From a9b671c7c3d7373cd27d47a69a3e763cb0c3706b Mon Sep 17 00:00:00 2001
From: Nicolas Silva <nical@fastmail.com>
Date: Tue, 19 Jun 2018 04:41:00 -0700
Subject: [PATCH 1/2] Make the unit a hidden public member instead of private.

---
 src/macros.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/macros.rs b/src/macros.rs
index f828ec8c..66597388 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -18,7 +18,12 @@ macro_rules! define_matrix {
         $(#[$attr])*
         pub struct $name<T, $($phantom),+> {
             $(pub $field: T,)+
-            _unit: PhantomData<($($phantom),+)>
+
+            // Keep this (secretly) public for the few cases where we would like to
+            // create static constants which currently can't be initialized with a
+            // function.
+            #[doc(hidden)]
+            pub _unit: PhantomData<($($phantom),+)>
         }
 
         impl<T: Clone, $($phantom),+> Clone for $name<T, $($phantom),+> {

From 1d44b1638565b4bd28f7b5844da8bde3ada45d2c Mon Sep 17 00:00:00 2001
From: Nicolas Silva <nical@fastmail.com>
Date: Tue, 19 Jun 2018 04:48:32 -0700
Subject: [PATCH 2/2] Make the unit a hidden public member instead of private
 for Scale and Length.

---
 src/length.rs | 2 +-
 src/scale.rs  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/length.rs b/src/length.rs
index ed7f9172..d96fed48 100644
--- a/src/length.rs
+++ b/src/length.rs
@@ -35,7 +35,7 @@ use core::fmt;
 ///
 /// [`TypedScale`]: struct.TypedScale.html
 #[repr(C)]
-pub struct Length<T, Unit>(pub T, PhantomData<Unit>);
+pub struct Length<T, Unit>(pub T, #[doc(hidden)] pub PhantomData<Unit>);
 
 impl<T: Clone, Unit> Clone for Length<T, Unit> {
     fn clone(&self) -> Self {
diff --git a/src/scale.rs b/src/scale.rs
index 44d940a8..4772fa61 100644
--- a/src/scale.rs
+++ b/src/scale.rs
@@ -38,7 +38,7 @@ use {TypedPoint2D, TypedRect, TypedSize2D, TypedVector2D};
 /// let one_foot_in_mm: Length<f32, Mm> = one_foot * mm_per_inch;
 /// ```
 #[repr(C)]
-pub struct TypedScale<T, Src, Dst>(pub T, PhantomData<(Src, Dst)>);
+pub struct TypedScale<T, Src, Dst>(pub T, #[doc(hidden)] pub PhantomData<(Src, Dst)>);
 
 #[cfg(feature = "serde")]
 impl<'de, T, Src, Dst> Deserialize<'de> for TypedScale<T, Src, Dst>