Inherited attributes in bison/yacc -

how can use inherited attributes in bison/yacc ?
say, have grammar -
program -> stmts

what wanted in bison :
program : stmts {$$.next = newlabel(); $1.next = $$.next; }

here next attribute declared in structure , type added union.

in btyacc can use:

program: stmts(newlabel()) { $$.next = $1.next; }  stmts($arg) : .... { $$.next = $arg; ... } 

to sort of thing. equivalent to

program: { $<tag>$ = newlabel()); } stmts { $$.next = $1.next; }  stmts: .... { $$.next = $<tag>0; ... } 

in bison (or yacc), more type-safe. you'll need right %union , %type declarations in either case.