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wata_d id:wata_d

c++ã«é–¢ã™ã‚‹wata_dã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (242)

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2023å¹´ã«ç‰¹ã«ãŠä¸–è©±ã«ãªã£ãŸC++ãƒ©ã‚¤ãƒ–ãƒ©ãƒª8é¸ - Qiita
ãŸã¶ã‚“2023å¹´ä¸€ç•ªãŠä¸–è©±ã«ãªã£ãŸãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã™ã€‚ 2022å¹´ã¾ã§ã¯simdjsonã‚’ã‚ˆãä½¿ã£ã¦ã„ãŸã®ã§ã™ãŒã€æ–°è¦ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã¯Glazeã°ã‹ã‚Šä½¿ã£ã¦ã„ã¾ã™ã€‚ é–‹ç™ºãŒæ´»ç™ºã ã—ã€ISSUEã¸ã®å¯¾å¿œãŒé€Ÿã„ã®ã‚‚ã‚ã‚ŠãŒãŸã„ã§ã™ã€‚ è‰¯ã„ç‚¹ SIMDã‚’åˆ©ç”¨ã—ã¦ã„ãªã„ã®ã«simdjsonã‚„yyjsonã¨éœè‰²ãªã„é€Ÿåº¦ã§å‹•ä½œã™ã‚‹ æ§‹é€ ä½“ã‚„ã‚¯ãƒ©ã‚¹ã ã‘ã§ãªãSTLã‚³ãƒ³ãƒ†ãƒŠã‚‚JSONã¨ã®ç›´æŽ¥èªã¿æ›¸ããŒã§ãã‚‹ ä¸é–“ãƒ‡ãƒ¼ã‚¿ã«ç‹¬è‡ªãƒã‚¤ãƒŠãƒªå½¢å¼ã‚’åˆ©ç”¨ã—ã¦ã•ã‚‰ã«é«˜é€ŸåŒ–ã§ãã‚‹ ã„ã¾ã„ã¡ãªç‚¹ é•·ã„æ–‡å—åˆ—ãŒå¤šã„JSONãƒ‡ãƒ¼ã‚¿ã®èªã¿è¾¼ã¿ã§ã¯SIMDã‚’ä½¿ã£ã¦ã„ã‚‹ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã«å¯¾ã—ã¦ä¸åˆ©ã«ãªã‚‹ æœ€å¾Œã®ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã®ã‚«ãƒ³ãƒžã‚„ã‚³ãƒ¡ãƒ³ãƒˆã®èªã¿è¾¼ã¿ã«å¯¾å¿œã—ã¦ã„ãªã„ ã‚¹ãƒˆãƒªãƒ¼ãƒ çš„ãªå‡¦ç†ã¯ãªã„(ã¨æ€ã†) ä»£æ›¿ãƒ©ã‚¤ãƒ–ãƒ©ãƒª ä¼¼ãŸã‚ˆã†ãªã‚¢ãƒ—ãƒãƒ¼ãƒã§SIMDã‚’ä½¿ã£ã¦ã•ã‚‰ã«é€Ÿã„Jsonifierã¨ã„ã†ãƒ©ã‚¤ãƒ–ãƒ©ãƒªãŒã‚ã‚Šã¾ã™ã€‚ ç´”ç²‹ãªé€Ÿåº¦ã‚’æ±‚ã‚ã‚‹å ´åˆã«ã¯ã“ã¡ã‚‰ã‚’ä½¿
wata_d 2024/01/02
c++
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GitHub - emil-e/rapidcheck: QuickCheck clone for C++ with the goal of being simple to use with as little boilerplate as possible.
