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Wed, 11 Nov 2020 16:20:06 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a4f:6185:0:0:0:0:0 with HTTP; Wed, 11 Nov 2020 16:20:05 -0800 (PST) In-Reply-To: References: From: Mikael Magnusson Date: Thu, 12 Nov 2020 01:20:05 +0100 Message-ID: Subject: Re: Bug with unset variables To: Zsh hackers list Content-Type: text/plain; charset="UTF-8" X-Seq: 47542 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: Archived-At: On 11/11/20, Felipe Contreras wrote: > On Wed, Nov 11, 2020 at 12:17 PM Roman Perepelitsa > wrote: >> > Not only does this behavior differ from all other shells, but >> > basically all languages. >> >> All languages? That seems exaggerated. How about this? >> >> int var; > > You are specifying a type. I obviously meant all languages where you > can do the equivalent of "declare var" (without a type). > > That being said, the most similar to shell's "declare var" in C is > "char *var" which defaults to null on most systems. This is certainly not true, just for the record. Variables in global or static scope are initialized to 0 regardless of type, whereas others are uninitialized (meaning they contain garbage, not that they magically know that they haven't been assigned to). -- Mikael Magnusson