Adding a combined version define in MaterialX C++

Signed-off-by: Rui Yang <[email protected]>

source/MaterialXCore/Library.h

@@ -6,6 +6,11 @@
 #ifndef MATERIALX_LIBRARY_H
 #define MATERIALX_LIBRARY_H
 
+#define MATERIALX_GENERATE_INDEX(major, minor, build) \
+    ((((uint32_t)(major)) << 22U) | (((uint32_t)(minor)) << 12U) | ((uint32_t)(build)))
+#define MATERIALX_VERSION_INDEX \
+    MATERIALX_GENERATE_INDEX(MATERIALX_MAJOR_VERSION, MATERIALX_MINOR_VERSION, MATERIALX_BUILD_VERSION)
+
 /// @file
 /// Library-wide includes and types.  This file should be the first include for
 /// any public header in the MaterialX library.

source/MaterialXTest/MaterialXCore/Library.cpp

@@ -0,0 +1,16 @@
+//
+// Copyright Contributors to the MaterialX Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include <MaterialXTest/External/Catch/catch.hpp>
+
+#include <MaterialXCore/Library.h>
+
+namespace mx = MaterialX;
+
+TEST_CASE("Version comparison", "[library]")
+{
+    // Test for version comparison
+    REQUIRE(MATERIALX_VERSION_INDEX > MATERIALX_GENERATE_INDEX(1, 38, 8));
+}