wata_d 2023/11/07
C++
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C++ã®ãƒã‚®ãƒ³ã‚°ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®ãƒ¡ãƒ¢ - toge's diary
æ˜¨å¹´æœ«ã®è©±ã«ãªã‚Šã¾ã™ãŒã€ã¼ãƒ¼ã£ã¨redditã®C++ã‚«ãƒ†ã‚´ãƒªã‚’è¦‹ã¦ã„ãŸã‚‰lwlogã¨ã„ã†ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®è©±é¡ŒãŒå‡ºã¦ã¾ã—ãŸã€‚ ã€Œspdlogã‚ˆã‚Šé€Ÿã„ã€ã£ã¦ã„ã†ã®ãŒå£²ã‚Šã®ã‚ˆã†ã§ã™ã€‚ç¢ºã‹ã«é€Ÿãã†ã€‚ www.reddit.com ã¡ã‚‡ã†ã©è‰¯ã„ã®ã§ãƒã‚®ãƒ³ã‚°ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®å€‹äººçš„ãªãƒ¡ãƒ¢ã‚’ã—ã¦ãŠã“ã†ã¨æ€ã„ã¾ã™ã€‚ boost log www.boost.org C++ã®å®šç•ªãƒ©ã‚¤ãƒ–ãƒ©ãƒªboostã®loggingãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã™ã€‚ æ©Ÿèƒ½è±Šå¯Œã§ã™ãŒã€æ®‹å¿µãªãŒã‚‰å¤§åˆ†é…ã„ã§ã™ã€‚ C++ çš„ã«é…ã„ã®ã¯ã‹ãªã‚Šè‡´å‘½çš„ã ãªãã¨æ€ã†ã®ã§ã‚ã¾ã‚Šç©æ¥µçš„ã«ã¯ä½¿ã„ã¾ã›ã‚“ã€‚ boostä»¥å¤–ä½¿ãˆãªã„å ´åˆã¨ã‹ã‚ã‚‹ã®ã§ãã†ã„ã†æ™‚ã«é‡å®ã—ã¾ã™ã€‚ spdlog github.com å¤šåˆ†boost logã‚’å«ã‚ãŸæ˜”ã‹ã‚‰ã‚ã‚‹loggingãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’é§†é€ã™ã‚‹é«˜é€Ÿå‡¦ç†ã®ãƒã‚®ãƒ³ã‚°ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã—ãŸã€‚ ä»Šã¨ãªã£ã¦ã¯ã‚‚ã£ã¨é€Ÿã„ãƒ©ã‚¤ãƒ–ãƒ©ãƒªãŒå‡ºã¦ãã¦ã—ã¾ã£ãŸã®ã§ã€å‡¦ç†é€Ÿ
wata_d 2021/01/20
c++
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ã‚²ãƒ¼ãƒ é–‹ç™ºè€…ã®ãŸã‚ã® C++11ï½žC++20, å°†æ¥ã® C++ ã®å±•æœ› - CEDEC2020 - Speaker Deck
ã‚²ãƒ¼ãƒ é–‹ç™ºè€…ã®ãŸã‚ã® C++11ï½žC++20, å°†æ¥ã® C++ ã®å±•æœ› ã€CEDEC ãƒšãƒ¼ã‚¸ã€‘https://cedec.cesa.or.jp/2020/session/detail/s5e8327a52702c.html ã€è§£èª¬ä»˜ãã®æ›¸ç±ç‰ˆ ðŸ“šã€‘https://zenn.dev/tetsurom/â€¦
wata_d 2020/09/04
ã™ã”ãä¾¿åˆ©ã«ãªã£ã¦ã‚‹

C++
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std::stringã®SSO(Small-string optimization)ãŒã©ã†ãªã£ã¦ã„ã‚‹ã‹èª¿ã¹ãŸ - Qiita
