dyaml/doc/html/api/dyaml.resolver.html
2011-10-29 21:57:36 +02:00

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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(in const(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>const(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>, in 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. |
Page generated by Autodoc and <a href="http://www.digitalmars.com/d/2.0/ddoc.html">Ddoc</a>.
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