Lambda Functions in C++ 11

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From: http://en.cppreference.com/w/cpp/language/lambda

Syntax:

[capture-list](params) mutable(optional) exception attribute -> ret { body }
[capture-list](params) -> ret { body }
[capture-list](params) { body }
[capture-list] { body }

Explanation:

  • mutable: allows body to modify the parameters captured by copy, and to call their non-const member functions
  • exception: provides the exception specification or the noexcept clause for operator() of the closure type
  • attribute: provides the attribute specification for operator() of the closure type
  • capture-list: a comma-separated list of zero or more captures, optionally beginning with a capture-default. Capture list can be passes as follows:
    • [a,&b] where a is captured by value and b is captured by reference
    • [this] captures the this pointer by value
    • [&] captures all automatic variables odr-used in the body of the lambda by reference
    • [=] captures all automatic variables odr-used in the body of the lambda by value
    • [] captures nothing
  • params: The list of parameters
  • ret: Return type. If not present it’s implied by the function return statements (or void if it doesn’t return any value)
  • body: Function body