How do I use a class property validation function with a dynamic argument?

Question

Jan Siegmund 2020-11-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/647678-how-do-i-use-a-class-property-validation-function-with-a-dynamic-argument

回答： Jan Siegmund 2020-11-14

In Matlab OOP, I wanna use a function like mustBeEqualSize(a,b) from the Examples on function property validation to validate a property:

classdef foo
    properties
        a
        b {mustBeEqualSize(a,b)}
    end
end

However, this gives me an error.

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Answer 1

Jan Siegmund 2020-11-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/647678-how-do-i-use-a-class-property-validation-function-with-a-dynamic-argument#answer_544393

在 MATLAB Online 中打开

The problem is, that MATLAB classes only support constant arguments on property validation.

However function arguments can be validated perfectly fine with dynamic arguments.

So a workaround is to validate the arguments of the constructor:

classdef Foo
    properties
        a
        b
    end
    
    methods
        
        function obj = Foo(a,b)
            arguments
                a
                b {mustBeEqualSize(a,b)}
            end
            obj.a = a;
            obj.b = b;
        end
    end
end