contract C { function f(uint x) public pure returns (uint) { return 2 * x; } function g() public view returns (function (uint) external returns (uint)) { return this.f; } function h(uint x) public returns (uint) { return this.g()(x) + 1; } function t() external view returns ( function(uint) external returns (uint) a, function(uint) external view returns (uint) b) { a = this.f; b = this.f; } } // ==== // ---- // f(uint256): 2 -> 4 // h(uint256): 2 -> 5 // t() -> 0xFDD67305928FCAC8D213D1E47BFA6165CD0B87BB3DE648B0000000000000000, 0xFDD67305928FCAC8D213D1E47BFA6165CD0B87BB3DE648B0000000000000000