这编译得很好（Arduino）：
struct ProgressStore {
unsigned long ProgressStart;
unsigned long LastStored;
uint32_t FirstSectorNr;
};
void IRAM_ATTR ProgressInit(ProgressStore aProgressStore){
}
忽略 IRAM_ATTR，它不再编译（？）：
Verbruiksmeter:116:6: error: variable or field 'ProgressInit' declared void
116 | void ProgressInit(ProgressStore aProgressStore){//, uint32_t SectorNr) {
| ^~~~~~~~~~~~
Verbruiksmeter:116:19: error: 'ProgressStore' was not declared in this scope
116 | void ProgressInit(ProgressStore aProgressStore){//, uint32_t SectorNr) {
| ^~~~~~~~~~~~~