| Home | Libraries | People | FAQ | More

##### invoke_procedure

###### Description

Calls a Callable Object with the arguments from a Sequence. The result of the call is ignored.

The first template parameter can be specialized explicitly to avoid copying and/or to control the const qualification of a function object.

For pointers to class members corresponding object can be specified as a reference, pointer, or smart pointer. In case of the latter, a freestanding `get_pointer` function must be defined (Boost provides this function for `std::auto_ptr` and `boost::shared_ptr`).

The target function must not be a pointer to a member object (dereferencing such a pointer without returning anything does not make sense, so it isn't implemented).

###### Synopsis

    template<
        typename Function,
        class Sequence
        >
    typename result_of::invoke_procedure<Function, Sequence>::type
    invoke_procedure(Function f, Sequence & s);

    template<
        typename Function,
        class Sequence
        >
    typename result_of::invoke_procedure<Function, Sequence const>::type
    invoke_procedure(Function f, Sequence const & s);

###### Parameters

Parameter | Requirement | Description
--- | --- | ---
`f` | Model of Callable Object | The function to call.
`s` | Model of Forward Sequence | The arguments.

###### Expression Semantics

    invoke_procedure(f,s);

Return type: `void`

Semantics: Invokes `f` with the elements in `s` as arguments.

###### Header

    #include <boost/fusion/functional/invocation/invoke_procedure.hpp>

###### Example

    vector<int,int> v(1,2);
    using namespace boost::lambda;
    invoke_procedure(_1 += _2, v);
    assert(front(v) == 3);

###### See also

- `invoke`
- `invoke_function_object`
- `result_of::invoke_procedure`
- `fused_procedure`
- `make_fused_procedure`