Vim regex to substitute/escape pipe characters

Question

Let\'s suppose I have a line:

a|b|c

I\'d like to run a regex to convert it to:

a\\|b\\|c

In most regex engine

Answer 1

vim has its own regex syntax. There is a comparison with PCRE in vim help doc (see :help perl-patterns).

except for that, vim has no magic/magic/very magic mode. :h magic to check the table.

by default, vim has magic mode. if you want to make the :s command in your question work, just active the very magic:

:s/\v\|/\\|/g