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Bump syn/quote in style_derive
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12 changed files with 302 additions and 338 deletions
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@ -6,52 +6,54 @@ use animate::AnimationVariantAttrs;
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use cg;
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use quote::Tokens;
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use syn::{DeriveInput, Path};
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use synstructure;
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pub fn derive(input: DeriveInput) -> Tokens {
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let name = &input.ident;
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let trait_path = &["values", "distance", "ComputeSquaredDistance"];
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let trait_path = parse_quote!(values::distance::ComputeSquaredDistance);
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let (impl_generics, ty_generics, mut where_clause) =
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cg::trait_parts(&input, trait_path);
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cg::trait_parts(&input, &trait_path);
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let input_attrs = cg::parse_input_attrs::<DistanceInputAttrs>(&input);
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let variants = cg::variants(&input);
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let mut match_body = quote!();
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let mut append_error_clause = variants.len() > 1;
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match_body.append_all(variants.iter().map(|variant| {
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let attrs = cg::parse_variant_attrs::<AnimationVariantAttrs>(variant);
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let s = synstructure::Structure::new(&input);
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let mut append_error_clause = s.variants().len() > 1;
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let mut match_body = s.variants().iter().fold(quote!(), |body, variant| {
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let attrs = cg::parse_variant_attrs::<AnimationVariantAttrs>(&variant.ast());
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if attrs.error {
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append_error_clause = true;
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return None;
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return body;
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}
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let name = cg::variant_ctor(&input, variant);
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let (this_pattern, this_info) = cg::ref_pattern(&name, &variant, "this");
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let (other_pattern, other_info) = cg::ref_pattern(&name, &variant, "other");
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let (this_pattern, this_info) = cg::ref_pattern(&variant, "this");
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let (other_pattern, other_info) = cg::ref_pattern(&variant, "other");
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let sum = if this_info.is_empty() {
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quote! { ::values::distance::SquaredDistance::Value(0.) }
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} else {
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let mut sum = quote!();
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sum.append_separated(this_info.iter().zip(&other_info).map(|(this, other)| {
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where_clause.add_trait_bound(&this.field.ty);
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where_clause.add_trait_bound(&this.ast().ty);
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quote! {
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::values::distance::ComputeSquaredDistance::compute_squared_distance(#this, #other)?
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}
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}), "+");
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}), quote!(+));
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sum
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};
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Some(quote! {
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quote! {
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#body
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(&#this_pattern, &#other_pattern) => {
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Ok(#sum)
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}
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})
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}));
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}
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});
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if append_error_clause {
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if let Some(fallback) = input_attrs.fallback {
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match_body.append(quote! {
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match_body.append_all(quote! {
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(this, other) => #fallback(this, other)
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});
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} else {
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match_body.append(quote! { _ => Err(()) });
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match_body.append_all(quote! { _ => Err(()) });
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}
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}
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