[GiNaC-devel] [SCM] GiNaC -- a C++ library for symbolic computations branch, ginac_1-5, updated. release_1-4-0-187-g0256e2f

[Jens Vollinga]

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The branch, ginac_1-5 has been updated
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- Log -----------------------------------------------------------------
commit 0256e2fe48a0ecce79c37ac209620ca852b7f11a
Author: Alexei Sheplyakov <varg at metalica.kh.ua>
Date:   Mon Feb 23 14:08:42 2009 +0200

    calchash(): work around broken RTTI.
    
    Due to the strange (although permitted by the standard) behaviour of C++
    RTTI on woe32 calchash() returns different hash values for equal objects.
    As a result automatic evaluation gets spectacularly broken:
    
    examining clifford objects.....({1+t,2+x,3+y,4+z}) - ({1+t,2+x,3+y,4+z}) erroneously returned -{1+t,2+x,3+y,4+z}+{1+t,2+x,3+y,4+z} instead of 0
    ({1+t,2+x,3+y,4+z}) - ({1+t,2+x,3+y,4+z}) erroneously returned -{1+t,2+x,3+y,4+z}+{1+t,2+x,3+y,4+z} instead of 0
    .({1+t,2+x,3+y,4+z}) - ({1+t,2+x,3+y,4+z}) erroneously returned -{1+t,2+x,3+y,4+z}+{1+t,2+x,3+y,4+z} instead of 0
    ({1+t,2+x,3+y,4+z}) - ({1+t,2+x,3+y,4+z}) erroneously returned {1+t,2+x,3+y,4+z}-{1+t,2+x,3+y,4+z} instead of 0
    [skipped]
    .......FAIL: exam_clifford.exe
    
    This patch works around `features' of woe32 RTTI, so calchash() works
    properly.

commit 75b1f2213aa6dc0e563b8ad6202522a5f40cb5be
Author: Alexei Sheplyakov <varg at metalica.kh.ua>
Date:   Mon Feb 23 14:03:16 2009 +0200

    Fix compilation failure due to (template) operator- defined in factor.cpp
    
    GiNaC 1.5.0 fails to compile with g++ 3.4.
    The fix is simple: declare (and define) operator- (and operator+) only
    for (univariate) polynomials.

-----------------------------------------------------------------------

Summary of changes:
 ginac/Makefile.am    |    2 +-
 ginac/basic.cpp      |    4 +-
 ginac/crc32.h        |   74 ++++++++++++++++++++++++++++++++++++++++++++++++++
 ginac/expairseq.cpp  |    4 +-
 ginac/factor.cpp     |   32 ++++++++++++++++++++-
 ginac/function.pl    |    4 +-
 ginac/hash_seed.h    |   45 ++++++++++++++++++++++++++++++
 ginac/idx.cpp        |    4 +-
 ginac/relational.cpp |    4 +-
 ginac/symbol.cpp     |    5 ++-
 ginac/symmetry.cpp   |    4 +-
 ginac/wildcard.cpp   |    5 ++-
 12 files changed, 168 insertions(+), 19 deletions(-)
 create mode 100644 ginac/crc32.h
 create mode 100644 ginac/hash_seed.h


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