We received a request from our localization team to switch from
printf-style format strings (%s, %u) to format strings with positional
argument support. I've been hoping for a long time to take a dependency
on C++20's std::format, but we're just not somewhere we can do that.
Enter fmt. fmt is _exactly_ the library we need.
Minor comparison:
std::wstring_view world = /* ... */;
auto str{ wil::str_printf<std::wstring>(L"hello %.*s",
gsl::narrow_cast<size_t>(world.size()),
world.data()) };
---
auto str{ fmt::format(L"hello {0}", world) };
If you really want to use the print specifiers:
auto str{ fmt::printf(L"hello %s", world) };
It's got optional compile-time checking for format strings and is
MIT-licensed. Eventually, we should be able to replace fmt:: with std::
and end up pretty much where we left off.
What more could you ask for?
114e462669