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Re: [Bug-ed] Global substitutions that insert newlines

From: Antonio Diaz Diaz
Subject: Re: [Bug-ed] Global substitutions that insert newlines
Date: Mon, 15 Oct 2018 19:18:57 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv: Gecko/20110420 SeaMonkey/2.0.14

Hello Rob,

Rob Arthan wrote:
I have a script that uses ed to generate C string definitions from nroff output.
It makes essential use of global substitutions with a newline as the 
replacement text, e.g.,


This functionality is no longer available as of version 1.14 of GNU ed. Is there
a work-around for this?

This functionality was removed from GNU ed because inside a global command the meaning of the escaped newline becomes ambiguous. The POSIX standard documents it:


"A line can be split by substituting a <newline> into it. The application shall ensure it escapes the <newline> in the replacement by preceding it by <backslash>. Such substitution cannot be done as part of a g or v command list."

The workaround is to use 'sed' to split a line in this way. I think sed does not have this problem because it does not need a 'global' command.

Best regards,
The right to self-determination is not conditional. All peoples have it, including the catalan people.

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