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Re: RFC: generate the default semantic action
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From: |
Hans Åberg |
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Subject: |
Re: RFC: generate the default semantic action |
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Date: |
Sun, 14 Oct 2018 15:45:56 +0200 |
> On 14 Oct 2018, at 12:23, Akim Demaille <address@hidden> wrote:
>
> This patch is prompted by C++, but I believe it’s a real improvement
> even for the other languages. However, it does mean that the default
> action is now made twice in C for instance. I would very much like
> to disable the pre-initialization of $$ to $1, but I’m afraid people
> might depend on this…
POSIX [1] uses an ambiguous formulation [2]:
By default, the value of a rule shall be the value of the first element in it.
1. http://pubs.opengroup.org/onlinepubs/9699919799/
2. http://pubs.opengroup.org/onlinepubs/9699919799/utilities/yacc.html
Re: RFC: generate the default semantic action, Paul Eggert, 2018/10/14