GGUI::ComponentFn class
#include <GGUI/Public/UITypes.h>

ComponentFn: the function a component re-runs.

Stored on the component's node. Two ComponentFns are equal when they are the same function with byte-identical captures. That is how an unchanged child is skipped when its parent re-runs: a function capturing handles and plain values is skipped until something it watches changes.

A function capturing something that owns memory is stored too but can't be compared, so it re-runs whenever its parent does. To make such a component skippable, pass its data as properties: ui.Component(&Function, properties) calls Function(ui, properties) and is skipped while the properties compare equal (ComponentFn::With).

Public static variables

static size_t InlineBytes constexpr: the most a lambda stored inline takes

Public static functions

template<typename TProps> static auto With(void(*)(UI&, const TProps&) function, TProps properties) -> ComponentFn: Calls function(ui, properties) with stored properties. Equal to another built from the same function with equal properties.

Constructors, destructors, conversion operators

ComponentFn() defaulted: No function.
template<typename TFn> ComponentFn(TFn fn): fn, called with the UI it builds into.
operator bool() const explicit: Whether it has a function.

Public functions

void operator()(UI& ui) const: Build into ui.

Friends