Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-05 21:50:18 +01:00
Code Issues Projects Releases Packages Wiki Activity

Bump syn/quote in style_derive

Browse source
This commit is contained in:
Bastien Orivel 2018-02-12 16:49:28 +01:00
parent cf6330b6c1
commit 9faa579c89
12 changed files with 302 additions and 338 deletions
Download patch file Download diff file Expand all files Collapse all files

38
components/style_derive/compute_squared_distance.rs
View file

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