Re: Please tell me why this works. I'm pretty sure it shouldn't....

DennisRootes@xxxxxxxxxxx wrote:

I'm eval'ing a data structure (LikeRec) to another data structure, but there are fields in the first DS that aren't in the second but everything works just fine. My understanding was that this should not work correctly without eval-corr.

[...]

#4595D saveDS DS LikeRec(PMPCNV:*input)
#4595D toDS DS LikeRec(RF$PM:*output)

I think you're just lucky in this case. Without knowing exactly which fields are involved with PMPCNV:*input and RF$PM:*output I can't say for sure, but I can only think of one way this could work.

When you "EVAL toDS=saveDS", you are essentially treating each DS as a big character variable. So, if the layout of each matches up to the length of toDS, you will end up with everything in its right place since the first %len(toDS) bytes of saveDS will be copied to the memory starting at %addr(toDS).

If that doesn't make sense I can give an example. Just let me know.