ruby-re-posix-class.md

ASCII文字¹のPOSIX正規表現クラス分類

クラス2	[:alnum:]	[:alpha:]	[:blank:]	[:cntrl:]	[:digit:]	[:graph:]	[:lower:]	[:print:]	[:punct:]	[:space:]	[:upper:]	[:xdigit:]	[:word:]
[00]-[08] [0e]-[1f] [DEL]	-	-	-	✓	-	-	-	-	-	-	-	-	-
[HT]	-	-	✓	✓	-	-	-	-	-	✓	-	-	-
[LF][VT][FF][CR]	-	-	-	✓	-	-	-	-	-	✓	-	-	-
[SPACE]	-	-	✓	-	-	-	-	✓	-	✓	-	-	-
記号3	-	-	-	-	-	✓	-	✓	✓	-	-	-	-
0-9	✓	-	-	-	✓	✓	-	✓	-	-	-	✓	✓
A-F	✓	✓	-	-	-	✓	-	✓	-	-	✓	✓	✓
G-Z	✓	✓	-	-	-	✓	-	✓	-	-	✓	-	✓
_	-	-	-	-	-	✓	-	✓	✓	-	-	-	✓
a-f	✓	✓	-	-	-	✓	✓	✓	-	-	-	✓	✓
g-z	✓	✓	-	-	-	✓	✓	✓	-	-	-	-	✓

Some formulae

• [:ascii:] = [:ctrl:] + [:print:]
• [:print:] = [:graph:] + " "
• [:graph:] = [:alnum:] + [:punct:]
• [:word:] = [:alnum:] + "_"
• [:alnum:] = [:digit] + [:alpha:]
• [:alpha:] = [:lower:] + [:upper:]

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Footnotes

1. [00]-[7f] ↩

2. Rubyによる拡張である [:ascii:] には [00]-[7f] の範囲の全ての文字がマッチ ↩

3. ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ ` { | } ~ ↩