echomap::variant_helpers::VariantAlternative Concept Reference

Constrains a type to be one of the alternatives of a std::variant. More...

#include <VariantHelpers.hpp>

Concept definition

template<typename T, typename Variant>
concept VariantAlternative = is_variant_alternative_v<T, Variant>

Detailed Description

Constrains a type to be one of the alternatives of a std::variant.

The comparison is exact after removing cv-qualifiers and references from T. Derived types, implicitly convertible types, and constructible types do not satisfy the concept unless they are explicitly listed as alternatives.

Template Parameters

T	The type to test.
Variant	The variant type whose alternatives should be inspected.

Definition at line 67 of file VariantHelpers.hpp.