C++ lambda

a throwaway function

Lambda data type

[capture list](parameter list) -> return type { body };

capture list

• which outside variables are available in the body
• if they should be captured by value or reference
• C++11 has a capture list by value or by reference
• C++14 added capture by move
• C++17 added the ability to capture *this by value
• scoping, watch dangling references
• if you are using capture by value, it is captured by const value
• to allow the captured value to be changed, add mutable before body

Capture example 1

Capture example 2