2023年9月22日 · It is important to know that std::function and lambdas are different, if compatible, beasts. The next part of the line is a lambda. This is new syntax in C++11 to add the ability to write simple function-like objects -- objects that can be invoked with ().

2019年3月19日 · Most Vexing Parse is IMO one of the worst parts of C++. Also IMO, it is a consequence of another one of the worst parts of C++: function declaration syntax -- which is a consequence, IMO, of adherence, of the * in declarations, to names, …

@Shadi, C++14 includes N3638, which allows deduction of the return type declared as auto, without the -> notation, as long as the function is fully defined before use and all return statements deduce to the same type. The -> notation is still useful if you want to use deduction for public function while hiding the body in the source file. –

The standard defines two terms: declaration and definition. A definition is a tentative declaration. However, the C99 and C++03 standards have slightly varying definitions. From C++0x draft: Appendix C. 8.3.5 Change: In C++, a function declared with an empty parameter list takes no arguments. In C, an empty parameter list means that the number ...

2012年1月7日 · In C++ passing the array by reference without losing the dimension information is probably the safest, since one needn't worry about the caller passing an incorrect dimension (compiler flags when mismatching).

2010年12月8日 · __PRETTY_FUNCTION__ is a gcc extension that is mostly the same as __FUNCTION__, except that for C++ functions it contains the "pretty" name of the function including the signature of the function. Visual C++ has …

In the function f I declare x and y as pointers of which I can get the value by using *x. When calling f I need to pass the address of my passed arguments, that is why I pass &a, &b . f2 is the same except the definition is different.

2014年6月7日 · (b) Using a function template instead (as per Josh Kelley's answer) does allow you to infer the size of an array passed to a function. – j_random_hacker Commented Jan 15, 2009 at 12:53

2009年11月1日 · A C++17 solution: full type safety + nice calling syntax. Since the introduction of variadic templates in C++11 and fold expressions in C++17, it is possible to define a template-function which, at the caller site, is callable as if it was a varidic function but with the advantages to: be strongly type safe;

2013年7月28日 · C++ splits the load of generating machine executable code in following different phases - Preprocessing - This is where any macros - #define s etc you might be using get expanded. Compiling - Each cpp file along with all the #include d files in that file directly or indirectly (together called a compilation unit) is converted into machine ...