1 files changed, 30 insertions, 12 deletions
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