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Re: Defining structuretype during runtime?? QUESTION!! (no reply) [message #5041 is a reply to message #4955]

Fri, 08 September 1995 00:00

sjt
Messages: 72
Registered: November 1993

Member

Christian Oehreneder (PHOTO-Dissertand) (coehrene) wrote:
: MY PROBLEM AGAIN:

: >Schalom!
: >
: >I want to store variables of different type together in structure. The
: >type of each structure elemet is defined DURING RUNTIME.
: >How can I create a structure, whos tag types and tag number are defined
: >at runtime?
: >
: >Thanks in advance
: > Chris
: >

One way is to use handles. I do this for a structure that has to contain
a variable length array of structures; it's not pretty but it works:

e.g.
pdefs= {graff_define, $
.
.
nsets:0, $
data: handle_create(), $
.
.
}

dtmpl= {graff_data, $
xydata: handle_create(), $
.
.
}

handle_value, dtmpl.xydata, fltarr(2,2), /set
handle_value, pdefs.data, dtmpl, /set, no_copy

When you want to use the data structure, you need to use handle_value to
recover it and then replace it after use (no_copy is a good deal quicker
if you are using the structures a lot and certainly more memory efficient)

--
+------------------------+---------------------------------- --+---------+
| James Tappin, | School of Physics & Space Research | O__ |
| sjt@star.sr.bham.ac.uk | University of Birmingham | -- \/` |
| Ph: 0121-414-6462. Fax: 0121-414-3722 | |
+----------------------------------------------------------- --+---------+

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[Message index]

		Defining structuretype during runtime?? QUESTION!! (no reply) By: Christian Oehreneder on Thu, 07 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: Thomas A McGlynn on Mon, 11 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! By: Juergen Paff on Fri, 08 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: sjt on Fri, 08 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: Jackel on Fri, 08 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: Juergen Paff on Thu, 07 September 1995 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: R. Bauer on Mon, 06 October 1997 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: mgs on Mon, 06 October 1997 00:00
		Re: Defining structuretype during runtime?? QUESTION!! (no reply) By: hahn on Sun, 05 October 1997 00:00

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