'Swapping words with pure Regex

I'd like to swap two words using capture groups in Vim using only one line of regex, but I cannot find a solution to this for example

word1
word2

expecting:
word2
word1

get:
word1
word2

I've also tried s/(word1)(word2)/\2\1/g but they don't swap their position or even replace

Is there any way I can achieve this?

regexvimvi


Solution 1:[1]

I am all for designing under hard constraints but pragmatism has value, too. What good is it to wait for someone else to write you a super fancy one-liner when you can write three super simple commands on the spot?

:%s/word1/§§§§/g
:%s/word2/word1/g
:%s/§§§§/word2/g

If you really dig the mystique of one-liners:

:%s/word1/§§§§/g|%s/word2/word1/g|%s/§§§§/word2/g

Solution 2:[2]

I doubt this exactly what you looking for, however Tim Pope's Abolish provides the :Subvert/:S command which can make swapping easy

:%S/{foo,bar}/{bar,foo}/gw

This will swap the following:

foo -> bar
bar -> foo

:Subvert takes similar flags to :s. I am using w for word-wise and g for global

Sources

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Source: Stack Overflow

Solution Source
Solution 1 romainl
Solution 2 Peter Rincker

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