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Use declaration grammar #145

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Oct 17, 2017
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Use declaration grammar #145

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15 changes: 15 additions & 0 deletions src/items/use-declarations.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,17 @@
# Use declarations

> **<sup>Syntax:<sup>**
> _UseDeclaration_ :
> &nbsp;&nbsp; &nbsp;&nbsp; `use` [_SimplePath_]&nbsp;(`as` [IDENTIFIER])<sup>?</sup> `;`
> &nbsp;&nbsp; | `use` ([_SimplePath_]<sup>?</sup> `::`)<sup>?</sup> `{` _UseDeclarationItems_ `}` `;`
> &nbsp;&nbsp; | `use` ([_SimplePath_]<sup>?</sup> `::`)<sup>?</sup> `*` `;`
>
> _UseDeclarationItems_ :
> &nbsp;&nbsp; _UseDeclarationItem_ ( `,` _UseDeclarationItem_ )<sup>*</sup> `,`<sup>?<sup>
>
> _UseDeclarationItem_ :
> &nbsp;&nbsp; ( `self` | [IDENTIFIER] ) ( `as` [IDENTIFIER] )<sup>?</sup>

A _use declaration_ creates one or more local name bindings synonymous with
some other [path]. Usually a `use` declaration is used to shorten the path
required to refer to a module item. These declarations may appear in [modules]
Expand Down Expand Up @@ -111,3 +123,6 @@ mod foo {

fn main() {}
```

[IDENTIFIER]: identifiers.html
[_SimplePath_]: paths.html