Cast slice to bytesn

[rainbreak]

Thanks for your work on this - I'm looking forward to using it when it's stable.

Is it possible to enable functions like this:

function extract (bytes data, uint offset) returns (bytes4) {
    return bytes4(data.slice(offset, offset + 4))
}

i.e. returning a bytesn value type from a slice of bytes?

My current workaround feels clunky:

function extract (bytes data, uint offset) returns (bytes4) {
    uint32 ret = 0;
    for (uint32 i = 0; i < 4; i++) {
        ret += uint32(data[i + offset]) * 2 ** ((3 - i) * 8);
    }
    return (bytes4(ret));
} 

[androlo]

it requires 32 functions since it is 32 bytes types. There is one for byte, and one for bytes32 and some other types in the works (same as the RLP contract has).

Very sorry for the late reply, announcements were off for some reason.

[rainbreak]

No worries. Makes sense. Thanks!