ignore boxed closure doctests in the guide/reference

Author: Jorge Aparicio

src/doc/guide-testing.md

@@ -536,7 +536,7 @@ optimizer to consider the result used and ensures it cannot remove the
 computation entirely. This could be done for the example above by adjusting the
 `b.iter` call to
 
-```rust
+```{rust,ignore}
 # struct X; impl X { fn iter<T>(&self, _: || -> T) {} } let b = X;
 b.iter(|| {
     // note lack of `;` (could also use an explicit `return`).
@@ -548,7 +548,7 @@ Or, the other option is to call the generic `test::black_box` function, which
 is an opaque "black box" to the optimizer and so forces it to consider any
 argument as used.
 
-```rust
+```{rust,ignore}
 extern crate test;
 
 # fn main() {

src/doc/guide.md

@@ -4231,7 +4231,7 @@ arguments, really powerful things are possible.
 
 Let's make a closure:
 
-```{rust}
+```{rust,ignore}
 let add_one = |x| { 1 + x };
 
 println!("The sum of 5 plus 1 is {}.", add_one(5));
@@ -4243,7 +4243,7 @@ binding name and two parentheses, just like we would for a named function.
 
 Let's compare syntax. The two are pretty close:
 
-```{rust}
+```{rust,ignore}
 let add_one = |x: i32| -> i32 { 1 + x };
 fn  add_one   (x: i32) -> i32 { 1 + x }
 ```
@@ -4256,7 +4256,7 @@ There's one big difference between a closure and named functions, and it's in
 the name: a closure "closes over its environment." What does that mean? It means
 this:
 
-```{rust}
+```{rust,ignore}
 fn main() {
     let x = 5;
 
@@ -4297,7 +4297,7 @@ now. We'll talk about them more in the "Threads" section of the guide.
 
 Closures are most useful as an argument to another function. Here's an example:
 
-```{rust}
+```{rust,ignore}
 fn twice(x: i32, f: |i32| -> i32) -> i32 {
     f(x) + f(x)
 }
@@ -4311,14 +4311,14 @@ fn main() {
 
 Let's break the example down, starting with `main`:
 
-```{rust}
+```{rust,ignore}
 let square = |x: i32| { x * x };
 ```
 
 We've seen this before. We make a closure that takes an integer, and returns
 its square.
 
-```{rust}
+```{rust,ignore}
 # fn twice(x: i32, f: |i32| -> i32) -> i32 { f(x) + f(x) }
 # let square = |x: i32| { x * x };
 twice(5, square); // evaluates to 50
@@ -4342,7 +4342,7 @@ though, and that function takes an `i32` and returns an `i32`. Notice
 how the `|i32| -> i32` syntax looks a lot like our definition of `square`
 above, if we added the return type in:
 
-```{rust}
+```{rust,ignore}
 let square = |x: i32| -> i32 { x * x };
 //           |i32|    -> i32
 ```
@@ -4357,7 +4357,7 @@ Finally, `twice` returns an `i32` as well.
 
 Okay, let's look at the body of `twice`:
 
-```{rust}
+```{rust,ignore}
 fn twice(x: i32, f: |i32| -> i32) -> i32 {
   f(x) + f(x)
 }
@@ -4375,7 +4375,7 @@ this technique a lot.
 If we didn't want to give `square` a name, we could just define it inline.
 This example is the same as the previous one:
 
-```{rust}
+```{rust,ignore}
 fn twice(x: i32, f: |i32| -> i32) -> i32 {
     f(x) + f(x)
 }
@@ -4388,7 +4388,7 @@ fn main() {
 A named function's name can be used wherever you'd use a closure. Another
 way of writing the previous example:
 
-```{rust}
+```{rust,ignore}
 fn twice(x: i32, f: |i32| -> i32) -> i32 {
     f(x) + f(x)
 }

src/doc/reference.md

@@ -1559,7 +1559,7 @@ Type parameters can be specified for a trait to make it generic. These appear
 after the trait name, using the same syntax used in [generic
 functions](#generic-functions).
 
-```
+``` ignore
 trait Seq<T> {
    fn len(&self) -> uint;
    fn elt_at(&self, n: uint) -> T;
@@ -3217,7 +3217,7 @@ expression's captured environment.
 In this example, we define a function `ten_times` that takes a higher-order
 function argument, and call it with a lambda expression as an argument.
 
-```
+``` ignore
 fn ten_times(f: |int|) {
     let mut i = 0;
     while i < 10 {
@@ -3821,7 +3821,7 @@ or `extern`), a sequence of input types and an output type.
 
 An example of a `fn` type:
 
-```
+``` ignore
 fn add(x: int, y: int) -> int {
   return x + y;
 }
@@ -3849,7 +3849,7 @@ The type of a closure mapping an input of type `A` to an output of type `B` is
 
 An example of creating and calling a closure:
 
-```rust
+``` ignore
 let captured_var = 10i;
 
 let closure_no_args = || println!("captured_var={}", captured_var);