The egison package
An interpreter for Egison, the world's first programming langugage which realized non-linear pattern-matching with unfree data types. With Egison, you can represent pattern-matching with unfree data types intuitively, especially for collection data, such as lists, multisets, sets. You can find Egison programs in "lib/" and "sample/" directories. This package also include Emacs Lisp file "egison-mode.el" in "elisp/" directory.
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