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From: Andrew Dunstan <[email protected]>
To: David Fetter <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Michael Fuhr <[email protected]>
Cc: [email protected]
Subject: Re: PL/Perl list value return causes segfault
Date: Tue, 12 Jul 2005 18:41:53 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
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	<[email protected]>



David Fetter wrote:

>On Tue, Jul 12, 2005 at 03:45:55PM -0400, Andrew Dunstan wrote:
>  
>
>>
>>In perl, if there is any ambiguity it is the called function that is
>>responsible for checking, not the caller. See "perldoc -f
>>wantarray".  PLPerl explicitly passed G_SCALAR as a flag on all
>>calls to plperl routines. So returning a list is a case of pilot
>>error.
>>    
>>
>
>Is this a kind of pilot error that documents could help avert in some
>useful way?
>
>
>  
>

Sure. "A plperl function must always return a scalar value.More complex 
structures (arrays, records, and sets) can be returned in the 
appropriate context by returning a reference. A list should never be 
returned."  Salt to taste and insert where appropriate.

cheers

andrew

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