GCC ã¨ Clang ã® SSO ãŒæ°—ã«ãªã£ãŸã®ã§èª¿ã¹ã¾ã—ãŸã€‚ SSO(Small-string optimization)ã¨ã¯ é€šå¸¸ã€std::string ã¯æ–‡å—åˆ—ã‚’ç¢ºä¿ã™ã‚‹éš›ã€å‹•çš„ã«ãƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã—ã¾ã™ã€‚ ã—ã‹ã— "aaa" ã¨ã‹ "hogehoge" ã¨ã‹ã®å°ã•ã„æ–‡å—åˆ—ã§ãƒ¡ãƒ¢ãƒªã‚’ã‚¢ãƒã‚±ãƒ¼ãƒˆã™ã‚‹ã®ã¯å‹¿ä½“ç„¡ã„ã€‚ ä½•ã¨ã‹ãƒ¡ãƒ¢ãƒªã‚’ç¢ºä¿ã›ãšã«æ¸ˆã¾ã›ã‚ˆã†ã¨é ‘å¼µã£ã¦æœ€é©åŒ–ã•ã‚ŒãŸå®Ÿè£…ãŒ SSO ã§ã™ã€‚ å…·ä½“çš„ã«ã¯ã€std::string ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®ä¸ã«æ–‡å—åˆ—ã‚’æ ¼ç´ã—ã¾ã™ã€‚ ã“ã†ã™ã‚‹ã“ã¨ã§ã€ãƒ¡ãƒ¢ãƒªã‚’ã‚¢ãƒã‚±ãƒ¼ãƒˆã›ãšã«æ–‡å—åˆ—ã‚’æ ¼ç´ã§ãã¾ã™ã€‚ ãŸã ã—ã€ã“ã‚Œã¯å…¨ã¦ã® std::string ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®ã‚µã‚¤ã‚ºãŒå¢—ãˆã‚‹ã“ã¨ã«ãªã‚Šã¾ã™ã€‚ é€šå¸¸ã€std::basic_string ã«ã¯ä»¥ä¸‹ã®ãƒ‡ãƒ¼ã‚¿ãŒå¿…è¦ã«ãªã‚Šã¾ã™ã€‚ æ–‡å—åˆ—ã®å®Ÿä½“ã¸ã®ãƒã‚¤ãƒ³ã‚¿ åˆ©ç”¨ã—ã¦ã„ã‚‹æ–‡å—åˆ—ã®ã‚µã‚¤ã‚ºï¼ˆsizeï¼‰ ç¢ºä¿ã—ã¦ã„ã‚‹é ˜åŸŸã®ã‚ãƒ£ãƒ‘ã‚·
wata_d 2017/04/19
c++
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C/C++ãƒ—ãƒã‚°ãƒ©ãƒžã®ãŸã‚ã®é–‹ç™ºãƒ„ãƒ¼ãƒ« - Cybozu Inside Out | ã‚µã‚¤ãƒœã‚¦ã‚ºã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®ãƒ–ãƒã‚°
ã‚µã‚¤ãƒœã‚¦ã‚ºãƒ»ãƒ©ãƒœã®å…‰æˆã§ã™ã€‚ å…ˆæ—¥ã€ç¤¾å†…ã§ä¸»ã«Linuxä¸Šã§C/C++ã‚’ç”¨ã„ã¦ã„ã‚‹é–‹ç™ºè€…å‘ã‘ã®è¬›ç¾©ã‚’ã—ã¾ã—ãŸã€‚ ã€Œã“ã‚“ãªã“ã¨ãŒã§ãã‚‹ã€ã¨çŸ¥ã£ã¦ã‚‚ã‚‰ã„ã€èˆˆå‘³ã‚’æŒã¦ã°å„è‡ªã§å‹‰å¼·ã—ã¦ã‚‚ã‚‰ãŠã†ã¨åºƒãæµ…ããƒ„ãƒ¼ãƒ«ã‚’ç´¹ä»‹ã—ã¾ã—ãŸã€‚ gtags, ASan, Valgrind, addr2line, cppcheck, SystemTap, perfãªã©ã§ã™ã€‚ èˆˆå‘³ãŒã‚ã‚Œã°è¬›ç¾©è³‡æ–™ã€ŒC/C++ãƒ—ãƒã‚°ãƒ©ãƒžã®ãŸã‚ã®é–‹ç™ºãƒ„ãƒ¼ãƒ«ã€ã‚’ã”ã‚‰ã‚“ãã ã•ã„ã€‚ ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚ªãƒ—ã‚·ãƒ§ãƒ³ å—è¬›è€…ã«ã¯æ–°äººã‚„ã‚µã‚¤ãƒœã‚¦ã‚ºãƒ»ãƒ©ãƒœãƒ¦ãƒ¼ã‚¹ã®å¦ç”Ÿã‚‚ã„ãŸã®ã§åŸºæœ¬çš„ãªã¨ã“ã‚ã‹ã‚‰ç´¹ä»‹ã—ã¾ã—ãŸã€‚ C/C++ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚’ä½¿ã†ã¨ãã¯ã§ãã‚‹ã ã‘è¦å‘Šã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ã¤ã‘ã‚‹ã®ãŒæœ›ã¾ã—ã„ã§ã™ã€‚ è¦å‘ŠãŒå‡ºã‚‹ã®ã¯è‡ªåˆ†ã®ã‚³ãƒ¼ãƒ‰ã®æ›¸ãæ–¹ã«ä¸å‚™ãŒã‚ã‚‹ã“ã¨ãŒå¤šã„ã‹ã‚‰ã§ã™ã€‚ gccã‚„clangã§ã¯-Wall -Wextraã¯åŸºæœ¬ã¨ã—ã¦ãã‚Œä»¥å¤–ã«ã‚‚æœ‰ç”¨ãªã‚ªãƒ—ã‚·ãƒ§ãƒ³ãŒã‚ã‚Šã¾ã™ï¼ˆC++ç”¨
wata_d 2016/09/15
c++
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Is there an easy way to implement AutoResetEvent in C++0x?
