1 files changed, 64 insertions, 0 deletions
diff --git a/docs/samples/include.cpp b/docs/samples/include.cpp
new file mode 100644
index 0000000..39830c5
--- /dev/null
+++ b/docs/samples/include.cpp
@@ -0,0 +1,64 @@
+#include "pugixml.hpp"
+
+#include <string.h>
+#include <iostream>
+
+// tag::code[]
+bool load_preprocess(pugi::xml_document& doc, const char* path);
+
+bool preprocess(pugi::xml_node node)
+{
+    for (pugi::xml_node child = node.first_child(); child; )
+    {
+        if (child.type() == pugi::node_pi && strcmp(child.name(), "include") == 0)
+        {
+            pugi::xml_node include = child;
+
+            // load new preprocessed document (note: ideally this should handle relative paths)
+            const char* path = include.value();
+
+            pugi::xml_document doc;
+            if (!load_preprocess(doc, path)) return false;
+
+            // insert the comment marker above include directive
+            node.insert_child_before(pugi::node_comment, include).set_value(path);
+
+            // copy the document above the include directive (this retains the original order!)
+            for (pugi::xml_node ic = doc.first_child(); ic; ic = ic.next_sibling())
+            {
+                node.insert_copy_before(ic, include);
+            }
+
+            // remove the include node and move to the next child
+            child = child.next_sibling();
+
+            node.remove_child(include);
+        }
+        else
+        {
+            if (!preprocess(child)) return false;
+
+            child = child.next_sibling();
+        }
+    }
+
+    return true;
+}
+
+bool load_preprocess(pugi::xml_document& doc, const char* path)
+{
+    pugi::xml_parse_result result = doc.load_file(path, pugi::parse_default | pugi::parse_pi); // for <?include?>
+    
+    return result ? preprocess(doc) : false;
+}
+// end::code[]
+
+int main()
+{
+    pugi::xml_document doc;
+    if (!load_preprocess(doc, "character.xml")) return -1;
+
+    doc.print(std::cout);
+}
+
+// vim:et