46 lines
1.5 KiB
EmacsLisp
46 lines
1.5 KiB
EmacsLisp
;;; Cube --- Cube library of FG42 -*- lexical-binding: t; -*-
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;;
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;; Copyright (c) 2010-2020 Sameer Rahmani & Contributors
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;;
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;; Author: Sameer Rahmani <lxsameer@gnu.org>
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;; URL: https://gitlab.com/FG42/FG42
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;; Version: 3.0.0
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;;
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;
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;;; Commentary:
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;; Cubes are the building blocks of any `FG42' editor. Each `cube' is a
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;; unit which defines different abilities in a deterministic and idempotent
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;; way. Cubes are composable and a composition of cubes creates an editor.
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;;
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;;; Code:
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(require 'fg42/utils)
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(require 'fg42/state)
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(defun fg42/cube-apply (state cube)
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"Apply the given CUBE to the given STATE.
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It returns a cons of (new-state . cube)."
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(cons state cube))
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(defun fg42/cube-bind (m f)
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"Bind the state monad M with the given function F."
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(let ((binder (fg42/state-bind-maker #'fg42/cube-apply)))
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(funcall binder m f)))
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(provide 'fg42/cube)
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;;; cube.el ends here
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