<p>Note that <ahref="https://developer.android.com/reference/java/util/regex/Pattern#DOTALL">dot all mode</a> is enabled to be able to match <ahref="https://tools.ietf.org/html/rfc2822#section-3.2.3">unfolded headers</a>.</p>
<p><br/></p>
<p><strong>Expressions</strong></p>
<p>Since version 1.2174 it is possible to use expression conditions, which is <ahref="#faq125">experimental</a> for now.</p>
<p>Please <ahref="https://ezylang.github.io/EvalEx/references/references.html">see here</a> about which constants, operators and functions are available.</p>
<p>The following extra variables are available:</p>