www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 8560] New: Strange behavior of lambda expressions

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8560

           Summary: Strange behavior of lambda expressions
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: iu.biryukov gmail.com



I came up with this code while playing around with D:

import std.stdio;

public class Test(alias fun, alias fun2) {
  void doIt() {
    fun();
    fun2();
  }
}


void main() {
  (new Test!(
      () => {writeln("fun1");},
      () => writeln("fun2")
    )
  ).doIt();
}

After compiling this code I expect to see the following output(or compiler
error, if I'm misusing lambda syntax):
fun1
fun2

Insted I get:
fun2

DMD64 D Compiler v2.060

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Aug 18 2012
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8560


klickverbot <code klickverbot.at> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |code klickverbot.at
         Resolution|                            |INVALID



---
Marking as invalid, since {writeln("fun1");} is a parameterless delegate
literal. This delegate is returned by the call to fun(), but never invoked.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Aug 18 2012
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8560





 Marking as invalid, since {writeln("fun1");} is a parameterless delegate
 literal. This delegate is returned by the call to fun(), but never invoked.
Thanks, now I get it. background. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Aug 18 2012
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8560




---


 background.
Mhm, even if the current behavior is to spec, it can definitely be surprising. If you feel something should be done about this, please consider starting a discussion on the forums. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Aug 18 2012