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Fixed a bug in atan2. It gave a division by zero error for calls like
author
Jens Vollinga
<jensv@nikhef.nl>
Thu, 25 Mar 2010 09:36:41 +0000
(10:36 +0100)
committer
Jens Vollinga
<jensv@nikhef.nl>
Thu, 25 Mar 2010 09:39:56 +0000
(10:39 +0100)
atan2(-Pi,0), because arguments like -Pi were not recognized (via
info_flags) as negative but as real nevertheless.
(cherry picked from commit
9e13d46552bb7852399867b9eb355732b9ded59e
)
ginac/inifcns_trans.cpp
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diff --git
a/ginac/inifcns_trans.cpp
b/ginac/inifcns_trans.cpp
index 39931dcd738cf5a72cebd371468726c88fa1809f..3f161d218c068e2a4d016fce5d5cfcb2d32f789e 100644
(file)
--- a/
ginac/inifcns_trans.cpp
+++ b/
ginac/inifcns_trans.cpp
@@
-842,7
+842,7
@@
static ex atan2_eval(const ex & y, const ex & x)
return _ex1_2*Pi;
// atan(y, 0), y real and negative -> -Pi/2
- if (y.info(info_flags::
negative
))
+ if (y.info(info_flags::
real) && !y.is_zero(
))
return _ex_1_2*Pi;
}