cerc-io/solidity
11
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add selector member to public and external library functions.

Browse Source
This commit is contained in:
Daniel Kirchner
2019-11-15 16:12:29 +01:00
parent 6a993152d5
commit a0ae36ba70
13 changed files with 249 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/libsolidity/semanticTests/libraries/library_function_selectors.sol
+30
View File
@@ -0,0 +1,30 @@
library L {
function f(uint256 x) external returns (uint) { return x; }
function g(uint256[] storage s) external returns (uint) { return s.length; }
function h(uint256[] memory m) public returns (uint) { return m.length; }
}
contract C {
uint256[] s;
constructor() public { while (s.length < 42) s.push(0); }
function f() public returns (bool, bool, uint256) {
(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.f.selector, 7));
return (L.f.selector == bytes4(keccak256("f(uint256)")), success, abi.decode(data, (uint256)));
}
function g() public returns (bool, bool, uint256) {
uint256 s_ptr;
assembly { s_ptr := s_slot }
(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.g.selector, s_ptr));
return (L.g.selector == bytes4(keccak256("g(uint256[] storage)")), success, abi.decode(data, (uint256)));
}
function h() public returns (bool, bool, uint256) {
(bool success, bytes memory data) = address(L).delegatecall(abi.encodeWithSelector(L.h.selector, new uint256[](23)));
return (L.h.selector == bytes4(keccak256("h(uint256[])")), success, abi.decode(data, (uint256)));
}
}
// ====
// EVMVersion: >homestead
// ----
// library: L
// f() -> true, true, 7
// g() -> true, true, 42
// h() -> true, true, 23