* acinclude.m4 (GINAC_CHECK_ERRORS): exit with non-zero return value on error.

[ginac.git] / NEWS

diff --git a/NEWS b/NEWS
index 13d6253997974a5f15a19d5bc4a05c11255653ed..dcf259c8acb0e0deae546dc200064601954a53e1 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -3,11 +3,15 @@ This file records noteworthy changes.
 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