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構文解æžã«ã¾ã¤ã‚ã‚‹å°è©±ãŸã¡ | κeenã®Happy Hacκing Blog
# 構文解æžã«ã¾ã¤ã‚ã‚‹å°è©±ãŸã¡ ---------------------- [#peg_study](https://twitter.com/search?q=%23peg_study&src=typd&vertical=default&f=tweets) === # About Me ---------  + κeen + [@blackenedgold](https://twitter.com/blackenedgold) + Github: [KeenS](https://github.com/KeenS) + サイãƒã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆã®æ–°å’エンジニア + Lisp, ML, Shell Scriptã‚ãŸã‚Šã‚’書ãã¾ã™ === # ウォームアップ === # 構文解æžã¯ãƒãƒƒãƒ‰ãƒŽã‚¦ãƒã‚¦ -----------------------
Introduction to PEG
2. 背景 ï¯ å¤šæ§˜ãªå…¥åŠ›æ–‡å—列を構文解æžã™ã‚‹å¿…è¦æ€§ ï® ï¼ˆè‰²ã€…ãªãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã®ï¼‰è¨å®šãƒ•ã‚¡ã‚¤ãƒ« ï® Webã®ã‚¯ãƒãƒ¼ãƒªãƒ³ã‚° ï¯ "Cargo cult parsing" (from Yacc is dead) ã®æµè¡Œ ï® Googleã§æ¤œç´¢ã—ã¦æ£è¦è¡¨ç¾ã‚’拾ã£ã¦ãã¦ã€ãƒ†ã‚トウã«ã‚³ãƒ”ー ＆ペーストã—ã¦ãƒ‘ーザを作るã“ã¨ ï® ã€Œã ã„ãŸã„ã®å…¥åŠ›ã«å¯¾ã—ã¦ãã‚Œãªã‚Šã«ã†ã¾ãåƒãã€ä¸å®Œå…¨ãªãƒ‘ー ザ ï¯ Cargo cult parsingを追放ã›ã‚ˆï¼ 3. 構文解æžã£ã¦ä½•ï¼Ÿ ï¯ ä¸€è¨€ã§ã„ã†ã¨ï¼š ï® å…¥åŠ›æ–‡å—åˆ—ã‚’æœ¨æ§‹é€ ï¼ˆAbstract Syntax Tree) ã«çµ„ã¿ç«‹ã¦ã‚‹æœæŸ» ï¯ äºŒç¨®é¡žã«åˆ†ã‘られる ï® è‡ªç„¶è¨€èªžã®æ§‹æ–‡è§£æž ï¯ æ§‹æ–‡è§£æžã®çµæžœã‚ã„ã¾ã„性ãŒç”Ÿã˜ã‚‹ã“ã¨ãŒã‚ã‚‹ ï® éžè‡ªç„¶è¨€èªžã®æ§‹æ–‡è§£æž â†ä»Šå›žæ‰±ã†ã‚‚ã® ï¯ æ§‹æ–‡è§£æžã®çµæžœã‚ã„ã¾ã„性ãŒç”Ÿã˜ãªã„ 4. 様々ãªæ§‹æ–‡è§£æžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ï¯ CYK - O(n
俺ã®altjsãŒã“ã‚“ãªã«ç°¡å˜ã«pegjsã§ä½œã‚Œã‚‹ã‚ã‘ãŒãªã„ - Qiita
ã“ã®è¨˜äº‹ã¯JavaScript Advent Calender 2014ã®10日目ã®è¨˜äº‹ã§ã™ã€‚ altjs作りãŸã„ã‚„ã‚ åŠå¹´å‰ã«ã“ã‚“ãªLTã‚’ã‚„ã£ãŸã€‚未完æˆã§æ”¾ç½®ã™ã‚‹ã®ã¯æ°—æŒã¡æ‚ªã„ã®ã§ã€ã“ã®æ©Ÿä¼šã«å®Œæˆã•ã›ã‚ˆã†ã¨æ€ã£ãŸâ€¦ã‚“ã ã‘ã©ã€advent当日ã®æ™‚点ã§ã¾ã 完æˆã—ã¦ãªã„。ã™ã¾ã‚“ãªã€‚ãŸã 知見ã¯å¤šå°‘溜ã¾ã£ãŸã®ã§ã€åŸºæœ¬çš„ãªaltjsã®ä½œã‚Šæ–¹ã¨åˆã‚ã›ã¦ç´¹ä»‹ã—よã†ã¨æ€ã†ã€‚ altjsã£ã¦ã©ã†ã‚„ã£ã¦ä½œã‚“ã®ï¼Ÿ 方法ã¯æ§˜ã€…ã ã‘ã©ã€ 文法をPEG(pegjs)ã§è¨˜è¿°ã™ã‚‹ ソースコードをã€Parser APIã§å®šç¾©ã•ã‚Œã‚‹ASTã«å¤‰æ›ã™ã‚‹ãƒã‚¸ãƒƒã‚¯ã‚’書ã 変æ›ã•ã‚ŒãŸASTã‚’ã€escodegenã§JavaScriptã®ã‚³ãƒ¼ãƒ‰ã«ã•ã‚‰ã«å¤‰æ›ã™ã‚‹ ã¨ã„ã†ã®ãŒä»Šãªã‚‰ã‚„ã‚Šã‚„ã™ã„ã¨æ€ã†ã€‚çµå±€ã‚る構文をjsã«å¤‰æ›ã™ã‚‹ã ã‘ã§ã€å¤‰æ›ã¯æ—¢å˜ã®ãƒ„ールを使ãˆã‚‹ã®ã§ã€å®Ÿã¯ãã‚“ãªã«åºƒã„知è˜ã‚’è¦æ±‚ã›ãšã€0ã‹ã‚‰çŽ‹é“ã®ã‚³ãƒ³ãƒ‘イラを作るã¿ãŸã„ãªå£®å¤§ãªè©±ã«
Hyperglot · A Language Experimentation Platform
Documentation Projects Syntax Input Output Decode Export More Get Involved Credits License Hyperglot aims to speed up the way you create and develop programming languages or DSLs. You specify a PEG grammar using Spidermonkey AST primitives and you get a compiler back. Simple as that. To run a release of Hyperglot, you will need to have a node-webkit binary. Projects This is the view presented to y
