#include <muu/function_view.h>
template <typename Func>
muu::function_view class

A non-owning, type-erasing view of a callable object (functions, lambdas, etc.).

Template parameters
Func A nominal function signature for callables that will be view by instances of this class, e.g. void(int).

Public types

using func_type = Func
the nomimal function type signature of this view.

Constructors, destructors, conversion operators

function_view() defaulted constexpr noexcept
Default-constructs a 'null' function view.
function_view(const function_view&) defaulted constexpr noexcept
Copy constructor.
template <typename F>
function_view(F&& func) constexpr noexcept
Constructs a function_view by wrapping a callable.
operator bool() const explicit constexpr noexcept
Returns true if the view represents a callable (i.e. is not null).

Public functions

auto operator()(Args&& ...) const -> decltype(auto) constexpr noexcept(…)
Invokes the wrapped callable with the given arguments.
auto operator=(const function_view&) -> function_view& defaulted constexpr noexcept
Copy-assignment operator.

Function documentation

template <typename Func>
template <typename F>
muu::function_view::function_view(F&& func) constexpr noexcept

Constructs a function_view by wrapping a callable.

Template parameters
F A function, lambda or other callable type with a signature compatible with func_type.
Parameters
func The callable to view/invoke.