Method mappingIndexAccessFunction

libsolidity/codegen/YulUtilFunctions.cpp:2739–2777

}

std::string YulUtilFunctions::mappingIndexAccessFunction(MappingType const& _mappingType, Type const& _keyType)
{
	std::string functionName = "mapping_index_access_" + _mappingType.identifier() + "_of_" + _keyType.identifier();
	return m_functionCollector.createFunction(functionName, [&]() {
		if (_mappingType.keyType()->isDynamicallySized())
			return Whiskers(R"(
				function <functionName>(slot <?+key>,</+key> <key>) -> dataSlot {
					dataSlot := <hash>(<key> <?+key>,</+key> slot)
				}
			)")
			("functionName", functionName)
			("key", suffixedVariableNameList("key_", 0, _keyType.sizeOnStack()))
			("hash", packedHashFunction(
				{&_keyType, TypeProvider::uint256()},
				{_mappingType.keyType(), TypeProvider::uint256()}
			))
			.render();
		else
		{
			solAssert(CompilerUtils::freeMemoryPointer >= 0x40, "");
			solAssert(!_mappingType.keyType()->isDynamicallyEncoded(), "");
			solAssert(_mappingType.keyType()->calldataEncodedSize(false) <= 0x20, "");
			Whiskers templ(R"(
				function <functionName>(slot <key>) -> dataSlot {
					mstore(0, <convertedKey>)
					mstore(0x20, slot)
					dataSlot := keccak256(0, 0x40)
				}
			)");
			templ("functionName", functionName);
			templ("key", _keyType.sizeOnStack() == 1 ? ", key" : "");
			if (_keyType.sizeOnStack() == 0)
				templ("convertedKey", conversionFunction(_keyType, *_mappingType.keyType()) + "()");
			else
				templ("convertedKey", conversionFunction(_keyType, *_mappingType.keyType()) + "(key)");
			return templ.render();
		}
	});
}

std::string YulUtilFunctions::readFromStorage(
	Type const& _type,