How to compile functions that are in a package folder (i.e. has the + prefix)?

Question

Jessee 2018-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/407914-how-to-compile-functions-that-are-in-a-package-folder-i-e-has-the-prefix

评论： Jessee 2018-7-2

I have MATLAB code that has been organized into namespaces, +myPackage/myFunction.m. When I try to compile this function to a Java Package with Compiler SDK (2018a) app, I get an error with the following log file:

mcc -W 'java:myNamespace,myClass' -T link:lib -d C:\path_to_project\my_proj\for_testing class{learn:C:\path_to_project\+myPackage\myFunction.m} 
Could not determine type of the MATLAB file 'myFunction.m'. Please make sure that you are compiling MATLAB Program files.

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Answer 1

Matthew Esch 2018-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/407914-how-to-compile-functions-that-are-in-a-package-folder-i-e-has-the-prefix#answer_327170

编辑：Matthew Esch 2018-7-2

Good Morning Jessee,

This is a known limitation our developers are considering for a future release. MATLAB files in packages can be compiled successfully as dependencies, however they cannot be used as exported functions. I apologize for the inconvenience this has caused.

Consider moving the functions you want to compile to another non-package folder. Alternatively, if the "main" file you would like to compile is in the package:

Create a new script outside of any package directories
Call the package function from the new script (>> mypackage.myfile)
Select the new script as the main compilation file.

If you want to access a function through Namespace in deployed Java package, instead of putting MATLAB functions in packages you can leverage "deploytool". It has the capability to generate Java Libraries with a specific namespace.

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Jessee 2018-7-2

Creating a wrapper main file that is outside of a package folder worked for me. I liked that solutions best since it didn't require modifying the code that is inside the package.

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