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do {…} while(false)
...o out of a block most definitely causes local variables to be destroyed in C++, same as break. And in C variables aren't really destroyed, their stack space is simply reclaimed.
– Ben Voigt
Feb 23 '10 at 16:00
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Overloading member access operators ->, .*
...ry dereferencing operator * (i.e. the first part of what -> does).
The C++ -> operator is basically the union of two steps and this is clear if you think that x->y is equivalent to (*x).y. C++ allows you to customize what to do with the (*x) part when x is an instance of your class.
The s...
C libcurl get output into a string
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for C++ std::string go here
– Trevor Boyd Smith
Sep 4 '18 at 14:40
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How do you set, clear, and toggle a single bit?
...it to either 1 or 0 can be achieved with the following on a 2's complement C++ implementation:
number ^= (-x ^ number) & (1UL << n);
Bit n will be set if x is 1, and cleared if x is 0. If x has some other value, you get garbage. x = !!x will booleanize it to 0 or 1.
To make this indepen...
What is “missing” in the Visual Studio 2008 Express Editions?
...ling or test framework support
No MFC/ATL support
No support for compiling C++ to 64-bit images (workaround is to install Windows SDK which is free)
NOTE: it is often said that the Express EULA does not permit commercial development - that is not true (Visual Studio Express FAQ Item 7)
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How to suppress GCC warnings from library headers?
...ou're trying to do this in XCode then stick -isystem path into your "other C++ flags" in the "custom compiler flags" in your target build settings.
– Matt Parkins
Dec 11 '13 at 12:08
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Why .NET String is immutable? [duplicate]
...te, a new copy of the state class is created. This is more often used with C++ than C#, which is why it's std:string enjoys some, but not all, of the advantages of immutable types, while remaining mutable.
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How to overload the operator++ in two different ways for postfix a++ and prefix ++a?
...ally take an int parameter. Its a fake parameter. But the designers of the C++ language had to define a way to distinguish between prefix and postfix function definitions. This is the design decision they made.
– Martin York
Sep 9 '17 at 5:41
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How expensive is RTTI?
...o free.
Gritty details:
GCC prefers to use a particular "vendor-neutral" C++ ABI[1], and always uses this ABI for Linux and BSD targets[2]. For platforms that support this ABI and also weak linkage, typeid() returns a consistent and unique object for each type, even across dynamic linking boundari...
How to turn on (literally) ALL of GCC's warnings?
...o though, for instance some language-specific options are on the pages for C++ options or Obj-C options. To find them all you're better off looking at the Options Summary
Turning on everything would include -Wdouble-promotion which is only relevant on CPUs with a 32-bit single-precision floating-po...