Notes on C++14
- What is a standard?
- TS: "A normative document representing the technical consensus within an ISO committee". TS is a preview of a standard. ISO requires that every TS either becomes standard or is withdrawn in 6 years.
- TR: "An informative document containing information of a different kind from that normally published in a normative document."
- C++ Standards Timeline [source: WWW]
- Evolution of C++ [source: WWW]
- C++ as in 2015 [source: WWW]
1 C++1x Features
- Generic lambdas:
auto lambda = [](auto x, auto y) {return x + y;}; - Constant Expressions: A
constexpris computed at compile time. - Type Deduction of Return Value:
auto DeducedReturnTypeFunction(); - https://gcc.gnu.org/projects/cxx-status.html#cxx14 g++ support
- RAII (Resource Acquisition Is Initialization) "In RAII, holding a resource is a class invariant, and is tied to object lifetime". Resource acquisition is done by the constructor. Resource release is done by the destructor. Scope Bound Resource Management (SBRM) is a better name for RAII?
- C++1x move semantics
- https://en.wikipedia.org/wiki/C++17
1.1 Pointers
newanddeleteare (almost) unnecessary.- Allocator The standard library provides several containers. They grow/ shrink.
- Different types of smart pointers:
shared_ptr<T>,unique_ptr,scoped_ptr,make_shared,make_unique
2 Exercise
- As a learning experience, fix this worms example code so that it is C++14 compliant.
3 References
- http://www.stroustrup.com/ Home page of the creator of C++. Has many links. Highly recommended visits.
- https://www.quora.com/Why-do-people-say-that-C++-has-a-lot-of-obscure-features ?
- http://www.drdobbs.com/cpp/the-c14-standard-what-you-need-to-know/240169034
- SEI CERT Coding Standards, 2015:
- C https://www.securecoding.cert.org/confluence/display/c/SEI+CERT+C+Coding+Standard;
- C++ https://www.securecoding.cert.org/confluence/pages/viewpage.action?pageId=637
- Book by Robert Seacord, Secure Coding in C and C++, 2nd Edition.
- C++14 Standard.
- The link http://open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3797.pdf is to a cost-free download of a draft dated 2013.
- The official 2014 pdf is paywalled
- The working draft of the next version Pages = 1370+ http://open-std.org/JTC1/SC22/WG21/docs/papers/2015/n4567.pdf