pragma abicoder v2; contract C { struct S { uint256 a; uint256[2] b; uint256 c; } function f(S calldata s) external pure returns (uint256 a, uint256 b0, uint256 b1, uint256 c) { a = s.a; b0 = s.b[0]; b1 = s.b[1]; c = s.c; } } // ---- // f((uint256,uint256[2],uint256)): 42, 1, 2, 23 -> 42, 1, 2, 23