[Bug c++/28408] What should be value of complex<double>(1.0,0.0) *= -1?

[pluto at agmk dot net]

------- Comment #6 from pluto at agmk dot net  2006-09-06 19:18 -------
(In reply to comment #2)
> I think this difference is ultimately due to the existenxce of a separate *_O0
> version of tree_lower_complex, in tree-complex.c. Rth added it (as part of
> fixing 20610), I believe the generic version is right (-0), and I'm hoping
> he wants to have a look to this issue...

mathematically (x+yi)u = xu+yui.
we have x=1, y=0, u=-1, so the result is -1+(0*-1)i.
so, how c++ define the 0*-1 ?


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pluto at agmk dot net changed:

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28408