FromAttr

Main entry point. Derived via macro. Anything that can be parsed from one or multiple attributes.

AttributeNamed

Values that can be parsed named, e.g. name(<value>), name = <value>, name (as flag).

This is the default parsing mode used for fields in derived FromAttr implementations.

AttributePositional

Values that can be parsed positionally, i.e., without a name, e.g. "literal", a + b, true.

When deriving FromAttr this is enabled via putting #[attr(positional)] on the field.

AttributeValue

Any attribute that has the concept of a value, e.g., "positional", meta(<value>), key = <value>.

PositionalValue

Empty marker trait, defining which AttributeValue implement AttributePositional.

AttributeMeta

Values in function or meta style attributes, i.e., meta(<value>).