</p>

<p>
  A pattern that ends in "/" matches all paths that have it as a prefix, as always.
  To match the exact pattern including the trailing slash, end it with <code>{$}</code>,
  as in <code>/exact/match/{$}</code>.
</p>

<p>
  If two patterns overlap in the requests that they match, then the more specific pattern takes precedence.

</p>

<p>
In general, complex constants are a form of
<a href="#Constant_expressions">constant expression</a>
and are discussed in that section.
</p>

<p>
Numeric constants represent exact values of arbitrary precision and do not overflow.
Consequently, there are no constants denoting the IEEE 754 negative zero, infinity,
and not-a-number values.
</p>

<p>

</p>

<p>
In general, complex constants are a form of
<a href="#Constant_expressions">constant expression</a>
and are discussed in that section.
</p>

<p>
Numeric constants represent exact values of arbitrary precision and do not overflow.
Consequently, there are no constants denoting the IEEE 754 negative zero, infinity,
and not-a-number values.
</p>

<p>

high bit is set is rejected.
</p>

<h3 id="symbols">Symbols</h3>

<p>
Some symbols, such as <code>R1</code> or <code>LR</code>,
are predefined and refer to registers.
The exact set depends on the architecture.
</p>

<p>
There are four predeclared symbols that refer to pseudo-registers.
These are not real registers, but rather virtual registers maintained by