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Assigning command line arguments to variables in another procedure [message #89261]

Sun, 10 August 2014 15:57

tryanblogs
Messages: 3
Registered: August 2014

Junior Member

IDL beginner here! Let's say I have two procedures, PRO1 and PRO2. If I receive a command line argument in PRO2, how can I assign the argument value to a variable in PRO1?

Is this possible to accomplish without passing a parameter in a procedure call? Example:

PRO PRO2
value = command_line_argument
PRO1, value
END

PRO PRO1, value
A = value
END

I have previously tried to make an object reference ,'My', to PRO1, but I receive a syntax error.

PRO PRO2
opts = ob_new('mg_options)
opts.addOption, 'value', 'v'
opts.parseArgs,error_message = errorMsg

My = obj_new('PRO1')
My.A=opts.get('value') ;syntax error on this line
END

Any insight is very much appreciated!

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Re: Assigning command line arguments to variables in another procedure [message #89262 is a reply to message #89261]

Sun, 10 August 2014 16:12

Matthew Argall
Messages: 286
Registered: October 2011

Senior Member

How about this?

IDL> myPro1, 'This is my argument.'
In myPro1
In myPro2
This is my argument.

----------------------------------

pro myPro2, value
print, 'In myPro2'
print, value
end

pro myPro1, input_from_command_line
print, 'In myPro1'
myPro2, input_from_command_line
end

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Re: Assigning command line arguments to variables in another procedure [message #89263 is a reply to message #89262]

Sun, 10 August 2014 19:32

tryanblogs
Messages: 3
Registered: August 2014

Junior Member

Matthew,

Thank you for your response. I'm not sure this will perform the desired action. I apologize if I'm missing something obvious, but passing values in a procedure call doesn't seem to accomplish what I'm trying to do. In the program I am attempting to write, the variables that will be assigned values from command line arguments are not predetermined and will vary with each case, so I don't think passing values through procedure arguments will work. Is it possible to assign variables in Pro1 with command line argument values from Pro2 using object references?

In java, it would look something like this:

Class Pro2 {
Pro1 My = new Pro1()
My.Pro1variable = command_line_args
}

where My is the object reference of Pro1 and the Pro1variable is given the value of the command line inputted in Pro2.

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Re: Assigning command line arguments to variables in another procedure [message #89267 is a reply to message #89261]

Mon, 11 August 2014 02:56

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

"You are doing it all wrong". You should read about classes in IDL:

http://www.exelisvis.com/docs/ref_part2.html
http://www.exelisvis.com/docs/creating_custom_objects.html

Hint #1: Unlike in Java, not everything is a class in IDL.

Hint #2: PRO does not implement a class, but a procedure ("function" with no return value). Thus "My = obj_new('PRO1')" with PRO1 being a procedure, does not make sense.

Hint #3: Event if PRO1 was a class with a member called A, you cannot assign to the member with "My.A" in IDL.

On Monday, 11 August 2014 00:57:40 UTC+2, tryan...@gmail.com wrote:
> IDL beginner here! Let's say I have two procedures, PRO1 and PRO2. If I receive a command line argument in PRO2, how can I assign the argument value to a variable in PRO1?
>
>
>
> Is this possible to accomplish without passing a parameter in a procedure call? Example:
>
>
>
> PRO PRO2
>
> value = command_line_argument
>
> PRO1, value
>
> END
>
>
>
> PRO PRO1, value
>
> A = value
>
> END
>
>
>
> I have previously tried to make an object reference ,'My', to PRO1, but I receive a syntax error.
>
>
>
> PRO PRO2
>
> opts = ob_new('mg_options)
>
> opts.addOption, 'value', 'v'
>
> opts.parseArgs,error_message = errorMsg
>
>
>
> My = obj_new('PRO1')
>
> My.A=opts.get('value') ;syntax error on this line
>
> END
>
>
>
> Any insight is very much appreciated!

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Re: Assigning command line arguments to variables in another procedure [message #89268 is a reply to message #89267]

Mon, 11 August 2014 08:19

skymaxwell@gmail.com is currently offline

skymaxwell@gmail.com
Messages: 127
Registered: January 2007

Senior Member

Look at IDL help for _EXTRA and _REF_EXTRA keywords

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