wata_d 2016/09/08
c++
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Support For C++11-14-17 Features (Modern C++)
The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com. This article describes C++11/14/17 features in Visual C++. C++11Feature List Visual C++ implements the vast majority of features in the C++11 core language specification, as well as many C++14 Library features and some features proposed for C++17. The following table lists C++11/14/17 core langu
wata_d 2016/06/17
c++
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GitHub - isocpp/CppCoreGuidelines: The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++
The guidelines themselves are found at CppCoreGuidelines. The document is in GH-flavored MarkDown. It is intentionally kept simple, mostly in ASCII, to allow automatic post-processing such as language translation and reformatting. The editors maintain one version formatted for browsing. Note that it is manually integrated and can be slightly older than the version in the master branch. The Guideli
wata_d 2015/10/06
c++
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Microsoft â€“ ã‚¯ãƒ©ã‚¦ãƒ‰ã€ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ãƒ¼ã€ã‚¢ãƒ—ãƒª & ã‚²ãƒ¼ãƒ
ã™ã¹ã¦ã® Microsoft è£½å“ Global Microsoft 365 Teams Copilot Windows Surface Xbox ã‚»ãƒ¼ãƒ« æ³•äººå‘ã‘ ã‚µãƒãƒ¼ãƒˆ ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ Windows ã‚¢ãƒ—ãƒª AI OneDrive Outlook Skype OneNote Microsoft Teams PC ã¨ãƒ‡ãƒã‚¤ã‚¹ Xbox ã‚’è³¼å…¥ã™ã‚‹ ã‚¢ã‚¯ã‚»ã‚µãƒª VR & è¤‡åˆç¾å®Ÿ ã‚¨ãƒ³ã‚¿ãƒ¡ Xbox Game Pass Ultimate Xbox Live Gold Xbox ã¨ã‚²ãƒ¼ãƒ PC ã‚²ãƒ¼ãƒ Windows ã‚²ãƒ¼ãƒ æ˜ ç”»ã¨ãƒ†ãƒ¬ãƒ“ç•ªçµ„ æ³•äººå‘ã‘ Microsoft Cloud Microsoft Security Azure Dynamics 365 ä¸€èˆ¬æ³•äººå‘ã‘ Microsoft 365 Microsoft Industry Microsoft Power Platform W
wata_d 2015/09/30
c++
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C++ - Win32 API ã®å¢ƒç•Œã§ STL æ–‡å—åˆ—ã‚’ä½¿ç”¨ã™ã‚‹
ã“ã®ãƒ–ãƒ©ã‚¦ã‚¶ãƒ¼ã¯ã‚µãƒãƒ¼ãƒˆã•ã‚Œãªããªã‚Šã¾ã—ãŸã€‚ Microsoft Edge ã«ã‚¢ãƒƒãƒ—ã‚°ãƒ¬ãƒ¼ãƒ‰ã™ã‚‹ã¨ã€æœ€æ–°ã®æ©Ÿèƒ½ã€ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£æ›´æ–°ãƒ—ãƒã‚°ãƒ©ãƒ ã€ãŠã‚ˆã³ãƒ†ã‚¯ãƒ‹ã‚«ãƒ« ã‚µãƒãƒ¼ãƒˆã‚’åˆ©ç”¨ã§ãã¾ã™ã€‚ 2015 å¹´ 7 æœˆ Volume 30 Number 7 C++ - Win32 API ã®å¢ƒç•Œã§ STL æ–‡å—åˆ—ã‚’ä½¿ç”¨ã™ã‚‹ Giovanni Dicanio | 2015 å¹´ 7 æœˆ Win32 API ã¯ã€ç´”ç²‹ãª C ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ã‚¤ã‚¹ã‚’ä½¿ç”¨ã—ã¦ã„ãã¤ã‹æ©Ÿèƒ½ã‚’å…¬é–‹ã—ã¦ã„ã¾ã™ã€‚ã¤ã¾ã‚Šã€Win32 API