The Haskell language report precisely defines how layout determines structure: https://www.haskell.org/onlinereport/haskell2010/haskellch10.html#x17-17800010.3

The Haskell language report precisely defines how layout determines structure: https://www.haskell.org/onlinereport/haskell2010/haskellch10.html#x17-17800010.3 https://www.haskell.org/onlinereport/haskell2010/haskellch10... Any language that uses layout to determine structure should have a similarly precise definition.