Reworked property handling to check if each property getter/setter can be generated.

Fixes a bug where we tried to generate a setter for a const field.

src/AST/Property.cs

@@ -16,6 +16,23 @@ namespace CppSharp.AST
 
         public Method SetMethod { get; set; }
 
+        public bool HasGetter
+        {
+            get
+            {
+                return (GetMethod != null) || (Field != null);
+            }
+        }
+
+        public bool HasSetter
+        {
+            get
+            {
+                return (SetMethod != null) ||
+                       (Field != null && !Field.QualifiedType.Qualifiers.IsConst);
+            }
+        }
+
         // The field that should be get and set by this property
         public Field Field { get; set; }
 

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -477,9 +477,7 @@ namespace CppSharp.Generators.CLI
                 if (prop.Ignore) continue;
 
                 GenerateDeclarationCommon(prop);
-                var isGetter = prop.GetMethod != null || prop.Field != null;
+                GenerateProperty(prop, prop.HasGetter, prop.HasSetter);
-                var isSetter = prop.SetMethod != null || prop.Field != null;
-                GenerateProperty(prop, isGetter, isSetter);
             }
             PopIndent();
         }

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -240,13 +240,23 @@ namespace CppSharp.Generators.CLI
 
             if (property.Field != null)
             {
-                GeneratePropertyGetter(property.Field, @class, property.Name, property.Type);
+                if (property.HasGetter)
-                GeneratePropertySetter(property.Field, @class, property.Name, property.Type);
+                    GeneratePropertyGetter(property.Field, @class, property.Name,
+                        property.Type);
+
+                if (property.HasSetter)
+                    GeneratePropertySetter(property.Field, @class, property.Name,
+                        property.Type);
             }
             else
             {
-                GeneratePropertyGetter(property.GetMethod, @class, property.Name, property.Type);
+                if (property.HasGetter)
-                GeneratePropertySetter(property.SetMethod, @class, property.Name, property.Type);
+                    GeneratePropertyGetter(property.GetMethod, @class, property.Name,
+                        property.Type);
+
+                if (property.HasSetter)
+                    GeneratePropertySetter(property.SetMethod, @class, property.Name,
+                        property.Type);
             }
             PopBlock(); 
         }

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -892,15 +892,18 @@ namespace CppSharp.Generators.CSharp
 
                 if (prop.Field != null)
                 {
-                    GeneratePropertyGetter(prop.Field, @class);
+                    if (prop.HasGetter)
-                    GeneratePropertySetter(prop.Field, @class);
+                        GeneratePropertyGetter(prop.Field, @class);
+
+                    if (prop.HasSetter)
+                        GeneratePropertySetter(prop.Field, @class);
                 }
                 else
                 {
-                    if (prop.GetMethod != null)
+                    if (prop.HasGetter)
                         GeneratePropertyGetter(prop.GetMethod, @class);
 
-                    if (prop.SetMethod != null)
+                    if (prop.HasSetter)
                         GeneratePropertySetter(prop.SetMethod, @class);
                 }