BloombergLP::bdlb::VariantImp::apply

Apply the specified visitor to this variant by passing the value this variant currently holds to the visitor object's operator(), and return the value (of template parameter RET_TYPE) returned by the visitor. If this variant is unset, a default constructed bslmf::Nil is passed to the visitor.

Synopsis

Declared in <bdlb_variant.h>

template<
    class RET_TYPE,
    class VISITOR>
RET_TYPE
apply(VISITOR& visitor) const;