c++ - What is the copy-and-swap idiom? - Stack Overflow
The copy-and-swap idiom is only intended to simplify the creation of new resource managing classes in a general way. For every particular class, there is almost certainly a more efficient route. This idiom is just something that works and is hard to do wrong. – GManNickG.
c++ - Why should the "PIMPL" idiom be used? - Stack Overflow
The PIMPL Idiom (Pointer to IMPLementation) is a technique for implementation hiding in which a public class wraps a structure or class that cannot be seen outside the library the public class is part of. This hides internal implementation details and data from the user of the library. When implementing this idiom why would you place the public ...
c++ - Copy & Move Idiom? - Stack Overflow
Apr 12, 2017 · By using the Copy & Swap idiom we can easily implement copy assignment with strong exception safety: T& operator = (T other){. using std::swap; swap(*this, other); return *this; } However this requires T to be Swappable. Which a type automatically is if std::is_move_constructible_v<T> && std::is_move_assignable_v<T> == true thanks to …
Basic C++ Idioms / Techniques - Stack Overflow
Nov 6, 2015 · Because leveldb is a product level code. So you can learn the cpp idiom and design pattern from a real product. Let me show you some example. Leveldb use the Pimpl idiom, almost in all of it's head file, such table.h table_build.h write_batch.h. You can learn from the code directly. Leveldb use many OO design pattern, such as build pattern, the ...
Detect current device with UI_USER_INTERFACE_IDIOM() in Swift
Also, note that even when working with Objective-C, the UI_USER_INTERFACE_IDIOM() macro is only required when targeting iOS 3.2 and below. When deploying to iOS 3.2 and up, you can use [UIDevice userInterfaceIdiom] directly. Never mind. I got it working with if UIDevice.currentDevice().userInterfaceIdiom == .Pad.
terminology - Difference between Idiom and Design Pattern?
An idiom of a language is something you expect a random, proficient user of the language to recognize; reimplementing a first-class feature will look alien and out-of-place. There's no C++ idiom for single dispatch, one just uses virtual in some places whereas hand-written pointer to members table trickery will look just silly.
language agnostic - What is a programming idiom? - Stack Overflow
An idiom is a 'pattern' that can be identified in several places. I wouldn't say it has anything to do with a particular programming language. Iterator foo; foo.reset(); while (foo.next()) { print(foo.value()); } That is a snippet of what i would call the 'for each' idiom which is expressed slightly different in a number of languages.
Is the PIMPL idiom really used in practice? - Stack Overflow
Jan 23, 2012 · 3. @AaronMcDaid The pimpl idiom avoids virtual function calls. It's also a bit more C++-ish (for some conception of C++-ish); you invoke constructors, rather than factory functions. I've used both, depending on what is in the existing code base---the pimpl idiom (originally called the Cheshire cat idiom, and predating Herb's description of it ...
Is this key-oriented access-protection pattern a known idiom?
Dec 18, 2014 · Matthieu M. brought up a pattern for access-protection in this answer that i'd seen before, but never conciously considered a pattern: friend class Foo; SomeKey() {} // possibly make it non-copyable too. void protectedMethod(SomeKey); Here only a friend of the key class has access to protectedMethod():
Go examples and idioms - Stack Overflow
This is a true idiom that is quite important: how to feed data into a channel and close it afterwards. With this you can make simple iterators (since range will accept a channel) or filters.