I'm not sure how this line compiled at all with earlier standards on Linux (where char_type is wchar_t). How wchar_t was outputted into char stream?
It produced the integer value before C++20:
https://en.cppreference.com/w/cpp/io/basic_ostream/operator_ltlt2
So, the patch attached here should work as in earlier standards.
Yuriy
diff --git a/src/mathed/MathParser.cpp b/src/mathed/MathParser.cpp
index dd43dd9eac..478e906308 100644
--- a/src/mathed/MathParser.cpp
+++ b/src/mathed/MathParser.cpp
@@ -370,9 +370,9 @@ ostream & operator<<(ostream & os, Token const & t)
os << '\\' << to_utf8(cs);
}
else if (t.cat() == catLetter)
- os << t.character();
+ os << static_cast<uint32_t>(t.character());
else
- os << '[' << t.character() << ',' << t.cat() << ']';
+ os << '[' << static_cast<uint32_t>(t.character()) << ',' <<
t.cat() << ']';
return os;
}
--
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