String splitting in the D language

Question

I am learning D and trying to split strings:

   import std.stdio;
   import std.string;

    auto file = File(path, "r"); 
    foreach (line; file.byLine) {
           string[] parts = split(line);

This fails to compile with:

Error: cannot implicitly convert expression (split(line)) of type char[][] to string[]

This works:

    auto file = File(path, "r"); 
    foreach (line; file.byLine) {
           char[][] parts = split(line);

But why do I have to use a char[][]? As far as I understand the documentation, it says that split returns a string[], which I would prefer.

Answer 1

Use split(line.idup);

split is a template function, the return type depends on its argument. file.byLine.front returns a char[] which is also reused for performance reasons. So if you need the parts after the current loop iteration you have to do a dup or idup, whatever you need.