547 lines
21 KiB
HTML
547 lines
21 KiB
HTML
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<title>dyaml.node - D:YAML 0.3 API documentation</title>
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<img id="logo" alt="D:YAML logo" src="images/logo.png"><a id="main-heading" href="index.html">D:YAML 0.3 API documentation</a>
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<div id="content">
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<h1>dyaml.node</h1>
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<!-- Generated by Ddoc from dyaml/node.d -->
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<p>Node of a YAML document. Used to read YAML data once it's loaded,
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and to prepare data to emit.</p>
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<dl><dt class="d_decl">class <a name="NodeException"></a><span class="ddoc_psymbol">NodeException</span>: dyaml.exception.YAMLException;
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</dt>
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<dd><p>Exception thrown at node related errors.</p>
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</dd>
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<dt class="d_decl">struct <a name="YAMLNull"></a><span class="ddoc_psymbol">YAMLNull</span>;
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</dt>
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<dd><p>Null YAML type. Used in nodes with null values.</p>
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</dd>
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<dt class="d_decl">struct <a name="Node"></a><span class="ddoc_psymbol">Node</span>;
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</dt>
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<dd><p>YAML node.
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</p>
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<p>This is a pseudo-dynamic type that can store any YAML value, including a
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sequence or mapping of nodes. You can get data from a <a name="Node"></a><span class="ddoc_psymbol">Node</span> directly or
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iterate over it if it's a collection.</p>
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<dl><dt class="d_decl">struct <a name="Pair"></a><span class="ddoc_psymbol">Pair</span>;
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</dt>
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<dd><p>Key-value pair of YAML nodes, used in mappings.</p>
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<dl><dt class="d_decl">Node <a name="key"></a><span class="ddoc_psymbol">key</span>;
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</dt>
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<dd><p>Key node.</p>
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</dd>
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<dt class="d_decl">Node <a name="value"></a><span class="ddoc_psymbol">value</span>;
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</dt>
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<dd><p>Value node.</p>
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</dd>
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<dt class="d_decl">this(K, V)(K <b>key</b>, V <b>value</b>);
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</dt>
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<dd><p>Construct a Pair from two values. Will be converted to Nodes if needed.</p>
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</dd>
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<dt class="d_decl">bool <a name="equals"></a><span class="ddoc_psymbol">equals</span>(ref Pair <b>rhs</b>);
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</dt>
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<dd><p>Equality test with another Pair.</p>
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</dd>
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</dl>
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</dd>
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<dt class="d_decl">package ScalarStyle <a name="scalarStyle"></a><span class="ddoc_psymbol">scalarStyle</span>;
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</dt>
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<dd><p>Node scalar style. Used to remember style this node was loaded with.</p>
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</dd>
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<dt class="d_decl">package CollectionStyle <a name="collectionStyle"></a><span class="ddoc_psymbol">collectionStyle</span>;
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</dt>
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<dd><p>Node collection style. Used to remember style this node was loaded with.</p>
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</dd>
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<dt class="d_decl">this(T)(T <b>value</b>, in string <b>tag</b> = null);
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</dt>
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<dd><p>Construct a Node from a value.
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</p>
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<p>Any type except of Node can be stored in a Node, but default YAML
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types (integers, floats, strings, timestamps, etc.) will be stored
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more efficiently.
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<br>
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<br>
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Note that to emit any non-default types you store
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in a node, you need a Representer to represent them in YAML -
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otherwise emitting will fail.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>value</td>
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<td valign=top>Value to store in the node.</td></tr>
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<tr><td valign=top>tag</td>
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<td valign=top>Overrides tag of the node when emitted, regardless
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of tag determined by Representer. Representer uses
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this to determine YAML data type when a D data type
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maps to multiple different YAML data types. Tag must
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be in full form, e.g. "tag:yaml.org,2002:int", not
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a shortcut, like "!!int".</td></tr>
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</table></div>
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</dd>
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<dt class="d_decl">this(T)(T[] <b>array</b>, in string <b>tag</b> = null);
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</dt>
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<dd><p>Construct a node from an array.
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</p>
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<p>If array is an array of nodes or pairs, it is stored directly.
