From: Yukihiro Matsumoto <matz@...>
Date: 2007-07-16T23:52:57+09:00
Subject: Re: sprintf: Format specifier tokens aren't checked well enough

Hi,

In message "Re: sprintf: Format specifier tokens aren't checked well enough"
    on Mon, 2 Jul 2007 05:20:31 +0900, Florian Gross <florgro@gmail.com> writes:

|Something seems to be broken for %u with negative bignums:

Right.

|"%u" % -5 # => "..4294967291"

Dots do not work well with decimals.  Maybe we should either

  * prohibit negative number for %u
  * or make %u works as an alias to %d (a la Python)

|"%.20u" % -5 # => "..........4294967291"
|"%+u" % -5 # => "-5"

Since %u specifies "unsigned" it should ignore "+" modifier.

|big = -(2 ** 80 + 5)
|"%u" % big # => "-79226953588444722964369244155"
|"%.50u" % big # =>
|"....................-79226953588444722964369244155"

Dots and negative sign should not co-exist.  My 1.8.6 gives 

  ".....................79226953588444722964369244155"

which is still wrong though.

							matz.