HELP needed with this s/r error

I hope somebody can help me overcome an s/r error in the grammar I have
constructed to parse a language. The language has the following
fragment:


      INDEX name [segment]
      [ , INDEX name [segment] ]...


      where segment refers to the fragment
            SEGMENT item [ , item ]...




The s/r error can be reproduced by the simplified YACC productions shown
below. The problem is caused by the occurrence of the ',' separator
used in both the list_index and list_item productions.


Could somebody help me rewrite the grammar to avoid the s/r error
please?


Seet Chern Hway
Information Technology Institute
email: chseet@iti.gov.sg




------------- start of grammar ------------


%token INDEX name SEGMENT item ','


%start fragment
%%


fragment
    : list_index
    ;


list_index
    : index
    | list_index ',' index
    ;


index
    : INDEX name SEGMENT list_item
    | INDEX name
    ;


list_item
    : item
    | list_item ',' item
    ;
-------------- end of grammar -------------
[Looks to me like this is LR(2) -- when it sees a comma it has to reduce one
rule or the other but it can't because it needs to look ahead and see if
there is an INDEX following. -John]
--

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