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| -rw-r--r-- | gnu/packages/lisp.scm | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/gnu/packages/lisp.scm b/gnu/packages/lisp.scm index debe568347..88261d5f8e 100644 --- a/gnu/packages/lisp.scm +++ b/gnu/packages/lisp.scm @@ -7557,3 +7557,40 @@ trees to dispatch on string equality.") (define-public ecl-string-case (sbcl-package->ecl-package sbcl-string-case)) + +(define-public sbcl-global-vars + (let ((commit "c749f32c9b606a1457daa47d59630708ac0c266e") + (revision "0")) + (package + (name "sbcl-global-vars") + (version (git-version "1.0.0" revision commit)) + (home-page "https://github.com/lmj/global-vars") + (source + (origin + (method git-fetch) + (uri (git-reference + (url home-page) + (commit commit))) + (file-name (git-file-name name version)) + (sha256 + (base32 + "06m3xc8l3pgsapl8fvsi9wf6y46zs75cp9zn7zh6dc65v4s5wz3d")))) + (build-system asdf-build-system/sbcl) + (synopsis "Efficient global variables in Common Lisp") + (description + "In Common Lisp, a special variable that is never dynamically bound +typically serves as a stand-in for a global variable. The @code{global-vars} +library provides true global variables that are implemented by some compilers. +An attempt to rebind a global variable properly results in a compiler error. +That is, a global variable cannot be dynamically bound. + +Global variables therefore allow us to communicate an intended usage that +differs from special variables. Global variables are also more efficient than +special variables, especially in the presence of threads.") + (license license:expat)))) + +(define-public cl-global-vars + (sbcl-package->cl-source-package sbcl-global-vars)) + +(define-public ecl-global-vars + (sbcl-package->ecl-package sbcl-global-vars)) |