From d98acaecd9391e21e2fe1a0771ab8b93b3b4bdf1 Mon Sep 17 00:00:00 2001
From: Florian Frank <flori@ping.de>
Date: Thu, 25 Aug 2011 08:52:47 +0200
Subject: Add (de-)serialisation methods f. Complex/Rational

---
 lib/json/add/core.rb        | 42 ++++++++++++++++++++++++++++++++++++++++--
 tests/test_json_addition.rb |  5 +++++
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/lib/json/add/core.rb b/lib/json/add/core.rb
index e9850af..fde53a4 100644
--- a/lib/json/add/core.rb
+++ b/lib/json/add/core.rb
@@ -5,6 +5,8 @@ unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
   require 'json'
 end
 require 'date'
+require 'complex'
+require 'rational'
 
 # Symbol serialization/deserialization
 class Symbol
@@ -230,8 +232,8 @@ class Regexp
   def as_json(*)
     {
       JSON.create_id => self.class.name,
-      'o' => options,
-      's' => source,
+      'o'            => options,
+      's'            => source,
     }
   end
 
@@ -241,3 +243,39 @@ class Regexp
     as_json.to_json
   end
 end
+
+class Rational
+  def self.json_create(object)
+    Rational(object['n'], object['d'])
+  end
+
+  def as_json(*)
+    {
+      JSON.create_id => self.class.name,
+      'n'            => numerator,
+      'd'            => denominator,
+    }
+  end
+
+  def to_json(*)
+    as_json.to_json
+  end
+end
+
+class Complex
+  def self.json_create(object)
+    Complex(object['r'], object['i'])
+  end
+
+  def as_json(*)
+    {
+      JSON.create_id => self.class.name,
+      'r'            => real,
+      'i'            => imag,
+    }
+  end
+
+  def to_json(*)
+    as_json.to_json
+  end
+end
diff --git a/tests/test_json_addition.rb b/tests/test_json_addition.rb
index a8181e8..f28f228 100755
--- a/tests/test_json_addition.rb
+++ b/tests/test_json_addition.rb
@@ -164,4 +164,9 @@ class TC_JSONAddition < Test::Unit::TestCase
     d = DateTime.civil(2008, 6, 17, 11, 48, 32, Rational(12,24))
     assert_equal d, JSON.parse(d.to_json)
   end
+
+  def test_rational_complex
+    assert_equal Rational(2, 9), JSON(JSON(Rational(2, 9)))
+    assert_equal Complex(2, 9), JSON(JSON(Complex(2, 9)))
+  end
 end
-- 
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