Re: [Help-bash] Assigning builtins behavior

[Eric Blake]

On 01/08/2018 07:07 AM, Eric Blake wrote:
> On 01/07/2018 03:10 PM, Quentin L'Hours wrote:
>> Hi,
>>
>> I've always thought builtins could not have a custom parsing, however it
>> seems that export/readonly/declare/local (all the builtins creating an
>> assignment) are able to disable field splitting when an assignment takes
>> place, why is that? I know a simple assignment disables field splitting,
>> but after all that's because the grammar states it should, but doesn't
>> POSIX requires all simple commands to have the same splitting behavior?
> 
> No, POSIX actually documents the notion of an "assignment context", and
> builtins like export/readonly/declare/local are all examples of commands
> with assignment context parsing:
> 
> http://austingroupbugs.net/view.php?id=960#c2777

Apologies for linking to the wrong place; I meant this one:

http://austingroupbugs.net/view.php?id=351#c865

which defines the term "Declaration Utility" for something that parses
its arguments in assignment context.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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