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Utility types for attribute parsing.

Structs

Marker type equivalent to Option<()> for use in attribute parsing.

A wrapper for an Ident which also keeps the value as a string.

An efficient way of discarding data from a syntax element.

A list of syn::Path instances. This type is used to extract a list of paths from an attribute.

A value and an associated position in source code. The main use case for this is to preserve position information to emit warnings from proc macros. You can use a SpannedValue<T> as a field in any struct that implements or derives any of darling’s core traits.

A container to parse some syntax and retain access to the original.

Enums

A value which can inherit a default value or have an explicit value specified.