Why does C++11’s lambda require “mutable” keyword for capture-by-value, by default?

by

It requires mutable because by default, a function object should produce the same result every time it’s called. This is the difference between an object orientated function and a function using a global variable, effectively.

More Related Contents:

  1. Declaring lambda with int type not working [closed]
  2. What is a lambda expression in C++11?
  3. Is it possible to figure out the parameter type and return type of a lambda?
  4. Recursive lambda functions in C++11
  5. Passing capturing lambda as function pointer
  6. What is the type of lambda when deduced with “auto” in C++11?
  7. How to convert a lambda to an std::function using templates
  8. How is std::function implemented?
  9. Bind Vs Lambda?
  10. C++0x lambda capture by value always const?
  11. C++11 lambda implementation and memory model
  12. Can lambda functions be templated?
  13. Error: variable “cannot be implicitly captured because no default capture mode has been specified”
  14. Lambda capture as const reference?
  15. Why can’t I create a vector of lambdas (of the same type) in C++11?
  16. Lifetime of lambda objects in relation to function pointer conversion
  17. Why can’t I capture this by-reference (‘&this’) in lambda?
  18. How to immediately invoke a C++ lambda?
  19. std::remove_if – lambda, not removing anything from the collection
  20. Lambda functions as base classes
  21. How do static variables in lambda function objects work?
  22. Lambdas and capture by reference local variables : Accessing after the scope
  23. What is the purpose of std::function and how to use it?
  24. Can we get the type of a lambda argument?
  25. In lambda functions syntax, what purpose does a ‘capture list’ serve?
  26. Lambdas and std::function
  27. Explicit Return Type of Lambda
  28. Using data member in lambda capture list inside a member function
  29. C++ priority_queue with lambda comparator error
  30. Overload resolution with std::function

Leave a Comment