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<h1>dyaml.constructor</h1>
<!-- Generated by Ddoc from dyaml/constructor.d -->
<p>Implements a class that processes YAML mappings, sequences and scalars into
nodes. This can be used to implement custom data types. A tutorial can be
found <a href="../tutorials/custom_types.html">here</a>.</p>
<dl><dt class="d_decl">class <a name="ConstructorException"></a><span class="ddoc_psymbol">ConstructorException</span>: dyaml.exception.YAMLException;
</dt>
<dd><p>Exception thrown at constructor errors.
</p>
<p>Can be thrown by custom constructor functions.</p>
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<dl><dt class="d_decl">this(string <b>msg</b>, Mark <b>start</b>, Mark <b>end</b>, string <b>file</b> = __FILE__, int <b>line</b> = __LINE__);
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</dt>
<dd><p>Construct a ConstructorException.
</p>
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>string <b>msg</b></td>
<td valign=top>Error message.</td></tr>
<tr><td valign=top>Mark <b>start</b></td>
<td valign=top>Start position of the error context.</td></tr>
<tr><td valign=top>Mark <b>end</b></td>
<td valign=top>End position of the error context.</td></tr>
</table></div>
</dd>
</dl>
</dd>
<dt class="d_decl">class <a name="Constructor"></a><span class="ddoc_psymbol">Constructor</span>;
</dt>
<dd><p>Constructs YAML values.
</p>
<p>Each YAML scalar, sequence or mapping has a tag specifying its data type.
<a name="Constructor"></a><span class="ddoc_psymbol">Constructor</span> uses user-specifyable functions to create a node of desired
data type from a scalar, sequence or mapping.
<br>
Each of these functions is associated with a tag, and can process either
a scalar, a sequence, or a mapping. The constructor passes each value to
the function with corresponding tag, which then returns the resulting value
that can be stored in a node.
<br>
If a tag is detected with no known constructor function, it is considered an error.</p>
<dl><dt class="d_decl">this(in bool <b>defaultConstructors</b> = true);
</dt>
<dd><p>Construct a Constructor.
</p>
<p>If you don't want to support default YAML tags/data types, you can use
<b>defaultConstructors</b> to disable constructor functions for these.
</p>
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>bool <b>defaultConstructors</b></td>
<td valign=top>Use constructors for default YAML tags?</td></tr>
</table></div>
</dd>
<dt class="d_decl">void <a name="addConstructor"></a><span class="ddoc_psymbol">addConstructor</span>(T, U)(in string <b>tag</b>, T function(Mark, Mark, U) <b>ctor</b>);
</dt>
<dd><p>Add a constructor function.
</p>
<p>The function passed must two Marks (determining start and end positions of
the node in file) and either a string (if constructing from scalar),
an array of Nodes (from sequence) or an array of Node.Pair (from mapping).
The value returned by this function will be stored in the resulring node.
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<br>
Only one constructor function can be set for one tag.
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</p>
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>tag</td>
<td valign=top>Tag for the function to handle.</td></tr>
<tr><td valign=top>ctor</td>
<td valign=top>Constructor function.</td></tr>
</table></div>
</dd>
</dl>
</dd>
<dt class="d_decl">YAMLNull <a name="constructNull"></a><span class="ddoc_psymbol">constructNull</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a <b>null</b> node.</p>
</dd>
<dt class="d_decl">YAMLMerge <a name="constructMerge"></a><span class="ddoc_psymbol">constructMerge</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a merge node - a node that merges another node into a mapping.</p>
</dd>
<dt class="d_decl">bool <a name="constructBool"></a><span class="ddoc_psymbol">constructBool</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a boolean node.</p>
</dd>
<dt class="d_decl">long <a name="constructLong"></a><span class="ddoc_psymbol">constructLong</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct an integer (long) node.</p>
</dd>
<dt class="d_decl">real <a name="constructReal"></a><span class="ddoc_psymbol">constructReal</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a floating point (real) node.</p>
</dd>
<dt class="d_decl">ubyte[] <a name="constructBinary"></a><span class="ddoc_psymbol">constructBinary</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a binary (base64) node.</p>
</dd>
<dt class="d_decl">SysTime <a name="constructTimestamp"></a><span class="ddoc_psymbol">constructTimestamp</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a timestamp (SysTime) node.</p>
</dd>
<dt class="d_decl">string <a name="constructString"></a><span class="ddoc_psymbol">constructString</span>(Mark <b>start</b>, Mark <b>end</b>, string <b>value</b>);
</dt>
<dd><p>Construct a string node.</p>
</dd>
<dt class="d_decl">Pair[] <a name="getPairs"></a><span class="ddoc_psymbol">getPairs</span>(string <b>type</b>, Mark <b>start</b>, Mark <b>end</b>, Node[] <b>nodes</b>);
</dt>
<dd><p>Convert a sequence of single-element mappings into a sequence of pairs.</p>
</dd>
<dt class="d_decl">Pair[] <a name="constructOrderedMap"></a><span class="ddoc_psymbol">constructOrderedMap</span>(Mark <b>start</b>, Mark <b>end</b>, Node[] <b>nodes</b>);
</dt>
<dd><p>Construct an ordered map (ordered sequence of key:value pairs without duplicates) node.</p>
</dd>
<dt class="d_decl">Pair[] <a name="constructPairs"></a><span class="ddoc_psymbol">constructPairs</span>(Mark <b>start</b>, Mark <b>end</b>, Node[] <b>nodes</b>);
</dt>
<dd><p>Construct a pairs (ordered sequence of key: value pairs allowing duplicates) node.</p>
</dd>
<dt class="d_decl">Node[] <a name="constructSet"></a><span class="ddoc_psymbol">constructSet</span>(Mark <b>start</b>, Mark <b>end</b>, Pair[] <b>pairs</b>);
</dt>
<dd><p>Construct a set node.</p>
</dd>
<dt class="d_decl">Node[] <a name="constructSequence"></a><span class="ddoc_psymbol">constructSequence</span>(Mark <b>start</b>, Mark <b>end</b>, Node[] <b>nodes</b>);
</dt>
<dd><p>Construct a sequence (array) node.</p>
</dd>
<dt class="d_decl">Pair[] <a name="constructMap"></a><span class="ddoc_psymbol">constructMap</span>(Mark <b>start</b>, Mark <b>end</b>, Pair[] <b>pairs</b>);
</dt>
<dd><p>Construct an unordered map (unordered set of key: value pairs without duplicates) node.</p>
</dd>
</dl>
</div>
<div id="copyright">
Copyright &copy; Ferdinand Majerech 2011. Based on <a href="http://www.pyyaml.org">PyYAML</a> by Kirill Simonov. |
Page generated by Autodoc and <a href="http://www.digitalmars.com/d/2.0/ddoc.html">Ddoc</a>.
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