If you're using Emacs Flycheck when coding D the following snippet

    pragma(msg, __FILE__, "(", __LINE__, ",1): Info: ", EXPRS...);

may come useful.

This inserts a preabmle before `EXPRS...` that is recognized by Flycheck as a compiler info diagnostics. Your message(s) `EXRPS...` will now show up inside the *Flycheck errors* buffer.

For instance, if you want to know the type of some variable `x` you can use

    auto x = f(); // returns some complex type
    pragma(msg, __FILE__, "(", __LINE__, ",1): Info: ", typeof(x));