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Otherwise, every value in the array is converted to a node, and
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those nodes are stored.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>array</td>
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<td valign=top>Values to store in the node.</td></tr>
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<tr><td valign=top>tag</td>
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<td valign=top>Overrides tag of the node when emitted, regardless
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of tag determined by Representer. Representer uses
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this to determine YAML data type when a D data type
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maps to multiple different YAML data types.
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This is used to differentiate between YAML sequences
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("!!seq") and sets ("!!set"), which both are
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internally represented as an array_ of nodes. Tag
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must be in full form, e.g. "tag:yaml.org,2002:set",
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not a shortcut, like "!!set".</td></tr>
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</table></div>
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<b>Examples:</b><div class="pbr"><pre class="d_code"> <span class="d_comment">//Will be emitted as a sequence (default for arrays)
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</span> <span class="d_keyword">auto</span> seq = Node([1, 2, 3, 4, 5]);
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<span class="d_comment">//Will be emitted as a set (overriden tag)
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</span> <span class="d_keyword">auto</span> set = Node([1, 2, 3, 4, 5], <span class="d_string">"tag:yaml.org,2002:set"</span>);
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</pre>
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</div>
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</dd>
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<dt class="d_decl">this(K, V)(V[K] <b>array</b>, in string <b>tag</b> = null);
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</dt>
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<dd><p>Construct a node from an associative array.
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</p>
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<p>If keys and/or values of array are nodes, they stored directly.
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Otherwise they are converted to nodes and then stored.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>array</td>
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<td valign=top>Values to store in the node.</td></tr>
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<tr><td valign=top>tag</td>
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<td valign=top>Overrides tag of the node when emitted, regardless
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of tag determined by Representer. Representer uses
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this to determine YAML data type when a D data type
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maps to multiple different YAML data types.
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This is used to differentiate between YAML unordered
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mappings ("!!map"), ordered mappings ("!!omap"), and
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pairs ("!!pairs") which are all internally
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represented as an array of node pairs. Tag must be
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in full form, e.g. "tag:yaml.org,2002:omap", not a
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shortcut, like "!!omap".</td></tr>
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</table></div>
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<b>Examples:</b><div class="pbr"><pre class="d_code"> <span class="d_comment">//Will be emitted as an unordered mapping (default for mappings)
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</span> <span class="d_keyword">auto</span> map = Node([1 : <span class="d_string">"a"</span>, 2 : <span class="d_string">"b"</span>]);
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<span class="d_comment">//Will be emitted as an ordered map (overriden tag)
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</span> <span class="d_keyword">auto</span> omap = Node([1 : <span class="d_string">"a"</span>, 2 : <span class="d_string">"b"</span>], <span class="d_string">"tag:yaml.org,2002:omap"</span>);
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<span class="d_comment">//Will be emitted as pairs (overriden tag)
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</span> <span class="d_keyword">auto</span> pairs = Node([1 : <span class="d_string">"a"</span>, 2 : <span class="d_string">"b"</span>], <span class="d_string">"tag:yaml.org,2002:pairs"</span>);
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</pre>
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</div>
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</dd>
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<dt class="d_decl">this(K, V)(K[] <b>keys</b>, V[] <b>values</b>, in string <b>tag</b> = null);
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</dt>
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<dd><p>Construct a node from arrays of keys and values.
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</p>
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<p>Constructs a mapping node with key-value pairs from
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keys and values, keeping their order. Useful when order
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is important (ordered maps, pairs).
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<br>
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<br>
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keys and values must have equal length.
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<br>
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<br>
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If keys and/or values are nodes, they are stored directly/
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Otherwise they are converted to nodes and then stored.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>keys</td>
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<td valign=top>Keys of the mapping, from first to last pair.</td></tr>
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<tr><td valign=top>values</td>
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<td valign=top>Values of the mapping, from first to last pair.</td></tr>
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<tr><td valign=top>tag</td>
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<td valign=top>Overrides tag of the node when emitted, regardless
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of tag determined by Representer. Representer uses
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this to determine YAML data type when a D data type
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maps to multiple different YAML data types.
