Return a reference to the map entry at the specified position.
Declared in <bdld_datum.h>
DatumMapRef::const_reference
operator[](size_type position) const;Return a reference providing non-modifiable access to the element at the specified position in the array of map entries this reference object represents. The behavior is undefined unless `position < size()`.
a reference to the map entry at the specified position
| Name | Description |
|---|---|
| position | zero-based index of the entry |