Named parameter string formatting in C++

Question

I\'m wondering if there is a library like Boost Format, but which supports named parameters rather than positional ones. This is a common idiom in e.g. Python, where you have a

Answer 1

The fmt library supports named arguments:

print("You clicked {button} at {x},{y}.",
      arg("button", "b1"), arg("x", 50), arg("y", 30));

And as a syntactic sugar you can even (ab)use user-defined literals to pass arguments:

print("You clicked {button} at {x},{y}.",
      "button"_a="b1", "x"_a=50, "y"_a=30);

For brevity the namespace fmt is omitted in the above examples.

Disclaimer: I'm the author of this library.