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c++ Programming Glossary: reallocationWhy does reallocating a vector copy instead of moving the elements? [duplicate] http://stackoverflow.com/questions/10127603/why-does-reallocating-a-vector-copy-instead-of-moving-the-elements grows insert push_back and emplace _back can cause a reallocation of a std vector . I was baffled to see that the following code.. but how Also note that I made sure that this is caused by reallocation by experimentally putting a foos.reserve 2 in front of the insertions.. if it'll exercise that option. If T is not CopyInsertable reallocation will use move construction but exception safety depends on whether..
How to insert a duplicate element into a vector? http://stackoverflow.com/questions/10218223/how-to-insert-a-duplicate-element-into-a-vector this problem. One is to use reserve to make sure that no reallocation takes place test.reserve test.size 1 test.insert test.begin..
Why does std::stack use std::deque by default? http://stackoverflow.com/questions/102459/why-does-stdstack-use-stddeque-by-default container for it a deque instead of a vector Don't deque reallocations give a buffer of elements before front so that push_front is.. This makes growing faster than a vector which requires reallocation and copying so for something like a stack which is all about.. share improve this question As the container grows a reallocation for a vector requires copying all the elements into the new..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring front rather than relying on the string class's automatic reallocation #include string #include fstream #include streambuf std ifstream..
Why is there no reallocation functionality in C++ allocators? http://stackoverflow.com/questions/3105001/why-is-there-no-reallocation-functionality-in-c-allocators is there no reallocation functionality in C allocators In C the standard memory handling.. C stdlib allocators only parallel two of them there is no reallocation function. Of course it would not be possible to do exactly the.. That's all we need to do else ... Do the standard reallocation by using a different buffer copying data and freeing the current..
how can I use valgrind with python c++ extensions? http://stackoverflow.com/questions/3982036/how-can-i-use-valgrind-with-python-c-extensions false positives due to Python's custom memory allocation reallocation functions. The valgrind suppression file can be found here http..
Rules for Iterator Invalidation http://stackoverflow.com/questions/4114503/rules-for-iterator-invalidation is inserted depends in where the object is inserted and if reallocation takes place and they get invalidated when an object is removed..
http://stackoverflow.com/questions/4340396/does-the-c-standard-mandate-poor-performance-for-iostreams-or-am-i-just-deali for all methods. This means that ostringstream and vector reallocation which takes place only on the first pass should have little..
http://stackoverflow.com/questions/4346742/stl-vector-and-thread-safety notably insertions and erasures change its state even if a reallocation is not required any insertion or erasure requires std vector..
http://stackoverflow.com/questions/4705593/int-vs-const-int a const reference but doing the push_back may require a reallocation and if that happens means that after the reallocation the reference.. a reallocation and if that happens means that after the reallocation the reference received would not be valid any more lifetime..
What really is a deque in STL? http://stackoverflow.com/questions/6292332/what-really-is-a-deque-in-stl add elements in constant time It should be mentioned that reallocation may happen and that O 1 is an amortized cost like for a vector..
Choice between vector::resize() and vector::reserve() http://stackoverflow.com/questions/7397768/choice-between-vectorresize-and-vectorreserve is added to the vector. If you then insert the elements no reallocation will happen because it was done in advance but that's the only..
What is the lifetime and validity of C++ iterators? http://stackoverflow.com/questions/759274/what-is-the-lifetime-and-validity-of-c-iterators and deque Vector inserting All iterators get invalid if reallocation happens otherwise its valid. erasing All iterators after erase..
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