Function Objects and Lambda Expressions
Understand the power of lambda expressions and function objects in C++. Learn how lambdas simplify passing functions, use capture clauses for stateful behavior, and how they relate to callable classes. This lesson equips you to enhance code flexibility and efficiency.
Lambda expressions: versatility and functionality
Lambda expressions, introduced in C++11, and further enhanced with every C++ version since, are one of the most useful features in modern C++. Their versatility comes not only from easily passing functions to algorithms but also their use in a lot of circumstances where we need to pass the code around, especially as we can store a lambda in a std::function.
Although lambdas made these programming techniques vastly simpler to work with, everything mentioned in this section is possible to perform without them.
A lambda—or, more formally, a lambda expression—is a convenient way of constructing a function object. But instead of using lambda expressions, we could instead implement classes with operator() overloaded, ...