Extract ActiveSupport::TypedArray class to ensure an array is all of the same type [#673 state:resolved]

2 files changed, 32 insertions, 0 deletions

diff --git a/activesupport/lib/active_support.rb b/activesupport/lib/active_support.rb
index 1df911a3f2..51067e910e 100644
--- a/activesupport/lib/active_support.rb
+++ b/activesupport/lib/active_support.rb
@@ -39,6 +39,7 @@ require 'active_support/cache'
 require 'active_support/dependencies'
 require 'active_support/deprecation'
 
+require 'active_support/typed_array'
 require 'active_support/ordered_hash'
 require 'active_support/ordered_options'
 require 'active_support/option_merger'
diff --git a/activesupport/lib/active_support/typed_array.rb b/activesupport/lib/active_support/typed_array.rb
new file mode 100644
index 0000000000..1a4d8a8faf
--- /dev/null
+++ b/activesupport/lib/active_support/typed_array.rb
@@ -0,0 +1,31 @@
+module ActiveSupport
+  class TypedArray < Array
+    def self.type_cast(obj)
+      obj
+    end
+
+    def initialize(*args)
+      super(*args).map! { |obj| self.class.type_cast(obj) }
+    end
+
+    def <<(obj)
+      super(self.class.type_cast(obj))
+    end
+
+    def concat(array)
+      super(array.map! { |obj| self.class.type_cast(obj) })
+    end
+
+    def insert(index, obj)
+      super(index, self.class.type_cast(obj))
+    end
+
+    def push(*objs)
+      super(*objs.map { |obj| self.class.type_cast(obj) })
+    end
+
+    def unshift(*objs)
+      super(*objs.map { |obj| self.class.type_cast(obj) })
+    end
+  end
+end