doc: update character class syntax - [[:alpha:]] not [:alpha:] Fixes issue 116. TBR=rsc CC=re2-dev https://codereview.appspot.com/150600043
diff --git a/doc/syntax.txt b/doc/syntax.txt index d9a3dbc..23e9012 100644 --- a/doc/syntax.txt +++ b/doc/syntax.txt
@@ -7,8 +7,8 @@ [^xyz] negated character class \d Perl character class \D negated Perl character class -[:alpha:] ASCII character class -[:^alpha:] negated ASCII character class +[[:alpha:]] ASCII character class +[[:^alpha:]] negated ASCII character class \pN Unicode character class (one-letter name) \p{Greek} Unicode character class \PN negated Unicode character class (one-letter name) @@ -169,20 +169,20 @@ \V not vertical space NOT SUPPORTED ASCII character classes: -[:alnum:] alphanumeric (== [0-9A-Za-z]) -[:alpha:] alphabetic (== [A-Za-z]) -[:ascii:] ASCII (== [\x00-\x7F]) -[:blank:] blank (== [\t ]) -[:cntrl:] control (== [\x00-\x1F\x7F]) -[:digit:] digits (== [0-9]) -[:graph:] graphical (== [!-~] == [A-Za-z0-9!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~]) -[:lower:] lower case (== [a-z]) -[:print:] printable (== [ -~] == [ [:graph:]]) -[:punct:] punctuation (== [!-/:-@[-`{-~]) -[:space:] whitespace (== [\t\n\v\f\r ]) -[:upper:] upper case (== [A-Z]) -[:word:] word characters (== [0-9A-Za-z_]) -[:xdigit:] hex digit (== [0-9A-Fa-f]) +[[:alnum:]] alphanumeric (== [0-9A-Za-z]) +[[:alpha:]] alphabetic (== [A-Za-z]) +[[:ascii:]] ASCII (== [\x00-\x7F]) +[[:blank:]] blank (== [\t ]) +[[:cntrl:]] control (== [\x00-\x1F\x7F]) +[[:digit:]] digits (== [0-9]) +[[:graph:]] graphical (== [!-~] == [A-Za-z0-9!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~]) +[[:lower:]] lower case (== [a-z]) +[[:print:]] printable (== [ -~] == [ [:graph:]]) +[[:punct:]] punctuation (== [!-/:-@[-`{-~]) +[[:space:]] whitespace (== [\t\n\v\f\r ]) +[[:upper:]] upper case (== [A-Z]) +[[:word:]] word characters (== [0-9A-Za-z_]) +[[:xdigit:]] hex digit (== [0-9A-Fa-f]) Unicode character class names--general category: C other 