solidity/test/libsolidity/semanticTests/functionCall/gas_and_value_brace_syntax.sol

contract helper {
    bool flag;

    function getBalance() payable public returns(uint256 myBalance) {
        return address(this).balance;
    }

    function setFlag() public {
        flag = true;
    }

    function getFlag() public returns(bool fl) {
        return flag;
    }
}
contract test {
    helper h;
    constructor() public payable {
        h = new helper();
    }

    function sendAmount(uint amount) public payable returns(uint256 bal) {
        return h.getBalance{value: amount}();
    }

    function outOfGas() public returns(bool ret) {
        h.setFlag {
            gas: 2
        }(); // should fail due to OOG
        return true;
    }

    function checkState() public returns(bool flagAfter, uint myBal) {
        flagAfter = h.getFlag();
        myBal = address(this).balance;
    }
}

// ----
// constructor(), 20 wei ->
// sendAmount(uint256): 5 -> 5
// outOfGas() -> FAILURE # call to helper should not succeed but amount should be transferred anyway #
// checkState() -> false, 15