http://d.puremagic.com/issues/show_bug.cgi?id=11409
Summary: Array element-wise comparison Product: D Version: unspecified Platform: All OS/Version: All Status: NEW Severity: normal Priority: P2 Component: druntime AssignedTo: nob...@puremagic.com ReportedBy: daniel...@bigpond.com --- Comment #0 from daniel...@bigpond.com 2013-11-01 02:37:19 PDT --- void main() { auto a = [0, 2, 0]; auto b = [1, 1, 1]; // add 2 to ALL elements in C auto c = a.dup; c[] += 2; assert(c == [2, 4, 2]); // add ALL elements in B to D auto d = a.dup; d[] += b[]; assert(d == [1, 3, 1]); // checks ALL elements in A are less than B assert(!(a < b)); // Error ... } As is shown above, there is an inconsistency in how array element-wise comparisons are handled in D. The logical conclusion (IMHO) after using the array vector operations that mutated all elements in the lhs, is that the operation would check that the comparison was true for (again) **ALL** elements of the arrays. Instead, it appears to only check for the first element for which the predicate holds true, and then stops. This is really weird, especially when the following holds: assert([2, 0, 0] > [1, 1, 1]); assert([0, 2, 0] < [1, 1, 1]); assert([0, 0, 2] < [1, 1, 1]); I couldn't find any relevant documentation on how this was supposed to work, so these are just best guesses support with data. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------