Re: Memory leaks upon error recovery in Yacc

Hello!


David Pereira <davidpereira@home.com> wrote:
>[...]


>The problem is error productions. When an error occurs, the yacc/bison
>[...]
>into a bigger subtree, had the parse gone smoothly at that level. Therefore,
>I have memory leaks and I would like to deallocate those subtrees. One
>[...]


>[You can try to free memory by using error rules to avoid the implicit
>pops, but this is definitely one of yacc's weaker areas. -John]


There have been suggestions by John and in another response.


However, a valid choice, especially nowadays, could be just using some
kind of garbage collection. Maybe Boehm's GC could help, but maybe
even a language switch, e.g. to a ML dialect; especially ML seems to
have some history of writing compilers or code generators in that
language family among the strongly typed (mostly) functional
languages.


Kind regards,


Hannah.

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