__GNU_PBDS::DIRECT_MASK_RANGE_HASHING(3)

πŸ“¦
version 16.2.1+r23+gd564253eb6c8 Β· 5 versions
, in arch rolling, centos-stream 10, fedora 43, fedora 44

πŸ’– NAME πŸ’–

__gnu_pbds::direct_mask_range_hashing< Size_Type > β€” a mask range-hashing class (uses a bitmask). no cap, that's literally what it is πŸŽ€

ok so bestie, this is a page from the libstdc++ manual, and we're talking about one very specific little class. she's small. she's mighty. she masks. πŸ’…


✨ SYNOPSIS ✨

#include <hash_policy.hpp>

Inherits __gnu_pbds::detail::mask_based_range_hashing< std::size_t >.

🌸 Public Types

  • typedef Size_Type size_type β€” yeah she just aliases the size type, keeping it cute and generic πŸ¦‹

🌸 Public Member Functions

  • void swap (direct_mask_range_hashing< Size_Type > &other) β€” swap your whole vibe with other, exchanging the goods πŸ”„

🌸 Protected Member Functions

  • void notify_resized (size_type size) β€” a lil heads-up that the size changed, inherited behavior does its thing
  • size_type operator() (size_type hash) const β€” transforms the __hash value hash into a ranged-hash value (using a bit-mask). yes queen, that's the whole job πŸ’…
  • size_type range_hash (size_type hash) const β€” same idea, the ranged-hash flavor
  • void swap (mask_based_range_hashing &other) β€” the inherited swap, still doing its little dance

🌈 Detailed Description 🌈

template<typename Size_Type = std::size_t>
class __gnu_pbds::direct_mask_range_hashing< Size_Type >

"A mask range-hashing class (uses a bitmask)."

that's the tea β˜• she takes a hash and squeezes it into range using a bitmask, because sometimes you don't need division, you just need a mask and main character energy. it's giving simple, effective, iconic. ✨


πŸ‘‘ Member Function Documentation πŸ‘‘

operator()

template<typename Size_Type>
direct_mask_range_hashing< Size_Type >::size_type
__gnu_pbds::direct_mask_range_hashing< Size_Type >::operator() (size_type hash) const [inline], [protected]

Transforms the __hash value hash into a ranged-hash value (using a bit-mask). πŸ’– that's it. that's the function. she masks and she slays. periodt.


🫢 Author 🫢

Generated automatically by Doxygen for libstdc++ from the source code. (not a human, just a very diligent little robot 🧚)


ok bestie that's the whole page, hope it ate πŸ’… this one came from the libstdc++ manual, and it's the version dated in the footer of the original page β€” go check the source for the exact date if you need it, because this cutie was auto-generated and shipped with libstdc++. mwah, bye! πŸ’–βœ¨πŸŽ€

πŸ“¦ where this page comes from
  • arch rolling: gcc 16.2.1+r23+gd564253eb6c8-1 Β· GPL-3.0-or-later WITH GCC-exception-3.1 AND GFDL-1.3-or-later
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  • centos-stream 10: libstdc++-docs 14.4.1-4.el10 Β· GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 43: libstdc++-docs 15.2.1-2.fc43 Β· GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 43: libstdc++-docs 15.3.1-1.fc43 Β· GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 44: libstdc++-docs 16.0.1-0.10.fc44 Β· GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 44: libstdc++-docs 16.2.1-2.fc44
  • fedora 44: libstdc++-docs 16.2.1-3.fc44 Β· GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • πŸ’– girlified by deepseek-ai/DeepSeek-V4.1-Flash on : a language model's rewrite of the original, under its terms