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;;; syntax-tests.el --- tests for syntax.c functions -*- lexical-binding: t -*-
;; Copyright (C) 2017-2020 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
(ert-deftest parse-partial-sexp-continue-over-comment-marker ()
"Continue a parse that stopped in the middle of a comment marker."
(with-temp-buffer
(let ((table (make-syntax-table)))
(modify-syntax-entry ?/ ". 124")
(modify-syntax-entry ?* ". 23b")
(set-syntax-table table))
(insert "/*C*/\nX")
(goto-char (point-min))
(let* ((pointC (progn (search-forward "C") (1- (point))))
(preC (1- pointC))
(pointX (progn (search-forward "X") (1- (point))))
(aftC (+ 2 pointC))
(ppsC (parse-partial-sexp (point-min) pointC))
(pps-preC (parse-partial-sexp (point-min) preC))
(pps-aftC (parse-partial-sexp (point-min) aftC))
(ppsX (parse-partial-sexp (point-min) pointX)))
;; C should be inside comment.
(should (= (nth 0 ppsC) 0))
(should (eq (nth 4 ppsC) t))
(should (= (nth 8 ppsC) (- pointC 2)))
;; X should not be in comment or list.
(should (= (nth 0 ppsX) 0))
(should-not (nth 4 ppsX))
;; Try using OLDSTATE.
(should (equal (parse-partial-sexp preC pointC nil nil pps-preC)
ppsC))
(should (equal (parse-partial-sexp pointC aftC nil nil ppsC)
pps-aftC))
(should (equal (parse-partial-sexp preC aftC nil nil pps-preC)
pps-aftC))
(should (equal (parse-partial-sexp aftC pointX nil nil pps-aftC)
ppsX)))))
(ert-deftest parse-partial-sexp-paren-comments ()
"Test syntax parsing with paren comment markers.
Specifically, where the first character of the comment marker is
also has open paren syntax (see Bug#24870)."
(with-temp-buffer
(let ((table (make-syntax-table)))
(modify-syntax-entry ?\{ "(}1nb" table)
(modify-syntax-entry ?\} "){4nb" table)
(modify-syntax-entry ?- ". 123" table)
(set-syntax-table table))
(insert "{-C-}\nX")
(goto-char (point-min))
(let* ((pointC (progn (search-forward "C") (1- (point))))
(pointX (progn (search-forward "X") (1- (point))))
(ppsC (parse-partial-sexp (point-min) pointC))
(ppsX (parse-partial-sexp (point-min) pointX)))
;; C should be inside nestable comment, not list.
(should (= (nth 0 ppsC) 0))
(should (= (nth 4 ppsC) 1))
(should (= (nth 8 ppsC) (- pointC 2)))
;; X should not be in comment or list.
(should (= (nth 0 ppsX) 0))
(should-not (nth 4 ppsX))
;; Try using OLDSTATE.
(should (equal (parse-partial-sexp pointC pointX nil nil ppsC)
ppsX)))))
;;; syntax-tests.el ends here
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