Fixed handling of enums in class diagram context filter (#275)

tests/t00041/.clang-uml

@@ -10,6 +10,8 @@ diagrams:
         - clanguml::t00041
       context:
         - clanguml::t00041::RR
+        - clanguml::t00041::Color
+        - clanguml::t00041::T::Direction
       subclasses:
         - clanguml::t00041::ns1::N
     exclude:

tests/t00041/t00041.cc

@@ -29,6 +29,10 @@ struct RR : public R {
     F *f;
     detail::G *g;
 
+    enum K { One, Two, Three };
+
+    K k;
+
     void foo(H *h) { }
 };
 
@@ -42,4 +46,15 @@ struct NN : public N { };
 struct NM : public N { };
 }
 
+enum class Color { Red, Green, Blue };
+
+struct S {
+    Color c;
+};
+
+struct T {
+    enum class Direction { Left, Right };
+    Direction d;
+};
+
 } // namespace clanguml::t00041

tests/t00041/test_case.h

@@ -40,10 +40,16 @@ TEST_CASE("t00041")
         REQUIRE(IsClass(src, "RRR"));
         REQUIRE(!IsClass(src, "detail::G"));
         REQUIRE(!IsClass(src, "H"));
+        REQUIRE(IsClass(src, "S"));
+        REQUIRE(IsClass(src, "T"));
 
         REQUIRE(IsBaseClass(src, "R", "RR"));
         REQUIRE(IsBaseClass(src, "RR", "RRR"));
 
+        REQUIRE(IsEnum(src, "RR::K"));
+        REQUIRE(IsEnum(src, "Color"));
+        REQUIRE(IsEnum(src, "T::Direction"));
+
         REQUIRE(IsAssociation<Public>(src, "D", "RR", "rr"));
         REQUIRE(IsAssociation<Public>(src, "RR", "E", "e"));
         REQUIRE(IsAssociation<Public>(src, "RR", "F", "f"));
@@ -54,5 +60,8 @@ TEST_CASE("t00041")
         REQUIRE(IsClass(src, {"ns1", "NM"}));
         REQUIRE(IsBaseClass(src, "ns1::N", "ns1::NN"));
         REQUIRE(IsBaseClass(src, "ns1::N", "ns1::NM"));
+
+        REQUIRE(IsInnerClass(src, "T", "T::Direction"));
+        REQUIRE(IsAggregation<Public>(src, "S", "Color", "c"));
     });
 }