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What exactly is metaprogramming?
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Don't forget about template metaprogramming in C++. The ability to execute expressions and make decisions at compile-time, and have the results be compiled statically into the final executable.
– Remy Lebeau
May 23 '14 at 3:07
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Beyond Stack Sampling: C++ Profilers
...se the int main() dominates the graph.
If you're doing anything crazy with C++ templates you'll probably want to add --strip. This is especially true with Boost.
I use OProfile to generate my sampling data. To get good output I need configure it to load the debug symbols from my 3rd party and syst...
Placement of the asterisk in pointer declarations
I've recently decided that I just have to finally learn C/C++, and there is one thing I do not really understand about pointers or more precisely, their definition.
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C++ map access discards qualifiers (const)
...an std::pair containing both the key (.first) and the value (.second).
In C++11, you could also use at() for std::map. If element doesn't exist the function throws a std::out_of_range exception, in contrast to operator [].
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NULL vs nullptr (Why was it replaced?) [duplicate]
I know that in C++ 0x or NULL was replaced by nullptr in pointer-based applications. I'm just curious of the exact reason why they made this replacement?
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bool to int conversion
...Standard conformant. bool to int conversion is implicit!
§4.7/4 from the C++ Standard says (Integral Conversion)
If the source type is bool, the value false is converted to zero and
the value true is converted to one.
As for C, as far as I know there is no bool in C. (before 1999) So boo...
Why does the C++ map type argument require an empty constructor when using []?
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Excellent answer -- note also emplace in C++11 as a terse alternative to insert.
– prideout
Nov 18 '14 at 19:32
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Why the switch statement cannot be applied on strings?
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The reason why has to do with the type system. C/C++ doesn't really support strings as a type. It does support the idea of a constant char array but it doesn't really fully understand the notion of a string.
In order to generate the code for a switch statement the compi...
What are the GCC default include directories?
...he output of the following commands:
For C:
gcc -xc -E -v -
For C++:
gcc -xc++ -E -v -
The credit goes to Qt Creator team.
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What is the performance cost of having a virtual method in a C++ class?
Having at least one virtual method in a C++ class (or any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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