| Re: idl5.3 create_struct() [message #18497] |
Wed, 05 January 2000 00:00  |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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Liam Gumley wrote:
>
> "R.Bauer" wrote:
>> I was very surprised and afraid this morning about the definition
>> changes of possible signs on tagname definitions.
>>
>> The only non_alphanumeric signs which are allowed in the new version is
>> '$' and '_'.
>> The '!' sign is only defined for the first place.
>>
>> a=create_struct('test@core',1)
>> % CREATE_STRUCT: Illegal tag name: test@core.
>> % Execution halted at: $MAIN$
>>
>> I have had no information about such changes I don't found any hint's in
>> the what's new topics.
>
> I noticed the same thing in the IDL 5.3 beta release in September 1999.
> RSI technical support told me this was a *bug* in IDL prior to version
> 5.3. According to the IDL documentation, structure tag names must
> conform to the same rules as variable names. As far back as IDL 5.1,
> this was documented in 'Building IDL Applications/Structures/Creating
> and Defining Structures':
>
> "Structure names and tag names follow the rules of IDL identifiers: they
> must begin with a letter; following characters can be letters, digits,
> or the underscore or dollar sign characters; and case is ignored."
I am hoping that's there is a bug in the description because I am using
very often
the '!' sign in the first place.
IDL> a=create_struct('!global','test')
IDL> help,a,/str
** Structure <1354968>, 1 tags, length=8, refs=1:
!GLOBAL STRING 'test'
I need this sign to separate user defintion from system definitions.
R.Bauer
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