From: Robert Berger <gmane@reliableembeddedsystems.com>
To: yocto@yoctoproject.org
Subject: Re: docs: standardizing on "+=" versus "_append" for clarity
Date: Thu, 05 May 2016 00:59:01 +0300 [thread overview]
Message-ID: <572A70A5.5000607@reliableembeddedsystems.com> (raw)
In-Reply-To: <alpine.LFD.2.20.1605040709320.20578@localhost.localdomain>
Hi,
On 05/04/2016 02:20 PM, Robert P. J. Day wrote:>
> i understand that there are times when you *want* _append to delay
> processing until the end, and i understand that conditional appending
> with OVERRIDES requires the "_append" syntax, but other than these
> special cases, is there an encouraged standard to use "+=" if either
> syntax will do?
That's my understanding:
_append (override style syntax):
append without spaces,
differs from :=,.=,=.,+=,=+ because assignment is deferred until after
parsing,
can be used with executable meta data
.= :
appending without spaces, immediate assignment
+= :
appending with spaces, immediate assignment
All of them have left and right hand side variable expansion recursive
when used.
>
> rday
>
Regards,
Robert
..."C++ is an horrible language" - Linux Torvalds
My public pgp key is available,at:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x90320BF1
prev parent reply other threads:[~2016-05-04 21:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-04 11:20 docs: standardizing on "+=" versus "_append" for clarity Robert P. J. Day
2016-05-04 21:59 ` Robert Berger [this message]
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