src/base/features/attributes.hpp

#pragma once

// Indicate that the fall-through from the preceding case label is intentional.
#define FALL [[fallthrough]]

// Indicate that the entity might be unused.
#define UNUSED [[maybe_unused]]

// Indicate that the function does not return.
#define NORETURN [[noreturn]]

// Indicate that the paths of execution including the statement are more or
// less likely respectively than other paths that don't include it.
#define LIKELY [[likely]]
#define UNLIKELY [[unlikely]]