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-rw-r--r--ext/json/lib/json/add/rational.rb22
1 files changed, 22 insertions, 0 deletions
diff --git a/ext/json/lib/json/add/rational.rb b/ext/json/lib/json/add/rational.rb
new file mode 100644
index 00000000000..867cd92f059
--- /dev/null
+++ b/ext/json/lib/json/add/rational.rb
@@ -0,0 +1,22 @@
+unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
+ require 'json'
+end
+defined?(::Rational) or require 'rational'
+
+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