Class template visitor_ptr_t
boost::visitor_ptr_t — Adapts a function pointer for use as a static visitor.
Synopsis
Description
Adapts the function given at construction for use as a
static visitor
of type T
with result type R
.
visitor_ptr_t
construct/copy/destruct
-
explicit visitor_ptr_t(R (*)(T));
Effects: |
Constructs the visitor with the given function. |
visitor_ptr_t
static visitor interfaces
-
R operator()(unspecified-forwarding-type operand);
template<typename U> void operator()(const U&);
Effects: |
If passed a value or reference of type
T , it invokes the function given at
construction, appropriately forwarding
operand . |
Returns: |
Returns the result of the function invocation. |
Throws: |
The overload taking a value or reference of type
T throws if the invoked function throws.
The overload taking all other values always
throws bad_visit . |