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Added attributes grammar #88

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Merged
steveklabnik merged 1 commit into from
Aug 14, 2017
Merged

Added attributes grammar #88

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21 changes: 21 additions & 0 deletions src/attributes.md
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# Attributes

> **<sup>Syntax</sup>**
> _Attribute_ :
> &nbsp;&nbsp; _InnerAttribute_ | _OuterAttribute_
>
> _InnerAttribute_ :
> &nbsp;&nbsp; `#![` MetaItem `]`
>
> _OuterAttribute_ :
> &nbsp;&nbsp; `#[` MetaItem `]`
>
> _MetaItem_ :
> &nbsp;&nbsp; &nbsp;&nbsp; IDENTIFIER
> &nbsp;&nbsp; | IDENTIFIER `=` LITERAL
> &nbsp;&nbsp; | IDENTIFIER `(` _MetaSeq_ `)`
> &nbsp;&nbsp; | IDENTIFIER `(` _MetaSeq_ `,` `)`
>
> _MetaSeq_ :
> &nbsp;&nbsp; &nbsp;&nbsp; EMPTY
> &nbsp;&nbsp; | _MetaItem_
> &nbsp;&nbsp; | _MetaSeq_ `,` _MetaItem_
Any item declaration may have an _attribute_ applied to it. Attributes in Rust
are modeled on Attributes in ECMA-335, with the syntax coming from ECMA-334
(C#). An attribute is a general, free-form metadatum that is interpreted
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