Get rid of std::numbers

Author: kunitoki

thirdparty/bungee_library/upstream/src/Grain.h

@@ -19,7 +19,6 @@
 #include <array>
 #include <complex>
 #include <memory>
-#include <numbers>
 
 namespace Bungee {
 

thirdparty/bungee_library/upstream/src/Input.cpp

@@ -6,14 +6,12 @@
 #include "Instrumentation.h"
 #include "log2.h"
 
-#include <numbers>
-
 namespace Bungee {
 
 using namespace Internal;
 
 namespace {
-static constexpr float pi = std::numbers::pi_v<float>;
+static constexpr float pi = static_cast<float>(3.141592653589793238462643383279502884L);
 static constexpr float gain = (3 * pi) / (3 * pi + 8);
 } // namespace
 

thirdparty/bungee_library/upstream/src/Stretcher.cpp

@@ -102,7 +102,7 @@ void Internal::Stretcher::synthesiseGrain(OutputChunk &outputChunk)
 
 		auto t = temporary.topRows(grain.validBinCount);
 
-		t = grain.rotation.topRows(grain.validBinCount).cast<float>() * (std::complex<float>{0, std::numbers::pi_v<float> / 0x8000});
+		t = grain.rotation.topRows(grain.validBinCount).cast<float>() * (std::complex<float>{0, static_cast<float>(3.141592653589793238462643383279502884L) / 0x8000});
 		t = t.exp();
 
 		if (grain.reverse())