Rather neat way of doing multiple return values

[Jesse Phillips]

On Sat, 17 Mar 2007 13:00:03 -0700, kris wrote:

> Tom S wrote:
>> Downs wrote:
>> 
>>> Here's a (imnsho) rather neat implementation of multiple return values 
>>> from functions.
>>>
>>> (...)
>>> Have fun! :D
>> 
>> 
>> Hehehe nice :) Here's my version:
>> 
>> 
>> ---
>> 
>> import std.stdio;
>> import std.bind;
>> 
>> 
>> 
>> struct PtrTuple(P, V) {
>>     P ptrs;
>> 
>>     void opAssign(V v) {
>>         foreach (i, x; v.value) {
>>             *ptrs.value[i] = x;
>>         }
>>     }
>> }
>> 
>> 
>> 
>> PtrTuple!(PointerTuple!(Tuple!(T)), Tuple!(T)) tup(T ...)(inout T t) {
>>     PtrTuple!(PointerTuple!(Tuple!(T)), Tuple!(T)) ptrs;
>>                
>>     foreach (i, dummy_; t) {
>>         ptrs.ptrs.value[i] = &t[i];
>>     }
>> 
>>     return ptrs;
>> }
>> 
>> 
>> Tuple!(int, float, char) someFunc(int i) {
>>     return tuple(i, 0.1f * i, cast(char)i);
>> }
>> 
>> 
>> 
>> void main() {
>>     int a;
>>     float b;
>>     char c;
>> 
>>     tup(a, b, c) = someFunc(55);
>> 
>>     writefln("a = %s", a);
>>     writefln("b = %s", b);
>>     writefln("c = %s", c);
>> }
>> 
>> ---
>> 
>> Maybe Phobos could use such a utility, as it (apparently) gets 
>> reimplemented numerous times ?
>> 
>> 
>> -- 
>> Tomasz Stachowiak
> 
> 
> Cool, but it's worth pointing out that this is probably Latin to most 
> people :)

I agree with you here, I tried to follow how it works but am so unfamiliar
with the tools used I got lost and surprised by the result. :)