Here is my personal implementation of the Basic interpreter, served as the submission of the project of SJTU SE course - software basic practice (SE2308, or SE1301 originally).
Here is the original project document.
QBasic is a demanding, annoying and ugly-designed project. Some requirements in the doc are either overwhelming or useless, which may waste a lot of time.
To dig some entertainment, though, I implement the interpreter with a strict client-server model. Specifically, you can see two subfolders in the src folder: backend and frontend. The backend of the interpreter is implemented with ANTLR4, a elaborated-designed parser generator. The frontend depends on Qt6.
You can even build the backend separately as a library that is independent with Qt. That's the key feature of my implementation.
Another feature is that the backend is well-tested. You can check the test cases in test folder.
Make sure you've installed cmake and the Qt library. The CMakefile.txt uses find_package to find Qt. You can also use the environment variable CMAKE_PREFIX_PATH to tell cmake where to find the package.
# For configuration, ANTLR4 project will be downloaded,
# so it may take some time.
# Try to open your proxy to accelerate.
cmake -S . -B build
cmake --build build --target allYou can run the test cases:
cd build/test # you need to `cd` to this directory
./test_editor
[doctest] doctest version is "2.4.11"
[doctest] run with "--help" for options
===============================================================================
[doctest] test cases: 2 | 2 passed | 0 failed | 0 skipped
[doctest] assertions: 14 | 14 passed | 0 failed |
[doctest] Status: SUCCESS!
./test_interpreter
[doctest] doctest version is "2.4.11"
[doctest] run with "--help" for options
===============================================================================
[doctest] test cases: 2 | 2 passed | 0 failed | 0 skipped
[doctest] assertions: 14 | 14 passed | 0 failed |
[doctest] Status: SUCCESS!The APP is located in build/app.
MIT.