--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nabble/naml/compiler/TemplatePrintWriter.java	Thu Mar 21 19:15:52 2019 -0600
@@ -0,0 +1,38 @@
+package nabble.naml.compiler;
+
+import java.io.Writer;
+
+
+public class TemplatePrintWriter extends PrintWriter {
+
+	public static final TemplatePrintWriter NULL = new TemplatePrintWriter( new Writer() {
+		public void write(char[] cbuf,int off,int len) {}
+		public void flush() {}
+		public void close() {}
+	} );
+
+	public TemplatePrintWriter(Writer out) {
+		super(out);
+	}
+
+	public void print(Object obj) {
+		if( obj == null )
+			throw new NamlNullPointerException("null written to stream");
+		if( obj instanceof BlockWrapper ) {
+			((BlockWrapper)obj).printTo(this);
+		} else {
+			super.print(obj);
+		}
+	}
+
+	public void print(String s) {
+		if( s == null )
+			throw new NamlNullPointerException("null written to stream");
+		super.print(s);
+	}
+
+	public void print(Boolean b) {
+		throw new RuntimeException("no Booleans allowed, use boolean instead");
+	}
+
+}