dqml | A simple live coding environment for QML | State Container library
kandi X-RAY | dqml Summary
kandi X-RAY | dqml Summary
A simple live coding environment for QML. Will track the directory where file.qml is located and continuously update the view depending on changes in the filesystem when qmlfiles and images there are changed.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of dqml
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QUESTION
There is a page about C++ interfacing at D wiki - https://dlang.org/spec/cpp_interface.html
It says you can link to C++ code but cant link to special methods including constructors, destructors and operators overloads because of object's lifetime issues. It's suggested to either use a wrapper (and construct objects on C/C++ side) or reimplement constructor with D. Both ways require a lot of work to be done and sometimes can be impossible. This feels as a huge problem if you want to use some C++ library in your D program: for example, you want to use Qt's QML and can define needed classes to use with extern(C++)...
but then you stuck with a constructors and lots of wrappers (like dqml
project do) or ported code.
But there is a way that looks working. Simple example:
...ANSWER
Answered 2017-Sep-11 at 12:16The problem is that C++ and D constructors and destructors do similar things in a different order and at different times.
- Memory is initialized before a D constructor is called. The C++ constructor clears the memory by itself.
- The C++ destructor is called when the object goes out of scope. In D the garbage collector calls the destructor.
This can easily result in trouble when you start mixing the class hierarchy between C++ and D.
But in the simple case of your example (only ctor called, no inheritance mix) there should be no problem.
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