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Sat, 14 Aug 2021 11:52:54 -0400 (EDT) Received: by tarpaulin.shahaf.local2 (Postfix, from userid 1005) id 4Gn4h41FX6z4PQ; Sat, 14 Aug 2021 15:52:52 +0000 (UTC) Date: Sat, 14 Aug 2021 15:52:52 +0000 From: Daniel Shahaf To: Lawrence =?iso-8859-1?Q?Vel=E1zquez?= Cc: Zach Riggle , zsh-users@zsh.org Subject: Re: Odd behavior with various (q) array modifiers and non-printable characters (backspace, newline) Message-ID: <20210814155252.GG11391@tarpaulin.shahaf.local2> References: <27bc215c-3916-4afe-b8b3-7946dd0cb4bc@www.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <27bc215c-3916-4afe-b8b3-7946dd0cb4bc@www.fastmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Seq: 26931 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: Lawrence Velázquez wrote on Wed, Aug 11, 2021 at 17:42:09 -0400: > On Wed, Aug 11, 2021, at 5:16 PM, Bart Schaefer wrote: > > You need to stop testing things with "echo". The "echo" builtin > > interprets some backslash escapes itself, which will confuse you about > > what the quoting options have done. > > > > Repeat all your tests instead with > > printf "%s\n" ${(q)...} > > and so on, and come back if you still have questions. > > Additionally, \b and \n are not interpreted in double quotes, so > your initial data does not actually contain BS or NL characters. ⋮ > As per the QUOTING section of zshmisc(1): > > Inside double quotes (""), parameter and command substitution > occur, and `\' quotes the characters `\', ``', `"', `$', > and the first character of $histchars (default `!'). There are third-party plugins that implement syntax highlighting at the prompt (I happen to co-maintain one such plugin). Those plugins are aware of the quoted docs section, so on input such as . % foo "bar \n \\ \x" . they will correctly highlight only the «\\» as an escape sequence, and everything else as literals.