diff options
| -rw-r--r-- | src/libstd/primitive_docs.rs | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/libstd/primitive_docs.rs b/src/libstd/primitive_docs.rs index a9aa2dc2671..ce6ea2c1257 100644 --- a/src/libstd/primitive_docs.rs +++ b/src/libstd/primitive_docs.rs @@ -12,7 +12,8 @@ // /// The boolean type. /// -/// The `bool` represents a value, which could only be either `true` or `false`. +/// The `bool` represents a value, which could only be either `true` or `false`. If you cast +/// a `bool` into an integer, `true` will be 1 and `false` will be 0. /// /// # Basic usage /// @@ -56,6 +57,13 @@ /// /// Also, since `bool` implements the [`Copy`](marker/trait.Copy.html) trait, we don't /// have to worry about the move semantics (just like the integer and float primitives). +/// +/// Now an example of `bool` cast to integer type: +/// +/// ``` +/// assert_eq!(true as i32, 1); +/// assert_eq!(false as i32, 0); +/// ``` #[stable(feature = "rust1", since = "1.0.0")] mod prim_bool { } |