CODEWITHSUNDEEP
sedbackslash
Sufen
Sufen

Reputation: 35

How to use sed to delete patterns including backslash on MacOS?

I'm trying to use sed to delete patterns like "\subsection{sometext}",

so from:

Important astrophysical issues could be solved...

\subsection{ Introduction\good line}

\subsection{? apple $ fast burry }white

abc

I want:

Important astrophysical issues could be solved...

white

abc

I have tried:

sed -E -i '' 's/\\(section|subsection|subsubsection)\{([^\}]+)\}//g' test.tex

but the result is:

Important astrophysical issues could be solved...

\subsection{ Introduction\good line}

white

abc

It seems that the text including backslash fails to match. I use MacOS.

Upvotes: 1

Views: 57

Answers (1)

georgexsh
georgexsh

Reputation: 16624

} inside [] does not need escaping, so:

's/\\(section|subsection|subsubsection)\{([^}]+)\}//g'

simply works.

you could see the rules in re_format(7):

... With the exception of these and some combinations using `[' (see next paragraphs), all other special characters, including `\', lose their special significance within a bracket expression.

Upvotes: 1

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