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These named modules were added to include all items declared in both global and std namespaces provided by the importable standard headers. Macros are not allowed to be exportable, so users have to manually include or import headers that emit macros for use. The C++ standard has reserved std and std.* as module names. [11]
In the C++ Standard Library, several algorithms use unqualified calls to swap from within the std namespace. As a result, the generic std::swap function is used if nothing else is found, but if these algorithms are used with a third-party class, Foo, found in another namespace that also contains swap(Foo&, Foo&), that overload of swap will be used.
For example, the entire C++ Standard Library is defined within namespace std, but before standardization many components were originally in the global namespace. A programmer can insert the using directive to bypass namespace resolution requirements and obtain backwards compatibility with older code that expects all identifiers to be in the ...
Access to C library functions via namespace ::std and the C++≥98 header names is preferred where possible. To encourage adoption, C++98 obsoletes the C ( *.h ) header names, so it’s possible that use of C compatibility headers will cause an especially strict C++98– 20 preprocessor to raise a diagnostic of some sort.
Most of Library Fundamentals TS I, including: [29] [30] std::string_view, a read-only non-owning reference to a character sequence or string-slice [31]; std::optional, for representing optional objects, a data type that may not always be returned by a given algorithm with support for non-return
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The ranges versions of algorithm functions are scoped within the ranges namespace. They extend the functionality of the basic algorithms by allowing iterator-sentinel pairs to be used instead of requiring that both iterators be of the same type and also allowing interoperability with the objects provided by the ranges header without requiring ...
DETROIT (Reuters) -U.S. automakers Ford Motor and General Motors will donate $1 million each, along with vehicles, to U.S. President-elect Donald Trump's January inauguration, company ...