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style: Improve #[derive(Parse)].

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I want to do this so that I can get rid of Either<>. The reasons for getting rid
of either are multiple:

 * It doesn't generate as nice C++ code using cbindgen.
 * It isn't that nice to use either from Rust.
 * cbindgen has bugs with zero-sized types.

I started using this for ColorOrAuto and a few others, for now.

Differential Revision: https://phabricator.services.mozilla.com/D19844
This commit is contained in:
Emilio Cobos Álvarez 2019-02-14 20:45:10 +01:00
parent 6118e4d993
commit 73d5b82f9f
24 changed files with 238 additions and 362 deletions
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4
components/style/values/computed/ui.rs
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@ -8,14 +8,10 @@ use crate::values::computed::color::Color;
use crate::values::computed::url::ComputedImageUrl;
use crate::values::computed::Number;
use crate::values::generics::ui as generics;
use crate::values::{Auto, Either};
pub use crate::values::specified::ui::CursorKind;
pub use crate::values::specified::ui::{MozForceBrokenImageIcon, UserSelect};
/// auto | <color>
pub type ColorOrAuto = Either<Color, Auto>;
/// A computed value for the `cursor` property.
pub type Cursor = generics::Cursor<CursorImage>;