INNER CODE UNIT · Rust

word_wrapper_derive

0xMiden/crypto · miden-crypto-derive/src/lib.rs:136

pub fn word_wrapper_derive(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as DeriveInput);

    let name = &input.ident;
    let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();

    // Validate that this is a tuple struct with a single field
    let field_type = match &input.data {
        Data::Struct(data_struct) => match &data_struct.fields {
            Fields::Unnamed(fields) if fields.unnamed.len() == 1 => match fields.unnamed.first() {
                Some(field) => &field.ty,
                None => {
                    return syn::Error::new_spanned(
                        &input,
                        "WordWrapper requires exactly one field",
                    )
                    .to_compile_error()
                    .into();

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