By Scott Meyers

Coming to grips with C++11 and C++14 is greater than a question of familiarizing your self with the beneficial properties they introduce (e.g., car kind declarations, circulation semantics, lambda expressions, and concurrency support). The problem is studying to take advantage of these beneficial properties effectively—so that your software program is right, effective, maintainable, and transportable. That’s the place this sensible ebook is available in. It describes tips on how to write really nice software program utilizing C++11 and C++14—i.e. utilizing sleek C++.

Topics include:

-The professionals and cons of braced initialization, noexcept standards, excellent forwarding, and clever pointer make functions
-The relationships between std::move, std::forward, rvalue references, and common references
-Techniques for writing transparent, right, potent lambda expressions
-How std::atomic differs from risky, how each one can be used, and the way they relate to C++'s concurrency API
-How most sensible practices in "old" C++ programming (i.e., C++98) require revision for software program improvement in sleek C++

Effective smooth C++ follows the confirmed guideline-based, example-driven layout of Scott Meyers' prior books, yet covers completely new fabric.

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Extra info for Effective Modern C++: 42 Specific Ways to Improve Your Use of C++11 and C++14

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B. float) sind. Der Compiler entscheidet anband des Typs der Operanden, ob die Additionsroutine für Ganzzahlen oder für Gleitkommazahlen aufgerufen werden muß. In C+ + ist diese bisher nur dem Compiler vorbehaltene Unterscheidungsmöglichkeit auch dem Programmierer zugänglich. In C+ + kann nämlich (fast) jeder Operator für benutzerdefinierte Datentypen neu implementiert werden. B. der Operator "+" für komplexe Zahlen, für Vektoren und Matrizen oder für Zeichenketten jeweils anders implementiert werden.

0 }; Das Feld definiert 5 Elemente, es sind jedoch nur 4 Werte in der Initialisiererliste vorhanden. Für das fünfte Element wäre ein Standard-Konstruktor erforderlich. Folgendes Listing zeigt die Erweiterung von complexr um einen StandardKonstruktor. 0; } // Standardkonstruktor ComplexT( float re in ) { re = re_in; im = 0. B. 0, 3. 0, 4. 0) initialisiert wird. 4 C + + Teil 1 (Klassen) 44 Ein Manko bei dieser Art der Initialisierung von Feldelementen ist, daß immer das Gleichheitszeichen verwendet werden muß und daß nur ein Konstruktor mit einem Argument aufgerufen werden kann.

Dies ist bei automatischen Variablen dann der Fall, wenn der Gültigkeitsbereich verlassen wird, also im allgemeinen bei der schließenden Klammer des Blocks, in der das Objekt definiert wurde. Dies wird normalerweise das Ende einer Funktion (hierzu gehört auch main) sein. void Irgendeinefunktion( float re_in, float im_in ) { } ComplexT c1 ( re_in, im_in >; II hier folgen die Verarbeitungsschritte der Funktion Für globale Variable wird der Destruktor normalerweise bei Beendigung des Programms aufgerufen.

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