49 lines
2 KiB
EmacsLisp
49 lines
2 KiB
EmacsLisp
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;;; cl-preloaded.el --- Preloaded part of the CL library -*- lexical-binding: t; -*-
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;; Copyright (C) 2015 Free Software Foundation, Inc
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;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; The expectation is that structs defined with cl-defstruct do not
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;; need cl-lib at run-time, but we'd like to hide the details of the
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;; cl-struct metadata behind the cl-struct-define function, so we put
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;; it in this pre-loaded file.
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;;; Code:
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(defun cl-struct-define (name docstring parent type named slots children-sym
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tag print-auto)
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(if (boundp children-sym)
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(add-to-list children-sym tag)
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(set children-sym (list tag)))
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;; If the cl-generic support, we need to be able to check
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;; if a vector is a cl-struct object, without knowing its particular type.
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;; So we use the (otherwise) unused function slots of the tag symbol
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;; to put a special witness value, to make the check easy and reliable.
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(unless named (fset tag :quick-object-witness-check))
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(put name 'cl-struct-slots slots)
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(put name 'cl-struct-type (list type named))
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(if parent (put name 'cl-struct-include parent))
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(if print-auto (put name 'cl-struct-print print-auto))
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(if docstring (put name 'structure-documentation docstring)))
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(provide 'cl-preloaded)
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;;; cl-preloaded.el ends here
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