On Fri, 2011-03-11 at 18:46 -0500, Jesse Phillips wrote: > Without testing: foreach (f; take(recurrence!("a[n-1] + a[n-2]")(0UL, 1UL), > 50)) > > teo Wrote: > > > Just curious: How can I get ulong here? > > > > foreach (f; take(recurrence!("a[n-1] + a[n-2]")(0, 1), 50)) > > { > > writeln(f); > > } >
Interestingly, or not, the code: long declarative ( immutable long n ) { return take ( recurrence ! ( "a[n-1] + a[n-2]" ) ( 0L , 1L ) , n ) ; } results in the return statement delivering: rdmd --main -unittest fibonacci_d2.d fibonacci_d2.d(15): Error: template std.range.take(R) if (isInputRange!(Unqual!(R)) && !isSafelySlicable!(Unqual!(R)) && !is(Unqual!(R) T == Take!(T))) does not match any function template declaration fibonacci_d2.d(15): Error: template std.range.take(R) if (isInputRange!(Unqual!(R)) && !isSafelySlicable!(Unqual!(R)) && !is(Unqual!(R) T == Take!(T))) cannot deduce template function from argument types !()(Recurrence!(fun,long,2u),immutable(long)) which seems deeply impenetrable for mere mortals. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Road m: +44 7770 465 077 xmpp: rus...@russel.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
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