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17 lines
627 B
17 lines
627 B
Index: boost_1_72_0/boost/math/tools/roots.hpp
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===================================================================
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--- boost_1_72_0.orig/boost/math/tools/roots.hpp
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+++ boost_1_72_0/boost/math/tools/roots.hpp
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@@ -884,7 +884,11 @@ inline T discriminant(T const& a, T cons
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template<class T>
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std::pair<T, T> quadratic_roots_imp(T const& a, T const& b, T const& c)
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{
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- using std::copysign;
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+ #if defined(BOOST_GNU_STDLIB) && !defined(_GLIBCXX_USE_C99_MATH_TR1)
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+ using boost::math::copysign;
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+ #else
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+ using std::copysign;
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+ #endif
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using std::sqrt;
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if constexpr (std::is_floating_point<T>::value)
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{
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