[B! æ§‹æ–‡è§£æž] R2Mã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

R2M id:R2M

æ§‹æ–‡è§£æžã«é–¢ã™ã‚‹R2Mã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (6)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

LR(1)ãƒ‘ãƒ¼ã‚µã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿ã‚’è‡ªä½œã—ã¦æ§‹æ–‡è§£æžã‚’ã™ã‚‹ ç¬¬1å›ž:ã‹ã‚“ãŸã‚“æ§‹æ–‡è§£æžå…¥é–€ | ã‚ãŸã—ã‚ã
LR(1)ãƒ‘ãƒ¼ã‚µã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿ã‚’è‡ªä½œã—ã¦æ§‹æ–‡è§£æžã‚’ã™ã‚‹ ç¬¬1å›ž:ã‹ã‚“ãŸã‚“æ§‹æ–‡è§£æžå…¥é–€ 2016-12-22 03:03:09 Category: dev Tag: parsing parser generator parser lexer ã“ã®è¨˜äº‹ã¯Kobe University Advent Calendar 2016ã®21æ—¥ã®è¨˜äº‹ã§ã™ã€‚ã¾ãŸé…åˆ»ã‹ã€‚ ãªãŠç§ã¯å½“è©²å¤§å¦ã®å¦éƒ¨2å¹´(2016å¹´12æœˆç¾åœ¨)ã§ã™ã€‚ æ§‹æ–‡è§£æžãŒã§ãã‚‹ãƒ—ãƒã‚°ãƒ©ãƒžã¯ã¡ã‚‡ã£ã¨ã‹ã£ã“ã„ã„ã§ã™ã‚ˆãã€‚ ã€Œæ§‹æ–‡è§£æžï¼Ÿã‚ã‚ã€ã§ãã¾ã™ã‚ˆã€ã¨ã‹è¨€ã£ã¦è‡ªåˆ†ã®ã‚¹ã‚ãƒ«ã‚’è‡ªæ…¢ã§ããã†ãªå°è±¡ãŒã‚ã‚Šã¾ã™ã€‚ (ã»ã¼)ãƒ•ãƒ«ã‚¹ã‚¯ãƒ©ãƒƒãƒã§TypeScriptã«ã‚ˆã‚‹LR(1)ãƒ‘ãƒ¼ã‚µã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿ã‚’å®Ÿè£…ã—ãŸ(ã¤ã„ã§ã«LALR(1)ãƒ‘ãƒ¼ã‚µã‚‚ä½œã‚Œã‚‹)ã®ã§ã€ã“ã‚Œã‚’å®Œæˆã•ã›ã‚‹ã¾ã§ã®æµã‚Œã‚’ç´¹ä»‹ã—ã¦ã„ã“ã†ã¨æ€ã„ã¾ã™ã€‚ ä»Šå›žã¯æ§‹æ–‡è§£æžè‡ªä½“ã®å…¥é–€ç·¨ã¨ãªã‚Šã¾ã™ã€‚ è‡ªä½œã—ãŸãƒ‘ãƒ¼ã‚µ
R2M 2021/09/18
æ§‹æ–‡è§£æž

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
ä½•ã¨ãªãå‹‰å¼·ã—ãŸæ°—åˆ†ã«ãªã‚Œã‚‹ãƒ‘ãƒ¼ã‚µå…¥é–€
17. MicroMarkæ–‡æ³• start = doc doc = block+ block = headline / blankline / paragraph headline = "#"+ " " textline paragraph = textline+ blankline textline = !headline inline+ "n" inline = char char = [^n] blankline = "n" 20. MicroMark for PEG.js start = doc doc = block:block+ { return "<body>"+block.join("")+"</body>"; } block = headline / blankline / paragraph headline = preï¬x:"#"+ " " textline:text
R2M 2021/07/09
æ§‹æ–‡è§£æž
ãƒªãƒ³ã‚¯
Introduction to PEG
2. èƒŒæ™¯ ï¯ å¤šæ§˜ãªå…¥åŠ›æ–‡å—åˆ—ã‚’æ§‹æ–‡è§£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‚’æ‹¾ã£ã¦ãã¦ã€ãƒ†ã‚ãƒˆã‚¦ã«ã‚³ãƒ”ãƒ¼ ï¼†ãƒšãƒ¼ã‚¹ãƒˆã—ã¦ãƒ‘ãƒ¼ã‚¶ã‚’ä½œã‚‹ã“ã¨ ï® ã€Œã ã„ãŸã„ã®å…¥åŠ›ã«å¯¾ã—ã¦ãã‚Œãªã‚Šã«ã†ã¾ãåƒãã€ä¸å®Œå…¨ãªãƒ‘ãƒ¼ ã‚¶ ï¯ Cargo cult parsingã‚’è¿½æ”¾ã›ã‚ˆï¼ 3. æ§‹æ–‡è§£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‘ã‚‰ã‚Œã‚‹ ï® è‡ªç„¶è¨€èªžã®æ§‹æ–‡è§£æž ï¯ æ§‹æ–‡è§£æžã®çµæžœã‚ã„ã¾ã„æ€§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„æ€§ãŒç”Ÿã˜ãªã„ 4. æ§˜ã€…ãªæ§‹æ–‡è§£æžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ï¯ CYK - O(n
R2M 2015/08/08
æ§‹æ–‡è§£æž

