How do I view the properties of an abstract class?

Question

Aaron Kaw 2022-5-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1717300-how-do-i-view-the-properties-of-an-abstract-class

回答： Steven Lord 2022-5-12

For a class such as

classdef (Abstract) AbstractClassDemo
	properties (Constant)
		one = 1
		two = 'two'
	end
end

I should be using something like

meta.abstractDetails('AbstractClassDemo')

which returns the error

No abstract methods or properties for class AbstractClassDemo or no class AbstractClassDemo.

To confirm to you that AbstractClassDemo is visible and accessible, I run

AbstractClassDemo

which returns

Abstract classes cannot be instantiated. Class 'AbstractClassDemo' is declared as Abstract.

What alternative options do I have? I can't find anything else I can do. Am I doing something wrong above? Should be simple right?

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Answer 1

Steven Lord 2022-5-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1717300-how-do-i-view-the-properties-of-an-abstract-class#answer_962755

在 MATLAB Online 中打开

Call the properties function with the name of the Abstract class as input.

>> properties AbstractClassDemo
Properties for class AbstractClassDemo:
    one
    two

Alternately if you want additional information you could use either the ? operator or the meta.class.fromName function to create the meta.class object for the class. That object has an array of meta.property objects in its PropertyList property.

>> q = meta.class.fromName('AbstractClassDemo');
>> q = ?AbstractClassDemo;
>> propOne = q.PropertyList(1)
propOne = 
  property with properties:
                    Name: 'one'
             Description: ''
     DetailedDescription: ''
*snip the rest of the properties to keep this post short*