ã®å¢ƒç•Œã§ãƒ†ã‚ã‚¹ãƒˆã‚’äº¤æ›ã™ã‚‹å ´åˆã«ã€C++ ã®æ–‡å—åˆ—ã‚¯ãƒ©ã‚¹ã‚’ãƒã‚¤ãƒ†ã‚£ãƒ–ã«åˆ©ç”¨ã§ããªã„æ©Ÿèƒ½ãŒã‚ã‚Šã¾ã™ã€‚ã“ã®ã‚ˆã†ãªå ´åˆã¯ã€C ã‚¹ã‚¿ã‚¤ãƒ«ã®æ–‡å—ãƒã‚¤ãƒ³ã‚¿ãƒ¼ã‚’ãã®ã¾ã¾ä½¿ç”¨ã—ã¾ã™ã€‚ãŸã¨ãˆã°ã€Win32 SetWindowText é–¢æ•°ã«ã¯ã€æ¬¡ã®ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ãŒã‚ã‚Šã¾ã™ (é–¢é€£ MSDN ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã€bit.ly/1Fkb
wata_d 2015/08/20
c++
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å‰ç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆ vs å¾Œç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆ | é—‡å¤œã®C++
å¾Œç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆã«ã¯ã²ã¨ç›®ã§é…ããªã‚Šãã†ãªå‡¦ç†ãŒè¦‹ã¦å–ã‚Œã¾ã™ãã€‚ å‰ç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆãŒã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆå‡¦ç†å¾Œã€å˜ç´”ã«è‡ªèº«ã®å‚ç…§ã‚’è¿”ã™ã®ã«å¯¾ã—ã€å¾Œç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆã§ã¯ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆå‰ã«ä¸€æ™‚ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®ç”Ÿæˆã€ãã—ã¦ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆå¾Œã«ã¯ãã®å‰ã«ç”Ÿæˆã—ãŸä¸€æ™‚ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’å€¤ã§è¿”ã—ã¦ã„ã¾ã™ã€‚ å‰ç½®ã¨å¾Œç½®ã§ã¯ã€å˜ç´”ã«ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’ã‚³ãƒ”ãƒ¼ã—ã¦è¿”ã™åˆ†ã€æ™®é€šã«è€ƒãˆãŸã‚‰å¾Œç½®ã®æ–¹ãŒé…ã„ã‚ˆãã€‚ã¨ã„ã†ã®ãŒå¾“æ¥ã®èªè˜ã§ã—ãŸã€‚ ã€ŒC++ Coding Standards -101ã®ãƒ«ãƒ¼ãƒ«ã€ã‚¬ã‚¤ãƒ‰ãƒ©ã‚¤ãƒ³ã€ãƒ™ã‚¹ãƒˆãƒ—ãƒ©ã‚¯ãƒ†ã‚£ã‚¹ã€ã®ä¸ã§ã‚‚ã€ç‰¹ã«å¾Œç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆã®å¿…ç„¶æ€§ãŒç„¡ã„æ™‚ã¯è¿·ã‚ãšå‰ç½®ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ãƒˆã‚’ä½¿ã†ã“ã¨ãŒæŽ¨å¥¨ã•ã‚Œã¦ãã¾ã—ãŸã€‚ å…ƒã®å€¤ã‚’å¿…è¦ã¨ã—ãªã„ã¨ãã¯å‰ç½®å½¢å¼ã®æ¼”ç®—åã‚’ä½¿ãŠã† ï¼¿ï¼¿C++ Coding Standards (p50) æ–°ãŸãªä¸»å¼µ ã€Œã‚²ãƒ¼ãƒ ã‚¨ãƒ³ã‚¸ãƒ³ãƒ»ã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒãƒ£ç¬¬äºŒç‰ˆã€ã®ä¸ã®ä¸€ç¯€ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ ã—ã‹
wata_d 2015/04/18
c++
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wata_d 2014/11/14
c++

android
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wata_d 2014/09/08
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game

c++
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wata_d 2014/08/21
c++
ãƒªãƒ³ã‚¯
Effective Modern C++
Get full access to Effective Modern C++ and 60K+ other titles, with a free 10-day trial of O'Reilly. There are also live events, courses curated by job role, and more.
