diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/module')
7 files changed, 215 insertions, 33 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/anonymous.rb b/activesupport/lib/active_support/core_ext/module/anonymous.rb index 0ecc67a855..510c9a5430 100644 --- a/activesupport/lib/active_support/core_ext/module/anonymous.rb +++ b/activesupport/lib/active_support/core_ext/module/anonymous.rb @@ -7,7 +7,7 @@ class Module # m = Module.new # m.name # => nil # - # +anonymous?+ method returns true if module does not have a name: + # +anonymous?+ method returns true if module does not have a name, false otherwise: # # Module.new.anonymous? # => true # @@ -18,8 +18,10 @@ class Module # via the +module+ or +class+ keyword or by an explicit assignment: # # m = Module.new # creates an anonymous module - # M = m # => m gets a name here as a side-effect + # m.anonymous? # => true + # M = m # m gets a name here as a side-effect # m.name # => "M" + # m.anonymous? # => false def anonymous? name.nil? end diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb index d4e6b5a1ac..76825862d7 100644 --- a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb +++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb @@ -5,7 +5,7 @@ require 'active_support/core_ext/array/extract_options' # attributes. class Module # Defines a class attribute and creates a class and instance reader methods. - # The underlying the class variable is set to +nil+, if it is not previously + # The underlying class variable is set to +nil+, if it is not previously # defined. # # module HairColors @@ -19,9 +19,9 @@ class Module # The attribute name must be a valid method name in Ruby. # # module Foo - # mattr_reader :"1_Badname " + # mattr_reader :"1_Badname" # end - # # => NameError: invalid attribute name + # # => NameError: invalid attribute name: 1_Badname # # If you want to opt out the creation on the instance reader method, pass # <tt>instance_reader: false</tt> or <tt>instance_accessor: false</tt>. @@ -49,11 +49,11 @@ class Module # include HairColors # end # - # Person.hair_colors # => [:brown, :black, :blonde, :red] + # Person.new.hair_colors # => [:brown, :black, :blonde, :red] def mattr_reader(*syms) options = syms.extract_options! syms.each do |sym| - raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /^[_A-Za-z]\w*$/ + raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /\A[_A-Za-z]\w*\z/ class_eval(<<-EOS, __FILE__, __LINE__ + 1) @@#{sym} = nil unless defined? @@#{sym} @@ -105,7 +105,7 @@ class Module # # Also, you can pass a block to set up the attribute with a default value. # - # class HairColors + # module HairColors # mattr_writer :hair_colors do # [:brown, :black, :blonde, :red] # end @@ -119,7 +119,7 @@ class Module def mattr_writer(*syms) options = syms.extract_options! syms.each do |sym| - raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /^[_A-Za-z]\w*$/ + raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /\A[_A-Za-z]\w*\z/ class_eval(<<-EOS, __FILE__, __LINE__ + 1) @@#{sym} = nil unless defined? @@#{sym} @@ -150,8 +150,8 @@ class Module # include HairColors # end # - # Person.hair_colors = [:brown, :black, :blonde, :red] - # Person.hair_colors # => [:brown, :black, :blonde, :red] + # HairColors.hair_colors = [:brown, :black, :blonde, :red] + # HairColors.hair_colors # => [:brown, :black, :blonde, :red] # Person.new.hair_colors # => [:brown, :black, :blonde, :red] # # If a subclass changes the value then that would also change the value for @@ -161,8 +161,8 @@ class Module # class Male < Person # end # - # Male.hair_colors << :blue - # Person.hair_colors # => [:brown, :black, :blonde, :red, :blue] + # Male.new.hair_colors << :blue + # Person.new.hair_colors # => [:brown, :black, :blonde, :red, :blue] # # To opt out of the instance writer method, pass <tt>instance_writer: false</tt>. # To opt out of the instance reader method, pass <tt>instance_reader: false</tt>. @@ -206,7 +206,7 @@ class Module # Person.class_variable_get("@@hair_colors") # => [:brown, :black, :blonde, :red] def mattr_accessor(*syms, &blk) mattr_reader(*syms, &blk) - mattr_writer(*syms, &blk) + mattr_writer(*syms) end alias :cattr_accessor :mattr_accessor end diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb new file mode 100644 index 0000000000..8a7e6776da --- /dev/null +++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb @@ -0,0 +1,141 @@ +require 'active_support/core_ext/array/extract_options' + +# Extends the module object with class/module and instance accessors for +# class/module attributes, just like the native attr* accessors for instance +# attributes, but does so on a per-thread basis. +# +# So the values are scoped within the Thread.current space