Editor code completion for MATLAB Handle classes?

Question

John 2014-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/167303-editor-code-completion-for-matlab-handle-classes

评论： per isakson 2014-12-20

When working with the definition for a handle class. Can the code completion feature see the methods and properties of the class?

classdef A < handle
   properties
      a;
      b;
   end
     methods
        function obj = A()
           obj.b = 1; %Code Editor does not see the property b when I type in the period after obj.
        end
     end
  end

Code Editor does not see the property b when I type in the period after obj.

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Answer 1

per isakson 2014-12-20

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编辑：per isakson 2014-12-20

在 MATLAB Online 中打开

I'm not sure what's in the documentation. I use R2013a and the code below. I work in "break mode", similar to In-situ Coding.

In "break mode" code completion works both with constructors and ordinary methods.

    classdef A < handle
        properties
            a
            b
        end
        methods
            function obj = A()
            end
            function  foo( obj )
            end
        end
    end

Coding

&nbsp

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John 2014-12-20

I'll keep this thread open for a little while and let other suggestions be posted. If I see no better suggestions than the one by per isakson , I will accept his answer. It seems to be a good solution.

per isakson 2014-12-20

Yes, it requires a preference setting (see below).
Yes, the "No Completion" in the third example is because not in "break mode"; no breakpoint and no little green arrow.

A problem to provide Tab Completion when the variables are not defined, i.e. based on the text, is that there are syntax errors most of the time when the code is being written.

I've problems with the words, that's why I use so few. In the documentation I find the terms

Tab completion not "Code completion"
Debugging session I wrote "break mode"&nbsp

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Answer 2

Matt J 2014-12-20

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编辑：Matt J 2014-12-20

Inside most class methods, the editor would have no way of knowing in advance that "obj" is intended to be an object of the class. The constructor is an exception, because a class member is the only legal output argument of class constructors. But I can imagine the editor developers simply not investing in special treatment for constructors, when it's a convenience that can't be given anywhere else.