nix data types / published by https://github.com/dacr/code-examples-manager #7e8ab042-cffa-4d78-bf37-21fc5bc024d6/69805f76f01f4ebfb7f733a08d132a13b84125c7

data-types.nix

## summary : nix data types
## keywords : nix, data-types
## publish : gist
## authors : David Crosson
## license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
## id : 7e8ab042-cffa-4d78-bf37-21fc5bc024d6
## created-on : 2025-02-01T10:49:21+01:00
## managed-by : https://github.com/dacr/code-examples-manager
## run-with : nix eval --file $file
#### run-with : nix-instantiate --eval $file

let
  a_int = 2;
  a_float = 40.0;
  a_null = null;
  a_bool = true;
  a_string = "truc";
  a_multiline_string = ''
    truc1
    truc2
    '';
  a_list = [ 42 "something" false ];
  an_attribute_set = {
    a = "blah";
    b = 42;
    c = true;
    d = { d0 = 0; d1 = 1; d2 = 2; };
  };
  a_recursive_attribute_set = rec {
    one = 1;
    two = one + 1;
    three = two + 1;
  };
  a_lambda = x: y: x+y; # currying
  an_other_lambda = {x, y?0}: x+y; # With a default value for an attribute
  an_other_lambda_again = {x, y?0,...}: x+y; # We don't care of any extra attribute
in {
  computed =
    a_int +
    a_float +
    an_attribute_set.d.d0 +
    (a_lambda 1 2) +
    (an_other_lambda {x=1;}) +
    (an_other_lambda_again {x=1;gloups=42;}) +
    ( (x: x * 2) 10) + # direct lambda call
    ( (attrset: attrset.v * 10) {v = 5;}) + # lambda with parameter taken into account as an attribute set
    ( ( {x, y}: x + y) {x=1; y=2;} ) # destructuring
    ;
}