H. S. Teoh:
I don't think it will affect existing code (esp. given Walter's stance on breaking changes!).
Making various parts of Phobos GC-free doesn't mean that nothing GC-allocates, it means that Phobos will offer means to use memory provided by the user. There are many situations where using a GC is OK, so both kinds of usages should be supported by Phobos. It should contain nothrow @nogc functions to format and to convert to number and strings. It's a matter of offering choice.
Bye, bearophile
