It tries to imitate the functionality of the questionmark (?) operator in C++ by using a macro that uses the gcc extension https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html

This allows to create exceptionless code with non-intrusive error-as-value that unlike Exceptions, makes it clear which kinds of error a function can generate and forces you to handle (or ignore) them.

The ? operator translates to *expect* To handle the errors I introduce *match* which allows to easily visit the contents of the result or any std::variant (you can use it to imitate rust enums)

You can view an example of this project used in a "real way" in compiler-explorer:

Simplified error types to just be a string: https://compiler-explorer.com/z/6j3866E7W

Multiple structs as error types: https://compiler-explorer.com/z/encbf5f43

Feel free to give feedback or contribute to the project!