Peggy.js by clintjhill
Peggy.js - A simpler PEG in JavaScript Description Please visit http://clintjhill.github.com/Peggy.js/ for more information. API Functions (as described here: Parsing Expression Grammar) sequence [val, val] choice ["||", val, val] 0 or more ["*", val] 1 or more ["+", val] optional (0 or 1) ["?", val] and ["&", val] not ["!", val] var css = new Peggy({ "sheet": ["rules", "medias", "imports"], "rule
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GitHub - tolmasky/language: A fast PEG parser written in JavaScript with first class errors
You can read about general PEG features on the wikipedia page here: http://en.wikipedia.org/wiki/Parsing_expression_grammar The most unique addition Language.js makes to PEG is how it handles errors. No parse ever fails in Language.js, instead SyntaxErrorNodes are placed into the resultant tree. This makes it trivial to do things like write syntax highlighters that have live error reporting. This
GitHub - sirthias/pegdown: A pure-Java Markdown processor based on a parboiled PEG parser supporting a number of extensions
Although still one of the most popular Markdown parsing libraries for the JVM, pegdown has reached its end of life. The project is essentially unmaintained with tickets piling up and crucial bugs not being fixed. pegdown's parsing performance isn't great. In some cases of pathological input runtime can even become exponential, which means that the parser either appears to "hang" completely or abor
Parslet – A Simple PEG Parser Framework for Ruby
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. Parslet is a new "simple parser framework" for Ruby built by Kaspar Schiess. It follows the PEG (parsing expression grammar) style of parsing and its primary goals are to be simple, testable, and to have extensive and powerful error reporting features (something that Kaspar states Treetop sorely lacks). If you've already u
Treetop-Ruby用ã®PEGパーサージェãƒãƒ¬ãƒ¼ã‚¿
Spring Bootã«ã‚ˆã‚‹APIãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰æ§‹ç¯‰å®Ÿè·µã‚¬ã‚¤ãƒ‰ 第2版 何åƒäººã‚‚ã®é–‹ç™ºè€…ãŒã€InfoQã®ãƒŸãƒ‹ãƒ–ック「Practical Guide to Building an API Back End with Spring Bootã€ã‹ã‚‰ã€Spring Bootを使ã£ãŸREST API構築ã®åŸºç¤Žã‚’å¦ã‚“ã 。ã“ã®æœ¬ã§ã¯ã€å‡ºç‰ˆæ™‚ã«æ–°ã—ãリリースã•ã‚ŒãŸãƒãƒ¼ã‚¸ãƒ§ãƒ³ã§ã‚ã‚‹ Spring Boot 2 を使用ã—ã¦ã„る。ã—ã‹ã—ã€Spring Boot3ãŒæœ€è¿‘リリースã•ã‚Œã€é‡è¦ãªå¤‰...
