CWG2927 Unclear status of translation unit with module keyword

Author: burblebee

source/preprocessor.tex

@@ -216,6 +216,16 @@
 \pnum
 A sequence of preprocessing tokens is only a \grammarterm{text-line}
 if it does not begin with a directive-introducing token.
+\begin{example}
+\begin{codeblock}
+using module = int;
+module i;               // not a \grammarterm{text-line} and not a \grammarterm{control-line}
+int foo() {
+  return i;
+}
+\end{codeblock}
+The example is not a valid \grammarterm{preprocessing-file}.
+\end{example}
 A sequence of preprocessing tokens is only a \grammarterm{conditionally-supported-directive}
 if it does not begin with any of the directive names
 appearing after a \tcode{\#} in the syntax.