Add format_no_empty_element_tags flag

Setting this flag outputs start and end tag for every element, including empty
elements.

Fixes #118.

2 files changed, 18 insertions, 4 deletions

diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index 7b96d34..dc3e7be 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -4078,12 +4078,23 @@ PUGI__NS_BEGIN
 		{
 			if (!node->first_child)
 			{
-				if ((flags & format_raw) == 0)
-					writer.write(' ');
+				if (flags & format_no_empty_element_tags)
+				{
+					writer.write('>', '<', '/');
+					writer.write_string(name);
+					writer.write('>');
+
+					return false;
+				}
+				else
+				{
+					if ((flags & format_raw) == 0)
+						writer.write(' ');
 
-				writer.write('/', '>');
+					writer.write('/', '>');
 
-				return false;
+					return false;
+				}
 			}
 			else
 			{
diff --git a/src/pugixml.hpp b/src/pugixml.hpp
index d9b9c86..6288d4b 100644
--- a/src/pugixml.hpp
+++ b/src/pugixml.hpp
@@ -229,6 +229,9 @@ namespace pugi
 	// Write every attribute on a new line with appropriate indentation. This flag is off by default.
 	const unsigned int format_indent_attributes = 0x40;
 
+	// Don't output empty element tags, instead writing an explicit start and end tag even if there are no children. This flag is off by default.
+	const unsigned int format_no_empty_element_tags = 0x80;
+
 	// The default set of formatting flags.
 	// Nodes are indented depending on their depth in DOM tree, a default declaration is output if document has none.
 	const unsigned int format_default = format_indent;