gistfile1.d

///Seed using an InputRange
void seedRange(T)(T range) if(isInputRange!T && is(Unqual!(ElementType!T) == UIntType))
{
    int j;
    for(j = 0; j < n && !range.empty; ++j, range.popFront())
    {
        mt[j] = range.front;
    }

    mti = n;
    if(range.empty && j < n)
        throw new Exception("MersenneTwisterEngine.seedRange: Input range didn't provide enough"
            " elements");

    popFront();
}

unittest
{
    Mt19937 gen;
    //This is repeating one unpredictableSeed! Not a good idea in general, but OK for the unittest
    bool thrown = false;
    try
        gen.seedRange(repeat(unpredictableSeed, 623));
    catch(Exception)
        thrown = true;

    assert(thrown);

    gen.seedRange(repeat(unpredictableSeed, 624));
    //infinite Range
    gen.seedRange(repeat(unpredictableSeed));
}