Bugs in Bison 2.0: YYSTYPE and yylval

[evilfred]

Hi,

I'm using Bison 2.0 with Flex 2.5.27 in MinGW in Windows. I've had two
weird problems, and I'm not sure if it's Bison's fault or something
wrong with my configuration:

- in the generated c file, just after the part where it says
"initialize stack pointers", there is a line that says "yyvsp[0] =
yylval;". this kills my program as yylval is not initialized yet. I
threw in an %initial-action that sets yylval to 0 for now to
workaround this.

- I have stuff at the top of my grammar like so:

     %{
        #define YYSTYPE double
        ...
     %}

     %defines

  yet this is never copied into the generated header file. instead I get this:

    #if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
    typedef int YYSTYPE;
    # define yystype YYSTYPE /* obsolescent; will be withdrawn */
    # define YYSTYPE_IS_DECLARED 1
    # define YYSTYPE_IS_TRIVIAL 1
    #endif

I've looked through the archives and can't find any responses about
these questions. Thanks for your help.

- Chris