[Issue 13680] New: Better printing of class instances that don't have a toString

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13680

          Issue ID: 13680
           Summary: Better printing of class instances that don't have a
                    toString
           Product: D
           Version: unspecified
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody at puremagic.com
          Reporter: bearophile_hugs at eml.cc

This program shows the current default printing of class instances (dmd
2.067alpha):


class Foo {}
void main() {
    import std.stdio;
    Foo f;
    f.writeln;
    f = new Foo;
    writeln(f, " ", cast(void*)f);
}


Output:

null
test.Foo 2001FE0


But perhaps it's better for D writeln to print class instances (that don't have
a toString) more like Java:

test.Foo at null
test.Foo at 2001FE0 2001FE0


This is useful in debugging and code development, because the address allows to
see what class instances are equal.

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