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Add unit type info and update associated link

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Fixes #25244
This commit is contained in:
joliv 2015-06-15 23:04:55 -04:00
parent 906ad72462
commit b87056fa31
1 changed files with 5 additions and 2 deletions
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7
src/doc/reference.md
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@ -638,7 +638,7 @@ apply to the crate as a whole.
```
A crate that contains a `main` function can be compiled to an executable. If a
`main` function is present, its return type must be [`unit`](#primitive-types)
`main` function is present, its return type must be [`unit`](#tuple-types)
and it must take no arguments.
# Items and attributes
@ -2874,7 +2874,7 @@ The `+`, `-`, `*`, `/`, `%`, `&`, `|`, `^`, `<<`, and `>>` operators may be
composed with the `=` operator. The expression `lval OP= val` is equivalent to
`lval = lval OP val`. For example, `x = x + 1` may be written as `x += 1`.
Any such expression always has the [`unit`](#primitive-types) type.
Any such expression always has the [`unit`](#tuple-types) type.
#### Operator precedence
@ -3316,6 +3316,9 @@ assert!(b != "world");
assert!(p.0 == 10);
```
For historical reasons and convenience, the tuple type with no elements (`()`)
is often called ‘unit’ or ‘the unit type’.
### Array, and Slice types
Rust has two different types for a list of items: