| use crate::{ |
| FromDeriveInput, FromField, FromGenericParam, FromGenerics, FromMeta, FromTypeParam, |
| FromVariant, Result, |
| }; |
| |
| /// A container to parse some syntax and retain access to the original. |
| #[derive(Debug, Clone, PartialEq, Eq)] |
| pub struct WithOriginal<T, O> { |
| pub parsed: T, |
| pub original: O, |
| } |
| |
| impl<T, O> WithOriginal<T, O> { |
| pub fn new(parsed: T, original: O) -> Self { |
| WithOriginal { parsed, original } |
| } |
| } |
| |
| macro_rules! with_original { |
| ($trayt:ident, $func:ident, $syn:path) => { |
| impl<T: $trayt> $trayt for WithOriginal<T, $syn> { |
| fn $func(value: &$syn) -> Result<Self> { |
| Ok(WithOriginal::new($trayt::$func(value)?, value.clone())) |
| } |
| } |
| }; |
| } |
| |
| with_original!(FromDeriveInput, from_derive_input, syn::DeriveInput); |
| with_original!(FromField, from_field, syn::Field); |
| with_original!(FromGenerics, from_generics, syn::Generics); |
| with_original!(FromGenericParam, from_generic_param, syn::GenericParam); |
| with_original!(FromMeta, from_meta, syn::Meta); |
| with_original!(FromTypeParam, from_type_param, syn::TypeParam); |
| with_original!(FromVariant, from_variant, syn::Variant); |