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diff --git a/third_party/rust/euclid/src/lib.rs b/third_party/rust/euclid/src/lib.rs
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+// Copyright 2013 The Servo Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![cfg_attr(not(test), no_std)]
+
+//! A collection of strongly typed math tools for computer graphics with an inclination
+//! towards 2d graphics and layout.
+//!
+//! All types are generic over the scalar type of their component (`f32`, `i32`, etc.),
+//! and tagged with a generic Unit parameter which is useful to prevent mixing
+//! values from different spaces. For example it should not be legal to translate
+//! a screen-space position by a world-space vector and this can be expressed using
+//! the generic Unit parameter.
+//!
+//! This unit system is not mandatory and all structures have an alias
+//! with the default unit: `UnknownUnit`.
+//! for example ```default::Point2D<T>``` is equivalent to ```Point2D<T, UnknownUnit>```.
+//! Client code typically creates a set of aliases for each type and doesn't need
+//! to deal with the specifics of typed units further. For example:
+//!
+//! ```rust
+//! use euclid::*;
+//! pub struct ScreenSpace;
+//! pub type ScreenPoint = Point2D<f32, ScreenSpace>;
+//! pub type ScreenSize = Size2D<f32, ScreenSpace>;
+//! pub struct WorldSpace;
+//! pub type WorldPoint = Point3D<f32, WorldSpace>;
+//! pub type ProjectionMatrix = Transform3D<f32, WorldSpace, ScreenSpace>;
+//! // etc...
+//! ```
+//!
+//! All euclid types are marked `#[repr(C)]` in order to facilitate exposing them to
+//! foreign function interfaces (provided the underlying scalar type is also `repr(C)`).
+//!
+#![deny(unconditional_recursion)]
+
+pub use crate::angle::Angle;
+pub use crate::box2d::Box2D;
+pub use crate::homogen::HomogeneousVector;
+pub use crate::length::Length;
+pub use crate::point::{point2, point3, Point2D, Point3D};
+pub use crate::scale::Scale;
+pub use crate::transform2d::Transform2D;
+pub use crate::transform3d::Transform3D;
+pub use crate::vector::{bvec2, bvec3, BoolVector2D, BoolVector3D};
+pub use crate::vector::{vec2, vec3, Vector2D, Vector3D};
+
+pub use crate::box3d::{box3d, Box3D};
+pub use crate::rect::{rect, Rect};
+pub use crate::rigid::RigidTransform3D;
+pub use crate::rotation::{Rotation2D, Rotation3D};
+pub use crate::side_offsets::SideOffsets2D;
+pub use crate::size::{size2, size3, Size2D, Size3D};
+pub use crate::translation::{Translation2D, Translation3D};
+pub use crate::trig::Trig;
+
+#[macro_use]
+mod macros;
+
+mod angle;
+pub mod approxeq;
+pub mod approxord;
+mod box2d;
+mod box3d;
+mod homogen;
+mod length;
+pub mod num;
+mod point;
+mod rect;
+mod rigid;
+mod rotation;
+mod scale;
+mod side_offsets;
+mod size;
+mod transform2d;
+mod transform3d;
+mod translation;
+mod trig;
+mod vector;
+
+/// The default unit.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct UnknownUnit;
+
+pub mod default {
+    //! A set of aliases for all types, tagged with the default unknown unit.
+
+    use super::UnknownUnit;
+    pub type Length<T> = super::Length<T, UnknownUnit>;
+    pub type Point2D<T> = super::Point2D<T, UnknownUnit>;
+    pub type Point3D<T> = super::Point3D<T, UnknownUnit>;
+    pub type Vector2D<T> = super::Vector2D<T, UnknownUnit>;
+    pub type Vector3D<T> = super::Vector3D<T, UnknownUnit>;
+    pub type HomogeneousVector<T> = super::HomogeneousVector<T, UnknownUnit>;
+    pub type Size2D<T> = super::Size2D<T, UnknownUnit>;
+    pub type Size3D<T> = super::Size3D<T, UnknownUnit>;
+    pub type Rect<T> = super::Rect<T, UnknownUnit>;
+    pub type Box2D<T> = super::Box2D<T, UnknownUnit>;
+    pub type Box3D<T> = super::Box3D<T, UnknownUnit>;
+    pub type SideOffsets2D<T> = super::SideOffsets2D<T, UnknownUnit>;
+    pub type Transform2D<T> = super::Transform2D<T, UnknownUnit, UnknownUnit>;
+    pub type Transform3D<T> = super::Transform3D<T, UnknownUnit, UnknownUnit>;
+    pub type Rotation2D<T> = super::Rotation2D<T, UnknownUnit, UnknownUnit>;
+    pub type Rotation3D<T> = super::Rotation3D<T, UnknownUnit, UnknownUnit>;
+    pub type Translation2D<T> = super::Translation2D<T, UnknownUnit, UnknownUnit>;
+    pub type Translation3D<T> = super::Translation3D<T, UnknownUnit, UnknownUnit>;
+    pub type Scale<T> = super::Scale<T, UnknownUnit, UnknownUnit>;
+    pub type RigidTransform3D<T> = super::RigidTransform3D<T, UnknownUnit, UnknownUnit>;
+}