Skip to content

Clarify unit expressions section of reference #24738

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jun 16, 2015
Merged

Clarify unit expressions section of reference #24738

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 5 additions & 2 deletions src/doc/reference.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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

Expand Down Expand Up @@ -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:
Expand Down