Module 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.