Grammar Rules

The Binding Generator C->Haskell : Implementation of Haskell Binding Modules : Grammar Rules
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## 2.13. Grammar Rules

The following grammar rules define the syntax of binding hooks:

> `

>     hook     -> `{#' inner `#}'
>     inner    -> `import' ['qualified'] ident
>     	  | `context' ctxt
>               | `type' ident
>               | `sizeof' ident
>               | `enum' idalias trans [`with' prefix] [deriving]
>               | `call' [`pure'] [`unsafe'] idalias
>     	  | `fun' [`pure'] [`unsafe'] idalias parms
>               | `get' apath
>               | `set' apath
>               | `pointer' ['*'] idalias ptrkind
>               | `class' [ident `=>'] ident ident

>     ctxt     -> [`lib' `=' string] [prefix]
>     idalias  -> ident [(`as' ident | `^')]
>     prefix   -> `prefix' `=' string
>     deriving -> `deriving' `(' ident_1 `,' ... `,' ident_n `)'
>     parms    -> [verbhs `=>'] `{' parm_1 `,' ... `,' parm_n `}' `->' parm
>     parm     -> [ident_1 [`*' | `-']] verbhs [`&'] [ident_2 [`*'] [`-']]
>     apath    -> ident
>               | `*' apath
>               | apath `.' ident
>               | apath `->' ident
>     trans    -> `{' alias_1 `,' ... `,' alias_n `}'
>     alias    -> `underscoreToCase' | `upcaseFirstLetter' | `downcaseFirstLetter'
>               | ident `as' ident
>     ptrkind  -> [`foreign' | `stable'] ['newtype' | '->' ident]

> `

Identifier `ident` follow the lexis of Haskell. They may be enclosed in single quotes to disambiguate them from C->Haskell keywords.

The Binding Generator C->Haskell : Implementation of Haskell Binding Modules : Grammar Rules
Previous: CPP Directives and Inline C Code
Next: The Haskell FFI Marshalling Library