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<div class="titlepage"><div><div><h3 class="title">
<a name="lambda.parameter_and_return_types"></a>Parameter and return types of lambda functors</h3></div></div></div>
<p>
	During the invocation of a lambda functor, the actual arguments are substituted for the placeholders. 
	The placeholders do not dictate the type of these actual arguments.
	The basic rule is that a lambda function can be called with arguments of any types, as long as the lambda expression with substitutions performed is a valid