Hi,
John Beckett wrote:
> I want some Vim script to remove percent encoding (where '%'
> followed by two hex digits means the single character with the
> given hex ASCII code, for example '%412' is 'A2').
>
> It's easy to do this using :substitute with:
>
> :s/%\(\x\x\)/\=nr2char('0x'.submatch(1))/g
>
> However, submatch() does not work in substitute(), and
> '\1' cannot be passed to a function (I think).
>
> I would like either of the following to show 'abcAdef':
>
> :echo substitute('abc%41def', '%\(\x\x\)', nr2char('0x'.submatch(1)), 'g')
>
> :echo substitute('abc%41def', '%\(\x\x\)', nr2char('0x\1'), 'g')
>
> But submatch() and \1 do not work here.
>
> How can a submatch be used in an expression in substitute()?
you can use \= in substitute():
:echo substitute('abc%41def', '%\(\x\x\)', '\=nr2char("0x".submatch(1))', 'g')
Regards,
Jürgen
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