id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
2530,deriving Show adds extra parens for constructor with record syntax,spl,,"Since record construction binds more tightly than function application, no parentheses are needed when passing a constructor with record syntax to a function constructor. As a result, we can pass {{{Just A {x = 5}}}} as shown below.

{{{
module Main where

data A = A {x :: Int} deriving (Show)

main :: IO ()
main = print $ Just A {x = 5}
}}}

But we get the result in the GHCi session below:

{{{
*Main> main
Just (A {x = 5})
}}}

I tried looking through {{{TcGenDeriv}}}, but didn't figure out quite where the parenifying was done. {{{nested_compose_Expr}}}? {{{show_thingies}}}?

I just wanted to make a ticket for general knowledge. Of course, this is not a real bug. Perhaps you could reclassify it as a feature. Either way, it would be nice to have.",bug,new,lowest,7.6.2,Compiler,6.8.3,,,leather@… ndmitchell@…,Unknown/Multiple,Unknown/Multiple,None/Unknown,Unknown,,,,