hi::v1::selector< T > Struct Template Reference

Detailed Description

template<typename T>
struct hi::v1::selector< T >

This selector allows access to member variable by name.

An application may add a specialization for selector for its own type. The specialization should add a templated function get() to give access to members based on the template parameter.

The prototype of the get() function are as follows:

• template<fixed_string> auto &get(T &) const noexcept

Here is an example how to specialize hi::selector for the my::simple type:

namespace my {
struct simple {
    int foo;
    std::string bar;
};
}
 
template<>
struct hi::selector<my::simple> {
    template<hi::fixed_string> auto &get(my::simple &) const noexcept;
 
    template<> auto &get<"foo">(my::simple &rhs) const noexcept { return rhs.foo; }
    template<> auto &get<"bar">(my::simple &rhs) const noexcept { return rhs.bar; }
};

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The documentation for this struct was generated from the following file:

• hikogui/src/hikogui/utility/type_traits.hpp