programming
ãƒªãƒ³ã‚¯
ãƒ“ã‚¸ãƒ¥ã‚¢ãƒ«æ§‹æ–‡è§£æž
ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã§ç”¨ã„ã‚‰ã‚Œã‚‹æ§‹æ–‡è§£æžã®æ‰‹æ³•ã‚’å›³è§£ã§è§£èª¬ã€‚ æ¼”ç®—åé †ä½æ³•ãƒ»LRæ³•ãƒ»å†å¸°ä¸‹é™æ§‹æ–‡è§£æžãƒ»Backtrack parsingãƒ»Packrat parsingãƒ»å·¦å†å¸°ã‚’è¨±ã™Packrat parsingã‚’æ‰±ã£ã¦ã„ã¾ã™ã€‚ éžå¸¸ã«é•·ã„ã§ã™ãŒãƒ‘ãƒ©ãƒ‘ãƒ©æ¼«ç”»çš„ãªæ„Ÿè¦šã§èªã‚“ã§ã¿ã¦ãã ã•ã„ã€‚Read less
R2M 2015/08/08
æ§‹æ–‡è§£æž

programming
ãƒªãƒ³ã‚¯
LALRã§è§£æžã§ãã¦LLã§å‡ºæ¥ãªã„å ´åˆã¯ï¼Ÿ - OKWAVE
LL(n)æ§‹æ–‡è§£æžæ©Ÿã§ã®é«˜é€ŸåŒ–æ‰‹æ³• ãƒ—ãƒã‚°ãƒ©ãƒ è¨€èªžã®å‡¦ç†ç³»ã®å‹‰å¼·ã®ãŸã‚ã«ã€å®Ÿéš›ã«å‡¦ç†ç³»ã‚’ä½œæˆã—ã¦ã¿ã¦ã„ã¾ã™ å››å‰‡æ¼”ç®—ãªã©ã®åŸºç¤Žçš„ãªã¨ã“ã‚ãŒå‹•ãã‚ˆã†ã«ãªã£ã¦å–œã‚“ã§ã„ãŸã®ã§ã™ãŒ æ¬¡ã®ã‚ˆã†ãªæ–‡æ³•ã§å¤§ããè§£æžé€Ÿåº¦ãŒè½ã¡ã¦ã—ã¾ã†ã¨ã„ã†å•é¡ŒãŒèµ·ãã¦ã—ã¾ã„ã¾ã—ãŸ (æ§‹æ–‡è§£æžã ã‘ã§ï¼‘åˆ†ã»ã©ã‹ã‹ã£ã¦ã—ã¾ã„ã¾ã—ãŸ) ->(n) do if( n.(==)(1), do 1 end, do n.(*)(fact(n.(-)(1))) end ) end æ–‡æ³•ã®è©³ç´°ã¯ä½•ã¨ãªãå¯Ÿã—ã¦ã„ãŸã ãã¨ã—ã¦ è§£æžé€Ÿåº¦ã®å¤§ããªä½Žä¸‹ã®åŽŸå› ã‚’æŽ¢ã£ã¦ã¿ãŸã¨ã“ã‚ æ‹¬å¼§ã€Œ()ã€ã®å…¥ã‚ŒåéšŽå±¤ãŒæ·±ãå…¥ã‚Šçµ„ã‚€ã»ã©å€ã€…ã‚²ãƒ¼ãƒ ã§è§£æžé€Ÿåº¦ãŒè½ã¡ã¦ã„ã‚‹å‡¦ã¾ã§çµžã‚Šè¾¼ã‚ã¦ãã¾ã—ãŸ ãŠãã‚‰ãé–‰ã˜æ‹¬å¼§ã€Œ)ã€ã‚’å…ˆèªã¿ã—ã¦ã‚‚é–“é•ã£ãŸã‚‚ã®ã‚’æ‹¾ã£ã¦å¤±æ•—ã—ã¦ã„ã‚‹ã®ã§ã¯ãªã„ã‹ãªã¨æŽ¨æ¸¬ã—ã¦ã„ã¾ã™ ä¸€å¿œä½¿ã£ã¦ã„ã‚‹ç’°å¢ƒã¯ä¸‹ã«æŒ™ã’ã¾ã™ãŒ ãŠãã‚‰ãã¯LL(n)æ§‹æ–‡è§£æžã§ã®ä¸€èˆ¬çš„ãª
