Macros for numeric trait impls

src/approxeq.rs

@@ -15,33 +15,22 @@ pub trait ApproxEq<Eps> {
     fn approx_eq_eps(&self, other: &Self, approx_epsilon: &Eps) -> bool;
 }
 
-impl ApproxEq<f32> for f32 {
-    #[inline]
-    fn approx_epsilon() -> f32 { 1.0e-6 }
-
-    #[inline]
-    fn approx_eq(&self, other: &f32) -> bool {
-       self.approx_eq_eps(other, &1.0e-6)
-    }
-
-    #[inline]
-    fn approx_eq_eps(&self, other: &f32, approx_epsilon: &f32) -> bool {
-       (*self - *other).abs() < *approx_epsilon
-    }
+macro_rules! approx_eq {
+    ($ty:ty, $eps:expr) => (
+        impl ApproxEq<$ty> for $ty {
+            #[inline]
+            fn approx_epsilon() -> $ty { $eps }
+            #[inline]
+            fn approx_eq(&self, other: &$ty) -> bool {
+                self.approx_eq_eps(other, &$eps)
+            }
+            #[inline]
+            fn approx_eq_eps(&self, other: &$ty, approx_epsilon: &$ty) -> bool {
+                (*self - *other).abs() < *approx_epsilon
+            }
+        }
+    )
 }
 
-
-impl ApproxEq<f64> for f64 {
-    #[inline]
-    fn approx_epsilon() -> f64 { 1.0e-6 }
-
-    #[inline]
-    fn approx_eq(&self, other: &f64) -> bool {
-        self.approx_eq_eps(other, &1.0e-6)
-    }
-
-    #[inline]
-    fn approx_eq_eps(&self, other: &f64, approx_epsilon: &f64) -> bool {
-        (*self - *other).abs() < *approx_epsilon
-    }
-}
+approx_eq!(f32, 1.0e-6);
+approx_eq!(f64, 1.0e-6);

src/num.rs

@@ -27,40 +27,51 @@ impl<T: num_traits::One> One for T {
     fn one() -> T { num_traits::One::one() }
 }
 
+
 pub trait Round : Copy { fn round(self) -> Self; }
 pub trait Floor : Copy { fn floor(self) -> Self; }
 pub trait Ceil : Copy { fn ceil(self) -> Self; }
 
-impl Round for f32 { fn round(self) -> Self { self.round() } }
-impl Round for f64 { fn round(self) -> Self { self.round() } }
-impl Round for i16 { fn round(self) -> Self { self } }
-impl Round for u16 { fn round(self) -> Self { self } }
-impl Round for i32 { fn round(self) -> Self { self } }
-impl Round for i64 { fn round(self) -> Self { self } }
-impl Round for u32 { fn round(self) -> Self { self } }
-impl Round for u64 { fn round(self) -> Self { self } }
-impl Round for usize { fn round(self) -> Self { self } }
-impl Round for isize { fn round(self) -> Self { self } }
-
-impl Floor for f32 { fn floor(self) -> Self { self.floor() } }
-impl Floor for f64 { fn floor(self) -> Self { self.floor() } }
-impl Floor for i16 { fn floor(self) -> Self { self } }
-impl Floor for u16 { fn floor(self) -> Self { self } }
-impl Floor for i32 { fn floor(self) -> Self { self } }
-impl Floor for i64 { fn floor(self) -> Self { self } }
-impl Floor for u32 { fn floor(self) -> Self { self } }
-impl Floor for u64 { fn floor(self) -> Self { self } }
-impl Floor for usize { fn floor(self) -> Self { self } }
-impl Floor for isize { fn floor(self) -> Self { self } }
-
-impl Ceil for f32 { fn ceil(self) -> Self { self.ceil() } }
-impl Ceil for f64 { fn ceil(self) -> Self { self.ceil() } }
-impl Ceil for i16 { fn ceil(self) -> Self { self } }
-impl Ceil for u16 { fn ceil(self) -> Self { self } }
-impl Ceil for i32 { fn ceil(self) -> Self { self } }
-impl Ceil for i64 { fn ceil(self) -> Self { self } }
-impl Ceil for u32 { fn ceil(self) -> Self { self } }
-impl Ceil for u64 { fn ceil(self) -> Self { self } }
-impl Ceil for usize { fn ceil(self) -> Self { self } }
-impl Ceil for isize { fn ceil(self) -> Self { self } }
+macro_rules! num_int {
+    ($ty:ty) => (
+        impl Round for $ty {
+            #[inline]
+            fn round(self) -> $ty { self }
+        }
+        impl Floor for $ty {
+            #[inline]
+            fn floor(self) -> $ty { self }
+        }
+        impl Ceil for $ty {
+            #[inline]
+            fn ceil(self) -> $ty { self }
+        }
+    )
+}
+macro_rules! num_float {
+    ($ty:ty) => (
+        impl Round for $ty {
+            #[inline]
+            fn round(self) -> $ty { self.round() }
+        }
+        impl Floor for $ty {
+            #[inline]
+            fn floor(self) -> $ty { self.floor() }
+        }
+        impl Ceil for $ty {
+            #[inline]
+            fn ceil(self) -> $ty { self.ceil() }
+        }
+    )
+}
 
+num_int!(i16);
+num_int!(u16);
+num_int!(i32);
+num_int!(u32);
+num_int!(i64);
+num_int!(u64);
+num_int!(isize);
+num_int!(usize);
+num_float!(f32);
+num_float!(f64);

src/trig.rs

@@ -15,36 +15,18 @@ pub trait Trig {
     fn tan(self) -> Self;
 }
 
-impl Trig for f32 {
-    #[inline]
-    fn sin(self) -> f32 {
-        self.sin()
-    }
-
-    #[inline]
-    fn cos(self) -> f32 {
-       self.cos()
-    }
-
-    #[inline]
-    fn tan(self) -> f32 {
-       self.tan()
-    }
+macro_rules! trig {
+    ($ty:ty) => (
+        impl Trig for $ty {
+            #[inline]
+            fn sin(self) -> $ty { self.sin() }
+            #[inline]
+            fn cos(self) -> $ty { self.cos() }
+            #[inline]
+            fn tan(self) -> $ty { self.tan() }
+        }
+    )
 }
 
-impl Trig for f64 {
-    #[inline]
-    fn sin(self) -> f64 {
-        self.sin()
-    }
-
-    #[inline]
-    fn cos(self) -> f64 {
-       self.cos()
-    }
-
-    #[inline]
-    fn tan(self) -> f64 {
-       self.tan()
-    }
-}
+trig!(f32);
+trig!(f64);