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32 lines
1,003 B
Rust
32 lines
1,003 B
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use cg;
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use quote;
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use syn;
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use synstructure::BindStyle;
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pub fn derive(input: syn::DeriveInput) -> quote::Tokens {
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let name = &input.ident;
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let (impl_generics, ty_generics, where_clause) = cg::trait_parts(
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&input,
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&["values", "animated", "ToAnimatedZero"],
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);
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let to_body = cg::fmap_match(&input, BindStyle::Ref, |field| {
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quote! { ::values::animated::ToAnimatedZero::to_animated_zero(#field)? }
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});
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quote! {
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impl #impl_generics ::values::animated::ToAnimatedZero for #name #ty_generics #where_clause {
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#[allow(unused_variables)]
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#[inline]
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fn to_animated_zero(&self) -> Result<Self, ()> {
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Ok(match *self {
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#to_body
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})
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}
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}
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}
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}
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