libstdc++-v3/testsuite/26_numerics/midpoint/version.cc


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// { dg-do preprocess { target c++20 } }
// { dg-require-effective-target hosted }
// { dg-add-options no_pch }

#include <version>

#ifndef __cpp_lib_interpolate
# error "Feature-test macro for midpoint and lerp missing in <version>"
#elif __cpp_lib_interpolate != 201902L
# error "Feature-test macro for midpoint and lerp has wrong value in <version>"
#endif