mirror of https://github.com/procxx/kepka.git
37 lines
681 B
C++
37 lines
681 B
C++
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#include "catch.hpp"
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#include <mapbox/variant.hpp>
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#include <mapbox/variant_io.hpp>
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#include <string>
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template <typename T>
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struct mutating_visitor
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{
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mutating_visitor(T& val)
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: val_(val) {}
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void operator()(T& val) const
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{
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val = val_;
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}
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template <typename T1>
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void operator()(T1&) const
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{
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} // no-op
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T& val_;
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};
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TEST_CASE("variant visitation", "[visitor][unary visitor]")
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{
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mapbox::util::variant<int, double, std::string> var(123);
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REQUIRE(var.get<int>() == 123);
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int val = 456;
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const mutating_visitor<int> visitor(val);
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mapbox::util::apply_visitor(visitor, var);
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REQUIRE(var.get<int>() == 456);
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}
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