How to change Haskell code formatting rules in VS Code-CodePudding

I'm using VS Code with the Haskell extension v2.2.1 and the Haskell Syntax Highlighting extension v3.6.0.

When I write:

data Name = Name
  { first :: String
  , last :: String }

And I invoke formats election on it I end up with

data Name = Name
  { first :: String,
    last :: String
  }

How can I change this behaviour, so that it keeps the first way of formatting (with leading commas)?

CodePudding user response：

The default formatter for the Haskell extension is ormolu which always uses trailing commas.

In the VSCode settings for the Haskell extension you can choose a different formatter. For example fourmolu which is a fork of ormolu with more configuration options. It has a setting for the comma style:

comma-style | leading, trailing | Where to place commas in lists, tuples, etc.