Re: [Haskell-cafe] Efficiency of passing function arguments

On Sat, 4 Apr 2020, KS wrote:

and we want to pass doc to a function, we should ideally hope that doc is not getting duplicated when passing it as an argument.

In Haskell, values are immutable and thus there is no need to copy. Values and parameters are always references. Due to laziness a value references a union. This union is in the beginning a generating function and once the value gots evaluated, it is the computed value.