csvReader read file byLine()?

[Jesse Phillips]

On Friday, 22 June 2012 at 08:12:59 UTC, Jens Mueller wrote:
> The last line throws a CSVException due to some conversion error
> 'Floating point conversion error for input "".' for the 
> attached input.
>
> If you change the input to
> 3.0
> 4.0
> you get no exception but wrong a output of
> [[4], [4]]
> .

Yes, and it seems .joiner isn't as lazy as I'd have thought. 
byLine() reuses its buffer so it will overwrite previous lines in 
the file. This can be resolved by mapping a dup to it.

import std.stdio;
import std.algorithm;
import std.csv;

void main()
{
     struct Record {
         double one;
     }
     auto filename = "file.csv";
     auto file = File(filename, "r");
     auto input = map!(a => a.idup)(file.byLine()).joiner("\n");
     auto records = csvReader!Record(input);
     foreach(r; records)
     {
         writeln(r);
     }
}