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| Function call -- by value or by reference |
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| vijaishree |
 Posted: Thu Feb 12, 2004 3:30 am Post subject: Function call -- by value or by reference |
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Newbie
Joined: 11 Feb 2004
Posts: 6
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Hi,
in languages like C, function calls can be made by value or by reference. When we make a function call in EQSL, is that by value or by reference ?
If by value, then how do we make calls by reference ?
Thanks ! |
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| mgk |
| Posted: Thu Feb 12, 2004 5:53 am Post subject: |
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Padawan
Joined: 31 Jul 2003
Posts: 1642
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Actually in C all calls are by value, even when you pass a pointer, a copy of the pointer is passed, (it's just hard to tell the difference) but the effect is a by reference semantic.
ESQL has direction types in the parameters to procedures, but not functions, so call-by-reference is not supported for functions, as we did not want functions with side-effects. So use to a call-by-reference semantic, use a procedure, and use INOUT direction for the parameter.
Cheers,
_________________
MGK
The postings I make on this site are my own and don't necessarily represent IBM's positions, strategies or opinions. |
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| vijaishree |
| Posted: Mon Feb 16, 2004 2:35 am Post subject: |
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Newbie
Joined: 11 Feb 2004
Posts: 6
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Hi mgk,
thanks for that response !! |
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