With a bit of fiddeling you can use every kind of bracket to basically make function calls in c++

Here are the links to the snippets, all compile and run

Rust: https://godbolt.org/z/bM3d7bG14

OCaml: https://godbolt.org/z/17oMv83zx

C++: https://godbolt.org/z/9Y3WfoE1W