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More lambda support - for optional lambda declarators

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/branches/gsoc2009-matevz@13859 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2012-10-04 06:01:38 +00:00
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Doc/Manual/Cpp0x.html
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@ -217,14 +217,29 @@ ignores it.</p>
<H3><a name="Cpp0x_Lambda_functions_and_expressions"></a>7.2.8 Lambda functions and expressions</H3>
<p>SWIG correctly parses the Lambda functions syntax. For example:</p>
<p>SWIG correctly parses most of the Lambda functions syntax. For example:</p>
<div class="code"><pre>
auto val = [] { return something; };
auto sum = [](int x, int y) { return x+y; };
auto sum = [](int x, int y) -&gt; int { return x+y; };
</pre></div>
<p>The lambda functions are removed from the wrapper class for now, because of the lack of support
for closures (scope of the lambda functions) in the target languages.</p>
<p>
Lambda functions used to create variables can also be parsed, but due to limited support of <tt>auto</tt> when
the type is deduced from the expression, the variables are simply ignored.
</p>
<div class="code"><pre>
auto six = [](int x, int y) { return x+y; }(4, 2);
</pre></div>
<p>
Better support should be available in a later release.
</p>
<H3><a name="Cpp0x_Alternate_function_syntax"></a>7.2.9 Alternate function syntax</H3>