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added simple example of _fun

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svn: r17245
This commit is contained in:
John Clements 2009-12-09 00:06:13 +00:00
parent b26bdba77d
commit d18403a303
1 changed files with 9 additions and 0 deletions
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9
collects/scribblings/foreign/types.scrbl
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@ -470,6 +470,15 @@ form, only the input @scheme[type-expr]s and the output @scheme[type-expr] are
specified, and each types is a simple expression, which creates a specified, and each types is a simple expression, which creates a
straightforward function type. straightforward function type.
For instance,
@schemeblock[
(_fun _int _string -> _int)
]
specifies a function that receives an integer and a
string, and returns an integer.
In its full form, the @scheme[_fun] syntax provides an IDL-like In its full form, the @scheme[_fun] syntax provides an IDL-like
language that can be used to create a wrapper function around the language that can be used to create a wrapper function around the
primitive foreign function. These wrappers can implement complex primitive foreign function. These wrappers can implement complex