2009-09-05 Timo Bingmann
* Two small fix-up lines to get it working with bison-2.4.1. Added
one standard header include and making CalcNode a opaque class
pointer in %union due to changed include file order.
* Correcting associativity of the power operator: right.
2008-10-23 Timo Bingmann
* FlexLexer.h, scanner.ll: Corrected a very subtle bug with the
newly introduced virtual yywrap() function in the FlexLexer
class. Depending on how the header was included, the class
contained the virtual yywrap() function or not. These differing
class declarations lead to very strange NULL pointer exceptions,
because the different compiled objects assume different class
memory layouts. Ultimately the exprtest program always segfaulted.
2008-08-03 Timo Bingmann
* scanner.ll, y.tab.h: Fixing compilation problem which was
reported to happen when no %union directive is used: in this case
the include headers order is changed around by bison and breaks
compilation. This was fixed by never including parser.h directly,
but always using scanner.h.
* FlexLexer.h: updated file to work with new flex version
2.5.35. The new version adds a virtual function yywrap() to the
yyFlexLexer class. This function is automatically defined in any
lexer source file generated by flex. However because I copied
FlexLexer.h from an older flex distribution, the function
definition throws a "no member function" compiler error.
