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;
44 // Compiler specific flags
46 PROPERTY_CUSTOM = 0x10000,
49 DEFAULT_ACCESS_MODIFER = 0x40000,
50 METHOD_EXTENSION = 0x80000,
51 COMPILER_GENERATED = 0x100000,
52 BACKING_FIELD = 0x200000,
53 DEBUGGER_HIDDEN = 0x400000,
54 DEBUGGER_STEP_THROUGH = 0x800000,
56 AccessibilityMask = PUBLIC | PROTECTED | INTERNAL | PRIVATE,
57 AllowedExplicitImplFlags = UNSAFE | EXTERN,
60 static class ModifiersExtensions
62 public static string AccessibilityName (Modifiers mod)
64 switch (mod & Modifiers.AccessibilityMask) {
65 case Modifiers.PUBLIC:
67 case Modifiers.PROTECTED:
69 case Modifiers.PROTECTED | Modifiers.INTERNAL:
70 return "protected internal";
71 case Modifiers.INTERNAL:
73 case Modifiers.PRIVATE:
76 throw new NotImplementedException (mod.ToString ());
80 static public string Name (Modifiers i)
87 case Modifiers.PUBLIC:
89 case Modifiers.PROTECTED:
90 s = "protected"; break;
91 case Modifiers.INTERNAL:
92 s = "internal"; break;
93 case Modifiers.PRIVATE:
95 case Modifiers.ABSTRACT:
96 s = "abstract"; break;
97 case Modifiers.SEALED:
99 case Modifiers.STATIC:
101 case Modifiers.READONLY:
102 s = "readonly"; break;
103 case Modifiers.VIRTUAL:
104 s = "virtual"; break;
105 case Modifiers.OVERRIDE:
106 s = "override"; break;
107 case Modifiers.EXTERN:
109 case Modifiers.VOLATILE:
110 s = "volatile"; break;
111 case Modifiers.UNSAFE:
113 case Modifiers.ASYNC:
121 // Used by custom property accessors to check whether @modA is more restrictive than @modB
123 public static bool IsRestrictedModifier (Modifiers modA, Modifiers modB)
127 if ((modB & Modifiers.PUBLIC) != 0) {
128 flags = Modifiers.PROTECTED | Modifiers.INTERNAL | Modifiers.PRIVATE;
129 } else if ((modB & Modifiers.PROTECTED) != 0) {
130 if ((modB & Modifiers.INTERNAL) != 0)
131 flags = Modifiers.PROTECTED | Modifiers.INTERNAL;
133 flags |= Modifiers.PRIVATE;
134 } else if ((modB & Modifiers.INTERNAL) != 0)
135 flags = Modifiers.PRIVATE;
137 return modB != modA && (modA & (~flags)) == 0;
140 public static TypeAttributes TypeAttr (Modifiers mod_flags, bool is_toplevel)
142 TypeAttributes t = 0;
145 if ((mod_flags & Modifiers.PUBLIC) != 0)
146 t = TypeAttributes.Public;
147 else if ((mod_flags & Modifiers.PRIVATE) != 0)
148 t = TypeAttributes.NotPublic;
150 if ((mod_flags & Modifiers.PUBLIC) != 0)
151 t = TypeAttributes.NestedPublic;
152 else if ((mod_flags & Modifiers.PRIVATE) != 0)
153 t = TypeAttributes.NestedPrivate;
154 else if ((mod_flags & (Modifiers.PROTECTED | Modifiers.INTERNAL)) == (Modifiers.PROTECTED | Modifiers.INTERNAL))
155 t = TypeAttributes.NestedFamORAssem;
156 else if ((mod_flags & Modifiers.PROTECTED) != 0)
157 t = TypeAttributes.NestedFamily;
158 else if ((mod_flags & Modifiers.INTERNAL) != 0)
159 t = TypeAttributes.NestedAssembly;
162 if ((mod_flags & Modifiers.SEALED) != 0)
163 t |= TypeAttributes.Sealed;
164 if ((mod_flags & Modifiers.ABSTRACT) != 0)
165 t |= TypeAttributes.Abstract;
170 public static FieldAttributes FieldAttr (Modifiers mod_flags)
172 FieldAttributes fa = 0;
174 if ((mod_flags & Modifiers.PUBLIC) != 0)
175 fa |= FieldAttributes.Public;
176 if ((mod_flags & Modifiers.PRIVATE) != 0)
177 fa |= FieldAttributes.Private;
178 if ((mod_flags & Modifiers.PROTECTED) != 0) {
179 if ((mod_flags & Modifiers.INTERNAL) != 0)
180 fa |= FieldAttributes.FamORAssem;
182 fa |= FieldAttributes.Family;
184 if ((mod_flags & Modifiers.INTERNAL) != 0)
185 fa |= FieldAttributes.Assembly;
188 if ((mod_flags & Modifiers.STATIC) != 0)
189 fa |= FieldAttributes.Static;
190 if ((mod_flags & Modifiers.READONLY) != 0)
191 fa |= FieldAttributes.InitOnly;
196 public static MethodAttributes MethodAttr (Modifiers mod_flags)
198 MethodAttributes ma = MethodAttributes.HideBySig;
200 switch (mod_flags & Modifiers.AccessibilityMask) {
201 case Modifiers.PUBLIC:
202 ma |= MethodAttributes.Public;
204 case Modifiers.PRIVATE:
205 ma |= MethodAttributes.Private;
207 case Modifiers.PROTECTED | Modifiers.INTERNAL:
208 ma |= MethodAttributes.FamORAssem;
210 case Modifiers.PROTECTED:
211 ma |= MethodAttributes.Family;
213 case Modifiers.INTERNAL:
214 ma |= MethodAttributes.Assembly;
217 throw new NotImplementedException (mod_flags.ToString ());
220 if ((mod_flags & Modifiers.STATIC) != 0)
221 ma |= MethodAttributes.Static;
222 if ((mod_flags & Modifiers.ABSTRACT) != 0) {
223 ma |= MethodAttributes.Abstract | MethodAttributes.Virtual;
225 if ((mod_flags & Modifiers.SEALED) != 0)
226 ma |= MethodAttributes.Final;
228 if ((mod_flags & Modifiers.VIRTUAL) != 0)
229 ma |= MethodAttributes.Virtual;
231 if ((mod_flags & Modifiers.OVERRIDE) != 0) {
232 ma |= MethodAttributes.Virtual;
234 if ((ma & MethodAttributes.Virtual) != 0)
235 ma |= MethodAttributes.NewSlot;
242 // Checks the object @mod modifiers to be in @allowed.
243 // Returns the new mask. Side effect: reports any
244 // incorrect attributes.
246 public static Modifiers Check (Modifiers allowed, Modifiers mod, Modifiers def_access, Location l, Report Report)
248 int invalid_flags = (~(int) allowed) & ((int) mod & ((int) Modifiers.TOP - 1));
251 if (invalid_flags == 0){
253 // If no accessibility bits provided
254 // then provide the defaults.
256 if ((mod & Modifiers.AccessibilityMask) == 0) {
259 mod |= Modifiers.DEFAULT_ACCESS_MODIFER;
266 for (i = 1; i < (int) Modifiers.TOP; i <<= 1) {
267 if ((i & invalid_flags) == 0)
270 Error_InvalidModifier ((Modifiers)i, l, Report);
273 return allowed & mod;
276 static void Error_InvalidModifier (Modifiers mod, Location l, Report Report)
278 Report.Error (106, l, "The modifier `{0}' is not valid for this item",