Need wstring？

[hexianzhi]

When wchar_t.string 's value pass to a function with wstring parameter, the parameter will not print.

Example:
node.js code：

var MyLibrary = ffi.Library(mathPath, {
  'getPassword': [  ref.types.void, [wstring]]
})
const bb = MyLibrary.getPassword('123456')

cpp code:

void getPassword (wstring s1) {
	std::wcout.imbue(std::locale("chs"));
        // s1 is empty
	std::wcout << "s1: " << s1 << L' ';
}

The result is: s1:
Expect result : s1:123456

But if parameter s1 is w_char* ，the '123456' string will show，as void getPassword(wchar_t *s1)

Can we get a wstring type?