rollup merge of #20264: nagisa/threadrng

Since runtime is removed, rust has no tasks anymore and everything is moving
from being task-* to thread-*. Let’s rename TaskRng as well!

This is a breaking change. If a breaking change for consistency is not desired, feel free to close.

src/test/bench/core-std.rs

@@ -83,7 +83,7 @@ fn read_line() {
 }
 
 fn vec_plus() {
-    let mut r = rand::task_rng();
+    let mut r = rand::thread_rng();
 
     let mut v = Vec::new();
     let mut i = 0;
@@ -101,7 +101,7 @@ fn vec_plus() {
 }
 
 fn vec_append() {
-    let mut r = rand::task_rng();
+    let mut r = rand::thread_rng();
 
     let mut v = Vec::new();
     let mut i = 0;
@@ -122,7 +122,7 @@ fn vec_append() {
 }
 
 fn vec_push_all() {
-    let mut r = rand::task_rng();
+    let mut r = rand::thread_rng();
 
     let mut v = Vec::new();
     for i in range(0u, 1500) {

src/test/compile-fail/task-rng-isnt-sendable.rs

@@ -8,14 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ensure that the TaskRng isn't/doesn't become accidentally sendable.
+// ensure that the ThreadRng isn't/doesn't become accidentally sendable.
 
 use std::rand;
 
 fn test_send<S: Send>() {}
 
 pub fn main() {
-    test_send::<rand::TaskRng>();
+    test_send::<rand::ThreadRng>();
     //~^ ERROR `core::kinds::Send` is not implemented
     //~^^ ERROR `core::kinds::Send` is not implemented
 }

src/test/run-make/unicode-input/multiple_files.rs

@@ -10,7 +10,7 @@
 
 use std::{char, os};
 use std::io::{File, Command};
-use std::rand::{task_rng, Rng};
+use std::rand::{thread_rng, Rng};
 
 // creates unicode_input_multiple_files_{main,chars}.rs, where the
 // former imports the latter. `_chars` just contains an identifier
@@ -19,7 +19,7 @@ use std::rand::{task_rng, Rng};
 // this span used to upset the compiler).
 
 fn random_char() -> char {
-    let mut rng = task_rng();
+    let mut rng = thread_rng();
     // a subset of the XID_start Unicode table (ensuring that the
     // compiler doesn't fail with an "unrecognised token" error)
     let (lo, hi): (u32, u32) = match rng.gen_range(1u32, 4u32 + 1) {

src/test/run-make/unicode-input/span_length.rs

@@ -10,7 +10,7 @@
 
 use std::{char, os};
 use std::io::{File, Command};
-use std::rand::{task_rng, Rng};
+use std::rand::{thread_rng, Rng};
 
 // creates a file with `fn main() { <random ident> }` and checks the
 // compiler emits a span of the appropriate length (for the
@@ -18,7 +18,7 @@ use std::rand::{task_rng, Rng};
 // points, but should be the number of graphemes (FIXME #7043)
 
 fn random_char() -> char {
-    let mut rng = task_rng();
+    let mut rng = thread_rng();
     // a subset of the XID_start Unicode table (ensuring that the
     // compiler doesn't fail with an "unrecognised token" error)
     let (lo, hi): (u32, u32) = match rng.gen_range(1u32, 4u32 + 1) {
@@ -38,7 +38,7 @@ fn main() {
     let main_file = tmpdir.join("span_main.rs");
 
     for _ in range(0u, 100) {
-        let n = task_rng().gen_range(3u, 20);
+        let n = thread_rng().gen_range(3u, 20);
 
         {
             let _ = write!(&mut File::create(&main_file).unwrap(),

src/test/run-pass/vector-sort-panic-safe.rs

@@ -10,7 +10,7 @@
 
 use std::task;
 use std::sync::atomic::{AtomicUint, INIT_ATOMIC_UINT, Relaxed};
-use std::rand::{task_rng, Rng, Rand};
+use std::rand::{thread_rng, Rng, Rand};
 
 const REPEATS: uint = 5;
 const MAX_LEN: uint = 32;
@@ -59,7 +59,7 @@ pub fn main() {
             // IDs start from 0.
             creation_count.store(0, Relaxed);
 
-            let main = task_rng().gen_iter::<DropCounter>()
+            let main = thread_rng().gen_iter::<DropCounter>()
                                  .take(len)
                                  .collect::<Vec<DropCounter>>();