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30 lines
782 B
30 lines
782 B
2 years ago
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#include "drake/common/is_less_than_comparable.h"
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#include <gtest/gtest.h>
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namespace drake {
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namespace {
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// Dummy operator< for checking is_less_than_comparable().
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struct Z {};
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bool operator<(const Z&, const Z&) { return true; }
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// Verifies that this class is comparable using the less than operator.
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GTEST_TEST(LessThanComparable, RunTime) {
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// Necessary to work around a Clang error.
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const Z z;
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operator<(z, z);
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struct X {};
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struct Y {
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bool operator<(const Y&) const { return true; }
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};
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EXPECT_TRUE(drake::is_less_than_comparable<int>::value);
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EXPECT_TRUE(drake::is_less_than_comparable<Y>::value);
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EXPECT_FALSE(drake::is_less_than_comparable<X>::value);
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EXPECT_TRUE(drake::is_less_than_comparable<Z>::value);
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}
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} // namespace
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} // namespace drake
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