1 files changed, 28 insertions, 6 deletions
diff --git a/ext/json/lib/json/add/struct.rb b/ext/json/lib/json/add/struct.rb
index e8395ed42f..86847762ac 100644
--- a/ext/json/lib/json/add/struct.rb
+++ b/ext/json/lib/json/add/struct.rb
@@ -5,14 +5,28 @@ end
 
 class Struct
 
-  # Deserializes JSON string by constructing new Struct object with values
-  # <tt>v</tt> serialized by <tt>to_json</tt>.
+  # See #as_json.
   def self.json_create(object)
     new(*object['v'])
   end
 
-  # Returns a hash, that will be turned into a JSON object and represent this
-  # object.
+  # Methods <tt>Struct#as_json</tt> and +Struct.json_create+ may be used
+  # to serialize and deserialize a \Struct object;
+  # see Marshal[rdoc-ref:Marshal].
+  #
+  # \Method <tt>Struct#as_json</tt> serializes +self+,
+  # returning a 2-element hash representing +self+:
+  #
+  #   require 'json/add/struct'
+  #   Customer = Struct.new('Customer', :name, :address, :zip)
+  #   x = Struct::Customer.new.as_json
+  #   # => {"json_class"=>"Struct::Customer", "v"=>[nil, nil, nil]}
+  #
+  # \Method +JSON.create+ deserializes such a hash, returning a \Struct object:
+  #
+  #   Struct::Customer.json_create(x)
+  #   # => #<struct Struct::Customer name=nil, address=nil, zip=nil>
+  #
   def as_json(*)
     klass = self.class.name
     klass.to_s.empty? and raise JSON::JSONError, "Only named structs are supported!"
@@ -22,8 +36,16 @@ class Struct
     }
   end
 
-  # Stores class name (Struct) with Struct values <tt>v</tt> as a JSON string.
-  # Only named structs are supported.
+  # Returns a JSON string representing +self+:
+  #
+  #   require 'json/add/struct'
+  #   Customer = Struct.new('Customer', :name, :address, :zip)
+  #   puts Struct::Customer.new.to_json
+  #
+  # Output:
+  #
+  #   {"json_class":"Struct","t":{'name':'Rowdy',"age":null}}
+  #
   def to_json(*args)
     as_json.to_json(*args)
   end