under the class name +# of the module. +class Module + # Defines a per-thread class attribute and creates class and instance reader methods. + # The underlying per-thread class variable is set to +nil+, if it is not previously defined. + # + # module Current + # thread_mattr_reader :user + # end + # + # Current.user # => nil + # Thread.current[:attr_Current_user] = "DHH" + # Current.user # => "DHH" + # + # The attribute name must be a valid method name in Ruby. + # + # module Foo + # thread_mattr_reader :"1_Badname" + # end + # # => NameError: invalid attribute name: 1_Badname + # + # If you want to opt out the creation on the instance reader method, pass + # <tt>instance_reader: false</tt> or <tt>instance_accessor: false</tt>. + # + # class Current + # thread_mattr_reader :user, instance_reader: false + # end + # + # Current.new.user # => NoMethodError + def thread_mattr_reader(*syms) + options = syms.extract_options! + + syms.each do |sym| + raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /^[_A-Za-z]\w*$/ + class_eval(<<-EOS, __FILE__, __LINE__ + 1) + def self.#{sym} + Thread.current[:"attr_#{name}_#{sym}"] + end + EOS + + unless options[:instance_reader] == false || options[:instance_accessor] == false + class_eval(<<-EOS, __FILE__, __LINE__ + 1) + def #{sym} + Thread.current[:"attr_#{self.class.name}_#{sym}"] + end + EOS + end + end + end + alias :thread_cattr_reader :thread_mattr_reader + + # Defines a per-thread class attribute and creates a class and instance writer methods to + # allow assignment to the attribute. + # + # module Current + # thread_mattr_writer :user + # end + # + # Current.user = "DHH" + # Thread.current[:attr_Current_user] # => "DHH" + # + # If you want to opt out the instance writer method, pass + # <tt>instance_writer: false</tt> or <tt>instance_accessor: false</tt>. + # + # class Current + # thread_mattr_writer :user, instance_writer: false + # end + # + # Current.new.user = "DHH" # => NoMethodError + def thread_mattr_writer(*syms) + options = syms.extract_options! + syms.each do |sym| + raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /^[_A-Za-z]\w*$/ + class_eval(<<-EOS, __FILE__, __LINE__ + 1) + def self.#{sym}=(obj) + Thread.current[:"attr_#{name}_#{sym}"] = obj + end + EOS + + unless options[:instance_writer] == false || options[:instance_accessor] == false + class_eval(<<-EOS, __FILE__, __LINE__ + 1) + def #{sym}=(obj) + Thread.current[:"attr_#{self.class.name}_#{sym}"] = obj + end + EOS + end + end + end + alias :thread_cattr_writer :thread_mattr_writer + + # Defines both class and instance accessors for class attributes. + # + # class Account + # thread_mattr_accessor :user + # end + # + # Account.user = "DHH" + # Account.user # => "DHH" + # Account.new.user # => "DHH" + # + # If a subclass changes the value, the parent class' value is not changed. + # Similarly, if the parent class changes the value, the value of subclasses + # is not changed. + # + # class Customer < Account + # end + # + # Customer.user = "Rafael" + # Customer.user # => "Rafael" + # Account.user # => "DHH" + # + # To opt out of the instance writer method, pass <tt>instance_writer: false</tt>. + # To opt out of the instance reader method, pass <tt>instance_reader: false</tt>. + # + # class Current + # thread_mattr_accessor :user, instance_writer: false, instance_reader: false + # end + # + # Current.new.user = "DHH" # => NoMethodError + # Current.new.user # => NoMethodError + # + # Or pass <tt>instance_accessor: false</tt>, to opt out both instance methods. + # + # class Current + # mattr_accessor :user, instance_accessor: false + # end + # + # Current.new.user = "DHH" # => NoMethodError + # Current.new.user # => NoMethodError + def thread_mattr_accessor(*syms, &blk) + thread_mattr_reader(*syms, &blk) + thread_mattr_writer(*syms, &blk) + end + alias :thread_cattr_accessor :thread_mattr_accessor +end diff --git a/activesupport/lib/active_support/core_ext/module/concerning.rb b/activesupport/lib/active_support/core_ext/module/concerning.rb index e26b594fc4..65b88b9bbd 100644 --- a/activesupport/lib/active_support/core_ext/module/concerning.rb +++ b/activesupport/lib/active_support/core_ext/module/concerning.rb @@ -99,7 +99,7 @@ class Module # end # # Todo.ancestors - # # => Todo, Todo::EventTracking, Object + # # => [Todo, Todo::EventTracking, Object] # # This small step has some wonderful ripple effects. We can # * grok the behavior of our class in one glance, diff --git a/activesupport/lib/active_support/core_ext/module/delegation.rb b/activesupport/lib/active_support/core_ext/module/delegation.rb index 9b7a429db9..0d46248582 100644 --- a/activesupport/lib/active_support/core_ext/module/delegation.rb +++ b/activesupport/lib/active_support/core_ext/module/delegation.rb @@ -5,10 +5,11 @@ class Module # option is not used. class DelegationError < NoMethodError; end - RUBY_RESERVED_WORDS = Set.new( - %w(alias and BEGIN begin break case class def defined? do else elsif END - end ensure false for if in module next nil not or redo rescue retry - return self super then true undef unless until when while yield) + DELEGATION_RESERVED_METHOD_NAMES = Set.new( + %w(_ arg args alias and BEGIN begin block break case class def defined? do + else elsif END end ensure false for if in module next nil not or redo + rescue retry return self super then true undef unless until when while + yield) ).freeze # Provides a +delegate+ class method to easily expose contained objects' @@ -167,11 +168,11 @@ class Module '' end - file, line = caller(1, 1).first.split(':', 2) + file, line = caller(1, 1).first.split(':'.freeze, 2) line = line.to_i to = to.to_s - to = "self.#{to}" if RUBY_RESERVED_WORDS.include?(to) + to = "self.#{to}" if DELEGATION_RESERVED_METHOD_NAMES.include?(to) methods.each do |method| # Attribute writer methods only accept one argument. Makes sure []= diff --git a/activesupport/lib/active_support/core_ext/module/qualified_const.rb b/activesupport/lib/active_support/core_ext/module/qualified_const.rb index 65525013db..3ea39d4267 100644 --- a/activesupport/lib/active_support/core_ext/module/qualified_const.rb +++ b/activesupport/lib/active_support/core_ext/module/qualified_const.rb @@ -3,13 +3,16 @@ require 'active_support/core_ext/string/inflections' #-- # Allows code reuse in the methods below without polluting Module. #++ -module QualifiedConstUtils - def self.raise_if_absolute(path) - raise NameError.new("wrong constant name #$&") if path =~ /\A::[^:]+/ - end - def self.names(path) - path.split('::') +module ActiveSupport + module QualifiedConstUtils + def self.raise_if_absolute(path) + raise NameError.new("wrong constant name #$&") if path =~ /\A::[^:]+/ + end + + def self.names(path) + path.split('::') + end end end @@ -24,9 +27,14 @@ end #++ class Module def qualified_const_defined?(path, search_parents=true) - QualifiedConstUtils.raise_if_absolute(path) + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + Module#qualified_const_defined? is deprecated in favour of the builtin + Module#const_defined? and will be removed in Rails 5.1. + MESSAGE - QualifiedConstUtils.names(path).inject(self) do |mod, name| + ActiveSupport::QualifiedConstUtils.raise_if_absolute(path) + + ActiveSupport::QualifiedConstUtils.names(path).inject(self) do |mod, name| return unless mod.const_defined?(name, search_parents) mod.const_get(name) end @@ -34,19 +42,29 @@ class Module end def qualified_const_get(path) - QualifiedConstUtils.raise_if_absolute(path) + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + Module#qualified_const_get is deprecated in favour of the builtin + Module#const_get and will be removed in Rails 5.1. + MESSAGE + + ActiveSupport::QualifiedConstUtils.raise_if_absolute(path) - QualifiedConstUtils.names(path).inject(self) do |mod, name| + ActiveSupport::QualifiedConstUtils.names(path).inject(self) do |mod, name| mod.const_get(name) end end def qualified_const_set(path, value) - QualifiedConstUtils.raise_if_absolute(path) + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + Module#qualified_const_set is deprecated in favour of the builtin + Module#const_set and will be removed in Rails 5.1. + MESSAGE + + ActiveSupport::QualifiedConstUtils.raise_if_absolute(path) const_name = path.demodulize mod_name = path.deconstantize - mod = mod_name.empty? ? self : qualified_const_get(mod_name) + mod = mod_name.empty? ? self : const_get(mod_name) mod.const_set(const_name, value) end end diff --git a/activesupport/lib/active_support/core_ext/module/remove_method.rb b/activesupport/lib/active_support/core_ext/module/remove_method.rb index 52632d2c6b..d5ec16d68a 100644 --- a/activesupport/lib/active_support/core_ext/module/remove_method.rb +++ b/activesupport/lib/active_support/core_ext/module/remove_method.rb @@ -6,10 +6,30 @@ class Module end end + # Removes the named singleton method, if it exists. + def remove_possible_singleton_method(method) + singleton_class.instance_eval do + remove_possible_method(method) + end + end + # Replaces the existing method definition, if there is one, with the passed # block as its body. def redefine_method(method, &block) + visibility = method_visibility(method) remove_possible_method(method) define_method(method, &block) + send(visibility, method) + end + + def method_visibility(method) # :nodoc: + case + when private_method_defined?(method) + :private + when protected_method_defined?(method) + :protected + else + :public + end end end |