Return the non-modifiable string representation corresponding to the specified enumeration value, if it exists, and a unique (error) string otherwise. The string representation of value matches its corresponding enumerator name with the "e_" prefix elided. For example: ` bsl::cout << CopyMoveState::toAscii(CopyMoveState::e_COPIED_INTO); ` will print the following on standard output: ` COPIED_INTO ` Any of the *_INTO enums can be bitwise ORed with e_MOVED_FROM, in which case the resulting string will be a comma-separated list of two names, e.g., "COPIED_CONST_INTO, MOVED_FROM". Note that specifying a value that does not match any valid combination of enumerators will result in a string representation that is distinct from any of those corresponding to the enumerators, but is otherwise unspecified.