Switch between inline and constexpr for c++ version

src/sfizz/Macros.h

@@ -17,3 +17,9 @@
 #else
   #define SFIZZ_EXPORTED_API
 #endif
+
+#if __cplusplus > 201103L
+#define CONSTEXPR_OR_INLINE constexpr
+#else
+#define CONSTEXPR_OR_INLINE inline
+#endif

src/sfizz/MathHelpers.h

@@ -10,6 +10,7 @@
  */
 #pragma once
 #include "Config.h"
+#include "Macros.h"
 #include <algorithm>
 #include <cmath>
 #include <random>
@@ -128,13 +129,13 @@ constexpr T clamp( T v, T lo, T hi )
 }
 
 template<int Increment = 1, class T>
-constexpr void incrementAll(T& only)
+CONSTEXPR_OR_INLINE void incrementAll(T& only)
 {
     only += Increment;
 }
 
 template<int Increment = 1, class T, class... Args>
-constexpr void incrementAll(T& first, Args&... rest)
+CONSTEXPR_OR_INLINE void incrementAll(T& first, Args&... rest)
 {
     first += Increment;
     incrementAll<Increment>(rest...);

src/sfizz/SfzHelpers.h

@@ -10,6 +10,7 @@
 //#include <string>
 #include <array>
 #include <cmath>
+#include "Macros.h"
 #include "Config.h"
 #include "MathHelpers.h"
 
@@ -230,7 +231,7 @@ using modFunction = std::function<void(T&, U)>;
  * @param modifier the modifier value
  */
 template<class T>
-constexpr void addToBase(T& base, T modifier)
+CONSTEXPR_OR_INLINE void addToBase(T& base, T modifier)
 {
     base += modifier;
 }
@@ -241,7 +242,7 @@ constexpr void addToBase(T& base, T modifier)
  * @param base
  * @param modifier
  */
-inline void multiplyByCents(float& base, int modifier)
+CONSTEXPR_OR_INLINE void multiplyByCents(float& base, int modifier)
 {
     base *= centsFactor(modifier);
 }