2 // modifiers.cs: Modifiers handling
4 // Authors: Miguel de Icaza (miguel@gnu.org)
5 // Marek Safar (marek.safar@gmail.com)
7 // Dual licensed under the terms of the MIT X11 or GNU GPL
9 // Copyright 2001, 2002, 2003 Ximian, Inc (http://www.ximian.com)
10 // Copyright 2004-2010 Novell, Inc
16 using IKVM.Reflection;
18 using System.Reflection;
43 // Compiler specific flags
45 PROPERTY_CUSTOM = 0x4000,
49 DEFAULT_ACCESS_MODIFER = 0x40000,
50 METHOD_EXTENSION = 0x80000,
51 COMPILER_GENERATED = 0x100000,
52 BACKING_FIELD = 0x200000,
53 DEBUGGER_HIDDEN = 0x400000,
55 AccessibilityMask = PUBLIC | PROTECTED | INTERNAL | PRIVATE,
56 AllowedExplicitImplFlags = UNSAFE | EXTERN,
59 static class ModifiersExtensions
61 public static string AccessibilityName (Modifiers mod)
63 switch (mod & Modifiers.AccessibilityMask) {
64 case Modifiers.PUBLIC:
66 case Modifiers.PROTECTED:
68 case Modifiers.PROTECTED | Modifiers.INTERNAL:
69 return "protected internal";
70 case Modifiers.INTERNAL:
72 case Modifiers.PRIVATE:
75 throw new NotImplementedException (mod.ToString ());
79 static public string Name (Modifiers i)
86 case Modifiers.PUBLIC:
88 case Modifiers.PROTECTED:
89 s = "protected"; break;
90 case Modifiers.INTERNAL:
91 s = "internal"; break;
92 case Modifiers.PRIVATE:
94 case Modifiers.ABSTRACT:
95 s = "abstract"; break;
96 case Modifiers.SEALED:
98 case Modifiers.STATIC:
100 case Modifiers.READONLY:
101 s = "readonly"; break;
102 case Modifiers.VIRTUAL:
103 s = "virtual"; break;
104 case Modifiers.OVERRIDE:
105 s = "override"; break;
106 case Modifiers.EXTERN:
108 case Modifiers.VOLATILE:
109 s = "volatile"; break;
110 case Modifiers.UNSAFE:
118 // Used by custom property accessors to check whether @modA is more restrictive than @modB
120 public static bool IsRestrictedModifier (Modifiers modA, Modifiers modB)
124 if ((modB & Modifiers.PUBLIC) != 0) {
125 flags = Modifiers.PROTECTED | Modifiers.INTERNAL | Modifiers.PRIVATE;
126 } else if ((modB & Modifiers.PROTECTED) != 0) {
127 if ((modB & Modifiers.INTERNAL) != 0)
128 flags = Modifiers.PROTECTED | Modifiers.INTERNAL;
130 flags |= Modifiers.PRIVATE;
131 } else if ((modB & Modifiers.INTERNAL) != 0)
132 flags = Modifiers.PRIVATE;
134 return modB != modA && (modA & (~flags)) == 0;
137 public static TypeAttributes TypeAttr (Modifiers mod_flags, bool is_toplevel)
139 TypeAttributes t = 0;
142 if ((mod_flags & Modifiers.PUBLIC) != 0)
143 t = TypeAttributes.Public;
144 else if ((mod_flags & Modifiers.PRIVATE) != 0)
145 t = TypeAttributes.NotPublic;
147 if ((mod_flags & Modifiers.PUBLIC) != 0)
148 t = TypeAttributes.NestedPublic;
149 else if ((mod_flags & Modifiers.PRIVATE) != 0)
150 t = TypeAttributes.NestedPrivate;
151 else if ((mod_flags & (Modifiers.PROTECTED | Modifiers.INTERNAL)) == (Modifiers.PROTECTED | Modifiers.INTERNAL))
152 t = TypeAttributes.NestedFamORAssem;
153 else if ((mod_flags & Modifiers.PROTECTED) != 0)
