impl_index

Macro index

Source 
index!() { /* proc-macro */ }
Expand description

Derive Index & IndexMut implementations.

index!(Struct by Enum => mut u8:
    UnitVariant => field_1,
    pat Enum::Array(idx) if idx < 10 => pat array_field[idx],
    pat Enum::Thing(Thing::One) => thing_1,
    pat _ => thing_2,
);

See crate-level docs for a full example.