lib.customisation.mapCrossIndex

Takes a function and applies it pointwise to each field of a cross index.

A cross index (short for "Cross Platform Pair Index") is a 6-field structure organizing values by cross-compilation platform relationships.

Inputs

f

Function to apply to each cross index value

crossIndex

A cross index to transform

Type

mapCrossIndex :: (a -> b) -> {
  buildBuild :: a;
  buildHost :: a;
  buildTarget :: a;
  hostHost :: a;
  hostTarget :: a;
  targetTarget :: a;
} -> {
  buildBuild :: b;
  buildHost :: b;
  buildTarget :: b;
  hostHost :: b;
  hostTarget :: b;
  targetTarget :: b;
}

Examples

mapCrossIndex (x: x * 10) { buildBuild = 1; buildHost = 2; ... }
=> { buildBuild = 10; buildHost = 20; ... }

# Extract a package from package sets
mapCrossIndex (pkgs: pkgs.hello) crossIndexedPackageSets

Noogle detected

• lib.mapCrossIndex

mapCrossIndex =
    f:
    {
      buildBuild,
      buildHost,
      buildTarget,
      hostHost,
      hostTarget,
      targetTarget,
    }:
    {
      buildBuild = f buildBuild;
      buildHost = f buildHost;
      buildTarget = f buildTarget;
      hostHost = f hostHost;
      hostTarget = f hostTarget;
      targetTarget = f targetTarget;
    };