Now that you understand how Slice objects are used, let's go back to the simple Put and Get operations. Binary values can be stored just the same as string values, remembering a std::string value can be regarded, such as Slice as containing just data bytes and a length. The difference is that a std::string retains ownership of its bytes and so is a safe container for binary data. In the following testBin() sample we create a Slice object with a pointer and length of an arbitrary binary struct, and do the opposite to get the binary struct back out of the std::string value returned from Get:
struct binValues {
int intVal;
double realVal;
};
binValues b = {-99, 3.14};
Slice binSlice((const char*)&b, sizeof(binValues) );
assert( db->Put(WriteOptions(), "BinSample", binSlice).ok() );
std::string binRead;
assert( db->Get(ReadOptions(), "BinSample", &binRead).ok() );
// treat the std::string as a container for arbitary...