Can I get information of used method arguments validation by meta.class

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Florian Osterloh 2020-3-2

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评论： Thomas Ewald 2023-12-12

Hello,

I would like to collect information about used validation in arguments block of class methods.

Currently I get information about property validation through meta.class,

 mco = ?memmapfile;
 
 findobj(mco, 'Name','Filename' )
ans =
  property with properties:
                   Name: 'Filename'
            Description: ''
    DetailedDescription: ''
              GetAccess: 'public'
              SetAccess: 'public'
              Dependent: 1
               Constant: 0
               Abstract: 0
              Transient: 0
                 Hidden: 0
          GetObservable: 0
          SetObservable: 0
               AbortSet: 0
            NonCopyable: 1
              GetMethod: @C:\Program Files\MATLAB\R2019b\toolbox\matlab\iofun\@memmapfile\memmapfile.m>memmapfile.get.Filename
              SetMethod: @C:\Program Files\MATLAB\R2019b\toolbox\matlab\iofun\@memmapfile\memmapfile.m>memmapfile.set.Filename
             HasDefault: 0
             Validation: [0x0 meta.Validation]
          DefiningClass: [1x1 meta.class]

Here I take the meta.Validation. For example in my custom class:

>> findobj(?MyRectangle, 'Name','length' ).Validation
ans =
  Validation with properties:
                 Class: [1x1 meta.class]
                  Size: [1x0 meta.ArrayDimension]
    ValidatorFunctions: {@mustBeNumeric}

Can I get this information for argument validation in class methods as well? By meta.class ? Does anybody know how to do it?

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TADA 2021-12-27

在 MATLAB Online 中打开

to make things worse, when I add the arguments block, metaclass no longer identifies the argumets list at all:

classdef Class
    methods
        function z = foo(obj, x, y)
            z = x*y;
        end
    end
end

mc = ?Class;
mf = mc.MethodList(strcmp({mc.MethodList.Name}, 'foo'));
mf.InputNames
        ans =
        
          3×1 cell array
        
            {'obj'}
            {'x'  }
            {'y'  }

When I add the arguments validatin block:

classdef Class
    methods
        function z = foo(obj, x, y)
            arguments
                obj
                x {mustBeNumeric(x)}
                y {mustBeNumeric(y)}
            end
            z = x*y;
        end
    end
end

mc = ?Class;
mf = mc.MethodList(strcmp({mc.MethodList.Name}, 'foo'));
mf.InputNames
ans =
  1×1 cell array
    {'varargin'}

Thomas Ewald 2023-12-12

Hello!

I am currently dealing with the same problem. Adding an argument validation results in the InputNames property returning only 'varargin'. Has some solution been found yet?

All the best! TE

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