Set charset name and preprocess strings

It is a tiny parse transform, that converts literal strings into something else.

License: MIT

Author: Uvarov Michael (freeakk@gmail.com)

Status: Experimental

-compile({parse_transform, gin}).
-encoding({SourceEncoding, StringsEncoding, StringsType}).

where:

• SourceEncoding is a term of the unicode:encoding() type. Valid values:
  • latin1;
  • utf8;
  • {utf16, big};
  • {utf16, little};
  • {utf32, big};
  • {utf32, little}.
• StringsEncoding is a term of the unicode:encoding() type. Valid values:
  • latin1;
  • unicode;
  • utf8;
  • utf16;
  • {utf16, big};
  • {utf16, little};
  • utf32;
  • {utf32, big};
  • {utf32, little}.
• StringsType. Valid values:
  • list;
  • binary.

Common combinations:

• {latin1, latin1, list}. This encoding is used by Erlang by default.
• {utf8, unicode, list}. A string is a list of codepoints.
• {utf8, utf16, binary}. The module uses probably ICU for string processing.