wata_d 2014/07/16
c++
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C++ç¥žScott Meyersã®ã€ŒEffective Modern C++ã€ãƒ‰ãƒ©ãƒ•ãƒˆç‰ˆå…¬é–‹ | ã‚½ãƒ•ãƒˆã‚¢ãƒ³ãƒ†ãƒŠ
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wata_d 2014/07/14
c++
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Accessing C++11 Features of the Android NDK | Dr Dobb's
wata_d 2014/07/01
android

c++
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C++14ã§ã®returnã¨return (â€¦)ã®é•ã„ - Faith and Brave - C++ã§éŠã¼ã†
C++14ã§å°Žå…¥ã•ã‚Œã‚‹decltype(auto)ã‚’ä½¿ã†ã¨ã€returnã¨return (â€¦)ã§æˆ»ã‚Šå€¤ã®åž‹ãŒå¤‰ã‚ã‚‹ã€‚å‰è€…ã¯å€¤ã€å¾Œè€…ã¯å‚ç…§ã¨ãªã‚‹ã€‚ decltype(auto) f() { static int value = 3; return value; } decltype(auto) g() { static int value = 3; return (value); } int main() { int f_result = f(); int& g_result = g(); } å‚ç…§ C++11/14 and return( â€¦ ) vs return - StackOverflow C++14 é€šå¸¸ã®é–¢æ•°ã®æˆ»ã‚Šå€¤åž‹ã‚’æŽ¨è«–
wata_d 2014/06/12
c++
ãƒªãƒ³ã‚¯
ã‚¨ãƒ©ãƒ¼å€¤ã¨æ£å¸¸å€¤ã‚’è¡¨ã™æ±Žç”¨çš„ãªåž‹ï¼šexpected - Faith and Brave - C++ã§éŠã¼ã†
Andrei AlexandrescuãŒè€ƒæ¡ˆã—ãŸExpected<T>ã¨ã„ã†ã‚¯ãƒ©ã‚¹ã‚’ã€ã„ã¾Boostã¨C++æ¨™æº–ã«ææ¡ˆã™ã‚‹å‹•ããŒã‚ã‚Šã¾ã™ã€‚ Vicente Botet Escribaã•ã‚“ã¨Pierre Talbotã•ã‚“ãŒç¾åœ¨é–‹ç™ºã‚’é€²ã‚ã¦ã„ã‚‹expectedã‚¯ãƒ©ã‚¹ã¯ã€ã‚¨ãƒ©ãƒ¼å€¤ã¨æ£å¸¸å€¤ã‚’æ±Žç”¨çš„ã«è¡¨ã™åž‹ã§ã™ã€‚boost::optionalã‚„boost::variantã®äºœç¨®ã§ã€Haskellã‚„Scalaã«ã‚ã‚‹Eitherã‚’ã‚¨ãƒ©ãƒ¼ã«ç‰¹åŒ–ã•ã›ãŸã‚‚ã®ã§ã™ã€‚Haskellçš„ã«ã¯MonadErrorã«ç›¸å½“ã™ã‚‹ãã†ã§ã™ã€‚ç§ã‚‚ä»¥å‰ã€ä¼¼ãŸã‚ˆã†ãªã®ã‚’æ›¸ãã¾ã—ãŸï¼šã€Œã‚¨ãƒ©ãƒ¼è¨±å®¹åž‹ã‚’ä½œã£ãŸã€ã€‚ ã‚¼ãƒå‰²ã‚Šã‚’é©åˆ‡ã«ãƒãƒ³ãƒ‰ãƒªãƒ³ã‚°ã™ã‚‹ã€å®‰å…¨ãªå‰²ã‚Šç®—é–¢æ•°ã«ä¾‹å¤–ã‚’ä½¿ã†ã¨ã€ä»¥ä¸‹ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ã«ãªã‚Šã¾ã™ï¼š struct DivideByZero: public std::exception { â€¦ }; double safe_div
wata_d 2014/05/30
c++
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