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-rw-r--r--gnu/packages/lisp-xyz.scm34
1 files changed, 34 insertions, 0 deletions
diff --git a/gnu/packages/lisp-xyz.scm b/gnu/packages/lisp-xyz.scm
index f7663b3f8a..8f98627a5a 100644
--- a/gnu/packages/lisp-xyz.scm
+++ b/gnu/packages/lisp-xyz.scm
@@ -21759,3 +21759,37 @@ of a symbol.")
(define-public ecl-definitions
(sbcl-package->ecl-package sbcl-definitions))
+
+(define-public sbcl-filtered-functions
+ (let ((commit "130f69e7b9e1051bf569ef63364b09a3873f0ced"))
+ (package
+ (name "sbcl-filtered-functions")
+ (version (git-version "0.2.0" "1" commit))
+ (source
+ (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "https://github.com/pcostanza/filtered-functions")
+ (commit commit)))
+ (file-name (git-file-name "cl-filtered-functions" version))
+ (sha256
+ (base32 "0m13k8pl0gfll8ss83c0z3gax7zrrw2i4s26451jfbka1xr4fgy9"))))
+ (build-system asdf-build-system/sbcl)
+ (inputs
+ (list sbcl-closer-mop))
+ (home-page "https://github.com/pcostanza/filtered-functions")
+ (synopsis "Extension of CLOS generic function invocation")
+ (description
+ "Filtered functions provide an extension of CLOS generic function
+invocation that add a simple preprocessing step before the actual method
+dispatch is performed and thus enable the use of arbitrary predicates for
+selecting and applying methods. See
+@url{http://www.p-cos.net/documents/filtered-dispatch.pdf} for a paper that
+introduces and explains filtered functions in detail.")
+ (license license:expat))))
+
+(define-public cl-filtered-functions
+ (sbcl-package->cl-source-package sbcl-filtered-functions))
+
+(define-public ecl-filtered-functions
+ (sbcl-package->ecl-package sbcl-filtered-functions))