Python string -> nb?

[nschloe]

Follow-up on #309: How to pass Python strings to nb functions? The following Pybind11 function accepts a Python string:

void
foobar(const std::string & input_data) {
  // ...
}

but gives

TypeError: foobar(): incompatible function arguments. The following argument types are supported:
1. foobar(string: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) -> bytes

in nb.

Any hints?

[wjakob]

You probably forgot to #include the STL type caster for strings. See the "Why another binding library" part of the docs for more detail on why those aren't included anymore.

[j-faria]

Sorry for hijacking this thread but I have a very related question.
I was trying to bind two overloaded C++ functions like

void foobar(std::string s);
void foobar(std::vector<std::string> s);

and I noticed that nanobind always seems to call the second one, even when passed a single Python string. In that case, it builds a vector containing the individual characters. Is there a way to avoid this?

(I'm including both <nanobind/stl/string.h> and <nanobind/stl/vector.h> in case that matters)

[wjakob]

That's something I forgot about (pybind11 is more strict here). Fixed in 7e4a88b