Case insensitive enumeration class
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Phillip
il 19 Set 2016
Modificato: Sean de Wolski
il 20 Set 2016
Hi,
How does one create a case insensitive enumeration class?
So that one could call it as:
aRed = colourEnum.RED;
aRed = colourEnum.red;
aRed = colourEnum.ReD;
I would also like to confirm that enumerations must follow variable naming conventions. Ie you can't have an enum that is:
enumclass.A/B
Am I right in this?
Regards, Phillip
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Brendan Hamm
il 19 Set 2016
Why would you want to have your enumeration be able to have any case?
The only place I could consider this, is if the user has to specify the string via some form of text input e.g. an inputdlg. If this is the case, then you should simply do a case insensitive string validation and with this result dynamically create your object:
val = validatestring('red',{'Red'})
aRed = colourEnum.(val)
Other than this, the MATLAB command prompt will alert the user of the correct case of the characters involved.
Yes. Enumerations must conform to the MATLAB variable naming convention.
Più risposte (1)
Sean de Wolski
il 19 Set 2016
You could use a containers.Map to use non-MATLAB variable names if you want:
mapper = containers.Map('enumclass.A/B','A')
mapper('enumclass.A/B')
3 Commenti
Sean de Wolski
il 20 Set 2016
Modificato: Sean de Wolski
il 20 Set 2016
Hi Phillip,
What I was suggesting won't work the way you have it above. For best looks, what you're doing is probably best. I was thinking more like a factory function to generate the enumerations given any key. disp can be overloaded to make it look right. This is probably not a good idea, but it is possible.
e = genEnum('Hello World')
e =
Hello World
Function
function enumObj = genEnum(key)
mapper = containers.Map({'enumclass.A/B','Hello World'},{'A','B'});
enum = mapper(key);
enumObj = EnumClass.(enum);
end
And
classdef EnumClass
enumeration
A
B
end
methods
function disp(obj)
mapper = containers.Map({'A','B'},{'enumclass.A/B','Hello World'});
label = mapper(char(obj));
disp(label)
end
end
end
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