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This is used to differentiate between YAML unordered
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mappings ("!!map"), ordered mappings ("!!omap"), and
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pairs ("!!pairs") which are all internally
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represented as an array of node pairs. Tag must be
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in full form, e.g. "tag:yaml.org,2002:omap", not a
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shortcut, like "!!omap".</td></tr>
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</table></div>
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<b>Examples:</b><div class="pbr"><pre class="d_code"> <span class="d_comment">//Will be emitted as an unordered mapping (default for mappings)
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</span> <span class="d_keyword">auto</span> map = Node([1, 2], [<span class="d_string">"a"</span>, <span class="d_string">"b"</span>]);
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<span class="d_comment">//Will be emitted as an ordered map (overriden tag)
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</span> <span class="d_keyword">auto</span> omap = Node([1, 2], [<span class="d_string">"a"</span>, <span class="d_string">"b"</span>], <span class="d_string">"tag:yaml.org,2002:omap"</span>);
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<span class="d_comment">//Will be emitted as pairs (overriden tag)
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</span> <span class="d_keyword">auto</span> pairs = Node([1, 2], [<span class="d_string">"a"</span>, <span class="d_string">"b"</span>], <span class="d_string">"tag:yaml.org,2002:pairs"</span>);
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</pre>
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</div>
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</dd>
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<dt class="d_decl">const @property bool <a name="isValid"></a><span class="ddoc_psymbol">isValid</span>();
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</dt>
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<dd><p>Is this node valid (initialized)? </p>
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</dd>
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<dt class="d_decl">const @property bool <a name="isScalar"></a><span class="ddoc_psymbol">isScalar</span>();
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</dt>
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<dd><p>Is this node a scalar value?</p>
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</dd>
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<dt class="d_decl">const @property bool <a name="isSequence"></a><span class="ddoc_psymbol">isSequence</span>();
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</dt>
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<dd><p>Is this node a sequence?</p>
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</dd>
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<dt class="d_decl">const @property bool <a name="isMapping"></a><span class="ddoc_psymbol">isMapping</span>();
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</dt>
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<dd><p>Is this node a mapping?</p>
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</dd>
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<dt class="d_decl">const @property bool <a name="isUserType"></a><span class="ddoc_psymbol">isUserType</span>();
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</dt>
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<dd><p>Is this node a user defined type?</p>
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</dd>
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<dt class="d_decl">const @property string <a name="tag"></a><span class="ddoc_psymbol">tag</span>();
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</dt>
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<dd><p>Return <a name="tag"></a><span class="ddoc_psymbol">tag</span> of the node.</p>
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</dd>
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<dt class="d_decl">bool <a name="opEquals"></a><span class="ddoc_psymbol">opEquals</span>(T)(ref T <b>rhs</b>);
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</dt>
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<dd><p>Equality test.
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</p>
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<p>If T is Node, recursively compare all subnodes.
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This might be quite expensive if testing entire documents.
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<br>
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If T is not Node, convert the node to T and test equality with that.
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</p>
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<b>Examples:</b><div class="pbr"><pre class="d_code"> <span class="d_keyword">auto</span> node = Node(42);
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<span class="d_keyword">assert</span>(node == 42);
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<span class="d_keyword">assert</span>(node == <span class="d_string">"42"</span>);
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<span class="d_keyword">assert</span>(node != <span class="d_string">"43"</span>);
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</pre>
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</div>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>rhs</td>
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<td valign=top>Variable to test equality with.</td></tr>
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</table></div>
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<b>Returns:</b><div class="pbr"><b>true</b> if equal, <b>false</b> otherwise.</div>
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</dd>
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<dt class="d_decl">alias <a name="as"></a><span class="ddoc_psymbol">as</span>;
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</dt>
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<dd><p>Shortcut for get().</p>
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</dd>
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<dt class="d_decl">T <a name="get"></a><span class="ddoc_psymbol">get</span>(T)();
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</dt>
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<dd><p>Get the value of the node as specified type.
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</p>
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<p>If the specifed type does not match type in the node,
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conversion is attempted.
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<br>
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Numeric values are range checked, throwing if out of range of
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requested type.
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<br>
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Timestamps are stored as std.datetime.SysTime.
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Binary values are decoded and stored as ubyte[].
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<br>
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<br><b>Mapping default values:</b>
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<br>
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<div class="pbr">The '=' key can be used to denote the default value of a mapping.
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This can be used when a node is scalar in early versions of a program,
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but is replaced by a mapping later. Even if the node is a mapping, the
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<a name="get"></a><span class="ddoc_psymbol">get</span> method can be used as if it was a scalar if it has a default value.
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This way, new YAML files where the node is a mapping can still be read
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by old versions of the program, which expect the node to be a scalar.
