mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-10 08:16:15 +02:00
Merge pull request #10755 from fricklerhandwerk/comments-examples
add examples of comments
This commit is contained in:
commit
b462a92b15
1 changed files with 54 additions and 5 deletions
|
@ -414,12 +414,62 @@ Does evaluate to `"inner"`.
|
|||
|
||||
## Comments
|
||||
|
||||
Comments can be single-line, started with a `#` character, or
|
||||
inline/multi-line, enclosed within `/* ... */`.
|
||||
- Inline comments start with `#` and run until the end of the line.
|
||||
|
||||
`#` comments last until the end of the line.
|
||||
> **Example**
|
||||
>
|
||||
> ```nix
|
||||
> # A number
|
||||
> 2 # Equals 1 + 1
|
||||
> ```
|
||||
>
|
||||
> ```console
|
||||
> 2
|
||||
> ```
|
||||
|
||||
`/*` comments run until the next occurrence of `*/`; this cannot be escaped.
|
||||
- Block comments start with `/*` and run until the next occurrence of `*/`.
|
||||
|
||||
> **Example**
|
||||
>
|
||||
> ```nix
|
||||
> /*
|
||||
> Block comments
|
||||
> can span multiple lines.
|
||||
> */ "hello"
|
||||
> ```
|
||||
>
|
||||
> ```console
|
||||
> "hello"
|
||||
> ```
|
||||
|
||||
This means that block comments cannot be nested.
|
||||
|
||||
> **Example**
|
||||
>
|
||||
> ```nix
|
||||
> /* /* nope */ */ 1
|
||||
> ```
|
||||
>
|
||||
> ```console
|
||||
> error: syntax error, unexpected '*'
|
||||
>
|
||||
> at «string»:1:15:
|
||||
>
|
||||
> 1| /* /* nope */ *
|
||||
> | ^
|
||||
> ```
|
||||
|
||||
Consider escaping nested comments and unescaping them in post-processing.
|
||||
|
||||
> **Example**
|
||||
>
|
||||
> ```nix
|
||||
> /* /* nested *\/ */ 1
|
||||
> ```
|
||||
>
|
||||
> ```console
|
||||
> 1
|
||||
> ```
|
||||
|
||||
## Scoping rules
|
||||
|
||||
|
@ -432,6 +482,5 @@ Nix is [statically scoped](https://en.wikipedia.org/wiki/Scope_(computer_science
|
|||
|
||||
* secondary scope --- implicitly-bound variables
|
||||
* [`with`](#with-expressions)
|
||||
|
||||
Primary scope takes precedence over secondary scope.
|
||||
See [`with`](#with-expressions) for a detailed example.
|
||||
|
|
Loading…
Reference in a new issue