Lambda functions

Declares an unnamed function object

Syntax

[ Template:sparam ] ( Template:sparam ) -> Template:sparam		(C++11)
[ Template:sparam ] ( Template:sparam )		(C++11)

Explanation

capture	-	specifies which symbols visible in the scope where the function is declared will be visible inside the function body. A list of symbols can be passed as follows: [a,&b] where ''a'' is captured by value and ''b'' is captured by reference. [&] captures all symbols by reference [=] captures all by value [] captures nothing
params	-	The list of parameters, as in named functions
ret	-	Return type. If not present it's implied by the function return statements ( or void if it doesn't return any value)

Example 1

This example shows how to pass a lambda to a generic algorithm Template:example cpp

Example 2

Objects resulting from a lambda declaration, can be stored in std::function objects Template:example cpp

See also

function (C++11)

copyable wrapper of any copy constructible callable object (class template)