Javaã§ä½œã‚‹PEGパーザコンビãƒãƒ¼ã‚¿ - kmizuã®æ—¥è¨˜
パーサジェãƒãƒ¬ãƒ¼ã‚¿ã‚’作る簡å˜ã•ã§è¨€ã†ã¨ã€ PEG <<<< LL(1) <<<< LALR(1) ãらã„ãªæ„Ÿã˜ã®ã‚¤ãƒ¡ãƒ¼ã‚¸ã§ã™ã€‚ http://twitter.com/kmizu/statuses/1183248403 ãªã‚“ã¦å‰ãã†ãªã“ã¨æ›¸ã„ãŸã®ã§ã€(パーザジェãƒãƒ¬ãƒ¼ã‚¿ã˜ã‚ƒãªã„ã‘ã©)PEGパーザコンビãƒãƒ¼ã‚¿ã‚’実際ã«Javaã§æ›¸ã„ã¦ã¿ãŸã€‚æ–‡å—クラスを除ãPEGã®æ©Ÿèƒ½ã®ã»ã¼ãƒ•ãƒ«ã‚»ãƒƒãƒˆã‚’サãƒãƒ¼ãƒˆã™ã‚‹ã®ã‚’目標ã«æ›¸ã„ãŸã®ã§ã€ã‚„や煩雑ã«ãªã£ã¦ã„る。 package jp.gr.java_conf.mizu; import java.util.*; import static java.lang.String.format; public class PEGParserCombinators { public static final class Pair<A, B> { public final A _
Peggy: 新ã—ã„時代ã®ãƒ‘ーザジェãƒãƒ¬ãƒ¼ã‚¿
Peggy: æ–°ã—ã„時代ã®ãƒ‘ーザジェãƒãƒ¬ãƒ¼ã‚¿ç”°ä¸è‹±è¡ŒÂ tanaka.hideyuki@gmail.com 2011-12-16 @ Haskell忘年会 自己紹介田ä¸è‹±è¡ŒÂ (@tanakh, http://tanakh.jp)(æ ª)Preferred Infrastructure 勤務C++ 書ã„ã¦ã¾ã™Haskell愛好家 (2004～)Learn You a Haskell for Great Good! 翻訳ä¸æ¥æ˜¥äºˆå®šC81関数型イカ娘本寄稿予定SS2篇 Peggy: 全ãæ–°ã—ã„パーザジェãƒãƒ¬ãƒ¼ã‚¿Peggyã¨ã¯ï¼Ÿãƒ‘ーザジェãƒãƒ¬ãƒ¼ã‚¿ã®ãƒ¢ãƒ€ãƒ³ãªå®Ÿè£…æ–°ã—ã„構文解æžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ シンプル・簡å˜ãƒ»å¼·åŠ›ãªè¨˜æ³•Quasi-Quoterã§ã‚ã‚‹Haskellコードã¸ã®ã‚·ãƒ¼ãƒ レスãªçµ„ã¿è¾¼ã¿Standalone ãªãƒ‘ーザã¨ã—ã¦ã‚‚利用å¯èƒ½Quasi-Quoter生æˆæ©Ÿèƒ½Haskellコードã®ã‚·ãƒ¼ãƒ レスãªç”ŸæˆUn
PEG Markdown Highlight
Other Pages ↠My Blog ↠Contact Me Other Software/Code by Me icalBuddy setWeblocThumb asprint trash ANSIEscapeHelper CalStoreHelper PEG Markdown Highlight Unmaintained SoftwareTagger LaunchList TagLists ImageFolderQLGenerator Hidden Settings PEG Markdown Highlight This is a syntax highlighter for the Markdown language, designed to be integrated into GUI text editor programs. It uses a recursive-de
QWANTURANK ⇒ Le nouvel algorithme de ranking de Qwant ✅ Concours SEO pour éprouver le classement des sites sur Qwant • Positionnement du mot-clé 'qwanturank' sur le moteur de recherche privé Qwant | qwanturank.ovh
Ce site a gagné le concours de référencement Qwanturank, organisé par le moteur de recherche QWANT, en 2020 ⇒ PAJUNE : référencement SEO & SEA ⇠Introduction : le référencement internet (SEO) Chaque moteur de recherche du web utilise une formule de classement des sites dans ses résultats de recherches (SERP) qui est différente, ce qui explique pourquoi les résultats obtenus pour une même requête n
Packrat Parsing and Parsing Expression Grammars
Introduction Parsing expression grammars (PEGs) are an alternative to context free grammars for formally specifying syntax, and packrat parsers are parsers for PEGs that operate in guaranteed linear time through the use of memoization. For a brief technical summary see the Wikipedia entry on PEGs. For more in-depth descriptions see the original PEG paper and packrat parsing paper, and related pape
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GitHub - kevinmehall/rust-peg: Parsing Expression Grammar (PEG) parser generator for Rust
GitHub - pointlander/peg: Peg, Parsing Expression Grammar, is an implementation of a Packrat parser generator.
文法定義を図示ã™ã‚‹æ–¹æ³• - Qiita
Canopy – A parser compiler
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