.

  • file_name (Symbol, String) —

    The file name that represents the constant.

Returns:

  • (Object, nil) —

    Returns the found constants, or nil if a NameError exception was encountered.

Since:

  • 0.4.0



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# File 'lib/open_namespace/open_namespace.rb', line 86

def self.const_search(scope,file_name)
  names = file_name.to_s.split(/[:\/]+/)

  until names.empty?
    name = names.shift

    # strip any dashes or underscores
    name.tr!('_-','')

    # perform a case insensitive search
    const_pattern = /^#{name}$/i

    # grep for the constant
    const_name = scope.constants.find { |name| name =~ const_pattern }

    # the constant search failed
    return nil unless const_name

    scope = scope.const_get(const_name)
  end

  return scope
end

.included(base) ⇒ Object 



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# File 'lib/open_namespace/open_namespace.rb', line 6

def self.included(base)
  base.extend ClassMethods
end