`std::void_t ` is most commonly used to:

Cast any type to void for its side effects, discarding the expression's value in a template context.

Remove cv-qualifiers (const and volatile) from a type, yielding the underlying unqualified type.

Guard against redefinition of templates across translation units by giving each an internal linkage name.

Detect validity of an expression (e.g. whether a member type or operation exists) via a SFINAE partial specialization.

Multiple ChoiceIntermediate 45s

void_t detection idiom

`std::void_t<Ts...>` is most commonly used to:

Options

1Cast any type to void for its side effects, discarding the expression's value in a template context.
2Remove cv-qualifiers (const and volatile) from a type, yielding the underlying unqualified type.
3Guard against redefinition of templates across translation units by giving each an internal linkage name.
4Detect validity of an expression (e.g. whether a member type or operation exists) via a SFINAE partial specialization.

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