For what is worth, Dhall lets you check if an expression is already in normal form: http://hackage.haskell.org/package/dhall-1.6.0/docs/Dhall-Core.html#v:isNorm

For what is worth, Dhall lets you check if an expression is already in normal form: http://hackage.haskell.org/package/dhall-1.6.0/docs/Dhall-Core.html#v:isNormalized http://hackage.haskell.org/package/dhall-1.6.0/docs/Dhall-Co... so one could use Dhall as a "data-only" language without bothering with evaluation.