R2M 2015/01/05
æ§‹æ–‡è§£æž
ãƒªãƒ³ã‚¯
Rzubr - ãƒ”ãƒ¥ã‚¢ Ruby ãªãŠã‚‚ã¡ã‚ƒã® LALR(1) æ§‹æ–‡è§£æžå™¨ - Tociyuki::Diary
Ruby ã§è¨˜è¿°ã—ã¦ã‚ã‚‹ LALR(1) æ§‹æ–‡è§£æžãƒ„ãƒ¼ãƒ«ã¨ã„ãˆã° Racc ã ã€ ã¨ç›¸å ´ã¯æ±ºã¾ã£ã¦ã„ã¦ã€ç§ã‚‚ä¾¿åˆ©ã«åˆ©ç”¨ã—ã¦ã„ã¾ã™ã€‚ãŸã ã—ã€Racc ã¯å®Ÿç”¨æ€§å„ªå…ˆã§ã€ã‚ã¾ã‚Šã« Bison ã‚’æ„è˜ã—ã™ãŽã¦ã„ã‚‹ä¸Šã«ã€é€Ÿåº¦å„ªå…ˆã€å†…éƒ¨ã®ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®æ§‹é€ ãŒã¤ãã‚Šã“ã¾ã‚Œã™ãŽã¨ãã¦ã€ã„ã˜ãã£ã¦ä½™è¨ˆãªæ©Ÿèƒ½ã‚’ã¤ã‘ã¦éŠã‚“ã§ã¿ã‚ˆã†ã¨ã‹ã€æ©Ÿèƒ½ã‚’ã¡ã‚‡ã£ã¨å¤‰ãˆã¦ã¿ã‚ˆã†ã¨ã‹ã™ã‚‹ã«ã¯ã€ã¾ã£ãŸãã‚‚ã£ã¦å‘ã„ã¦ã„ã¾ã›ã‚“ã€‚ å®Ÿç”¨æ€§ã‚ˆã‚Šã‚‚ã€å†…éƒ¨ã‚’ã„ã˜ã£ã¦éŠã¶ã®ã«å‘ã„ãŸå°æ°—å‘³ã®è‰¯ã„ãƒ”ãƒ¥ã‚¢ Ruby ãª LALR(1) æ§‹æ–‡è§£æžå™¨ã‚‚ã‚ã£ã¦è‰¯ã„ã®ã§ã¯ãªã„ã‹ã¨è€ƒãˆã¦ã€ä½œã£ã¦ã¿ã¾ã—ãŸã€‚æ§‹æ–‡è§£æžè¡¨ã®ç”Ÿæˆéƒ¨ã¨é§†å‹•éƒ¨ã‚’ã™ã¹ã¦çµ„ã¿è¾¼ã‚“ã§ã€500 è¡Œç¨‹åº¦ã®ã‚³ãƒ³ãƒ‘ã‚¯ãƒˆãªè§£æžå™¨å‡¦ç†ç³»ã§ã™ã€‚æ§‹æ–‡è¨˜è¿°ã¯ãƒãƒƒã‚·ãƒ¥ã¨é…åˆ—ã«å„ªå…ˆé †ä½ã¨ç”Ÿæˆè¦å‰‡ã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã‚’ä¸¦ã¹ã‚‹ã ã‘ã§è‰¯ã„ã®ã§ã™ãŒã€å°‘ã—ã¯è¨˜è¿°æ€§ã‚’ä¸Šã’ã¦ã¿ã‚ˆã†ã¨ã®è©¦ã¿ã§ã€Ruby ã®çµ„ã¿è¾¼ã¿æ¼”ç®—åã‚’ä½¿ã£ã¦ç”Ÿæˆè¦å‰‡ã‚’
R2M 2015/01/05
Ruby

æ§‹æ–‡è§£æž
ãƒªãƒ³ã‚¯
1