• d-bugmail puremagic.com (35/35) Nov 12 2012 http://d.puremagic.com/issues/show_bug.cgi?id=9016

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=9016

           Summary: swap() doesn't work with std.container.DList.front and
                    back
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc


--- Comment #0 from bearophile_hugs eml.cc 2012-11-12 20:31:03 PST ---
std.container.DList supports a manually written swap of its front and back
items, but it seems std.algorithm.swap() on them is not supported:


import std.stdio, std.algorithm, std.container;
void main() {
    auto L = DList!int([10, 20, 30]);
    writeln(L[]); // [10, 20, 30]
    auto aux = L.front;
    L.front = L.back;
    L.back = aux;
    writeln(L[]); // [30, 20, 10]
    //swap(L.front, L.back);
}


If you uncomment the swap dmd 2.061alpha gives:

test.d(9): Error: template std.algorithm.swap does not match any function
template declaration
...\dmd2\src\phobos\std\algorithm.d(1767): Error: template std.algorithm.swap
cannot deduce template function from argument types !()(int,int)

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