Let’s slightly modify the example from The Move Iterator Adapter in C++ post:
#include
#include
#include
#include
/// @warning BUG! PLEASE, DON'T USE!
auto deep_copy_to_list(const std::vector& src)
{
std::list dst; // constructs the empty list
copy(cbegin(src), cend(src), begin(dst)); // cause memory corruption (if !src.empty())!
return dst;
}
In the example above the object of…
The dereference prefix operator * being applied to iterator returns the lvalue reference to the element pointed by the iterator. Therefore, algorithms such as std::copy or std::transform calls copying constructors of processed elements, for example:
#include
#include…
Iterator abstracts the concept of pointer to the sequence in range [begin, end), and thus provides the following basic operations:
dereference to obtain the current element;movement to point the next element;comparison to determine at least the end of…
There are a lot ways to operate on files in C and C++. In C programming is enough to use FILE, fopen(), fclose() operations. In C++ FileOpen().was enough to operate before. In Modern C++ because of multiplatform operating systems, global languages and for the other benefits of usage File Streams are better to operate better and more friendly. There is a good information about Using File Streams…
In order to compile C++ templates the compilers like Embarcadero RAD Studio C++ compilers are required to perform two stages: definition stage and instantiation stage.
The template definition stage
On this stage the following checks are performed:
static assertions…
This video gives you a quick introduction to the RAD Studio and C++Builder IDE for quickly building beautiful Windows apps with C++. Eli M. walks you through how to set up both VCL and FireMonkey projects while going through some of the key IDE features. C++Builder is a…
There are two kinds of if statements in modern C++: runtime if and compile-time if constexpr.
Runtime if looks like:
if (condition) statement-true
if (condition) statement-true else statement-false
In both forms of above if the result of condition yields to true, then statement-true is executed. Otherwise (in the second form of above) the statement-false is…
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