#4271: Use OS independent utf8 string representation of std_fs::path at to_j…

[zel1b08a]

According to #4271.

std::filesystem::path::string method uses system-dependent native format. String type is always UTF8 format, by the json docs. So we force encoding to be UTF8.

[github-actions]

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[nlohmann]

Please run make amalgamate with Astyle (http://astyle.sourceforge.net) 3.1 installed.

[nlohmann]

Note that from C++20, u8string will return std::u8string instead of std::string - I am not sure if this assignment works in this case.

[zel1b08a]

I see the copy with reinterpret_cast to char* there only..)

[nlohmann]

I saw a remark on cppreference.com

[zel1b08a]

I mean the u8string to string conversion here in that issue

[nlohmann]

The exception could come from the conversion of std::u8string to JSON. As std::u8string is not supported, the string is treated like a sequence of bytes and converted to an array.

[coveralls]

coverage: 99.649%. remained the same
when pulling c859d64 on zel1b08a:patch-1
into 9f60e85 on nlohmann:develop.

[github-actions]

🔴 Amalgamation check failed! 🔴

The source code has not been amalgamated. @zel1b08a
Please read and follow the Contribution Guidelines.

[github-actions]

🔴 Amalgamation check failed! 🔴

The source code has not been amalgamated. @zel1b08a
Please read and follow the Contribution Guidelines.