solidity/test/libsolidity/semanticTests/libraries/library_delegatecall_guard_view_needed.sol

33 lines
988 B
Solidity

library L {
function f(uint256[] storage x) public view returns (uint256) {
return x.length;
}
}
contract C {
uint256[] y;
string x;
constructor() public { y.push(42); }
function f() public view returns (uint256) {
return L.f(y);
}
function g() public returns (bool, uint256) {
uint256 ys;
assembly { ys := y_slot }
(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.f.selector, ys));
return (success, success ? abi.decode(data,(uint256)) : 0);
}
function h() public returns (bool, uint256) {
uint256 ys;
assembly { ys := y_slot }
(bool success, bytes memory data) = address(L).call(abi.encodeWithSelector(L.f.selector, ys));
return (success, success ? abi.decode(data,(uint256)) : 0);
}
}
// ====
// EVMVersion: >homestead
// ----
// library: L
// f() -> 1
// g() -> true, 1
// h() -> true, 0 # this is bad - this should fail! #