Implement #[animate(fallback)] for #[derive(Animate)]

This allows us to derive the Animate trait, providing a fallback function
for when the 2 values aren't similar.
This commit is contained in:
Anthony Ramine 2017-08-26 16:25:28 +02:00
parent 3751fe9fdc
commit 4a4bf89575
7 changed files with 99 additions and 121 deletions

View file

@ -2,7 +2,7 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use darling::{FromField, FromVariant};
use darling::{FromDeriveInput, FromField, FromVariant};
use quote::{ToTokens, Tokens};
use std::borrow::Cow;
use std::collections::HashSet;
@ -276,6 +276,16 @@ where
}
}
pub fn parse_input_attrs<A>(input: &DeriveInput) -> A
where
A: FromDeriveInput,
{
match A::from_derive_input(input) {
Ok(attrs) => attrs,
Err(e) => panic!("failed to parse input attributes: {}", e),
}
}
pub fn parse_variant_attrs<A>(variant: &Variant) -> A
where
A: FromVariant,