Ambiguous Grammar

[Ramaswamy]

Hi,

    I have been working on a grammar (quite ambiguous) using bison ver 1.875 and am using the GLR parsing option. Bison reports an ambiguity in the same production. It goes somethin like this -

---

List    : Element

        | List Element

        ;

---

 

    The problem is that since Element can match "IDENTIFIER", " IDENTIFIER '{' IDENTIFIER '}' " and " '{' IDENTIFIER '}' ", the NT's List and Element can be combined in different ways and when I give a %merge for that prdn the parser just hangs. Any cue as to how to tackle this problem?

 

Regds
Ram
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