R/encoding.R
native_encode.RdApply enc2native() to the character vector, and check if enc2utf8() can
convert it back without a loss. If it does, return enc2native(x), otherwise
return the original vector with a warning.
native_encode(x)On platforms that supports UTF-8 as the native encoding
(l10n_info()[['UTF-8']] returns TRUE), the conversion will be
skipped.