この記事は「言語実装 Advent Calendar 2025」の3日目の記事です。 この記事は、新しくプログラミング言語を設計する際に文字列型をどうするべきかについて、私の持論をまとめたものです。 以前「新しくプログラミング言語を作る際に数値型をどうするべきか」という記事を書きましたが、この記事はそれの文字列版です。 推敲が足りずに同じことを何箇所かで繰り返している場合がありますが、冗長性だと思ってご容赦ください……。 【2025年12月4日 更新】small string optimization、スライスとGCの話を追加、Rubyの文言の修正、可変性と値セマンティクスの記述の整理など。完全な変更履歴はGitHubを見てください。 【2025年12月7日 更新】ケーススタディーにJava、D、Schemeを追加。JavaScript文字列のコードポイント単位のアクセスの記述を追加。Sw
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open source. We provide some benchmarks, perspective, why we did this in the first place and what it cost us with exciting ideas from Hyrum’s Law to reinforcement learning. All changes went into open source and thus I can
Text editors can be an interesting challenge to program. The types of problems that text editors need to solve can range from trivial to mind-bogglingly difficult. Recently, I have been on something of a spiritual journey to rework some internal data structures in an editor I have been building, specifically the most fundamental data structure to any text editor: the text. Table of Contents Resour
CUDA C/C++ Basics
© NVIDIA Corporation 2011 CUDA C/C++ Basics Supercomputing 2011 Tutorial Cyril Zeller, NVIDIA Corporation © NVIDIA Corporation 2011 What is CUDA? CUDA Architecture Expose GPU computing for general purpose Retain performance CUDA C/C++ Based on industry-standard C/C++ Small set of extensions to enable heterogeneous programming Straightforward APIs to manage devices, memory etc. This
Rust Language Cheat Sheet 26. August 2021 Contains clickable links to The Book , Rust by Example , Std Docs , Nomicon , Reference . Data Structures Data types and memory locations defined via keywords. Example Explanation struct S {} Define a struct with named fields. struct S { x: T } Define struct with named field x of type T. struct S (T); Define "tupled" struct with numbered field .0 of type
Large Text Compression Benchmark Matt Mahoney Last update: Mar. 25, 2026. history This competition ranks lossless data compression programs by the compressed size (including the size of the decompression program) of the first 109 bytes of the XML text dump of the English version of Wikipedia on Mar. 3, 2006. About the test data. The goal of this benchmark is not to find the best overall compress
Zig 言語リファレンス
index.md これは Zig ドキュメント 0.10.1 を DeepL Pro と ChatGPT を利用して翻訳したものです。 一部 master なモノもあります、ごちゃ混ぜです 自分用に翻訳しています zig_doc_0.10.1.md Zig 言語リファレンス はじめに Zig は、堅牢で最適かつ再利用可能なソフトウェアを維持するための汎用プログラミング言語およびツールチェインです。 ロバスト メモリ不足などのエッジケースでも正しく動作する。 最適化 プログラムが最適に動作・実行されるように記述する。 再利用可能 同じコードが、制約の異なる多くの環境で動作します。 保守性 コンパイラや他のプログラマに意図を正確に伝えることができる。コードを読むためのオーバーヘッドが少なく、要件や環境の変化に強い言語です。 新しいことを学ぶのに一番効率的な方法は例を見ることであることが多いので
Following up from the last post, there is a lot more we need to cover. This was intended to be the post where we talk exclusively about benchmarks and numbers. But, I have unfortunately been perfectly taunted and status-locked, like a monster whose “aggro” was pulled by a tank. The reason, of course, is due to a few folks taking issue with my outright dismissal of the C and C++ APIs (and not showi
地面を見下ろす少年の足蹴にされる私
文書の一覧 JTC1/SC22/WG21 - Papers mailing2025-12 全部で113本あります。 もくじ N5011 Brno 2026 N5029 WG21 2025-10 Kona Admin telecon minutes N5031 WG21 2025-11 Kona Minutes of Meeting N5032 Working Draft, Standard for Programming Language C++ N5033 Editors' Report - Programming Languages - C++ P1317R2 Remove return type deduction in std::apply P1789R2 Library Support for Expansion Statements P1789R3 Library Suppor
strlcpy and how CPUs can defy common sense 24 Jul 2024 Recently one of my older post about strlcpy has sparked some discussion on various forums. Presumably the recently released POSIX edition had something to do with it. One particular counter-argument was raised by multiple posters - and it's an argument that I've heard before as well: In the common case where the source string fits in to the de
The downsides of C++ Coroutines
This blog post aims to shed light on the potential risks associated with transitioning a codebase to incorporate coroutines. Continual misuse of coroutines may result in software vulnerabilities and performance degradation. Coroutines, even in the absence of multi-threading, demand a level of caution comparable to writing multi-threaded code due to their asynchronous nature. Understanding and prop
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新しくプログラミング言語を作る際に文字列型をどうするべきか
Changing std::sort at Google’s Scale and Beyond
Text Editor Data Structures
https://cheats.rs/rust_cheat_sheet.pdf
Large Text Compression Benchmark
cuneicode, and the Future of Text in C
strlcpy and how CPUs can defy common sense