Access yaml-cpp version from within a program.

.gitignore

@@ -1 +1,2 @@
 build/
+test/version_test.cpp

include/yaml-cpp/version.h

@@ -0,0 +1,17 @@
+#ifndef YAML_CPP_VERSION_H
+#define YAML_CPP_VERSION_H
+
+#if defined(_MSC_VER) ||                                            \
+    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
+     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+#define YAML_CPP_VERSION_MAJOR 0
+#define YAML_CPP_VERSION_MINOR 5
+#define YAML_CPP_VERSION_PATCH 2
+
+// String representation of the current version (ie. "0.1.2")
+#define YAML_CPP_VERSION "0.5.2"
+
+#endif  // YAML_CPP_VERSION_H

test/CMakeLists.txt

@@ -13,6 +13,9 @@ if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR
   set(yaml_test_flags "-Wno-c99-extensions -Wno-variadic-macros -Wno-sign-compare")
 endif()
 
+# Create version_test.cpp
+configure_file(${YAML_CPP_SOURCE_DIR}/test/version_test.cpp.in ${YAML_CPP_SOURCE_DIR}/test/version_test.cpp)
+
 file(GLOB test_headers [a-z_]*.h)
 file(GLOB test_sources [a-z_]*.cpp integration/[a-z_]*.cpp node/[a-z_]*.cpp)
 file(GLOB test_new_api_sources new-api/[a-z]*.cpp)

test/version_test.cpp.in

@@ -0,0 +1,27 @@
+#include "yaml-cpp/version.h"
+
+#include "gtest/gtest.h"
+
+namespace YAML {
+namespace {
+TEST(VersionTest, Major)
+{
+  ASSERT_EQ(${YAML_CPP_VERSION_MAJOR}, YAML_CPP_VERSION_MAJOR);
+}
+
+TEST(VersionTest, Minor)
+{
+  ASSERT_EQ(${YAML_CPP_VERSION_MINOR}, YAML_CPP_VERSION_MINOR);
+}
+
+TEST(VersionTest, Path)
+{
+  ASSERT_EQ(${YAML_CPP_VERSION_PATCH}, YAML_CPP_VERSION_PATCH);
+}
+
+TEST(VersionTest, String)
+{
+  ASSERT_STREQ("${YAML_CPP_VERSION}", YAML_CPP_VERSION);
+}
+}
+}