mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
31 lines
1.3 KiB
Solidity
31 lines
1.3 KiB
Solidity
library L {
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function f(uint256 x) external returns (uint) { return x; }
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function g(uint256[] storage s) external returns (uint) { return s.length; }
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function h(uint256[] memory m) public returns (uint) { return m.length; }
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}
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contract C {
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uint256[] s;
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constructor() public { while (s.length < 42) s.push(0); }
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function f() public returns (bool, bool, uint256) {
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(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.f.selector, 7));
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return (L.f.selector == bytes4(keccak256("f(uint256)")), success, abi.decode(data, (uint256)));
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}
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function g() public returns (bool, bool, uint256) {
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uint256 s_ptr;
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assembly { s_ptr := s_slot }
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(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.g.selector, s_ptr));
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return (L.g.selector == bytes4(keccak256("g(uint256[] storage)")), success, abi.decode(data, (uint256)));
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}
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function h() public returns (bool, bool, uint256) {
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(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.h.selector, new uint256[](23)));
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return (L.h.selector == bytes4(keccak256("h(uint256[])")), success, abi.decode(data, (uint256)));
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}
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}
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// ====
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// EVMVersion: >homestead
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// ----
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// library: L
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// f() -> true, true, 7
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// g() -> true, true, 42
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// h() -> true, true, 23
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