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digitalmars.D.bugs - [Issue 11654] New: std.complex.arg should return a value in the range 0 <= theta < 2*PI

reply d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=11654

           Summary: std.complex.arg should return a value in the range 0
                    <= theta < 2*PI
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: joseph.wakeling webdrake.net


--- Comment #0 from Joseph Rushton Wakeling <joseph.wakeling webdrake.net>
2013-11-30 09:12:38 PST ---
It ought to simplify handling (and testing) complex numbers if we constrain the
argument (i.e. angle theta in polar coordinate form) of complex numbers to fall
within the range [0, 2 * PI).

Example case: should arg(complex(-1.0, 0)) be PI or -PI?

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parent d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=11654


Joseph Rushton Wakeling <joseph.wakeling webdrake.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


--- Comment #1 from Joseph Rushton Wakeling <joseph.wakeling webdrake.net>
2013-11-30 09:20:59 PST ---
Sorry; this is nonsense, it ought to return a value in the range (-PI, PI]. 
The problem is that arg() is returning a value of -PI.

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