Initializes an empty (null) function. Attempting to call an empty function will abort the program.

Creates a function with an empty target (same outcome as the default constructor).

Creates a function bound to the specified function pointer. If target == nullptr, assigns an empty target.

Creates a function bound to the specified callable object. If target == nullptr, assigns an empty target.

For functors, we need to capture the raw type but also restrict on the existence of an appropriate operator () to resolve overloads and implicit casts properly.

Note that specializations of this template method that take fit::callback objects as the target Callable are deleted (see below).

Deletes the specializations of function_impl(Callable) that would allow a |fit::function| to be constructed from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before passing it to the |fit::function|.

Creates a function with a target moved from another function, leaving the other function with an empty target.

Destroys the function, releasing its target.

Assigns the function to an empty target. Attempting to invoke the function will abort the program.

NOLINTNEXTLINE(misc-unconventional-assign-operator)

Deletes the specializations of operator=(Callable) that would allow a |fit::function| to be assigned from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before assigning it to the |fit::function|.

Move assignment

Swaps the functions' targets.

Invokes the function's target. Aborts if the function's target is empty.

Returns a new function object that invokes the same target. The target itself is not copied; it is moved to the heap and its lifetime is extended until all references have been released.

Note: This method is not supported on |fit::inline_function<>| because it may incur a heap allocation which is contrary to the stated purpose of |fit::inline_function<>|.

Initializes an empty (null) function. Attempting to call an empty function will abort the program.

Creates a function with an empty target (same outcome as the default constructor).

Creates a function bound to the specified function pointer. If target == nullptr, assigns an empty target.

Creates a function bound to the specified callable object. If target == nullptr, assigns an empty target.

For functors, we need to capture the raw type but also restrict on the existence of an appropriate operator () to resolve overloads and implicit casts properly.

Note that specializations of this template method that take fit::callback objects as the target Callable are deleted (see below).

Deletes the specializations of function_impl(Callable) that would allow a |fit::function| to be constructed from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before passing it to the |fit::function|.

Creates a function with a target moved from another function, leaving the other function with an empty target.

Destroys the function, releasing its target.

Assigns the function to an empty target. Attempting to invoke the function will abort the program.

NOLINTNEXTLINE(misc-unconventional-assign-operator)

Deletes the specializations of operator=(Callable) that would allow a |fit::function| to be assigned from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before assigning it to the |fit::function|.

Move assignment

Swaps the functions' targets.

Invokes the function's target. Aborts if the function's target is empty.

Returns a new function object that invokes the same target. The target itself is not copied; it is moved to the heap and its lifetime is extended until all references have been released.

Note: This method is not supported on |fit::inline_function<>| because it may incur a heap allocation which is contrary to the stated purpose of |fit::inline_function<>|.

Initializes an empty (null) function. Attempting to call an empty function will abort the program.

Creates a function with an empty target (same outcome as the default constructor).

Creates a function bound to the specified function pointer. If target == nullptr, assigns an empty target.

Creates a function bound to the specified callable object. If target == nullptr, assigns an empty target.

For functors, we need to capture the raw type but also restrict on the existence of an appropriate operator () to resolve overloads and implicit casts properly.

Note that specializations of this template method that take fit::callback objects as the target Callable are deleted (see below).

Deletes the specializations of function_impl(Callable) that would allow a |fit::function| to be constructed from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before passing it to the |fit::function|.

Creates a function with a target moved from another function, leaving the other function with an empty target.

Destroys the function, releasing its target.

Assigns the function to an empty target. Attempting to invoke the function will abort the program.

NOLINTNEXTLINE(misc-unconventional-assign-operator)

Deletes the specializations of operator=(Callable) that would allow a |fit::function| to be assigned from a |fit::callback|. This prevents unexpected behavior of a |fit::function| that would otherwise fail after one call. To explicitly allow this, simply wrap the |fit::callback| in a pass-through lambda before assigning it to the |fit::function|.

Move assignment

Swaps the functions' targets.

Invokes the function's target. Aborts if the function's target is empty.

Returns a new function object that invokes the same target. The target itself is not copied; it is moved to the heap and its lifetime is extended until all references have been released.

Note: This method is not supported on |fit::inline_function<>| because it may incur a heap allocation which is contrary to the stated purpose of |fit::inline_function<>|.