Implement asserting references.
* gash/word.scm (word->qword): Add an implementation for the '<sh-ref-assert>' and '<sh-ref-assert*>' cases. * tests/variable-operators.org: New file. * Makefile.am (FULL_TESTS): Add it.
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@ -147,6 +147,7 @@ FULL_TESTS = \
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tests/signals.org \
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tests/temporary-assignments.org \
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tests/variable-and.org \
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tests/variable-operators.org \
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tests/variable-or.org \
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tests/variable-patterns.org \
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tests/variable-words.org \
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@ -278,9 +278,15 @@ and arithmetic substitions."
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(setvar! name new-value)
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new-value))))
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(('<sh-ref-assert> name message)
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(error (format #f "Not implemented: ~s" word)))
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(or (parameter-ref name)
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(let ((message* (expand-word message #:output 'string)))
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(throw 'shell-error (format #f "~a: ~a" name message*)))))
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(('<sh-ref-assert*> name message)
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(error (format #f "Not implemented: ~s" word)))
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(let ((value (parameter-ref name)))
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(if (string-not-null? value)
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value
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(let ((message* (expand-word message #:output 'string)))
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(throw 'shell-error (format #f "~a: ~a" name message*))))))
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(('<sh-ref-and> name value)
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(if (string-not-null? (parameter-ref name))
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(word->qword (or value ""))
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@ -0,0 +1,26 @@
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;;; Gash -- Guile As SHell
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;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash 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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;;; Gash 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 Gash. If not, see <http://www.gnu.org/licenses/>.
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* Errors on failed asserting reference
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:script:
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#+begin_src sh
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echo ${x?not set}
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echo not shown
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#+end_src
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:status: 1
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:stdout: ""
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