mirror of git://gcc.gnu.org/git/gcc.git
106 lines
4.5 KiB
C++
106 lines
4.5 KiB
C++
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/*
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This just provides documentation for stuff that doesn't need to be in the
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source headers themselves. It is a ".cc" file for the sole cheesy reason
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that it triggers many different text editors into doing Nice Things when
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typing comments. However, it is mentioned nowhere except the *cfg.in files.
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Pieces separated by '// //' lines will usually not be presented to the
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user on the same page.
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*/
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// // // // // // // // // // // // // // // // // // // // // // // //
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/** @namespace std
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* @brief Everything defined by the ISO C++ Standard is within namespace std.
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*/
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/** @namespace __gnu_cxx
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* @brief This namespace serves two purposes.
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*
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* This namespace is used for two things:
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* - sequestering internal (implementation-only) names away from the
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* global namespace; these are details of the implementation and should
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* not be touched by users
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* - GNU extensions for public use
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*
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* This is still fluid and changing rapidly. Currently the rule is: if an
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* entitity is found in the user-level documentation, it falls into the
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* second category.
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*/
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// // // // // // // // // // // // // // // // // // // // // // // //
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/** @addtogroup SGIextensions STL extensions from SGI
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Because libstdc++-v3 based its implementation of the STL subsections of
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the library on the SGI 3.3 implementation, we inherited their extensions
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as well.
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They are additionally documented in the
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<a href="http://gcc.gnu.org/onlinedocs/libstdc++/documentation.html">
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online documentation</a>, a copy of which is also shipped with the
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library source code (in .../docs/html/documentation.html). You can also
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read the documentation <a href="http://www.sgi.com/tech/stl/">on SGI's
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site</a>, which is still running even though the code is not maintained.
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<strong>NB</strong> that the following notes are pulled from various
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comments all over the place, so they may seem stilted.
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<hr>
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*/
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// // // // // // // // // // // // // // // // // // // // // // // //
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// This is standalone because, unlike the functor introduction, there is no
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// single header file which serves as a base "all containers must include
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// this header". We do some quoting of 14882 here.
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/** @addtogroup Containers Containers
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Containers are collections of objects.
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A container may hold any type which meets certain requirements, but the type
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of contained object is chosen at compile time, and all objects in a given
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container must be of the same type. (Polymorphism is possible by declaring a
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container of pointers to a base class and then populating it with pointers to
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instances of derived classes. Variant value types such as the @c any class
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from <a href="http://www.boost.org/">Boost</a> can also be used.
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All contained types must be @c Assignable and @c CopyConstructible.
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Specific containers may place additional requirements on the types of
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their contained objects.
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Containers manage memory allocation and deallocation themselves when
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storing your objects. The objects are destroyed when the container is
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itself destroyed. Note that if you are storing pointers in a container,
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@c delete is @e not automatically called on the pointers before destroying them.
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All containers must meet certain requirements. They would be listed here
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except I'm not certain how much of 14882 can be reproduced without a
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copyright violation. Reproducing Tables 65 through 69 is a lot of typing...
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The standard containers are further refined into
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@link Sequences Sequences@endlink and
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@link Assoc_containers Associative Containers@endlink.
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*/
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/** @addtogroup Sequences Sequences
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Sequences arrange a collection of objects into a strictly linear order.
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The differences between sequences are usually due to one or both of the
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following:
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- memory management
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- algorithmic complexity
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As an example of the first case, @c vector is required to use a contiguous
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memory layout, while other sequences such as @c deque are not.
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The prime reason for choosing one sequence over another should be based on
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the second category of differences, algorithmic complexity. For example, if
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you need to perform many inserts and removals from the middle of a sequence,
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@c list would be ideal. But if you need to perform constant-time access to
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random elements of the sequence, then @c list should not be used.
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*/
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/** @addtogroup Assoc_containers Associative Containers
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Associative containers allow fast retrieval of data based on keys.
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Each container type is parameterized on a @c Key type, and an ordering
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relation used to sort the elements of the container.
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*/
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// // // // // // // // // // // // // // // // // // // // // // // //
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