Defines language items.
Language items are items that represent concepts intrinsic to the language itself. Examples are:
- Traits that specify “kinds”; e.g.,
- Traits that represent operators; e.g.,
- Functions called by the compiler itself.
All of the language items, defined or not. Defined lang items can come from the current crate or its dependencies.
A mapping from the name of the lang item to its order and the form it must be of.
Extracts the first
lang = "$name" out of a list of attributes.
are also extracted out when found.