Re: Bison 1.50 pre & post prologue bug

[Akim Demaille]

| Bison 1.50 does not seem to handle the pre & post prologues properly; that
| is, when writing:
| %{
|   pre_prologue
| %}
| ...
| %{
|   post_prologue
| %}
| ...
| %%
| ...
| in the .y files as above, the b4_post_prologue macro expands to empty, and
| all stuff goes into the first b4_pre_prologue macro.
| 
| -- I need this for writing my C++ skeleton file: Some stuff should then go
| into the header and other into the source file. This is often required with
| polymorphic classes and stuff relying on forward declarations, but also
| useful in order to decrease the number of headers that the header includes.

pre and post-prologue are implementation details.  You should tell us
what the *real* problem is.

pre- and post-, as implementation details, are separated by %union.