Re: type clash on default action errors

[Hans Aberg]

At 14.19 +0200 0-10-26, Akim Demaille wrote:
>When you write things like:
>
>exp:    NUM;
>
>then Bison reads it as
>
>exp: NUM { $$ = $1; };
>
>since that the default actiob.

Actually, I think that the Bison default should be that there is no such
default action, because in the cases were I have forgotten to put in an
action, say on an empty rule, it has screwed up the parsing.

So if an action is not supplied, that should be an error. Then Bison should
have special options that allows one to use the old defaults, and to check
the grammar.

  Hans Aberg
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