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Unlike specifying the encoding
argument in as_string()
and
as_character()
, which is only declarative, these functions
actually attempt to convert the encoding of their input. There are
two possible cases:
The string is tagged as UTF-8 or latin1, the only two encodings
for which R has specific support. In this case, converting to the
same encoding is a no-op, and converting to native always works
as expected, as long as the native encoding, the one specified by
the LC_CTYPE
locale (see mut_utf8_locale()
) has support for
all characters occurring in the strings. Unrepresentable
characters are serialised as unicode points: "<U+xxxx>".
The string is not tagged. R assumes that it is encoded in the native encoding. Conversion to native is a no-op, and conversion to UTF-8 should work as long as the string is actually encoded in the locale codeset.
as_utf8_character(x)as_native_character(x)
as_utf8_string(x)
as_native_string(x)
An object to coerce.
# NOT RUN {
# Let's create a string marked as UTF-8 (which is guaranteed by the
# Unicode escaping in the string):
utf8 <- "caf\uE9"
str_encoding(utf8)
as_bytes(utf8)
# It can then be converted to a native encoding, that is, the
# encoding specified in the current locale:
# }
# NOT RUN {
mut_latin1_locale()
latin1 <- as_native_string(utf8)
str_encoding(latin1)
as_bytes(latin1)
# }
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