Module tvix_eval::value::attrs

This module implements Nix attribute sets. They have flexible backing implementations, as they are used in very versatile use-cases that are all exposed the same way in the language surface.

Due to this, construction and management of attribute sets has some peculiarities that are encapsulated within this module.

Structs

• Iter
  Iterator over a Nix attribute set.
• Keys
• NixAttrs
• OwnedAttrsIterator
  Wrapper type which hides the internal implementation details from users.

Enums

• AttrsRep 🔒
• IntoIterRepr
  Internal representation of an owning attrset iterator
• IterKV
  Internal helper type to track the iteration status of an iterator over the name/value representation.
• KeyValue
  Iterator representation over the keys and values of an attribute set.
• KeysInner 🔒

Statics

• NAME 🔒
• VALUE 🔒

Functions

• attempt_optimise_kv 🔒
  In Nix, name/value attribute pairs are frequently constructed from literals. This particular case should avoid allocation of a map, additional heap values etc. and use the optimised KV variant instead.
• set_attr 🔒
  Set an attribute on an in-construction attribute set, while checking against duplicate keys.