154 t = TypeAttributes.NestedFamily;
155 else if ((mod_flags & Modifiers.INTERNAL) != 0)
156 t = TypeAttributes.NestedAssembly;
159 if ((mod_flags & Modifiers.SEALED) != 0)
160 t |= TypeAttributes.Sealed;
161 if ((mod_flags & Modifiers.ABSTRACT) != 0)
162 t |= TypeAttributes.Abstract;
167 public static FieldAttributes FieldAttr (Modifiers mod_flags)
169 FieldAttributes fa = 0;
171 if ((mod_flags & Modifiers.PUBLIC) != 0)
172 fa |= FieldAttributes.Public;
173 if ((mod_flags & Modifiers.PRIVATE) != 0)
174 fa |= FieldAttributes.Private;
175 if ((mod_flags & Modifiers.PROTECTED) != 0) {
176 if ((mod_flags & Modifiers.INTERNAL) != 0)
177 fa |= FieldAttributes.FamORAssem;
179 fa |= FieldAttributes.Family;
181 if ((mod_flags & Modifiers.INTERNAL) != 0)
182 fa |= FieldAttributes.Assembly;
185 if ((mod_flags & Modifiers.STATIC) != 0)
186 fa |= FieldAttributes.Static;
187 if ((mod_flags & Modifiers.READONLY) != 0)
188 fa |= FieldAttributes.InitOnly;
193 public static MethodAttributes MethodAttr (Modifiers mod_flags)
195 MethodAttributes ma = MethodAttributes.HideBySig;
197 switch (mod_flags & Modifiers.AccessibilityMask) {
198 case Modifiers.PUBLIC:
199 ma |= MethodAttributes.Public;
201 case Modifiers.PRIVATE:
202 ma |= MethodAttributes.Private;
204 case Modifiers.PROTECTED | Modifiers.INTERNAL:
205 ma |= MethodAttributes.FamORAssem;
207 case Modifiers.PROTECTED:
208 ma |= MethodAttributes.Family;
210 case Modifiers.INTERNAL:
211 ma |= MethodAttributes.Assembly;
214 throw new NotImplementedException (mod_flags.ToString ());
217 if ((mod_flags & Modifiers.STATIC) != 0)
218 ma |= MethodAttributes.Static;
219 if ((mod_flags & Modifiers.ABSTRACT) != 0) {
220 ma |= MethodAttributes.Abstract | MethodAttributes.Virtual;
222 if ((mod_flags & Modifiers.SEALED) != 0)
223 ma |= MethodAttributes.Final;
225 if ((mod_flags & Modifiers.VIRTUAL) != 0)
226 ma |= MethodAttributes.Virtual;
228 if ((mod_flags & Modifiers.OVERRIDE) != 0) {
229 ma |= MethodAttributes.Virtual;
231 if ((ma & MethodAttributes.Virtual) != 0)
232 ma |= MethodAttributes.NewSlot;
239 // Checks the object @mod modifiers to be in @allowed.
240 // Returns the new mask. Side effect: reports any
241 // incorrect attributes.
243 public static Modifiers Check (Modifiers allowed, Modifiers mod, Modifiers def_access, Location l, Report Report)
245 int invalid_flags = (~(int) allowed) & ((int) mod & ((int) Modifiers.TOP - 1));
248 if (invalid_flags == 0){
250 // If no accessibility bits provided
251 // then provide the defaults.
253 if ((mod & Modifiers.AccessibilityMask) == 0) {
256 mod |= Modifiers.DEFAULT_ACCESS_MODIFER;
263 for (i = 1; i <= (int) Modifiers.TOP; i <<= 1) {
264 if ((i & invalid_flags) == 0)
267 Error_InvalidModifier ((Modifiers)i, l, Report);
270 return allowed & mod;
273 static void Error_InvalidModifier (Modifiers mod, Location l, Report Report)
275 Report.Error (106, l, "The modifier `{0}' is not valid for this item",