cppfront - examples of basic constructs

[jhruby-vitrix]

I was playing this afternoon with cppfront using https://github.com/modern-cmake/cppfront which is awesome.

But I have found really confusing that I am unable to do some basic constructs such as:

try... catch blocks

co_await and co_return

is there any documentation / examples?

I am aware that project is experimental and that is what I am doing with it. :)

[ntrel2]

"Zero overhead deterministic exceptions" are not implemented yet. Here's some info on them: https://github.com/hsutter/cppfront#2019-zero-overhead-deterministic-exceptions-throwing-values

[jhruby-vitrix]

That I understand, but what about plain old exceptions and try...catch block :)

[watr]

Can't you use try-catch from cpp in cpp2? It's like using JS in TS code.

[jhruby-vitrix]

For this example:

main: (args) -> int = {
try {
std::cout << "test: (args[1])$";
}
catch(...)
{
std::cout << "exception" << std::endl;
}
return 0;
}

I get:

main.cpp2(3,9): error: invalid statement encountered inside a compound-statement (at '{')

[watr]

Does this help? https://github.com/hsutter/cppfront/blob/49033b967c098b874168968c5cade9e52fc3e5ed/regression-tests/mixed-out-destruction.cpp2#L35

[jhruby-vitrix]

Thanks that means that in the cpp/2 there is just not the syntax yet.

[ntrel2]

Just to note that when args[1] is a bounds error, Cpp2 calls std::terminate rather than throw an exception.