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anonymous function

admin 11月 13, 2020 0

An anonymous function (also function literal or lambda abstraction) is a function definition that is not bound to an identifier.

C++ (since C++11)

C++11 provides support for anonymous functions, called lambda expressions. A lambda expression has the form:

[capture](parameters) -> return_type { function_body }

Example

#include <string>
#include <cctype>
#include <algorithm>
#include <iostream>
 
int main()
{
    std::string s("hello");
    std::transform(s.begin(), s.end(), s.begin(),
                   [](unsigned char c) { return std::toupper(c); });
    std::cout << s;
}

Reference

Anonymous function