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How to convert char* into std::u8string?

Intro

If I catch an exception, I want to convert the error message, which is returned as a C-style string by the what() method, into a std::u8string (a UTF-8 string). For example: std::u8string(error.what());

Problem

How can I convert a char* into a std::u8string?

Additional Information

  • I only catch exceptions from the standard library, boost and eigen.
  • My application is Windows dependent, so the solution doesn't need to be portable.
like image 892
Dawid Avatar asked Sep 03 '25 17:09

Dawid


1 Answers

You can use the constructor that takes a beginning and an ending iterator for the sequence that defines the string.

#include <cstring>

// ...

auto cstr=error.what();

std::u8string str{cstr, cstr+strlen(cstr)};
like image 145
Sam Varshavchik Avatar answered Sep 05 '25 05:09

Sam Varshavchik