Unicode support: automatically widen on windows when option is assigned a std::filesystem::path #875
Description
I've seen #804, and it does widen in check_path for the CLI:ExistingXXXX validator. https://github.com/CLIUtils/CLI11/pull/804/files#diff-212772a3245e02e1fb8bf60ed69b5c89eb1b4f109e459b3294ff1edbd6c6aa27R131
Assuming this MCVE
#include <CLI/CLI.hpp>
#include <fmt/format.h>
#include <fmt/std.h> // Formatting std::filesystem::path
#include <filesystem>
namespace fs = std::filesystem;
int main(int argc, char** argv) {
CLI::App app("test path");
fs::path dir;
app.add_option("DIR", dir, "Directory")->check(CLI::ExistingDirectory);
CLI11_PARSE(app);
fmt::print("{} - {}\n", dir, fs::exists(dir));
}In the resulting executable directory:
mkdir voilà
./test voilàIdeally that would work on both unix and windows.
On windows, the CLI:ExistingDirectory is perfectly fine since it does widden when checking, but the resulting fs::path dir doesn't exist and it prints "térmica" - false