Bring back multiple schema includes in IfcParseExamples.cpp

src/examples/IfcParseExamples.cpp

@@ -25,8 +25,6 @@
 
 #include "ifcparse/IfcFile.h"
 #include "ifcparse/IfcLogger.h"
-#include INCLUDE_SCHEMA(ifcparse, IfcSchema)
-#include INCLUDE_SCHEMA_DEFINITIONS(ifcparse, IfcSchema)
 
 #include <boost/preprocessor/stringize.hpp>
 #include <boost/preprocessor/seq/for_each.hpp>
@@ -43,6 +41,30 @@
 static_assert(false, "A boost preprocessor sequence of schema identifiers is needed for this file to compile.");
 #endif
 
+// A macro cannot expand to an include directive, so unroll enough includes for
+// the maximum number of schemas supported by the build configuration.
+#define INCLUDE_SCHEMA_N(n) \
+	BOOST_PP_IIF(BOOST_PP_GREATER(BOOST_PP_SEQ_SIZE(SCHEMA_SEQ), n), \
+		BOOST_PP_STRINGIZE(ifcparse/BOOST_PP_CAT(Ifc, BOOST_PP_SEQ_ELEM(BOOST_PP_MIN(n, BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_POP_BACK(SCHEMA_SEQ))), SCHEMA_SEQ)).h), \
+		"ifcgeom/empty.h")
+
+#include INCLUDE_SCHEMA_N(0)
+#include INCLUDE_SCHEMA_N(1)
+#include INCLUDE_SCHEMA_N(2)
+#include INCLUDE_SCHEMA_N(3)
+#include INCLUDE_SCHEMA_N(4)
+#include INCLUDE_SCHEMA_N(5)
+#include INCLUDE_SCHEMA_N(6)
+#include INCLUDE_SCHEMA_N(7)
+#include INCLUDE_SCHEMA_N(8)
+#include INCLUDE_SCHEMA_N(9)
+#include INCLUDE_SCHEMA_N(10)
+#include INCLUDE_SCHEMA_N(11)
+#include INCLUDE_SCHEMA_N(12)
+#include INCLUDE_SCHEMA_N(13)
+#include INCLUDE_SCHEMA_N(14)
+#include INCLUDE_SCHEMA_N(15)
+
 #include <iomanip>
 
 #if USE_VLD