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Creating pointer in structure [message #27752]

Thu, 01 November 2001 06:19

K. Bowman
Messages: 330
Registered: May 2000

Senior Member

If I need to define a structure containing a pointer before I know the
characteristics of the associated heap variable, which of the following
is preferable? Does it make any difference, or is it simply a matter
of programming taste?

For example:

a = {point: PTR_NEW()} ;Create struct w/ null pointer
... figure out what n is
a.point = PTR_NEW(FINDGEN(n)) ;Replace null pointer

or

b = {point: PTR_NEW(/ALLOCATE_HEAP)} ;Create struct w/ pointer->undef
... figure out what n is
*b.point = FINDGEN(n) ;Define heap var

Thanks, Ken

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