LibCpp: Parse inheritance

Userland/Libraries/LibCpp/Tests/parser/class.ast

@@ -1,6 +1,7 @@
 TranslationUnit[0:0->10:1]
   StructOrClassDeclaration[0:6->10:1]
   A
+
     C'tor
       (
       Parameter[1:6->1:10]

Userland/Libraries/LibCpp/Tests/parser/inheritance.ast

@@ -0,0 +1,14 @@
+TranslationUnit[0:0->3:1]
+  StructOrClassDeclaration[0:6->3:1]
+  A
+    :
+    Name[0:17->0:32]
+    SomeNamespace::B
+    ,
+    Name[0:43->0:43]
+    C
+
+    VariableDeclaration[2:4->3:0]
+      NamedType[2:4->2:6]
+        int
+      x

Userland/Libraries/LibCpp/Tests/parser/inheritance.cpp

@@ -0,0 +1,4 @@
+class A : public SomeNamespace::B, private C
+{
+    int x;
+};

Userland/Libraries/LibCpp/Tests/parser/out-of-line.ast

@@ -1,6 +1,7 @@
 TranslationUnit[2:0->9:0]
   StructOrClassDeclaration[2:6->7:0]
   A
+
     FunctionDeclaration[4:4->4:14]
       NamedType[4:4->4:7]
         bool

Userland/Libraries/LibCpp/Tests/parser/struct.ast

@@ -1,6 +1,7 @@
 TranslationUnit[1:0->12:0]
   StructOrClassDeclaration[1:7->7:0]
   MyStruct
+
     VariableDeclaration[3:4->4:4]
       NamedType[3:4->3:6]
         int