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digitalmars.D.bugs - [Issue 2154] New: static if (is(typeof(E.toString()) : string)) in template broken

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2154

           Summary: static if (is(typeof(E.toString()) : string))  in
                    template broken
           Product: D
           Version: 2.014
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: someanon yahoo.com


This code works fine with v2.013.

Both v2.014, v2.015 now errors out.

BTW, is there another way to write this code? thanks.

$ cat temp.d

class V(E) {
    E[2] data;
    public /*override*/ string toString() {
      static if (is(typeof(E.toString()) : string)) {  // error line!
      return "";
      } else {
      string str = "";
      return str;
      }
    }
}

class A {
  public string toString() {
    return "";
  }
}

typedef V!(A) VA;


$ dmd -c temp.d
Error: this for toString needs to be type A not type temp.V!(A).V


-- 
Jun 18 2008
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2154





------- Comment #1 from 2korden gmail.com  2008-08-07 18:35 -------
Not sure if it is a bug or not.
You are trying to access a non-static method. Try one of these solutions:

1) Make the method static:

class A {
  public static string toString() {
    return "";
  }
}

2) change your test code:

...
static if (is(typeof((new E()).toString()) : string)) {
...

Both work for me.

Let someone more knowledgeable decide whether we need to close the issue.


-- 
Aug 07 2008
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2154





------- Comment #2 from 2korden gmail.com  2008-08-07 18:51 -------
*** Bug 2274 has been marked as a duplicate of this bug. ***


-- 
Aug 07 2008
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2154


smjg iname.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |smjg iname.com
           Severity|normal                      |regression
           Keywords|                            |rejects-valid




------- Comment #3 from smjg iname.com  2008-11-24 06:21 -------
(In reply to comment #1)
 Not sure if it is a bug or not.
 You are trying to access a non-static method. Try one of these solutions:

It is, because the very design of IsExpression is that semantic analysis errors never escape it, but instead cause the IsExpression to evaluate to false. --
Nov 24 2008
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2154


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |clugdbug yahoo.com.au
         Resolution|                            |FIXED




--- Comment #4 from Don <clugdbug yahoo.com.au>  2009-09-04 03:03:43 PDT ---
This works now. Not sure when it was fixed, but it was 2.022 or earlier.

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