#include "config.hh" #include "primops.hh" #include <stdlib.h> using namespace nix; #ifdef MISSING_REFERENCE extern void meow(); #else #define meow() {} #endif struct MySettings : Config { Setting<bool> settingSet{this, false, "setting-set", "Whether the plugin-defined setting was set"}; }; MySettings mySettings; static GlobalConfig::Register rs(&mySettings); [[gnu::used, gnu::unused, gnu::retain]] static void maybeRequireMeowForDlopen() { meow(); } static void prim_anotherNull (EvalState & state, const PosIdx pos, Value ** args, Value & v) { if (mySettings.settingSet) v.mkNull(); else v.mkBool(false); } static RegisterPrimOp rp({ .name = "anotherNull", .arity = 0, .fun = prim_anotherNull, });