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</div>
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</p>
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<b>Examples:</b><div class="pbr">Automatic type conversion:
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<pre class="d_code"> <span class="d_keyword">auto</span> node = Node(42);
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<span class="d_keyword">assert</span>(node.as!<span class="d_keyword">int</span> == 42);
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<span class="d_keyword">assert</span>(node.as!string == <span class="d_string">"42"</span>);
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<span class="d_keyword">assert</span>(node.as!<span class="d_keyword">double</span> == 42.0);
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</pre>
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</div>
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<b>Returns:</b><div class="pbr">Value of the node as specified type.
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</div>
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<b>Throws:</b><div class="pbr">NodeException if unable to convert to specified type, or if
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the value is out of range of requested type.</div>
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</dd>
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<dt class="d_decl">void <a name="getToVar"></a><span class="ddoc_psymbol">getToVar</span>(T)(out T <b>target</b>);
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</dt>
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<dd><p>Write the value of the node to target.
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</p>
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<p>If the target type does not match node type,
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conversion is attempted.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>target</td>
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<td valign=top>Variable to write to.</td></tr>
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</table></div>
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<b>Throws:</b><div class="pbr">NodeException if unable to convert to specified type.</div>
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</dd>
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<dt class="d_decl">@property size_t <a name="length"></a><span class="ddoc_psymbol">length</span>();
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</dt>
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<dd><p>If this is a collection, return its length.
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</p>
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<p>Otherwise, throw NodeException.
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</p>
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<b>Returns:</b><div class="pbr">Number of elements in a sequence or key-value pairs in a mapping.
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</div>
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<b>Throws:</b><div class="pbr">NodeException if this is not a sequence nor a mapping.</div>
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</dd>
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<dt class="d_decl">Node <a name="opIndex"></a><span class="ddoc_psymbol">opIndex</span>(T)(T <b>index</b>);
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</dt>
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<dd><p>Get the element at specified index.
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</p>
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<p>If the node is a sequence, index must be integral.
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<br>
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<br>
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If the node is a mapping, return the value corresponding to the first
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key equal to index, even after conversion. I.e; node["12"] will
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return value of the first key that equals "12", even if it's an integer.
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</p>
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<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>index</td>
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<td valign=top>Index to use.</td></tr>
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</table></div>
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<b>Returns:</b><div class="pbr">Value corresponding to the index.
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</div>
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<b>Throws:</b><div class="pbr">NodeException if the index could not be found,
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non-integral index is used with a sequence or the node is
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not a collection.</div>
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</dd>
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<dt class="d_decl">void <a name="opIndexAssign"></a><span class="ddoc_psymbol">opIndexAssign</span>(K, V)(V <b>value</b>, K <b>index</b>);
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</dt>
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<dd><p>Set element at specified index in a collection.
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</p>
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<p>This method can only be called on collection nodes.
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<br>
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If the node is a sequence, index must be integral.
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<br>
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If the node is a mapping, sets the value corresponding to the first
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key matching index (including conversion, so e.g. "42" matches 42).
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<br>
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If the node is a mapping and no key matches index, a new key-value
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pair is added to the mapping. In sequences the index must be in
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range. This ensures behavior siilar to D arrays and associative
|
|
arrays.
|
|
|
|
</p>
|
|
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>index</td>
|
|
<td valign=top>Index of the value to set.</td></tr>
|
|
</table></div>
|
|
<b>Throws:</b><div class="pbr">NodeException if the node is not a collection, index is out
|
|
of range or if a non-integral index is used on a sequence node.</div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">int <a name="opApply"></a><span class="ddoc_psymbol">opApply</span>(T)(int delegate(ref T) <b>dg</b>);
|
|
</dt>
|
|
<dd><p>Iterate over a sequence, getting each element as T.
|
|
</p>
|
|
<p>If T is Node, simply iterate over the nodes in the sequence.
|
|
Otherwise, convert each node to T during iteration.
|
|
|
|
</p>
|
|
<b>Throws:</b><div class="pbr">NodeException if the node is not a sequence or an
|
|
element could not be converted to specified type.</div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">int <a name="opApply"></a><span class="ddoc_psymbol">opApply</span>(K, V)(int delegate(ref K, ref V) <b>dg</b>);
|
|
</dt>
|
|
<dd><p>Iterate over a mapping, getting each key/value as K/V.
