Show and Read instance

From HaskellWiki

What shall the Show and Read instances show and parse, respectively? It is certainly a good thing, if

• read
  parses, what
  show
  shows.

The next question is:

Shall emit valid Haskell code,

that represents the shown data, or shall it show something user friendly, maybe even something that is formatted in a line-oriented way.

• Meaning of Show and Read I
• Meaning of Show and Read II
• Raw vs. Show
• Show instance for Tree

Category: Style