reference to compiled regexp
lexically scoped functions: my sub foo { ... }
lvalue functions
+ Full 64 bit support
Possible pragmas
debugger
ref function in list context
data prettyprint function? (or is it, as I suspect, a lib routine?)
make tr/// return histogram in list context?
- undef wantarray in void context
Loop control on do{} et al
Explicit switch statements
built-in globbing