List.Chars
The List.Chars protocol is responsible for
converting a structure to a charlist (only if applicable).
The only function that must be implemented is
to_charlist/1 which does the conversion.
The to_charlist/1 function automatically imported
by Kernel invokes this protocol.
Function to_charlist/1
Converts term to a charlist.
to_charlist/1
Converts term to a charlist.
