Compiler-specific markup used to tell the compiler than the return value of a function should not be discarded without examining it.

Overridable: Define before inclusion.

Default: To [[nodiscard]] if on C++ 17 or higher, __attribute__((warn_unused_result)) if on clang, SAL _Must_inspect_result_ if on MSVC, otherwise nothing.

Header: <boost/outcome/config.hpp>