Missing C++ Header <_Debug> After Updating Osx Command Line Tools 6.3

Can't compile a C program on a Mac after upgrading to Catalina 10.15

For me adding the following path to CPATH solved the issue:

export CPATH=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include

Error installing/bundling gem unf_ext -v '0.0.6'

It's a bug in the new xcode tools. It broke eventmachine in my case. See Missing C++ header <__debug> after updating OSX Command Line Tools 6.3 for answers with dummy files and reinstallation links. I downgraded to 6.2 and the problem went away.

Unable to install therubyracer on clean install of Yosemite and clean version of ruby

I was able to solve this by re-installing Command Line Tools for XCode 6.2 (instead of those for XCode 6.3).

There's more discussion in Stack Overflow 29529455.

enum to string in modern C++11 / C++14 / C++17 and future C++20

Magic Enum header-only library provides static reflection for enums (to string, from string, iteration) for C++17.

#include <magic_enum.hpp>

enum Color { RED = 2, BLUE = 4, GREEN = 8 };

Color color = Color::RED;
auto color_name = magic_enum::enum_name(color);
// color_name -> "RED"

std::string color_name{"GREEN"};
auto color = magic_enum::enum_cast<Color>(color_name)
if (color.has_value()) {
  // color.value() -> Color::GREEN
};

For more examples check home repository https://github.com/Neargye/magic_enum.

Where is the drawback?

This library uses a compiler-specific hack (based on __PRETTY_FUNCTION__ / __FUNCSIG__), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 9.

Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX].

By default MAGIC_ENUM_RANGE_MIN = -128, MAGIC_ENUM_RANGE_MAX = 128.
If need another range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN and MAGIC_ENUM_RANGE_MAX.
MAGIC_ENUM_RANGE_MIN must be less or equals than 0 and must be greater than INT16_MIN.
MAGIC_ENUM_RANGE_MAX must be greater than 0 and must be less than INT16_MAX.

If need another range for specific enum type, add specialization enum_range for necessary enum type.

#include <magic_enum.hpp>

enum number { one = 100, two = 200, three = 300 };

namespace magic_enum {
template <>
  struct enum_range<number> {
    static constexpr int min = 100;
    static constexpr int max = 300;
};
}