Please explain the difference between bsoncxx::document::value and bsoncxx::document::view. Is view just a proxy to value class?
bsoncxx: document::view vs document::value
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In the bsoncxx library,
valuesrepresent ownership of an immutable resource, but not the ability to inspect the owned resource. To inspect the owned resource, you obtain aviewfrom thevalue. Theviewandvaluehere are analogous to the relationship betweenstd::stringandstd::string_view. By separating the aspects of ownership from inspection, we can have a cheap type used for APIs that only need to look at data, and a more expensive API for when we need to make copies or take over ownership of resources.