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#include "catch.hpp"
#include <mapbox/variant.hpp>
#include <mapbox/variant_io.hpp>
#include <string>
template <typename T>
struct mutating_visitor
{
mutating_visitor(T& val)
: val_(val) {}
void operator()(T& val) const
{
val = val_;
}
template <typename T1>
void operator()(T1&) const
{
} // no-op
T& val_;
};
TEST_CASE("variant visitation", "[visitor][unary visitor]")
{
mapbox::util::variant<int, double, std::string> var(123);
REQUIRE(var.get<int>() == 123);
int val = 456;
const mutating_visitor<int> visitor(val);
mapbox::util::apply_visitor(visitor, var);
REQUIRE(var.get<int>() == 456);
}
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