Merge branch 'master' into reverse-bits

Author: cuviper

README.md

@@ -16,12 +16,6 @@ Add this to your `Cargo.toml`:
 num-traits = "0.2"
 ```
 
-and this to your crate root:
-
-```rust
-extern crate num_traits;
-```
-
 ## Features
 
 This crate can be used without the standard library (`#![no_std]`) by disabling

build.rs

@@ -17,6 +17,7 @@ fn main() {
     );
 
     ac.emit_expression_cfg("1u32.reverse_bits()", "has_reverse_bits");
+    ac.emit_expression_cfg("1u32.trailing_ones()", "has_leading_trailing_ones");
 
     autocfg::rerun_path("build.rs");
 }

src/bounds.rs

@@ -8,12 +8,38 @@ use core::{u16, u32, u64, u8, usize};
 /// Numbers which have upper and lower bounds
 pub trait Bounded {
     // FIXME (#5527): These should be associated constants
-    /// returns the smallest finite number this type can represent
+    /// Returns the smallest finite number this type can represent
     fn min_value() -> Self;
-    /// returns the largest finite number this type can represent
+    /// Returns the largest finite number this type can represent
     fn max_value() -> Self;
 }
 
+/// Numbers which have lower bounds
+pub trait LowerBounded {
+    /// Returns the smallest finite number this type can represent
+    fn min_value() -> Self;
+}
+
+// FIXME: With a major version bump, this should be a supertrait instead
+impl<T: Bounded> LowerBounded for T {
+    fn min_value() -> T {
+        Bounded::min_value()
+    }
+}
+
+/// Numbers which have upper bounds
+pub trait UpperBounded {
+    /// Returns the largest finite number this type can represent
+    fn max_value() -> Self;
+}
+
+// FIXME: With a major version bump, this should be a supertrait instead
+impl<T: Bounded> UpperBounded for T {
+    fn max_value() -> T {
+        Bounded::max_value()
+    }
+}
+
 macro_rules! bounded_impl {
     ($t:ty, $min:expr, $max:expr) => {
         impl Bounded for $t {