digitalmars.D.bugs - [Issue 4288] New: Error on passing delegate to C linkage function.
- d-bugmail puremagic.com (26/26) Jun 06 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4288
- d-bugmail puremagic.com (21/21) Jun 06 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4288
- d-bugmail puremagic.com (23/23) Jun 06 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4288
- d-bugmail puremagic.com (11/11) May 12 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4288
- d-bugmail puremagic.com (10/10) May 12 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4288
http://d.puremagic.com/issues/show_bug.cgi?id=4288 Summary: Error on passing delegate to C linkage function. Product: D Version: 1.057 Platform: x86 OS/Version: All Status: NEW Severity: normal Priority: P2 Component: DMD AssignedTo: nobody puremagic.com ReportedBy: adam.chrapkowski gmail.com 09:24:38 PDT --- Error occurs, when you try to use a delegate as a parameter to a C linked function. ex: extern (C) void c_func(void delegate() dg); void d_func(void delegate() dg) { c_func(dg); } Error: function test.c_func (void delegate()) does not match parameter types (void delegate()) Error: cannot implicitly convert expression (dg) of type void delegate() to void delegate() -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jun 06 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4288 Robert Clipsham <robert octarineparrot.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |robert octarineparrot.com 17:59:33 BST --- I don't think this bug is valid, something does need to be done about it though. The following works: ---- alias extern(C) void delegate() cdg; extern (C) void c_func(void delegate() dg); void d_func(cdg dg) { c_func(dg); } ---- So the problem is the linkage of the delegates doesn't match, there's no way to get around it without an alias though, you can't have extern(C) in the function parameters. Either the error needs improving, or there needs to be a way to specify the linkage in the function args. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jun 06 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4288 11:11:41 PDT --- So two questions: 1. Why the following is allowed: extern (C) void c_func(void delegate()); ? 2. What does mean extern (C) void delegate() ? Delegate is just a 'data structure which consists of two pointers' and anything more. Something like C delegate does not exists. Linkage is related to functions not data structures delegate is a data structure. So if D data structures are disallowed in C functions why the following is allowed? extern (C) void c_func(string, Foo); class Foo{...} void d_func() { scope foo = new Foo(); string str = "Hello World!"; c_func(str, foo); } string is a data structure as delegate, foo is a pointer to a data structure. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jun 06 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4288 klickverbot <code klickverbot.at> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |code klickverbot.at --- Error message fix: https://github.com/D-Programming-Language/dmd/pull/943 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
May 12 2012
http://d.puremagic.com/issues/show_bug.cgi?id=4288 Walter Bright <bugzilla digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |bugzilla digitalmars.com Resolution| |FIXED -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
May 12 2012