In floating point value comparison, +0.0 is equal to -0.0.

    auto x = +0.0;
    auto y = -0.0;
    assert(x == y);

Kenji Hara


2013/4/23 Mehrdad <wfunction@hotmail.com>
On Tuesday, 23 April 2013 at 04:33:24 UTC, Chris Cain wrote:
On Tuesday, 23 April 2013 at 04:27:45 UTC, Mehrdad wrote:
?!??!

opEquals by default is simply a bit-level value check.



In fact, it's _doubly_ broken...

        import std.stdio;
        struct S { float d; }
        void main()
        {
            writeln(+0.0);
            writeln(-0.0);
            writeln(S(+0.0) == S(-0.0));
        }


Output:
        0
        -0
        true