@torkleyy This is quite an annoying bug and I am not sure if this is the right way forward to fix it. The problem is that RawValue will have to be annoying in one of two ways:

a) RawValue::from_ron("/*hi*/ 42 /*bye*/") works as expected (i.e. any valid ron, except for attributes, can be used in the constructor and will be pasted literally into the output). However, deserialising only roundtrips if no pretty serialising is used since any pretty whitespace or comments will be eaten up by the raw value upon the next deserialising. I'm going with this option right now.

b) RawValue::from_ron("/*hi*/ ( /*yay*/ 42 /*lol*/ ) /*bye*/") only keeps ( /*yay*/ 42 /*lol*/ ) (so all whitespace before and after the first non-whitespace is lost), but roundtripping works since additional pretty whitespace is dropped.

Which one would you prefer?

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.04% 🎉

Comparison is base (a293382) 95.27% compared to head (6abc432) 95.32%.

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@@            Coverage Diff             @@
##           master     #487      +/-   ##
==========================================
+ Coverage   95.27%   95.32%   +0.04%     
==========================================
  Files          74       74              
  Lines        8852     8936      +84     
==========================================
+ Hits         8434     8518      +84     
  Misses        418      418              

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Approach a seems like the better one, yeah.