function output = myFunction(input1,input2)
  arguments (Input)
    input1 double {mustBeLessThan(input1,10)} = 5
    input2 double {mustBeGreaterThan(input2,1)} = 2
  end
  arguments (Output)
    output integer
  end
  output = input1 + input2;
  output = int(output);
end

Starting in R2022b the legacy @ syntax has changed from a warning to an error. Classes that use the legacy syntax generate a run-time error and no longer run.

For what its worth, I am still getting that same “undocumented syntax” warning in 2022a. I really hope they don’t create another breaking change…

classdef MyClass
    properties
        prop@double scalar = 3;
    end
end

runs fine in R2019a, but produces a warning in R2019b:

Warning: Class 'MyClass' uses an undocumented syntax to restrict property values. 
Use property validation syntax instead. This warning will become an error in a future release.

@Marshall – perhaps you can create a new class that inherits Simulink.ConfigSet and adds nothing to it, whose only benefit is the fact that it does not have a dot in its class name:

classdef Simulink_ConfigSet < Simulink.ConfigSet
end

Then you can simply use the new class name:

configset@Simulink_ConfigSet scalar

configset@Simulink.ConfigSet scalar;

The ‘.’ in there messes up the syntax parser, and I can’t figure out how to get around this.

I agree with your point. I can think of many simple solutions to type-specification without breaking users’ code all the while sticking to the convention of having the type to the left of the variable. For example, specifying the type in brackets to the left of the property (i.e. myProp), or a thousand other ways. Another lacking feature is the ability to specify type when adding a property dynamically via “addprop”.

@Adam – see my response in detail here: http://undocumentedmatlab.com/blog/setting-class-property-types-2

http://www.mathworks.com/help/matlab/matlab_oop/defining-properties.html

Simply add the “complex” attribute:

classdef test_mcos
    properties
        value@double scalar complex = 1 + 2i
    end
end

>> t = test_mcos
t = 
  test_mcos with properties:
    value: 1 +    2i