Add #![feature] attributes to doctests

7 files changed, 22 insertions, 0 deletions

diff --git a/src/librand/distributions/exponential.rs b/src/librand/distributions/exponential.rs
index 3180f03cfd3..0c5f5cb0d44 100644
--- a/src/librand/distributions/exponential.rs
+++ b/src/librand/distributions/exponential.rs
@@ -60,6 +60,7 @@ impl Rand for Exp1 {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{Exp, IndependentSample};
 ///
diff --git a/src/librand/distributions/gamma.rs b/src/librand/distributions/gamma.rs
index 8eaac203fb4..d04e83e84f7 100644
--- a/src/librand/distributions/gamma.rs
+++ b/src/librand/distributions/gamma.rs
@@ -40,6 +40,7 @@ use super::{IndependentSample, Sample, Exp};
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{IndependentSample, Gamma};
 ///
@@ -187,6 +188,7 @@ impl IndependentSample<f64> for GammaLargeShape {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{ChiSquared, IndependentSample};
 ///
@@ -244,6 +246,7 @@ impl IndependentSample<f64> for ChiSquared {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{FisherF, IndependentSample};
 ///
@@ -288,6 +291,7 @@ impl IndependentSample<f64> for FisherF {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{StudentT, IndependentSample};
 ///
diff --git a/src/librand/distributions/mod.rs b/src/librand/distributions/mod.rs
index a46709932e2..5cafb8d2e5e 100644
--- a/src/librand/distributions/mod.rs
+++ b/src/librand/distributions/mod.rs
@@ -94,6 +94,7 @@ pub struct Weighted<T> {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{Weighted, WeightedChoice, IndependentSample};
 ///
diff --git a/src/librand/distributions/normal.rs b/src/librand/distributions/normal.rs
index d07964624bf..7cecc6ac611 100644
--- a/src/librand/distributions/normal.rs
+++ b/src/librand/distributions/normal.rs
@@ -76,6 +76,7 @@ impl Rand for StandardNormal {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{Normal, IndependentSample};
 ///
@@ -124,6 +125,7 @@ impl IndependentSample<f64> for Normal {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand;
 /// use std::rand::distributions::{LogNormal, IndependentSample};
 ///
diff --git a/src/librand/distributions/range.rs b/src/librand/distributions/range.rs
index 4086e149e78..e6f27a28ffa 100644
--- a/src/librand/distributions/range.rs
+++ b/src/librand/distributions/range.rs
@@ -36,6 +36,7 @@ use distributions::{Sample, IndependentSample};
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand::distributions::{IndependentSample, Range};
 ///
 /// fn main() {
diff --git a/src/librand/lib.rs b/src/librand/lib.rs
index 8de773e9fec..9f6399ff12d 100644
--- a/src/librand/lib.rs
+++ b/src/librand/lib.rs
@@ -149,6 +149,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand, core)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut v = [0; 13579];
@@ -184,6 +185,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut rng = thread_rng();
@@ -202,6 +204,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut rng = thread_rng();
@@ -229,6 +232,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut rng = thread_rng();
@@ -247,6 +251,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut rng = thread_rng();
@@ -261,6 +266,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let s: String = thread_rng().gen_ascii_chars().take(10).collect();
@@ -277,6 +283,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let choices = [1, 2, 4, 8, 16, 32];
@@ -297,6 +304,7 @@ pub trait Rng : Sized {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand, core)]
     /// use std::rand::{thread_rng, Rng};
     ///
     /// let mut rng = thread_rng();
@@ -360,6 +368,7 @@ pub trait SeedableRng<Seed>: Rng {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{Rng, SeedableRng, StdRng};
     ///
     /// let seed: &[_] = &[1, 2, 3, 4];
@@ -375,6 +384,7 @@ pub trait SeedableRng<Seed>: Rng {
     /// # Examples
     ///
     /// ```
+    /// # #![feature(rand)]
     /// use std::rand::{Rng, SeedableRng, StdRng};
     ///
     /// let seed: &[_] = &[1, 2, 3, 4];
@@ -480,6 +490,7 @@ impl Rand for XorShiftRng {
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand::{random, Open01};
 ///
 /// let Open01(val) = random::<Open01<f32>>();
@@ -497,6 +508,7 @@ pub struct Open01<F>(pub F);
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand::{random, Closed01};
 ///
 /// let Closed01(val) = random::<Closed01<f32>>();
diff --git a/src/librand/reseeding.rs b/src/librand/reseeding.rs
index 81e65da37fc..95dd986d2e3 100644
--- a/src/librand/reseeding.rs
+++ b/src/librand/reseeding.rs
@@ -103,6 +103,7 @@ impl<S, R: SeedableRng<S>, Rsdr: Reseeder<R> + Default>
 /// # Examples
 ///
 /// ```
+/// # #![feature(rand)]
 /// use std::rand::{Rng, SeedableRng, StdRng};
 /// use std::rand::reseeding::{Reseeder, ReseedingRng};
 ///