X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=NEWS;h=dcf259c8acb0e0deae546dc200064601954a53e1;hp=44687e52caec4b724c559d258d52c40143c19ae5;hb=b301f03a61bc9f72b27940ca7fe1f8d0b343a4e2;hpb=0cbf40f6d41d256c4137a8469070e304a8480e3f

diff --git a/NEWS b/NEWS
index 44687e52..dcf259c8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,92 @@
 This file records noteworthy changes.
 
-1.0.9 (<date>)
+1.2.0 (<insert date>)
+* Added a structure<T> template class for the easy creation of user-defined
+  algebraic classes.
+* Improved the speed of subs() and normal() by the use of maps instead of
+  lists.
+* Many internal reorganizations and optimizations.
+* Caveats for class implementors:
+   - basic::copy() and basic::destroy() are gone; classes derived from
+     basic can use the defaults for the assignment operator and copy
+     constructor.
+   - basic::subs() and basic::normal() take an 'exmap &' instead of two
+     'lst &'.
+   - basic::subs() now descends into subexpressions (if accessible via
+     nops()/op()/let_op()). If you have a custom implementation of subs()
+     that calls basic::subs() after substituting subexpressions, this needs
+     to be changed to a call to subs_one_level().
+
+1.1.0 (3 April 2003)
+* Removed deprecated macros is_ex_a, is_ex_exactly_a and friends for good.
+* The scalar_products mechanism allows the specification of an index dimension.
+* Removed dirac_gamma6/7().
+* Added ex::to_polynomial().
+* subs() accepts an optional "options" argument. The option
+  subs_option::subs_algebraic enables "smart" substitutions in products and
+  powers.
+* Added stream manipulators "dflt", "latex", "python", "python_repr", "tree",
+  "csrc", "csrc_float", "csrc_double", "csrc_cl_N", "index_dimensions" and
+  "no_index_dimensions" to control the output format. Calling basic::print()
+  directly is now deprecated.
+* Made the hashing more simple and efficient.
+* Caveats for class implementors:
+   - basic::subs(): third argument changed from "bool" to "unsigned"
+   - unarchiving constructor and basic::unarchive(): "const" removed from
+     second argument
+   - basic::let_op() should only be implemented if write access to
+     subexpressions is desired
+   - simplify_ncmul() renamed to eval_ncmul()
+   - simplified_ncmul() renamed to hold_ncmul()
+   - nonsimplified_ncmul() renamed to reeval_ncmul()
+
+1.0.14 (1 March 2003)
+* Improved the C-source output: complex numbers are printed correctly (using
+  the STL complex<> template or cln::complex()), rational numbers use cl_RA()
+  in the CLN output, and small integers are printed in a more compact format
+  (e.g. "2.0" instead of "2.0000000e+00").
+* function_options::set_return_type() and function_options::do_not_evalf_params()
+  now actually work.
+
+1.0.13 (27 January 2003)
+* Contracting epsilon tensors with Euclidean indices now works.
+* Improved dummy index symmetrization in sums.
+* Added dirac_gammaL/R(), which can be used instead of dirac_gamma6/7()
+  but are single objects, to allow for a more compact notation of Dirac
+  strings.
+* Powers with negative numeric exponents are printed as fractions in the
+  LaTeX output.
+* Added symbolic_matrix() for the convenient creation of matrices filled
+  with symbols.
+* Added collect_common_factors() which collects common factors from the
+  terms of sums.
+* simplify_indexed() converts "gamma~mu*p.mu" to "p\".
+
+1.0.12 (30 October 2002)
+* Fixed a bug in power::expand() that could produce invalid expressions.
+* The input parser no longer ignores extra data following accepted input.
+* Improved the CLN C-source output (integers are printed as integers, and
+  floating point numbers include the precision).
+* Fixed a problem in the LaTeX-output of negative fractions.
+* Added print_latex() and print_csrc() to ginsh.
+* The sprem() function is now public.
+
+1.0.11 (18 September 2002)
+* Fixed a possible memory corruption in contractions of indexed objects with
+  delta or metric tensors.
+* Computing the derivative of a power series object with respect to a symbol
+  that is not the expansion variable now works correctly.
+* Several bugfixes in code generation.
+
+1.0.10 (24 July 2002)
+* Powers of indexed objects are now parenthesized correctly in LaTeX output.
+* Input parser handles indices (they have to be specified in the same list
+  as the symbols).
+* Added some limited support for subspaces in the idx and tensor classes.
+* Fixed a bug in canonicalize() (antisymmetric canonicalization of an already
+  sorted list containing two or more equal objects failed to return 0).
+
+1.0.9 (11 June 2002)
 * simplify_indexed() now raises/lowers dummy indices to canonicalize the index
   variance. This allows some simplifications that weren't possible before,
   like eps~a.b~c~d*X.a*X~b -> 0 and X.a~a-X~a.a -> 0.