Clean up doctests

Also make sure that the macros work when they are imported in isolation.

src/histogram.rs

@@ -10,12 +10,7 @@
 /// # Example
 ///
 /// ```
-/// # extern crate core;
-/// # #[macro_use] extern crate average;
-/// # #[cfg(feature = "serde1")] #[macro_use] extern crate serde_derive;
-/// # #[cfg(feature = "serde1")] #[macro_use] extern crate serde_big_array;
-/// # fn main() {
-/// use average::Histogram;
+/// use average::{Histogram, define_histogram};
 ///
 /// define_histogram!(hist, 10);
 /// let mut h = hist::Histogram::with_const_width(0., 100.);
@@ -23,14 +18,13 @@
 ///     h.add(i as f64).unwrap();
 /// }
 /// assert_eq!(h.bins(), &[10, 10, 10, 10, 10, 10, 10, 10, 10, 10]);
-/// # }
 /// ```
 #[macro_export]
 macro_rules! define_histogram {
     ($name:ident, $LEN:expr) => (
         mod $name {
             use $crate::Histogram as Trait;
-            #[cfg(feature = "serde1")] big_array! {
+            #[cfg(feature = "serde1")] serde_big_array::big_array! {
                 BigArray; LEN, (LEN + 1),
             }
 

src/lib.rs

@@ -90,16 +90,6 @@
 
 #![no_std]
 
-
-
-#[cfg(feature = "serde1")]
-extern crate serde;
-#[cfg(feature = "serde1")]
-#[macro_use] extern crate serde_derive;
-#[cfg(feature = "serde1")]
-#[macro_use] extern crate serde_big_array;
-
-
 #[macro_use] mod macros;
 #[macro_use] mod moments;
 mod weighted_mean;

src/macros.rs

@@ -37,10 +37,7 @@ macro_rules! assert_almost_eq {
 /// # Examples
 ///
 /// ```
-/// # extern crate core;
-/// # #[macro_use] extern crate average;
-/// # fn main() {
-/// use average::{Min, Max, Estimate};
+/// use average::{Min, Max, Estimate, concatenate};
 ///
 /// concatenate!(MinMax, [Min, min], [Max, max]);
 ///
@@ -48,7 +45,6 @@ macro_rules! assert_almost_eq {
 ///
 /// assert_eq!(s.min(), 1.0);
 /// assert_eq!(s.max(), 5.0);
-/// # }
 /// ```
 ///
 /// The generated code looks roughly like this:
@@ -85,15 +81,11 @@ macro_rules! assert_almost_eq {
 /// can do the following:
 ///
 /// ```
-/// # extern crate core;
-/// # #[macro_use] extern crate average;
-/// # fn main() {
-/// use average::{Variance, Quantile, Estimate};
+/// use average::{Variance, Quantile, Estimate, concatenate};
 ///
 /// concatenate!(Estimator,
 ///     [Variance, variance, mean, sample_variance],
 ///     [Quantile, quantile, quantile]);
-/// # }
 /// ```
 #[macro_export]
 macro_rules! concatenate {

src/moments/mod.rs

@@ -31,15 +31,8 @@ pub type MeanWithError = Variance;
 /// # Example
 ///
 /// ```
-/// # extern crate core;
-/// # extern crate conv;
-/// # extern crate num_traits;
-/// #[cfg(feature = "serde1")]
-/// extern crate serde;
-/// #[cfg(feature = "serde1")]
-/// #[macro_use] extern crate serde_derive;
-/// # #[macro_use] extern crate average;
-/// # fn main() {
+/// use average::{define_moments, assert_almost_eq};
+///
 /// define_moments!(Moments4, 4);
 ///
 /// let mut a: Moments4 = (1..6).map(f64::from).collect();
@@ -56,7 +49,6 @@ pub type MeanWithError = Variance;
 /// assert_almost_eq!(a.standardized_moment(3), 0.2795084971874741, 1e-15);
 /// // kurtosis
 /// assert_almost_eq!(a.standardized_moment(4), -1.365 + 3.0, 1e-14);
-/// # }
 /// ```
 #[macro_export]
 macro_rules! define_moments {
@@ -301,6 +293,6 @@ macro_rules! define_moments {
             }
         }
 
-        impl_from_iterator!($name);
+        $crate::impl_from_iterator!($name);
     );
 }

tests/histogram.rs

@@ -1,6 +1,3 @@
-#[cfg(feature = "serde1")]
-#[macro_use] extern crate serde_big_array;
-
 use core::iter::Iterator;
 use rand::SeedableRng;
 use rand_distr::Distribution;