1) ICU should be optional
If configured --without-icu the Makefile shouldn't contain ICU stuff, and function calls to ICU (mainly in string_primitives) should be wrapped inside #if PARROT_HAS_ICU.
2) complete src/encoding.c
encoding registering, lookup, deinit, and opcodes can follow the scheme used in src/charset.c.
3) trans_encode opcodes to change a strings encoding (s. trans_charset)
4) imcc syntax to specify encoding. I'm thinking of:
[charset:][encoding:]"string"
so both charset and encoding are optional but can be specified. Usually just one is needed:
iso-8859-1:"Tötsch"
but
utf8:"T\xc3\xb6tsch"
Currently only a charset can be specified.
5) implement UTF-16 encodings.
Takers wanted, leo
