Improve error message when an unknown SWIG directive is used

This previously gave the cryptic "Error: Syntax error in input(1).", but
now gives "Error: Unknown directive '%foo'."

2 files changed, 8 insertions, 0 deletions

diff --git a/Examples/test-suite/errors/pp_unknowndirective.i b/Examples/test-suite/errors/pp_unknowndirective.i
new file mode 100644
index 000000000..659a997d3
--- /dev/null
+++ b/Examples/test-suite/errors/pp_unknowndirective.i
@@ -0,0 +1,7 @@
+%module xxx
+
+/* This used to give the rather cryptic "Syntax error in input(1)." prior to
+ * SWIG 3.0.4.  This testcase checks that the improved message is actually
+ * issued.
+ */
+%remane("typo") tyop;
diff --git a/Examples/test-suite/errors/pp_unknowndirective.stderr b/Examples/test-suite/errors/pp_unknowndirective.stderr
new file mode 100644
index 000000000..4506c5cf4
--- /dev/null
+++ b/Examples/test-suite/errors/pp_unknowndirective.stderr
@@ -0,0 +1 @@
+c_unknowndirective.i:7: Error: Unknown directive '%remane'.