constify and deinline some methods

output/src/coordinate.rs

@@ -1,12 +1,6 @@
 use std::fmt::{Debug, Display};
 use std::ops::{Add, Sub, Mul, Div};
 
-impl Coordinate for u16 {
-    #[inline] fn plus (self, other: Self) -> Self {
-        self.saturating_add(other)
-    }
-}
-
 /// A linear coordinate.
 pub trait Coordinate: Send + Sync + Copy
     + Add<Self, Output=Self>
@@ -19,13 +13,19 @@ pub trait Coordinate: Send + Sync + Copy
     + Into<usize>
     + Into<f64>
 {
-    #[inline] fn zero () -> Self { 0.into() }
-    #[inline] fn minus (self, other: Self) -> Self {
+    fn zero () -> Self { 0.into() }
+    fn plus (self, other: Self) -> Self;
+    fn minus (self, other: Self) -> Self {
         if self >= other {
             self - other
         } else {
             0.into()
         }
     }
-    fn plus (self, other: Self) -> Self;
+}
+
+impl Coordinate for u16 {
+    fn plus (self, other: Self) -> Self {
+        self.saturating_add(other)
+    }
 }