Regarding the syntax to unpack tuples into single variables,
Kenji Hara wrote a DIP (http://wiki.dlang.org/DIP32 ) denoting
tuples with the univesal syntax {...}, but people have found some
problems in it.
(I think Kenji didn't update that DIP with all the small
improvements we suggested in that thread, so they risk getting
lost.)
Maybe one solution is to use a "tup(...)" syntax, it's a bit
heavy, but it's clear and maybe it has no corner cases:
tup(int, string) tup = tup(1, "hi");
foreach (Float; tup(float, double, real)) { ... }
auto tup(x, y) = tup(1, "hi");
tup(auto x, y) = tup(1, "hi");
tup(int x, string y) = tup(1, "hi");
foreach (i, const tup(x, y); [tup(1,2), tup(3,4), tup(5,6), ...])
{
void foo(tup(int, string name), string msg);
(tup(A a, B b)) => a + b;
switch (tup) { case tup(1, 2): ... }
This is not very elegant, "tup" becomes a new keyword and
generally I don't like such strong abbreviations, like the ones
used in Rust language, but "tuple()" clashes with the
library-defined ones, and it's even more wordy if you want to
define an array of them:
[tuple(1,2), tuple(3,4), tuple(5,6), ...]
Bye,
bearophile
