Hi Christoph Harrer,
To my understanding, you are facing the “code suggestions” issue in the command window of MATLAB while using “argument validation” block in the MATLAB class.
I tried reproducing the same in MATLAB R2019b version, and it worked fine with proper code suggestions. I also tried reproducing it in MATLAB R2024a version, there as well it displayed code suggestion correctly.
To fix this issue, you can update your MATLAB to R2019b or later versions, this will resolve the issue.
Attaching the MathWorks official website URL to download the newer version of MATLAB –
A possible workaround to solve this issue can be writing “custom validation methods” which will then display the code suggestions correctly in command window.
Here is a MATLAB Class with “custom argument validation” for your reference –
classdef TestClass
properties
Value
end
methods
function obj = TestClass(val)
if nargin > 0
obj.Value = val;
end
end
function result = addValue(obj, increment)
% Perform input validation manually
if ~isscalar(increment) || ~isnumeric(increment) || increment <= 0
error('Increment must be a positive scalar number');
end
result = obj.Value + increment;
end
function result = multiplyValue(obj, factor)
result = obj.Value * factor;
end
end
end
Attaching the documentation of “Function Argument Validation” as well for reference –
