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How much is too much with C++11 auto keyword?
I've been using the new auto keyword available in the C++11 standard for complicated templated types which is what I believe it was designed for. But I'm also using it for things like:
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Why does the C preprocessor interpret the word “linux” as the constant “1”?
...hout -x as it doesn't have an extension, so gcc doesn't know if it is C or C++. You can use gcc -E -dM -x c /dev/null or gcc -E -dm -x c++ /dev/null to get the list without having to create an empty file.
– Chris Dodd
Oct 6 '13 at 19:39
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What is the difference between 'typedef' and 'using' in C++11?
I know that in C++11 we can now use using to write type alias, like typedef s:
7 Answers
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What differences, if any, between C++03 and C++11 can be detected at run-time?
...h, when compiled with a C compiler will return 0, and when compiled with a C++ compiler, will return 1 (the trivial sulution with
#ifdef __cplusplus is not interesting).
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Is std::vector so much slower than plain arrays?
...ector. So much for the compiler being smart enough to optimize out all the C++ness and make STL containers as fast as raw arrays.
The bottom line is that the compiler is unable to optimize away the no-op default constructor calls when using std::vector. If you use plain new[] it optimizes them away...
What should go into an .h file?
...PL. #2 would be possible if export was supported and may be possible using c++0x and extern templates. IMO, header files in c++ lose much of their usefulness.
– KitsuneYMG
Dec 22 '09 at 12:39
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What is the difference between “Include Directories” and “Additional Include Directories”
In configuration properties of my project, under the "VC++ directories" there is an entry for "Include Directories". But under "C/C++" option, there is another entry called "Additional Include Directories". Same thing happens with library directories.
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Why does string::compare return an int?
...ntegral
promotion, so there's no point in returning anything smaller.
In C++ (as in C), every expression is either an rvalue or an
lvalue. Historically, the terms refer to the fact that lvalues
appear on the left of an assignment, where as rvalues can only
appear on the right. Today, a simple ap...
Why is the asterisk before the variable name, rather than after the type?
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float an_element = my_array[2];
and: int copy_of_value = *myVariable;.
C++ throws a spanner in the works with references, because the syntax at the point where you use references is identical to that of value types, so you could argue that C++ takes a different approach to C. On the other hand, ...
error: use of deleted function
I've been working on some C++ code that a friend has written and I get the following error that I have never seen before when compiling with gcc4.6:
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