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  2. RPG400-L
  3. January 2009

Re: CONST and VALUE revisited

Jeff Young wrote:
Based on that info, CONST is enforced by the compiler ONLY if you are
using sub-procedures. If you are using an external service program or
just another program, then using VALUE is the only way to ensure that
the parameter will not be changed on return from the call.

I don't think the compiler will let you change a parameter passed as const under any circumstances.

The compiler looks at the procedure interface (PI) for a procedure to make the determination.

IIRC, it won't even let you get the address of a parameter passed as const (using %addr), so you can't do direct memory manipulation via a pointer.

Mark L's summary was right on the mark.

david


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