Method readFromStorageReferenceType

libsolidity/codegen/YulUtilFunctions.cpp:2876–2927

}

std::string YulUtilFunctions::readFromStorageReferenceType(Type const& _type)
{
	if (auto const* arrayType = dynamic_cast<ArrayType const*>(&_type))
	{
		solAssert(arrayType->dataStoredIn(DataLocation::Memory), "");
		return copyArrayFromStorageToMemoryFunction(
			dynamic_cast<ArrayType const&>(*arrayType->copyForLocation(DataLocation::Storage, false)),
			*arrayType
		);
	}
	solAssert(_type.category() == Type::Category::Struct, "");

	std::string functionName = "read_from_storage_reference_type_" + _type.identifier();

	auto const& structType = dynamic_cast<StructType const&>(_type);
	solAssert(structType.location() == DataLocation::Memory, "");
	MemberList::MemberMap structMembers = structType.nativeMembers(nullptr);
	std::vector<std::map<std::string, std::string>> memberSetValues(structMembers.size());
	for (size_t i = 0; i < structMembers.size(); ++i)
	{
		auto const& [memberSlotDiff, memberStorageOffset] = structType.storageOffsetsOfMember(structMembers[i].name);
		solAssert(structMembers[i].type->isValueType() || memberStorageOffset == 0, "");

		memberSetValues[i]["setMember"] = Whiskers(R"(
			{
				let <memberValues> := <readFromStorage>(add(slot, <memberSlotDiff>))
				<writeToMemory>(add(value, <memberMemoryOffset>), <memberValues>)
			}
		)")
		("memberValues", suffixedVariableNameList("memberValue_", 0, structMembers[i].type->stackItems().size()))
		("memberMemoryOffset", structType.memoryOffsetOfMember(structMembers[i].name).str())
		("memberSlotDiff",  memberSlotDiff.str())
		("readFromStorage", readFromStorage(*structMembers[i].type, memberStorageOffset, true, VariableDeclaration::Location::Unspecified))
		("writeToMemory", writeToMemoryFunction(*structMembers[i].type))
		.render();
	}

	return m_functionCollector.createFunction(functionName, [&] {
		return Whiskers(R"(
			function <functionName>(slot) -> value {
				value := <allocStruct>()
				<#member>
					<setMember>
				</member>
			}
		)")
		("functionName", functionName)
		("allocStruct", allocateMemoryStructFunction(structType))
		("member", memberSetValues)
		.render();
	});
}

std::string YulUtilFunctions::readFromMemory(Type const& _type)
{