digitalmars.D.bugs - [Issue 3249] New: sort and setIntersection on array of struct or class
- d-bugmail puremagic.com (50/50) Aug 12 2009 http://d.puremagic.com/issues/show_bug.cgi?id=3249
- d-bugmail puremagic.com (13/13) Aug 12 2009 http://d.puremagic.com/issues/show_bug.cgi?id=3249
- d-bugmail puremagic.com (9/9) Aug 28 2009 http://d.puremagic.com/issues/show_bug.cgi?id=3249
http://d.puremagic.com/issues/show_bug.cgi?id=3249 Summary: sort and setIntersection on array of struct or class Product: D Version: 2.031 Platform: x86 OS/Version: Windows Status: NEW Severity: normal Priority: P2 Component: Phobos AssignedTo: nobody puremagic.com ReportedBy: Jesse.K.Phillips+D gmail.com CC: Jesse.K.Phillips+D gmail.com If you create an array of struct or class, sorting does not work for std.algorthm.sort The error from using sort: C:\opt\dmd\windows\bin\..\..\src\phobos\std\algorithm.d(3620): Error: static assert "Invalid predicate passed to sort: a < b" The error from using setIntersection: C:\opt\dmd\windows\bin\..\..\src\phobos\std\functional.d(191): Error: static assert "Bad binary function q{a < b}. You need to use a valid D expression using symbols a of type S and b of type S." The code used: import std.algorithm; import std.stdio; struct S { string label; int opCmp(S s2) { if(label < s2.label) return -1; if(label > s2.label) return 1; else return 0; } } void main() { auto s1 = new S[2]; auto s2 = new S[2]; s1[0].label = "fish"; s1[1].label = "bar"; s2[0].label = "foo"; s2[1].label = "fish"; // Comment out to get setInterseciton error sort(s1); foreach(str; setIntersection(s1,s2)) writeln(str); } -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Aug 12 2009
http://d.puremagic.com/issues/show_bug.cgi?id=3249 Andrei Alexandrescu <andrei metalanguage.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED CC| |andrei metalanguage.com AssignedTo|nobody puremagic.com |andrei metalanguage.com 16:21:53 PDT --- This is because the default comparison is passed as a string, which does not see the definition of the struct. I'll change that to a function. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Aug 12 2009
http://d.puremagic.com/issues/show_bug.cgi?id=3249 Andrei Alexandrescu <andrei metalanguage.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Aug 28 2009