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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.
5.3.1 When Precedence is Needed An example showing why precedence is needed. 5.3.2 Specifying Operator Precedence How to specify precedence in Bison grammars. 5.3.3 Precedence Examples How these features are used in the previous example. 5.3.4 How Precedence Works How they work.
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