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Sat, 23 Mar 2024 14:48:47 -0700 (PDT) MIME-Version: 1.0 References: <20240321100710.GA164665@qaa.vinc17.org> In-Reply-To: From: Bart Schaefer Date: Sat, 23 Mar 2024 14:48:36 -0700 Message-ID: Subject: Re: behavior of test true -a \( ! -a \) To: zsh-workers@zsh.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 52801 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: On Thu, Mar 21, 2024 at 10:39=E2=80=AFAM Bart Schaefer wrote: > > I'm guessing the change is from commit 2afa556d8 (workers/31696). That commit includes this comment: + /* + * In "test" compatibility mode, "! -a ..." and "! -o ..." + * are treated as "[string] [and] ..." and "[string] [or] ...". + */ The way this is tested was changed first at commit cb596a55 (workers/35306) and again at commit daa208e9 (workers/49269) to end up with this: if (!(n_testargs > 2 && (check_cond(*testargs, "a") || check_cond(*testargs, "o")))) So this means that in the original example: % test true -a \( ! -a \) ; echo $? test: argument expected The closing \) is being treated as the string argument of [ ! -a \) ] rather than as a match for the opening \(. Which you can see by: % test \( ! -a \) \) % echo $? 0 % test \( ! -a \) \) \) test: too many arguments I'd therefore argue that it's actually % test \( ! -a \) that is wrong: It should be complaining of a missing close paren, rather than magically reverting to treating "!" as "not" (and also "-a" as a plain string). It's entirely dependent on the count of arguments rather than on treating parens as tokens.