#!/usr/bin/env rdmd
import std.algorithm;
import std.range;
import std.stdio;
import std.traits;
import std.file;
 
static import std.string;
 
alias std.algorithm.splitter splitter;
alias std.string.splitLines byLine;
 
template to(T) {
  static import std.conv;
 
  T to(S)(S s) if(!isArray!S && isInputRange!S) {
    return std.conv.to!T(s.array());
  }
  T to(A...)(A args) {
    return std.conv.to!T(args);
  }
}
 
void main() {
  auto content = q"EOS
1 2
2 3
3 4
4 5
EOS";
 
  auto tmp = File("tmp.txt", "w");
  scope(exit) std.file.remove("tmp.txt");
  tmp.write(content);
  tmp.close();
 
  assert(equal(File("tmp.txt").byLine().map!(splitter)().map!(to!(int[]))(),
               [[1, 2], [2, 3], [3, 4], [4, 5]]));
 
  assert(equal(File("tmp.txt").byLine().map!(splitter)().map!(to!(int[]))(),
                       content.byLine().map!(splitter)().map!(to!(int[]))()));
}
 

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