Arising from a thread on the GoLangNuts email list, I wrote the following:

        import std.algorithm: reduce;
        import std.bigint;
        import std.range: iota;
        import std.stdio: writeln;

        int main(immutable string[] args) {
          foreach (int i; iota(10, 50, 10)) {
            writeln(reduce!"a * b"(BigInt(1), iota(BigInt(1),
        BigInt(i))));
          }
          return 0;
        }

Sadly the compiler refuses to acknowledge that iota works for BigInt. My
first assumption is that my code is wrong. My second assumption is that
std.range doesn't work with real integers — as opposed to those pesky
limited hardware things ;-)

        ./numbers_multiplePasses.d(10): Error: template std.range.iota does not match any function template declaration. Candidates are:
        /usr/include/dmd/phobos/std/range.d(5107):        std.range.iota(B, E, S)(B begin, E end, S step) if ((isIntegral!(CommonType!(B, E)) || isPointer!(CommonType!(B, E))) && isIntegral!(S))
        /usr/include/dmd/phobos/std/range.d(5192):        std.range.iota(B, E)(B begin, E end) if (isFloatingPoint!(CommonType!(B, E)))
        /usr/include/dmd/phobos/std/range.d(5199):        std.range.iota(B, E)(B begin, E end) if (isIntegral!(CommonType!(B, E)) || isPointer!(CommonType!(B, E)))
        /usr/include/dmd/phobos/std/range.d(5260):        std.range.iota(E)(E end)
        /usr/include/dmd/phobos/std/range.d(5267):        std.range.iota(B, E, S)(B begin, E end, S step) if (isFloatingPoint!(CommonType!(B, E, S)))
        /usr/include/dmd/phobos/std/range.d(5107): Error: template std.range.iota cannot deduce template function from argument types !()(BigInt,BigInt)
        Failed: 'dmd' '-v' '-o-' './numbers_multiplePasses.d' '-I.'

Thanks.

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