Method requireOrAssertFunction

libsolidity/codegen/YulUtilFunctions.cpp:293–327

}

std::string YulUtilFunctions::requireOrAssertFunction(bool _assert, Type const* _messageType, ASTPointer<Expression const> _stringArgumentExpression)
{
	std::string functionName =
		std::string(_assert ? "assert_helper" : "require_helper") +
		(_messageType ? ("_" + _messageType->identifier()) : "");

	solAssert(!_assert || !_messageType, "Asserts can't have messages!");

	return m_functionCollector.createFunction(functionName, [&]() {
		if (!_messageType)
			return Whiskers(R"(
				function <functionName>(condition) {
					if iszero(condition) { <error> }
				}
			)")
			("error", _assert ? panicFunction(PanicCode::Assert) + "()" : "revert(0, 0)")
			("functionName", functionName)
			.render();

		solAssert(_stringArgumentExpression, "Require with string must have a string argument");
		solAssert(_stringArgumentExpression->annotation().type);
		std::vector<std::string> functionParameterNames = IRVariable(*_stringArgumentExpression).stackSlots();

		return Whiskers(R"(
			function <functionName>(condition <functionParameterNames>) {
				if iszero(condition)
					<revertWithError>
			}
		)")
		("functionName", functionName)
		("revertWithError", revertWithError("Error(string)", {TypeProvider::stringMemory()}, {_stringArgumentExpression}))
		("functionParameterNames", joinHumanReadablePrefixed(functionParameterNames))
		.render();
	});
}

std::string YulUtilFunctions::requireWithErrorFunction(FunctionCall const& errorConstructorCall)
{