dyaml/doc/html/api/dyaml.resolver.html
Ferdinand Majerech 9596806644 Red-Black Trees are now used for duplicate detection, and planned
to be used for unordered map storage. This is because AAs still
don't work correctly and even if they did, require the user to
define both toHash and opCmp/opEquals for every YAML
struct/class. Now only opCmp needs to be defined.
Documentation/tutorials/examples have been updated accordingly.
2012-01-23 15:57:26 +01:00

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<h1>dyaml.resolver</h1>
<!-- Generated by Ddoc from dyaml/resolver.d -->
<p>Implements a class that resolves YAML tags. This can be used to implicitly
resolve tags for custom data types, removing the need to explicitly
specify tags in YAML. A tutorial can be found
<a href="../tutorials/custom_types.html">here</a>.
</p>
<p>Code based on <a href="http://www.pyyaml.org">PyYAML</a>.</p>
<dl><dt class="d_decl">class <a name="Resolver"></a><span class="ddoc_psymbol">Resolver</span>;
</dt>
<dd><p>Resolves YAML tags (data types).
</p>
<p>Can be used to implicitly resolve custom data types of scalar values.</p>
<dl><dt class="d_decl">this(bool <b>defaultImplicitResolvers</b> = true);
</dt>
<dd><p>Construct a Resolver.
</p>
<p>If you don't want to implicitly resolve default YAML tags/data types,
you can use <b>defaultImplicitResolvers</b> to disable default resolvers.
</p>
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>bool <b>defaultImplicitResolvers</b></td>
<td valign=top>Use default YAML implicit resolvers?</td></tr>
</table></div>
</dd>
<dt class="d_decl">void <a name="addImplicitResolver"></a><span class="ddoc_psymbol">addImplicitResolver</span>(string <b>tag</b>, Regex!(char) <b>regexp</b>, string <b>first</b>);
</dt>
<dd><p>Add an implicit scalar resolver.
</p>
<p>If a scalar matches <b>regexp</b> and starts with any character in <b>first</b>,
its tag is set to <b>tag</b>. If it matches more than one resolver regexp
resolvers added first override ones added later. Default resolvers
override any user specified resolvers, but they can be disabled in
Resolver constructor.
<br>
If a scalar is not resolved to anything, it is assigned the default
YAML tag for strings.
</p>
<b>Parameters:</b><div class="pbr"><table class=parms><tr><td valign=top>string <b>tag</b></td>
<td valign=top>Tag to resolve to.</td></tr>
<tr><td valign=top>Regex!(char) <b>regexp</b></td>
<td valign=top>Regular expression the scalar must match to have this tag.</td></tr>
<tr><td valign=top>string <b>first</b></td>
<td valign=top>String of possible starting characters of the scalar.</td></tr>
</table></div>
<b>Examples:</b><div class="pbr">Resolve scalars starting with 'A' to !tag :
<pre class="d_code"> <span class="d_keyword">import</span> std.regex;
<span class="d_keyword">import</span> yaml;
<span class="d_keyword">void</span> main()
{
<span class="d_keyword">auto</span> loader = Loader(<span class="d_string">"file.txt"</span>);
<span class="d_keyword">auto</span> resolver = <span class="d_keyword">new</span> Resolver();
resolver.<span class="d_psymbol">addImplicitResolver</span>(<span class="d_string">"!tag"</span>, std.regex.regex(<span class="d_string">"A.*"</span>), <span class="d_string">"A"</span>);
loader.resolver = resolver;
<span class="d_comment">//Note that we have no constructor from tag "!tag", so we can't
</span> <span class="d_comment">//actually load anything that resolves to this tag.
</span> <span class="d_comment">//See Constructor API documentation and tutorial for more information.
</span>
<span class="d_keyword">auto</span> node = loader.load();
}
</pre>
</div>
</dd>
<dt class="d_decl">package const @property Tag <a name="defaultScalarTag"></a><span class="ddoc_psymbol">defaultScalarTag</span>();
</dt>
<dd><p>Return default scalar tag.</p>
</dd>
<dt class="d_decl">package const @property Tag <a name="defaultSequenceTag"></a><span class="ddoc_psymbol">defaultSequenceTag</span>();
</dt>
<dd><p>Return default sequence tag.</p>
</dd>
<dt class="d_decl">package const @property Tag <a name="defaultMappingTag"></a><span class="ddoc_psymbol">defaultMappingTag</span>();
</dt>
<dd><p>Return default mapping tag.</p>
</dd>
</dl>
</dd>
</dl>
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Copyright &copy; Ferdinand Majerech 2011. Based on <a href="http://www.pyyaml.org">PyYAML</a> by Kirill Simonov. |
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