95 lines
3.6 KiB
EmacsLisp
95 lines
3.6 KiB
EmacsLisp
;;; origami-parsers.el --- Collection of parsers -*- lexical-binding: t -*-
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;; Author: Greg Sexton <gregsexton@gmail.com>
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;; Version: 1.0
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;; Keywords: parsers
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;; URL: https://github.com/gregsexton/
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;; The MIT License (MIT)
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;; Copyright (c) 2014 Greg Sexton
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;; Permission is hereby granted, free of charge, to any person obtaining a copy
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;; of this software and associated documentation files (the "Software"), to deal
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;; in the Software without restriction, including without limitation the rights
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;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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;; copies of the Software, and to permit persons to whom the Software is
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;; furnished to do so, subject to the following conditions:
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;; The above copyright notice and this permission notice shall be included in
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;; all copies or substantial portions of the Software.
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;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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;; THE SOFTWARE.
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;;; Commentary:
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;;; Code:
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(require 'parser)
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(defcustom origami-parser-alist
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'((java-mode . origami-c-style-parser)
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(c-mode . origami-c-style-parser)
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(c++-mode . origami-c-style-parser)
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(emacs-lisp-mode . origami-elisp-parser)
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(lisp-interaction-mode . origami-elisp-parser))
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"alist mapping major-mode to parser function."
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:type 'hook
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:group 'origami)
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(defun origami-pair (start children end create)
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;; TODO: make this a macro so I don't have to pass in the thunk?
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"CHILDREN should be a zero-arg lambda -- a thunk -- returning a
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parser to allow for recursive nesting of a parser. CREATE is a
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function that should build state taking the beginning, end and
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children of the pair."
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(parser-do (initial-pos <- (parser-position))
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(begin <- start)
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(children <- (funcall children))
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(end <- end)
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(parser-return (funcall create initial-pos end (- begin initial-pos) children))))
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(defun origami-c-style-parser (create)
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(let ((pair (origami-pair (parser-char "{")
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(lambda () (origami-c-style-parser create))
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(parser-char "}")
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create)))
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(parser-0+ (parser-conj
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(parser-do
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(parser-drop-until-regex "[{}]")
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(parser-1? pair))
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pair))))
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(defun origami-paren-parser (create)
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(let ((pair (origami-pair (parser-char "(")
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(lambda () (origami-paren-parser create))
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(parser-char ")")
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create)))
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(parser-0+ (parser-conj
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(parser-do
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(parser-drop-until-regex "[()]")
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(parser-1? pair))
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pair))))
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(defun origami-elisp-parser (create)
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(let ((def-regex "(def\\w*\\s-*\\(\\s_\\|\\w\\)*"))
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(let ((pair (origami-pair (parser-regex def-regex)
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(lambda () (origami-paren-parser (lambda (&rest _) nil)))
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(parser-char ")")
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create)))
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(parser-0+ (parser-conj
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(parser-do
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(parser-drop-until-regex (concat def-regex "\\|)"))
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(parser-1? pair))
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pair)))))
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(provide 'origami-parsers)
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;;; parser.el ends here
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