[IGNITE-6592] Describe Ignite C++ pointer reading and writing semantics

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2
• Fix Version/s: 2.3
• Component/s: documentation
• Assignee: Prachi Garg
• Reporter: Igor Sapego
• Created: 10/Oct/17 15:33
• Updated: 19/Oct/17 19:41
• Resolved: 19/Oct/17 19:41

Description

Need to describe how user can read and write nullable values using pointer semantic in Ignite C++:

// One can write null value like this:
writer.WriteObject<SomeObject*>(nullptr);
// And read it like this:
std::unique_ptr<SomeObject> nullableVal = reader.ReadObject<SomeObject*>();
if (nullableVal) {
  // Processing...
}