Add 'noexcept' to std::lerp

* include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201). From-SVN: r272386

Add 'noexcept' to std::lerp
* include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201). From-SVN: r272386
360a758e · Jonathan Wakely · Jonathan Wakely · 26b1320e · 360a758e · 360a758e
Commit 360a758e authored Jun 17, 2019 by Jonathan Wakely Committed by Jonathan Wakely Jun 17, 2019
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libstdc++-v3/ChangeLog
+2 -0

libstdc++-v3/include/c_global/cmath
+4 -4

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--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>

+	* include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
+
 	PR libstdc++/90281 Fix string conversions for filesystem::path
 	* include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 	Use codecvt_utf8_utf16 instead of codecvt_utf8. Use

--- a/libstdc++-v3/include/c_global/cmath
+++ b/libstdc++-v3/include/c_global/cmath
@@ -1891,7 +1891,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION

  template<typename _Fp>
    constexpr _Fp
-    __lerp(_Fp __a, _Fp __b, _Fp __t)
+    __lerp(_Fp __a, _Fp __b, _Fp __t) noexcept
    {
      if (__a <= 0 && __b >= 0 || __a >= 0 && __b <= 0)
 	return __t * __b + (1 - __t) * __a;
@@ -1908,15 +1908,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
    }

  constexpr float
-  lerp(float __a, float __b, float __t)
+  lerp(float __a, float __b, float __t) noexcept
  { return std::__lerp(__a, __b, __t); }

  constexpr double
-  lerp(double __a, double __b, double __t)
+  lerp(double __a, double __b, double __t) noexcept
  { return std::__lerp(__a, __b, __t); }

  constexpr long double
-  lerp(long double __a, long double __b, long double __t)
+  lerp(long double __a, long double __b, long double __t) noexcept
  { return std::__lerp(__a, __b, __t); }
 #endif // C++20