Re: using yacc union in managed c++

"ras" <rastrahm@yahoo.com> wrote in news:07-04-032@comp.compilers:
> Is there a way to implement the union in a managed c++ yacc parser?
> visual studio compiler complains about the union, so for strings i
> created an array and returned the index of the string via yylval. but
> i need to return operators, floating point numbers, etc. and this
> seems klutzy. got any better ideas?


There are basically two choices -- you either ensure that the union is
a valid POD type (all the fields are types that don't have constructors or
destructors), or you can not use the %union directive at all and instead
#define YYSTYPE to be some non-union type (usually some kind of smart
pointer type).


Chris Dodd
cdodd@acm.org

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