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Operator Precedence

   Another situation where shift/reduce conflicts appear is in
arithmetic expressions.  Here shifting is not always the preferred
resolution; the Bison declarations for operator precedence allow you to
specify when to shift and when to reduce.

* Why Precedence
An example showing why precedence is needed.
* Using Precedence
How to specify precedence in Bison grammars.
* Precedence Examples
How these features are used in the previous example.
* How Precedence
How they work.

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