• Profile Anaysis (5/5) Jan 24 2017 test.d(22): Error: cannot append type test.Path to type test.Path
• Chris Wright (12/16) Jan 24 2017 You *can* append a type to itself:

Profile Anaysis <PA gotacha.com> writes:

test.d(22): Error: cannot append type test.Path to type test.Path

This is due to the changing some code that was appending. 
Obviously we can't append a type to itself.

Would be nice if the error message was more clear like:

Type test.Path is not an array. Cannot append to itself.

Chris Wright <dhasenan gmail.com> writes:

On Tue, 24 Jan 2017 23:39:40 +0000, Profile Anaysis wrote:

 test.d(22): Error: cannot append type test.Path to type test.Path
 
 This is due to the changing some code that was appending. Obviously we
 can't append a type to itself.

You *can* append a type to itself:

  struct Path
  {
    Path opBinary(string op)(ref const Path other) if (op == "~")
    {
      return Path.init;
    }
  }

  Path a, b;
  Path c = a ~ b;

That's why the error message isn't clearer.