Re: type clash on default action errors

[Akim Demaille]

>>>>> "Bruce" == Bruce Haxton <address@hidden> writes:

Bruce> Hi, I am receiving the error 'type clash on default action'
Bruce> when I attempt to give my terminal tokens types. Why should
Bruce> this be so - I can find no reason for it in the documentation?

When you write things like:

exp:    NUM;

then Bison reads it as

exp: NUM { $$ = $1; };

since that the default actiob.  If the types of exp and NUM are
incompatible, then you have a type mismatch.