Enums

Question

I read that using enum class, compiler can't use an enum class in all scopes however using the statement "using enum Enum_Name". You can use ur enumerators from Enum_Name in that scope... So why my code doesn't work?
https://code.sololearn.com/ci0I90tI5x7q/?ref=app

Answer 1

Fix it and it will work:

enum Color
{
black,
red,
blue,
};

constexpr std::string_view getColor(Color color)
{
switch (color)
{
case black: return "black";
case red: return "red";
case blue: return "blue";
default: return "???";
}
}

Answer 2

Solo thanks but I don't want to use unscope enumeration... I want to use scope enumeration and want to know why my statement "using enum Color" doesn't work in my case

Answer 3

enum class Color
{
black,
red,
blue,
};

constexpr std::string_view getColor(Color color)
{
switch (color)
{
case Color::black: return "black";
case Color::red: return "red";
case Color::blue: return "blue";
default: return "???";
}
}

Answer 4

using-enum declarations are a c++20 feature. SoloLearn currently runs C++17