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<title>Utility Functions - Packrat Docs</title>
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<h2>Utility Functions</h2>
<a href="index.html">Return to Contents</a>
<p>These are intended as helper functions for use with <em>Satisfy</em> combinators and the like
when parsing ordinary strings.</p>
<table>
<tr>
<td><pre>
generic
Set : in Ada.Strings.Maps.Character_Set;
function In_Set
(Element : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is present within the given <em>Character_Set</em>.</td>
</tr>
<tr>
<td><pre>
generic
Set : in Ada.Strings.Maps.Character_Set;
function Not_In_Set
(Element : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is not present within the given <em>Character_Set</em>.</td>
</tr>
<tr>
<td><pre>
function Is_Digit
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is one of the digits 0 through 9.</td>
</tr>
<tr>
<td><pre>
function Is_Hex
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is one of the digits 0 through 9 or one of the letters
A through F, case insensitive.</td>
</tr>
<tr>
<td><pre>
function Is_Letter
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is one of the letters A through Z, case insensitive.</td>
</tr>
<tr>
<td><pre>
function Is_Alphanumeric
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is one of the digits 0 through 9 or one of the letters
A through Z, case insensitive.</td>
</tr>
<tr>
<td><pre>
function Is_Punctuation
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is one of the punctuation characters <em>! " # $ %
& ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~</em> which annoyingly
occupies several disjoint sections of ASCII.</td>
</tr>
<tr>
<td><pre>
function Is_ASCII
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is in the lower half of the ASCII character set.</td>
</tr>
<tr>
<td><pre>
function Is_Extended_ASCII
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is in the upper half of the ASCII character set.</td>
</tr>
<tr>
<td><pre>
function Is_Space
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is a space.</td>
</tr>
<tr>
<td><pre>
function Is_Linespace
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is a space or horizontal tab.</td>
</tr>
<tr>
<td><pre>
function Is_End_Of_Line
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is a linefeed or carriage return.</td>
</tr>
<tr>
<td><pre>
function Is_Whitespace
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is a space, horizontal tab, linefeed, or carriage return.</td>
</tr>
<tr>
<td><pre>
function Not_Whitespace
(Char : in Character)
return Boolean;
</pre></td>
<td>Tests whether a <em>Character</em> is not a space, horizontal tab, linefeed, or carriage return.</td>
</tr>
</table>
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