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How to get _overloadSize to return N_Dimensions=0? [message #88661]

Tue, 27 May 2014 15:40

Matthew Argall
Messages: 286
Registered: October 2011

Senior Member

I was wondering how it is possible to get the _overloadSize function to return N_DIMENSION=0 when there are no dimensions. Below is an example. The docs seems like it reports N_Elements(Size(input, /DIMENSIONS), which is not correct for an undefined variable...

IDL> print, size(!Null, /N_DIMENSIONS)
0
IDL> .run test_olsize__define
Dimensions: [0]
N_Elements: 0
N_Dimensions: 1

;-----------------------------------------------
function test_olSize::_OverloadSize
return, size(*self.value, /N_DIMENSIONS)
end

function test_olSize::Init
compile_opt strictarr
self.value = Ptr_New(/ALLOCATE_HEAP)
return, 1
end

pro test_olSize__define
class = {test_olSize, $
inherits IDL_Object, $
value: ptr_new()}
end

;Main level test program
myObj = Obj_New('Test_olSize')
print, 'Dimensions: ', '[' + strjoin(strtrim(size(myObj, /DIMENSIONS), 2), ', ') + ']'
print, 'N_Elements: ', strtrim(size(myObj, /N_ELEMENTS), 2)
print, 'N_Dimensions: ', strtrim(size(myObj, /N_DIMENSIONS), 2)
obj_destroy, myObj

end

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[Message index]

		How to get _overloadSize to return N_Dimensions=0? By: Matthew Argall on Tue, 27 May 2014 15:40
		Re: How to get _overloadSize to return N_Dimensions=0? By: chris_torrence@NOSPAM on Tue, 27 May 2014 20:14
		Re: How to get _overloadSize to return N_Dimensions=0? By: Matthew Argall on Tue, 18 April 2017 06:56
		Re: How to get _overloadSize to return N_Dimensions=0? By: Michael Galloy on Wed, 19 April 2017 14:19
		Re: How to get _overloadSize to return N_Dimensions=0? By: Matthew Argall on Fri, 21 April 2017 09:48

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