Math: add the Bezier class and aliases to the forward declaration header.

src/Magnum/Math/Bezier.h

@@ -135,7 +135,9 @@ Convenience alternative to `Bezier<2, dimensions, T>`. See @ref Bezier for more
 information.
 @see @ref QuadraticBezier2D, @ref QuadraticBezier3D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<UnsignedInt dimensions, class T> using QuadraticBezier = Bezier<2, dimensions, T>;
+#endif
 
 /**
 @brief Two-dimensional quadratic Bézier curve
@@ -144,7 +146,9 @@ Convenience alternative to `QuadraticBezier<2, T>`. See @ref QuadraticBezier
 and @ref Bezier for more information.
 @see @ref QuadraticBezier3D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<class T> using QuadraticBezier2D = QuadraticBezier<2, T>;
+#endif
 
 /**
 @brief Three-dimensional quadratic Bézier curve
@@ -153,7 +157,9 @@ Convenience alternative to `QuadraticBezier<3, T>`. See @ref QuadraticBezier
 and @ref Bezier for more information.
 @see @ref QuadraticBezier2D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<class T> using QuadraticBezier3D = QuadraticBezier<3, T>;
+#endif
 
 /**
 @brief Cubic Bézier curve
@@ -162,7 +168,9 @@ Convenience alternative to `Bezier<3, dimensions, T>`. See @ref Bezier for more
 information.
 @see @ref CubicBezier2D, @ref CubicBezier3D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<UnsignedInt dimensions, class T> using CubicBezier = Bezier<3, dimensions, T>;
+#endif
 
 /**
 @brief Two-dimensional cubic Bézier curve
@@ -171,7 +179,9 @@ Convenience alternative to `CubicBezier<2, T>`. See @ref CubicBezier
 and @ref Bezier for more information.
 @see @ref CubicBezier3D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<class T> using CubicBezier2D = CubicBezier<2, T>;
+#endif
 
 /**
 @brief Three-dimensional cubic Bézier curve
@@ -180,7 +190,9 @@ Convenience alternative to `CubicBezier<3, T>`. See @ref CubicBezier
 and @ref Bezier for more information.
 @see @ref CubicBezier2D
 */
+#ifndef CORRADE_MSVC2015_COMPATIBILITY /* Multiple definitions still broken */
 template<class T> using CubicBezier3D = CubicBezier<3, T>;
+#endif
 
 }}
 

src/Magnum/Math/Math.h

@@ -41,6 +41,14 @@ namespace Magnum { namespace Math {
 #ifndef DOXYGEN_GENERATING_OUTPUT
 /* Class Constants used only statically */
 
+template<UnsignedInt, UnsignedInt, class> class Bezier;
+template<UnsignedInt dimensions, class T> using QuadraticBezier = Bezier<2, dimensions, T>;
+template<UnsignedInt dimensions, class T> using CubicBezier = Bezier<3, dimensions, T>;
+template<class T> using QuadraticBezier2D = QuadraticBezier<2, T>;
+template<class T> using QuadraticBezier3D = QuadraticBezier<3, T>;
+template<class T> using CubicBezier2D = CubicBezier<2, T>;
+template<class T> using CubicBezier3D = CubicBezier<3, T>;
+
 template<class> class Complex;
 template<class> class Dual;
 template<class> class DualComplex;