Macro adt_reflect 

adt_reflect!() { /* proc-macro */ }

Generate reflection information for ADTs.

The input should be structs and enums, which will be emitted as-is and in addition, reflection information will be generated. This information is exposed by generating two macros: - field_of!($ty:ty, $field:ident)

this macro returns the field representing type of the given field. It implements the Subplace trait.

Note that this macro also supports fields of enum variants via the syntax field_of!(MyEnum::Variant, field). - variant_of!($enum:ty, $variant:ident)

this macro returns the variant type of the given variant, which has the same layout as the enum itself, but is statically guaranteed to be in the given variant. In pattern type terms, this is just pattern_type!($enum is $variant { .. }) or pattern_type!($enum is $variant(..)) depending on the variant having named or unnamed fields.