Chem::FormatWriter::MultiEntry(T)
The MultiEntry mixin provides an interface for writing in a file
format that can hold a variable number of objects.
It holds the total number of entries (#total_entries) and
reimplements the << operator to track how many of them has been
written so far.
Constructors
new(io : IO, total_entries : Int32 | Nil = nil, sync_close : Bool = false)
Creates a new object from the given io. If the number of entries
to be written is known, pass total_entries, otherwise set it to
nil.
Instance methods
<<(obj : T) : self
Writes obj to the IO. It keeps count of the number of entries
written to the IO.
multi?
Returns true if multiple entries or an indeterminate number of
entries are to be written, else false.