Answer by Saurav Sahu for When should I really use noexcept?
In Bjarne's words (The C++ Programming Language, 4th Edition, page 366): Where termination is an acceptable response, an uncaught exception will achieve that because it turns into a call of terminate()...
View ArticleAnswer by Philipp Claßen for When should I really use noexcept?
There are many examples of functions that I know will never throw, but for which the compiler cannot determine so on its own. Should I append noexcept to the function declaration in all such cases?...
View ArticleAnswer by Andrzej for When should I really use noexcept?
noexcept can dramatically improve performance of some operations. This does not happen at the level of generating machine code by the compiler, but by selecting the most effective algorithm: as others...
View ArticleAnswer by Raedwald for When should I really use noexcept?
There are many examples of functions that I know will never throw, but for which the compiler cannot determine so on its own. Should I append noexcept to the function declaration in all such cases?...
View ArticleAnswer by Terry Mahaffey for When should I really use noexcept?
This actually does make a (potentially) huge difference to the optimizer in the compiler. Compilers have actually had this feature for years via the empty throw() statement after a function definition,...
View ArticleAnswer by Matthieu M. for When should I really use noexcept?
As I keep repeating these days: semantics first. Adding noexcept, noexcept(true) and noexcept(false) is first and foremost about semantics. It only incidentally condition a number of possible...
View ArticleAnswer by Pubby for When should I really use noexcept?
I think it is too early to give a "best practices" answer for this as there hasn't been enough time to use it in practice. If this was asked about throw specifiers right after they came out then the...
View ArticleAnswer by Nicol Bolas for When should I really use noexcept?
When can I realistically except to observe a performance improvement after using noexcept? In particular, give an example of code for which a C++ compiler is able to generate better machine code after...
View ArticleWhen should I really use noexcept?
The noexcept keyword can be appropriately applied to many function signatures, but I am unsure as to when I should consider using it in practice. Based on what I have read so far, the last-minute...
View ArticleAnswer by drbombe for When should I really use noexcept?
Here is a simple example to illustrate when it could really matter.#include <iostream>#include <vector>using namespace std;class A{ public: A(int){cout << "A(int)" << endl;}...
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