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August 20, 2010
[Issue 4685] New: in contract of base class affected by the body of the overriding function
http://d.puremagic.com/issues/show_bug.cgi?id=4685

          Summary: in contract of base class affected by the body of the
                   overriding function
          Product: D
          Version: D2
         Platform: Other
       OS/Version: Windows
           Status: NEW
         Severity: normal
         Priority: P2
        Component: DMD
       AssignedTo: nobody@puremagic.com
       ReportedBy: andrej.mitrovich@gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2010-08-19 17:39:30 PDT ---
This code is normal:

import std.conv;

class BasicDate
{
   string format(string spec)
   in
   {
       writeln("in basicdate.format contract");
       writeln(spec);
       assert(spec == "1234");
   }
   body
   {
       return "";
   }
}

class Date : BasicDate
{
   override string format(string spec)
   in  
   {
       writeln("in date.format contract");
       writeln(spec);
       assert(spec == "1234");
   }
   body
   {
       //~ string x;
       return "";
   }
}

import std.stdio;

unittest
{
   auto mydate = new Date;
   mydate.format("1234");
}

void main()
{
}

Prints:
in basicdate.format contract
1234

Now I uncomment the "string x" line in the overriding function:

import std.conv;

class BasicDate
{
   string format(string spec)
   in
   {
       writeln("in basicdate.format contract");
       writeln(spec);
       assert(spec == "1234");
   }
   body
   {
       return "";
   }
}

class Date : BasicDate
{
   override string format(string spec)
   in  
   {
       writeln("in date.format contract");
       writeln(spec);
       assert(spec == "1234");
   }
   body
   {
       string x;
       return "";
   }
}

import std.stdio;

unittest
{
   auto mydate = new Date;
   mydate.format("1234");
}

void main()
{
}

Prints:
in basicdate.format contract
(null)
in date.format contract
1234

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August 20, 2010
[Issue 4685] in contract of base class affected by the body of the overriding function
http://d.puremagic.com/issues/show_bug.cgi?id=4685


Stewart Gordon <smjg@iname.com> changed:

          What    |Removed                     |Added
----------------------------------------------------------------------------
          Keywords|                            |wrong-code
                CC|                            |smjg@iname.com
           Version|D2                          |D1 & D2


--- Comment #1 from Stewart Gordon <smjg@iname.com> 2010-08-20 06:32:34 PDT ---
Under DMD 1.063, it fails as written as writeln isn't defined, but if changed
to writefln I get

in basicdate.format contract
xin date.format contract
1234

Under 2.048, I get the same, but if I change it to use writefln then I get

in basicdate.format contract
in date.format contract
1234

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January 25, 2012
[Issue 4685] in contract of base class affected by the body of the overriding function
http://d.puremagic.com/issues/show_bug.cgi?id=4685


Walter Bright <bugzilla@digitalmars.com> changed:

          What    |Removed                     |Added
----------------------------------------------------------------------------
            Status|NEW                         |RESOLVED
                CC|                            |bugzilla@digitalmars.com
        Resolution|                            |DUPLICATE


--- Comment #2 from Walter Bright <bugzilla@digitalmars.com> 2012-01-25 13:40:21 PST ---
*** This issue has been marked as a duplicate of issue 7335 ***

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