Return Option rather than fail for `slice_shift_char` and {shift,pop}_{char,byte} #12797

Merged

bors merged 3 commits intorust-lang:masterfrom

pczarn:str_safety

Mar 12, 2014

Commits on Mar 10, 2014

libstd: Change `slice_shift_char`, `shift_char`, `pop_char`, `shift_byte` and `pop_byte` to return an Option instead of failing
pczarn
committed
libstd: Add unit tests for `slice_shift_char`
pczarn
committed
libstd: Update docs for `slice_shift_char` and {shift,pop}_{char,byte}
pczarn
committed