digitalmars.D.bugs - [Issue 5052] New: take!(Take!R) should return Take!R, not Take!(Take!R)
- d-bugmail puremagic.com (18/70) Oct 13 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5052
- d-bugmail puremagic.com (7/7) Oct 14 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5052
- d-bugmail puremagic.com (9/9) Dec 13 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5052
http://d.puremagic.com/issues/show_bug.cgi?id=5052 Summary: take!(Take!R) should return Take!R, not Take!(Take!R) Product: D Version: D2 Platform: All OS/Version: All Status: ASSIGNED Severity: normal Priority: P2 Component: Phobos AssignedTo: bugzilla kyllingen.net ReportedBy: bugzilla kyllingen.net 23:52:56 PDT --- From D.learn: On Wed, 13 Oct 2010 18:06:15 +0000, Lars T. Kyllingstad wrote:On Wed, 13 Oct 2010 16:46:09 +0000, Nick Treleaven wrote:-- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------Hi, I'm new to D2 ranges but have been following D for some time. I'm posting here because I want to check if I'm doing anything wrong before filing a bug. The code below is a test case I made after hitting the problem in real code. Basically the pyramid recursive function should print out: [1, 2, 3] [1, 2] [1] This works fine when calling with an int[] range, but calling with SList!int seems to make the compiler hang, eating up memory. Should I file a bug? import std.stdio; import std.range; import std.container; void pyramid(Range)(Range items) { if (items.empty) return; writeln(items); auto len = walkLength(items); auto r = take(items, len - 1); pyramid(r); } void main() { /* array version is fine */ int[] arr = [1, 2, 3]; pyramid(arr[]); SList!int list = [1, 2, 3]; pyramid(list[]); /* infinite loop with dmd 2.049 */ }You are creating an infinite recursion of templates. For an array the return type of take() is the same array type. For other ranges, the return type of take() is Take!Range. So when you instantiate pyramid! Range, it instantiates pyramid!(Take!Range), and then pyramid!(Take!(Take! Range)), and so on ad infinitum. A solution could be to make take!(Take!Range)() just return another Take! Range. [...]
Oct 13 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5052 00:17:39 PDT --- Fixed in SVN: http://www.dsource.org/projects/phobos/changeset/2102 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 14 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5052 Lars T. Kyllingstad <bugzilla kyllingen.net> 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: -------
Dec 13 2010