Removed monoid class.

1 files changed, 0 insertions, 26 deletions

diff --git a/monad/monoid.scm b/monad/monoid.scm
deleted file mode 100644
index 4b10a72..0000000
--- a/monad/monoid.scm
+++ /dev/null
@@ -1,26 +0,0 @@
-;;; ???
-(define-module (monad monoid)
-  #:use-module (oop goops)
-  #:use-module (srfi srfi-1)
-  #:export (null mappend <>))
-
-(define-generic null)
-(define-generic mappend)
-
-(define (<> . args)
-  (fold mappend (null (car args)) (reverse args)))
-
-;;; Lists
-
-(define-method (mappend (a <pair>) (b <pair>))
-  (append a b))
-(define-method (mappend (a <pair>) (b <null>)) a)
-(define-method (mappend (a <null>) (b <pair>)) b)
-(define-method (mappend (a <null>) (b <null>)) '())
-(define-method (null (a <pair>)) '())
-(define-method (null (a <null>)) '())
-
-;;; Strings
-(define-method (mappend (a <string>) (b <string>))
-  (string-append a b))
-(define-method (null (a <string>)) "")