refactored parameterization support

diff --git a/tests/106-param-constr-OK.asn1 b/tests/106-param-constr-OK.asn1
new file mode 100644
index 0000000..196b3d7
--- /dev/null
+++ b/tests/106-param-constr-OK.asn1
@@ -0,0 +1,20 @@
+
+-- OK: Everything is fine
+
+-- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
+-- .spelio.software.asn1c.test (9363.1.5.1)
+-- .106
+
+ModuleParametrizationWithConstraints
+	{ iso org(3) dod(6) internet (1) private(4) enterprise(1)
+		spelio(9363) software(1) asn1c(5) test(1) 106 }
+	DEFINITIONS ::=
+BEGIN
+
+	Narrow {Type} ::= SEQUENCE {
+		narrower	Type (2..5)
+	}
+
+	NarrowInteger ::= Narrow {INTEGER (0..10)}
+
+END