From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: zsh-workers@zsh.org
Subject: Re: return builtin to end a script
Date: Fri, 16 Feb 2024 15:00:46 +0000 (GMT) [thread overview]
Message-ID: <1477282494.4172725.1708095646170@mail.virginmedia.com> (raw)
In-Reply-To: <649539330.4169803.1708093485977@mail.virginmedia.com>
>On 16/02/2024 14:24 GMT Peter Stephenson <p.w.stephenson@ntlworld.com> wrote:
>> On 16/02/2024 12:58 GMT Vincent Lefevre <vincent@vinc17.net> wrote:
>>
>>
>> The return builtin is currently specified only for shell functions
>> and "." scripts, while it would also be useful to end a script,
>> for instance to be able to use zsh script both as commands (e.g.
>> from non-zsh shells) and as autoloaded functions in zsh.
>>
>> So I think that it would be useful to extend it to end a script.
>
> I remember adding this a long time ago now.
>
> It looks like the documentation is defective.
Having looked at the code, I think this does indeed already work,
with the (presumably expected) limitation that in an interactive
shell you don't exit from the outermost shell environment.
pws
diff --git a/Doc/Zsh/builtins.yo b/Doc/Zsh/builtins.yo
index 1aa8076..7a8654f 100644
--- a/Doc/Zsh/builtins.yo
+++ b/Doc/Zsh/builtins.yo
@@ -1649,7 +1649,9 @@ cindex(functions, returning from)
item(tt(return) [ var(n) ])(
Causes a shell function or `tt(.)' script to return to
the invoking script with the return status specified by
-an arithmetic expression var(n).
+an arithmetic expression var(n). Also causes a non-interctive
+shell to exit, allowing files containing shell code to be used
+both as scripts and as autoloadable shell functions.
For example, the following prints `tt(42)':
example(() { integer foo=40; return "foo + 2" }
prev parent reply other threads:[~2024-02-16 15:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-16 12:58 Vincent Lefevre
2024-02-16 14:24 ` Peter Stephenson
2024-02-16 15:00 ` Peter Stephenson [this message]
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