TODO: added an item about the behavior of mpfr_sgn on NaN.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@4510 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 7 insertions, 0 deletions

diff --git a/TODO b/TODO
index 9d4aad047..a482e4137 100644
--- a/TODO
+++ b/TODO
@@ -41,6 +41,13 @@ Installation:
 Changes in existing functions:
 ##############################################################################
 
+- TODO before the 2.3.0 release: decide whether the new behavior
+  of mpfr_sgn on NaN should be documented. This new behavior is
+  compatible with the old one since the old behavior on NaN was
+  undefined (with the same meaning as in the C standard). The
+  rationale is that it is better to avoid undefined behavior when
+  one can replace it by something that makes sense.
+
 - many functions currently taking into account the precision of the *input*
   variable to set the initial working precison (acosh, asinh, cosh, ...).
   This is nonsense since the "average" working precision should only depend