Split the yaml.h file into new/old API, which we'll then copy to yaml.h at...

Split the yaml.h file into new/old API, which we'll then copy to yaml.h at build time (so the right one gets installed)

CMakeLists.txt

@@ -79,10 +79,22 @@ if(YAML_CPP_BUILD_OLD_API)
 	list(APPEND public_headers ${common_public_headers} ${old_api_public_headers})
 	list(APPEND private_headers ${common_private_headers} ${old_api_private_headers})
 	add_definitions(-DYAML_CPP_OLD_API)
+
+	ADD_CUSTOM_COMMAND(
+		OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml.h
+		COMMAND ${CMAKE_COMMAND} copy ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml-old-api.h ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml.h
+		DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml-old-api.h
+	)
 else()
 	list(APPEND sources ${common_sources} ${new_api_sources})
 	list(APPEND public_headers ${common_public_headers} ${new_api_public_headers})
 	list(APPEND private_headers ${common_private_headers} ${new_api_private_headers})
+
+	ADD_CUSTOM_COMMAND(
+		OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml.h
+		COMMAND ${CMAKE_COMMAND} copy ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml-new-api.h ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml.h
+		DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/include/yaml-cpp/yaml-new-api.h
+	)
 endif()
 
 if(YAML_CPP_BUILD_CONTRIB)

include/yaml-cpp/null.h

@@ -16,9 +16,7 @@ namespace YAML
 	inline bool operator == (const _Null&, const _Null&) { return true; }
 	inline bool operator != (const _Null&, const _Null&) { return false; }
 	
-#if YAML_CPP_OLD_API
-	YAML_CPP_API bool IsNull(const Node& node);
-#endif
+	YAML_CPP_API bool IsNull(const Node& node); // old API only
 	
 	extern YAML_CPP_API _Null Null;
 }

include/yaml-cpp/parser.h

@@ -32,9 +32,7 @@ namespace YAML
 		void Load(std::istream& in);
 		bool HandleNextDocument(EventHandler& eventHandler);
 		
-#if YAML_CPP_OLD_API
-		bool GetNextDocument(Node& document);
-#endif
+		bool GetNextDocument(Node& document); // old API only
 		
 		void PrintTokens(std::ostream& out);
 

include/yaml-cpp/yaml.h → include/yaml-cpp/yaml-new-api.h

@@ -11,14 +11,6 @@
 #include "yaml-cpp/stlemitter.h"
 #include "yaml-cpp/exceptions.h"
 
-#ifdef YAML_CPP_OLD_API
-
-#include "yaml-cpp/old-api/node.h"
-#include "yaml-cpp/old-api/stlnode.h"
-#include "yaml-cpp/old-api/iterator.h"
-
-#else
-
 #include "yaml-cpp/node/node.h"
 #include "yaml-cpp/node/impl.h"
 #include "yaml-cpp/node/convert.h"
@@ -27,6 +19,4 @@
 #include "yaml-cpp/node/parse.h"
 #include "yaml-cpp/node/emit.h"
 
-#endif // YAML_CPP_OLD_API
-
 #endif // YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/yaml-old-api.h

+#ifndef YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+
+#include "yaml-cpp/parser.h"
+#include "yaml-cpp/emitter.h"
+#include "yaml-cpp/stlemitter.h"
+#include "yaml-cpp/exceptions.h"
+
+#include "yaml-cpp/old-api/node.h"
+#include "yaml-cpp/old-api/stlnode.h"
+#include "yaml-cpp/old-api/iterator.h"
+
+#endif // YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66