initial commit

third_party/eigen/failtest/ternary_2.cpp

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+#include "../Eigen/Core"
+
+using namespace Eigen;
+
+int main(int argc, char **) {
+  VectorXf a(10), b(10);
+#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
+  b = argc > 1 ? 2 * a : a + a;
+#else
+  b = argc > 1 ? VectorXf(2 * a) : VectorXf(a + a);
+#endif
+}