Re: 'pp' for D?

[Daniel Davidson]

On Sunday, 29 September 2013 at 14:31:15 UTC, linkrope wrote:
I want to pretty-print the representation of a value of a 
generic type T.
In Ruby, I would use 'pp':
    value = 'hello'
    pp value  # prints "hello" - with quotes!
    value = 42
    pp value  # prints 42

Now, value.to!string eliminates the quotes, should value be of 
type string.
As a workaround, I put the value into an array to make use of 
the "undocumented" function formatElement:

    "%(%s%)".format([value])

Ugly! Where does Phobos hide the function I'm looking for?

I have one at: 
https://github.com/patefacio/d-help/blob/master/d-help/pprint/pp.d

The following code outputs the text below:

    import std.stdio;
    import pprint.pp;

    enum Color {
      Red,
      White,
      Blue
    }

    struct R {
      int x = 22;
      string s = "foobar";
    }

    struct S {
      int i;
      R r;
    }

    struct T {
      int []i;
      string []j;
    }


    void main() {
      auto s = S(3);
      auto t = T([1,2,3], ["a", "b", "c"]);

      writeln(pp(Color.Red));
      writeln(pp(42));
      writeln(pp("hello"));
      writeln(pp(s));
      writeln(pp(t));
    }


Outputs

    Red
    42
    "hello"
    {
     (S).i = 3
     (S).r = {
      (R).x = 22
      (R).s = "foobar"
     }
    }
    {
     (T).i = [
      [0]->1
      [1]->2
      [2]->3
     ]
     (T).j = [
      [0]->"a"
      [1]->"b"
      [2]->"c"
     ]
    }