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<title>Bison 3.0.4: Precedence</title>
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<p>
Next: <a href="Contextual-Precedence.html#Contextual-Precedence" accesskey="n" rel="next">Contextual Precedence</a>, Previous: <a href="Shift_002fReduce.html#Shift_002fReduce" accesskey="p" rel="prev">Shift/Reduce</a>, Up: <a href="Algorithm.html#Algorithm" accesskey="u" rel="up">Algorithm</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index-of-Terms.html#Index-of-Terms" title="Index" rel="index">Index</a>]</p>
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<a name="Operator-Precedence-1"></a>
<h3 class="section">5.3 Operator Precedence</h3>
<a name="index-operator-precedence"></a>
<a name="index-precedence-of-operators"></a>
<p>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.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="Why-Precedence.html#Why-Precedence" accesskey="1">Why Precedence</a>:</td><td> </td><td align="left" valign="top">An example showing why precedence is needed.
</td></tr>
<tr><td align="left" valign="top">• <a href="Using-Precedence.html#Using-Precedence" accesskey="2">Using Precedence</a>:</td><td> </td><td align="left" valign="top">How to specify precedence and associativity.
</td></tr>
<tr><td align="left" valign="top">• <a href="Precedence-Only.html#Precedence-Only" accesskey="3">Precedence Only</a>:</td><td> </td><td align="left" valign="top">How to specify precedence only.
</td></tr>
<tr><td align="left" valign="top">• <a href="Precedence-Examples.html#Precedence-Examples" accesskey="4">Precedence Examples</a>:</td><td> </td><td align="left" valign="top">How these features are used in the previous example.
</td></tr>
<tr><td align="left" valign="top">• <a href="How-Precedence.html#How-Precedence" accesskey="5">How Precedence</a>:</td><td> </td><td align="left" valign="top">How they work.
</td></tr>
<tr><td align="left" valign="top">• <a href="Non-Operators.html#Non-Operators" accesskey="6">Non Operators</a>:</td><td> </td><td align="left" valign="top">Using precedence for general conflicts.
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