|
|
</p>
|
|
<p>If the K and/or V is Node, simply iterate over the nodes in the mapping.
|
|
Otherwise, convert each key/value to T during iteration.
|
|
|
|
</p>
|
|
<b>Throws:</b><div class="pbr">NodeException if the node is not a mapping or an
|
|
element could not be converted to specified type.</div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">void <a name="add"></a><span class="ddoc_psymbol">add</span>(T)(T <b>value</b>);
|
|
</dt>
|
|
<dd><p>Add an element to a sequence.
|
|
</p>
|
|
<p>This method can only be called on sequence nodes.
|
|
<br>
|
|
|
|
If value is a node, it is copied to the sequence directly. Otherwise
|
|
value is converted to a node and then stored in the sequence.
|
|
<br>
|
|
|
|
<p>When emitting, all values in the sequence will be emitted. When
|
|
using the !!set tag, the user needs to ensure that all elements in
|
|
the sequence are unique, otherwise <b>invalid</b> YAML code will be
|
|
emitted.</p>
|
|
|
|
</p>
|
|
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>value</td>
|
|
<td valign=top>Value to add to the sequence.</td></tr>
|
|
</table></div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">void <a name="add"></a><span class="ddoc_psymbol">add</span>(K, V)(K <b>key</b>, V <b>value</b>);
|
|
</dt>
|
|
<dd><p>Add a key-value pair to a mapping.
|
|
</p>
|
|
<p>This method can only be called on mapping nodes.
|
|
<br>
|
|
|
|
If key and/or value is a node, it is copied to the mapping directly.
|
|
Otherwise it is converted to a node and then stored in the mapping.
|
|
<br>
|
|
|
|
<p>It is possible for the same key to be present more than once in a
|
|
mapping. When emitting, all key-value pairs will be emitted.
|
|
This is useful with the "!!pairs" tag, but will result in
|
|
<b>invalid</b> YAML with "!!map" and "!!omap" tags.</p>
|
|
|
|
</p>
|
|
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>key</td>
|
|
<td valign=top>Key to add.</td></tr>
|
|
<tr><td valign=top>value</td>
|
|
<td valign=top>Value to add.</td></tr>
|
|
</table></div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">void <a name="remove"></a><span class="ddoc_psymbol">remove</span>(T)(T <b>value</b>);
|
|
</dt>
|
|
<dd><p>Remove first (if any) occurence of a value in a collection.
|
|
</p>
|
|
<p>This method can only be called on collection nodes.
|
|
<br>
|
|
|
|
If the node is a sequence, the first node matching value (including
|
|
conversion, so e.g. "42" matches 42) is removed.
|
|
If the node is a mapping, the first key-value pair where value
|
|
matches specified value is removed.
|
|
|
|
</p>
|
|
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>value</td>
|
|
<td valign=top>Value to remove.</td></tr>
|
|
</table></div>
|
|
<b>Throws:</b><div class="pbr">NodeException if the node is not a collection.</div>
|
|
|
|
</dd>
|
|
<dt class="d_decl">void <a name="removeAt"></a><span class="ddoc_psymbol">removeAt</span>(T)(T <b>index</b>);
|
|
</dt>
|
|
<dd><p>Remove element at the specified index of a collection.
|
|
</p>
|
|
<p>This method can only be called on collection nodes.
|
|
<br>
|
|
|
|
If the node is a sequence, index must be integral.
|
|
<br>
|
|
|
|
If the node is a mapping, remove the first key-value pair where
|
|
key matches index (including conversion, so e.g. "42" matches 42).
|
|
<br>
|
|
|
|
If the node is a mapping and no key matches index, nothing is removed
|
|
and no exception is thrown. This ensures behavior siilar to D arrays
|
|
and associative arrays.
|
|
|
|
</p>
|
|
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>index</td>
|
|
<td valign=top>Index to remove at.</td></tr>
|
|
</table></div>
|
|
<b>Throws:</b><div class="pbr">NodeException if the node is not a collection, index is out
|
|
of range or if a non-integral index is used on a sequence node.</div>
|
|
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
</dl>
|
|
|
|
</div>
|
|
|
|
<div id="copyright">
|
|
Copyright © 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>.
|
|
</div>
|
|
|
|
</body>
|
|
</html>
|