RST Links containing an URI get parsed twice

[danse]

nested inlines are not allowed in RST but pandoc parses these inlines
recursively. in the case of a link this can lead to a double parsing
due to implicit links. this can garble an RST document going through a
round-trip workflow

$ pandoc --version
pandoc 2.1.4
$ pandoc -f rst -t html | pandoc -f html -t rst
`http://loc <http://loc>`__
` <http://loc>`__\ http://loc
$ pandoc -f rst -t native
`http://loc <http://loc>`__
[Para [Link ("",[],[]) [Link ("",[],[]) [Str "http://loc"] ("http://loc","")] ("http://loc","")]]

[danse]

hi, i don't understand why the solution i proposed three months ago, which follows rST specifications, has been ignored after a discussion while this issue has been closed with a different approach which:

• adds code that fixes the problem only for links, while the problem is more general
• duplicates code adding a processing step rather than updating the parser

the solution i proposed also fixes #4561, which has been closed as unsolvable. this is a confirmation that the problem of nested inlines is better solved in the general case

[danse]

i created #4792 in order to better discuss the topic of parsing nested inlines

[jgm]

@danse I'm sorry, I lost track of your solution here.
I agree that a general approach that follows the rST spec better would be good. (When I originally wrote the rST reader, I didn't realize that nested inlines weren't allowed.)

Anyway, the fix committed above can be reverted and replaced with something better. We'll continue discussion on #4792.

[danse]

@danse I'm sorry, I lost track of your solution here

No worries, with all the activity going on about pandoc i reckon keeping track of conversation isn't easy!