GGUI::GGBinding class
#include <GGUI/Public/Binding.h>

GGBinding: an expression (or a lambda) plus the target it reads from.

Public static variables

static size_t InlineBytes constexpr: the most a lambda and its captures take

auto IsLambda() const -> bool: Whether it is a lambda (BindLambda).
auto IsBig() const -> bool: Whether it reads big fields (BigField).
auto IsBigValue() const -> bool: A big field's value itself, as opposed to a ratio or comparison.
auto IsCpuOnly() const -> bool: Lambdas and anything over big fields.
auto IsValid() const -> bool: Whether it computes something.
auto Target() const -> BindTarget: Whose fields it reads.
auto GetExpression() const -> const GGExpr&: What it computes; empty for a lambda or big fields.
auto Evaluate(const BindingReader& reader, bool& bValid) const -> float: Its value now. bValid is false if its target is gone or a field couldn't be read.
auto EvaluateBig(const BindingReader& reader, bool& bValid) const -> BigNumber: Only for IsBigValue.

auto operator==(const GGBinding& a, const GGBinding& b) -> bool: The same target and computation: the same binding.
auto GGBind(BindTarget target, const GGExpr& expression) -> GGBinding: A binding of expression over target's fields.
auto GGBind(BindTarget target, BigField field) -> GGBinding: A big field's value (see BigField).
auto GGBind(BindTarget target, BigRatio ratio) -> GGBinding: A ratio of two big fields, 0..1.
auto GGBind(BindTarget target, BigAtLeast comparison) -> GGBinding: 1 if one big field is at least another, else 0.
template<typename TFn> auto BindLambda(BindTarget target, TFn fn) -> GGBinding: Escape hatch: fn(reader, target, bValid) computes the value. CPU only, and evaluated every update because its dependencies are unknown.