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bh=zNHZC2x0bzg86+LJ6R9mjuO+y1wIQTX6isk9m5GSvHw=; b=RROIe0W5NX8hPlOlyj14PBl/vMPoS+2tZjAKyxXRQSFq7JXRgUG1hYx124WUvlA8zs 6vKBWsDrHYu9tixixAfGEICXAb1EEFUBS8rnQ41tkNEIMTZ3xMUvGd1tmDHB7IRTiXR+ nHpgvCssVhmOPiiy0avL9PMiAzqh2kd9s5F0lGdTPUSB8zxHNzKTOyBTZmeh8inHd12X cCu1ww1nektM1yHx4bvAdHMiqvyjp9zphqLoYTsfbjF33FtY2o+AzlVxXeS2TqQqeSOj T8LZGEjKl5Zr0HmL7XsL+qHu1nUntDyKxr9fUDgYexXb67jOIKvRr0OYcWPzZ5fZkIxU 6wBw== X-Gm-Message-State: AOJu0YykzWoEb1xTK2bZ06MscjCIKNyTAboeuKDaWG66VQIRjfjAz/B1 gNYUbqpbyb2mEp2WNliYOKNmq77OWXI075r6sVVjggXM1r0XeE7cSG9LLdkrJkrz9MyvIuO+S0D Pf63Fqqw3GBGwee3lKy/lvV60gXlLFo/4FNAXThmXUkxL/GR9oo9W X-Google-Smtp-Source: AGHT+IG3+cPO4JiNrKesg5+HF4FOStcgd5fkuove9DiNi1WVNYhWfwPJJAInajV6S6UolfhjQUgE11rOlSBNuJvVEKY= X-Received: by 2002:a17:906:3e09:b0:a4d:f2db:3f2c with SMTP id k9-20020a1709063e0900b00a4df2db3f2cmr704205eji.12.1711588351861; Wed, 27 Mar 2024 18:12:31 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Bart Schaefer Date: Wed, 27 Mar 2024 18:12:20 -0700 Message-ID: Subject: Re: Nofork ${{var}...} edge cases To: Mikael Magnusson Cc: Zsh hackers list Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 52838 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 Wed, Mar 27, 2024 at 5:29=E2=80=AFPM Mikael Magnusson wrote: > > > Should ${{var}} be a "bad substitution", or print a warning about an > > empty command? Otherwise it just substitutes $var. > > Is a space no longer required after } (formerly ||) to trigger the > command substitution? A space was never required, it was just a convention I always followed when writing examples: % echo ${|x|x=3Dfoo} foo mksh doesn't require a space in ${|REPLY=3Dfoo} either. > I personally would like to get an error in this > case because missing a $ in nested substitutions is a fairly common > typo. Yes, I was just musing about that possibility myself. > Eg I meant ${${var}}. And if no space is required, does that > mean if you typo ${${foo}:-blabla} into ${{foo}:-blabla}, :-blabla is > suddenly executed as a command? With the patch as submitted so far, yes. But requiring a space there should be easy, and a pretty reasonable requirement.