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Does the type string in OCaml support utf8?
Or what library I should use for utf8 string?
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Yes, because “unicode string” is not really a meaningful concept. You are mixing a container ( string , aka an array of bytes) with a standard for describing human scripts ( unicode ) that can be potentially encoded inside strings with a specific encoding like utf-8 or utf-16 .
UTF-8 is a Unicode character encoding method. This means that UTF-8 takes the code point for a given Unicode character and translates it into a string of binary. It also does the reverse, reading in binary digits and converting them back to characters.
This error is created when the uploaded file is not in a UTF-8 format. UTF-8 is the dominant character encoding format on the World Wide Web. This error occurs because the software you are using saves the file in a different type of encoding, such as ISO-8859, instead of UTF-8.
The string type of OCaml consists of a series of 8-bit bytes in essence. You can store a UTF-8 value in a string, and I have often done this. However, there's no built-in support for handling them. A good library for handling Unicode in OCaml (so I've heard) is Camomile.
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There is also Uutf if you're looking for just unicode conversion.
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