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50 lines
1.5 KiB
ReStructuredText
50 lines
1.5 KiB
ReStructuredText
.. _libcudacxx-standard-api-concepts:
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Concepts Library
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=======================
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.. list-table::
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:widths: 25 45 30
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:header-rows: 1
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* - Header
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- Content
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- Availability
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* - `\<cuda/std/concepts\> <https://en.cppreference.com/w/cpp/header/concepts>`_
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- Fundamental library concepts
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- CCCL 2.1.0 / CUDA 12.2
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Extensions
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----------
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- All library features are available from C++14 onwards. The concepts
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can be used like type traits prior to C++20.
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.. code:: cpp
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template<cuda::std::integral Integer>
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void do_something_with_integers_in_cpp20(Integer&& i) {...}
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template<class Integer, cuda::std::enable_if_t<cuda::std::integral<Integer>, int> = 0>
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void do_something_with_integers_in_cpp17(Integer&& i) {...}
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template<class Integer, cuda::std::enable_if_t<cuda::std::integral<Integer>, int> = 0>
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void do_something_with_integers_in_cpp14(Integer&& i) {...}
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Restrictions
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------------
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- Subsumption does not work prior to C++20
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.. code:: cpp
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template<class Integer, cuda::std::enable_if_t<subsuming_concept<Integer> && true, int> = 0>
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void would_be_preferred_overload_in_cpp20(Integer&& i) {...}
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template<class Integer, cuda::std::enable_if_t<cuda::std::integral<Integer>, int> = 0>
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void is_always_ambiguous_in_cpp17(Integer&& i) {...}
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- Subsumption is only partially implemented in the compiler until nvcc 12.4
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nvcc has issues detecting subsumption of concepts that are composed of multiple concepts
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