Regx & Litgrep

Simple script to convert things like:

begin digit repeat 5 space one_or_more digit repeats 2 5

Into:

^[[:digit:]]{5}[[:space:]]+[[:digit:]]{2,5}

Use it as a command expansion:

egrep $( regx any_of A-Z X zero_or_more )

In addition, you can use litgrep:

litgrep any_of A-Z digit -- file1.txt file2.txt

Mappings

• any_char - .
• zero_or_more - *
• one_or_more - +
• start - ^
• end - $
• digit - [[:digit:]]
• not_digit - [^[:digit:]]
• alpha - [[:alpha:]]
• not_alpha - [^[:alpha:]]
• blank - [[:blank:]]
• not_blank - [^[:blank:]]
• space - [[:space:]]
• not_space - [^[:space:]]
• or - |
• optional - ?
• open_group - (
• close_group - )
• any_of X - [X]
• none_of X - [^X]
• group X - (X)
• hex ff - \xff
• repeat 5 - {5}
• repeats 1 5 - {1,5}
• at_least 3 - {3,}
• literal ABC - ABC
• range A Z A-Z
• cr, lf, tab, bell, esc, ff, vt - special characters