Does GNU Smalltalk support Unicode and MBCS?

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Yes. Strings however are processed (e.g. read from a file) byte-per-byte. If you need per-character processing, you should load the Iconv package and convert strings to UnicodeString, using the #asUnicodeString method.

Regular expression matching cannot operate directly on UnicodeString objects. This means that regular expression matching will not work with most multi-byte character encodings (it will work with UTF-8).

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