void ComponentStorage::printError(const std::string& message) {
cout << "Fatal injection error: " << message << endl;
cout << "Registered types:" << endl;
for (auto typePair : typeRegistry) {
std::cout << demangleTypeName(typePair.first.name()) << std::endl;
}
}
void* ComponentStorage::getPtr(TypeIndex typeIndex) {
auto itr = typeRegistry.find(typeIndex);
FruitCheck(itr != typeRegistry.end(), [=](){return "attempting to getPtr() on a non-registered type: " + demangleTypeName(typeIndex.name());});
TypeInfo& typeInfo = itr->second;
if (typeInfo.storedSingleton == nullptr) {
FruitCheck(bool(typeInfo.create), [=](){return "attempting to create an instance for the type " + demangleTypeName(typeIndex.name()) + " but there is no create operation";});
std::tie(typeInfo.storedSingleton, typeInfo.destroy) = typeInfo.create(*this, typeInfo.createArgument);
createdSingletons.push_back(typeIndex);
}
void* p = typeInfo.storedSingleton;
// This can happen if the user-supplied provider returns nullptr.
check(p != nullptr, [=](){return "attempting to get an instance for the type " + demangleTypeName(typeIndex.name()) + " but got nullptr";});
return p;
}
inline std::string demangleTypeName(T& type) {
return demangleTypeName(typeid(type).name());
}
