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Diffstat (limited to 'src/libstd/unit.rs')
| -rw-r--r-- | src/libstd/unit.rs | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/src/libstd/unit.rs b/src/libstd/unit.rs deleted file mode 100644 index 2c3ddcd9d49..00000000000 --- a/src/libstd/unit.rs +++ /dev/null @@ -1,45 +0,0 @@ -// Copyright 2014 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -#![doc(primitive = "unit")] -#![stable(feature = "rust1", since = "1.0.0")] - -//! The `()` type, sometimes called "unit" or "nil". -//! -//! The `()` type has exactly one value `()`, and is used when there -//! is no other meaningful value that could be returned. `()` is most -//! commonly seen implicitly: functions without a `-> ...` implicitly -//! have return type `()`, that is, these are equivalent: -//! -//! ```rust -//! fn long() -> () {} -//! -//! fn short() {} -//! ``` -//! -//! The semicolon `;` can be used to discard the result of an -//! expression at the end of a block, making the expression (and thus -//! the block) evaluate to `()`. For example, -//! -//! ```rust -//! fn returns_i64() -> i64 { -//! 1i64 -//! } -//! fn returns_unit() { -//! 1i64; -//! } -//! -//! let is_i64 = { -//! returns_i64() -//! }; -//! let is_unit = { -//! returns_i64(); -//! }; -//! ``` |
