Math: debug operator for Bezier.

src/Magnum/Math/Bezier.h

@@ -198,6 +198,30 @@ and @ref Bezier for more information.
 template<class T> using CubicBezier3D = CubicBezier<3, T>;
 #endif
 
+/** @debugoperator{Magnum::Math::Bezier} */
+template<UnsignedInt order, UnsignedInt dimensions, class T> Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug& debug, const Bezier<order, dimensions, T>& value) {
+    debug << "Bezier(" << Corrade::Utility::Debug::nospace;
+    for(UnsignedInt o = 0; o != order + 1; ++o) {
+        debug << (o ? ", {" : "{") << Corrade::Utility::Debug::nospace << value[o][0] << Corrade::Utility::Debug::nospace;
+        for(UnsignedInt i = 1; i != dimensions; ++i)
+            debug << "," << value[o][i] << Corrade::Utility::Debug::nospace;
+        debug << "}" << Corrade::Utility::Debug::nospace;
+    }
+    return debug << ")";
+}
+
+/* Explicit instantiation for types used in OpenGL */
+#ifndef DOXYGEN_GENERATING_OUTPUT
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 2, Float>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 3, Float>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 2, Float>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 3, Float>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 2, Double>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 3, Double>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 2, Double>&);
+extern template MAGNUM_EXPORT Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 3, Double>&);
+#endif
+
 }}
 
 #endif

src/Magnum/Math/Test/BezierTest.cpp

@@ -24,6 +24,7 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+#include <sstream>
 #include <Corrade/TestSuite/Tester.h>
 
 #include "Magnum/Math/Bezier.h"
@@ -43,13 +44,17 @@ struct BezierTest : Corrade::TestSuite::Tester {
 
     void lerpQuadratic();
     void lerpCubic();
+
+    void debug();
 };
 
 BezierTest::BezierTest() {
     addTests({&BezierTest::implicitConstructor,
 
               &BezierTest::lerpQuadratic,
-              &BezierTest::lerpCubic});
+              &BezierTest::lerpCubic,
+
+              &BezierTest::debug});
 }
 
 void BezierTest::implicitConstructor() {
@@ -80,6 +85,12 @@ void BezierTest::lerpCubic() {
     }
 }
 
+void BezierTest::debug() {
+    std::ostringstream out;
+    Debug(&out) << CubicBezier2D{Vector2{0.0f, 1.0f}, Vector2{1.5f, -0.3f}, Vector2{2.1f, 0.5f}, Vector2{0.0f, 2.0f}};
+    CORRADE_COMPARE(out.str(), "Bezier({0, 1}, {1.5, -0.3}, {2.1, 0.5}, {0, 2})\n");
+}
+
 }}}
 
 CORRADE_TEST_MAIN(Magnum::Math::Test::BezierTest)

src/Magnum/Math/instantiation.cpp

@@ -23,6 +23,7 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+#include "Magnum/Math/Bezier.h"
 #include "Magnum/Math/DualComplex.h"
 #include "Magnum/Math/DualQuaternion.h"
 #include "Magnum/Math/Range.h"
@@ -76,6 +77,15 @@ template struct ConfigurationValue<Magnum::Math::Range<3, Magnum::Double>>;
 namespace Magnum { namespace Math {
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 2, Float>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 3, Float>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 2, Float>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 3, Float>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 2, Double>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<2, 3, Double>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 2, Double>&);
+template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Bezier<3, 3, Double>&);
+
 template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Complex<Float>&);
 template Corrade::Utility::Debug& operator<<(Corrade::Utility::Debug&, const Complex<Double>&);