Change colour_t to be a strongly typed structure

Make RGB default of `colour_t`
Distinguish RGB and ARGB colors by type and colour_traits
Add `_colour` and `_argb` colour user-defined literals
Add `OpenVic::utility::unreachable`

1 files changed, 14 insertions, 0 deletions

diff --git a/src/openvic-simulation/utility/Utility.hpp b/src/openvic-simulation/utility/Utility.hpp
new file mode 100644
index 0000000..e8d7205
--- /dev/null
+++ b/src/openvic-simulation/utility/Utility.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+namespace OpenVic::utility {
+	[[noreturn]] inline void unreachable() {
+		// Uses compiler specific extensions if possible.
+		// Even if no extension is used, undefined behavior is still raised by
+		// an empty function body and the noreturn attribute.
+#ifdef __GNUC__ // GCC, Clang, ICC
+		__builtin_unreachable();
+#elif defined(_MSC_VER) // MSVC
+		__assume(false);
+#endif
+	}
+}