Extract version number from the source

"requiring version.rb" strategy has some issues.

- cannot work when cross-compiling
- often introduces wrong namespace
- must know the superclasses
- costs at each runtime than at build-time

etc.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/singleton.rb b/lib/singleton.rb
index 32be573a78..8d53323ad4 100644
--- a/lib/singleton.rb
+++ b/lib/singleton.rb
@@ -92,6 +92,8 @@
 #    p a.strip #  => nil
 #
 module Singleton
+  VERSION = "0.1.0"
+
   # Raises a TypeError to prevent cloning.
   def clone
     raise TypeError, "can't clone instance of singleton #{self.class}"