ultralight::dom::data::ScalarPayload

Whether or not P can be an action's payload without a payload struct (ignoring const, volatile, and references). More...

#include <Ultralight/dom/data/ValueTraits.h>

Concept definition

template<typename P>
concept ScalarPayload = Bindable<P>
    && (ValueTraits<std::remove_cvref_t<P>>::kind == ValueKind::Bool
        || ValueTraits<std::remove_cvref_t<P>>::kind == ValueKind::Int64
        || ValueTraits<std::remove_cvref_t<P>>::kind == ValueKind::Double
        || ValueTraits<std::remove_cvref_t<P>>::kind == ValueKind::String)

Detailed Description

Whether or not P can be an action's payload without a payload struct (ignoring const, volatile, and references).

It can when it binds as a Bool, Int64, Double, or String value (eg, Action<double> or an enum). dom::StyleValue and Color can't be payloads.

Note

A handler for a payload of your own ValueTraits type must take a dd::Value (see ValueTraits).