contract test {
function can_be_slice() public {
// v can just be a pointer to constant memory and an a length indicator
string v = "Hello, World!";
print(v);
}
function must_be_vector() public {
// if v is a vector, then it needs to allocated and default value copied.
string v = "Hello, World!";
// bs is copied by reference is now modifyable
bytes bs = bytes(v);
bs[1] = 97;
print(v);
}
}