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SharpDevelop/ICSharpCode.NRefactory.CSharp/Parser/mcs/attribute.cs

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//
// attribute.cs: Attribute Handler
//
// Author: Ravi Pratap (ravi@ximian.com)
// Marek Safar (marek.safar@seznam.cz)
//
// Dual licensed under the terms of the MIT X11 or GNU GPL
//
// Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2003-2008 Novell, Inc.
// Copyright 2011 Xamarin Inc
//
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
using System.IO;
#if STATIC
using SecurityType = System.Collections.Generic.List<IKVM.Reflection.Emit.CustomAttributeBuilder>;
using BadImageFormat = IKVM.Reflection.BadImageFormatException;
using IKVM.Reflection;
using IKVM.Reflection.Emit;
#else
using SecurityType = System.Collections.Generic.Dictionary<System.Security.Permissions.SecurityAction, System.Security.PermissionSet>;
using BadImageFormat = System.BadImageFormatException;
using System.Reflection;
using System.Reflection.Emit;
#endif
namespace Mono.CSharp {
/// <summary>
/// Base class for objects that can have Attributes applied to them.
/// </summary>
public abstract class Attributable {
//
// Holds all attributes attached to this element
//
protected Attributes attributes;
public void AddAttributes (Attributes attrs, IMemberContext context)
{
if (attrs == null)
return;
if (attributes == null)
attributes = attrs;
else
attributes.AddAttributes (attrs.Attrs);
attrs.AttachTo (this, context);
}
public Attributes OptAttributes {
get {
return attributes;
}
set {
attributes = value;
}
}
/// <summary>
/// Use member-specific procedure to apply attribute @a in @cb to the entity being built in @builder
/// </summary>
public abstract void ApplyAttributeBuilder (Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa);
/// <summary>
/// Returns one AttributeTarget for this element.
/// </summary>
public abstract AttributeTargets AttributeTargets { get; }
public abstract bool IsClsComplianceRequired ();
/// <summary>
/// Gets list of valid attribute targets for explicit target declaration.
/// The first array item is default target. Don't break this rule.
/// </summary>
public abstract string[] ValidAttributeTargets { get; }
};
public class Attribute
{
public readonly string ExplicitTarget;
public AttributeTargets Target;
readonly ATypeNameExpression expression;
Arguments pos_args, named_args;
bool resolve_error;
bool arg_resolved;
readonly bool nameEscaped;
readonly Location loc;
public TypeSpec Type;
//
// An attribute can be attached to multiple targets (e.g. multiple fields)
//
Attributable[] targets;
//
// A member context for the attribute, it's much easier to hold it here
// than trying to pull it during resolve
//
IMemberContext context;
public static readonly AttributeUsageAttribute DefaultUsageAttribute = new AttributeUsageAttribute (AttributeTargets.All);
public static readonly object[] EmptyObject = new object [0];
List<KeyValuePair<MemberExpr, NamedArgument>> named_values;
public Attribute (string target, ATypeNameExpression expr, Arguments[] args, Location loc, bool nameEscaped)
{
this.expression = expr;
if (args != null) {
pos_args = args[0];
named_args = args[1];
}
this.loc = loc;
ExplicitTarget = target;
this.nameEscaped = nameEscaped;
}
public Location Location {
get {
return loc;
}
}
public Arguments NamedArguments {
get {
return named_args;
}
}
public Arguments PositionalArguments {
get {
return pos_args;
}
}
public bool ResolveError {
get {
return resolve_error;
}
}
public ATypeNameExpression TypeExpression {
get {
return expression;
}
}
void AddModuleCharSet (ResolveContext rc)
{
const string dll_import_char_set = "CharSet";
//
// Only when not customized by user
//
if (HasField (dll_import_char_set))
return;
if (!rc.Module.PredefinedTypes.CharSet.Define ()) {
return;
}
if (NamedArguments == null)
named_args = new Arguments (1);
var value = Constant.CreateConstant (rc.Module.PredefinedTypes.CharSet.TypeSpec, rc.Module.DefaultCharSet, Location);
NamedArguments.Add (new NamedArgument (dll_import_char_set, loc, value));
}
public Attribute Clone ()
{
Attribute a = new Attribute (ExplicitTarget, expression, null, loc, nameEscaped);
a.pos_args = pos_args;
a.named_args = NamedArguments;
return a;
}
//
// When the same attribute is attached to multiple fiels
// we use @target field as a list of targets. The attribute
// has to be resolved only once but emitted for each target.
//
public void AttachTo (Attributable target, IMemberContext context)
{
if (this.targets == null) {
this.targets = new Attributable[] { target };
this.context = context;
return;
}
// When re-attaching global attributes
if (context is NamespaceContainer) {
this.targets[0] = target;
this.context = context;
return;
}
// Resize target array
Attributable[] new_array = new Attributable [this.targets.Length + 1];
targets.CopyTo (new_array, 0);
new_array [targets.Length] = target;
this.targets = new_array;
// No need to update context, different targets cannot have
// different contexts, it's enough to remove same attributes
// from secondary members.
target.OptAttributes = null;
}
public ResolveContext CreateResolveContext ()
{
return new ResolveContext (context, ResolveContext.Options.ConstantScope);
}
static void Error_InvalidNamedArgument (ResolveContext rc, NamedArgument name)
{
rc.Report.Error (617, name.Location, "`{0}' is not a valid named attribute argument. Named attribute arguments " +
"must be fields which are not readonly, static, const or read-write properties which are " +
"public and not static",
name.Name);
}
static void Error_InvalidNamedArgumentType (ResolveContext rc, NamedArgument name)
{
rc.Report.Error (655, name.Location,
"`{0}' is not a valid named attribute argument because it is not a valid attribute parameter type",
name.Name);
}
public static void Error_AttributeArgumentIsDynamic (IMemberContext context, Location loc)
{
context.Module.Compiler.Report.Error (1982, loc, "An attribute argument cannot be dynamic expression");
}
public void Error_MissingGuidAttribute ()
{
Report.Error (596, Location, "The Guid attribute must be specified with the ComImport attribute");
}
public void Error_MisusedExtensionAttribute ()
{
Report.Error (1112, Location, "Do not use `{0}' directly. Use parameter modifier `this' instead", GetSignatureForError ());
}
public void Error_MisusedDynamicAttribute ()
{
Report.Error (1970, loc, "Do not use `{0}' directly. Use `dynamic' keyword instead", GetSignatureForError ());
}
/// <summary>
/// This is rather hack. We report many emit attribute error with same error to be compatible with
/// csc. But because csc has to report them this way because error came from ilasm we needn't.
/// </summary>
public void Error_AttributeEmitError (string inner)
{
Report.Error (647, Location, "Error during emitting `{0}' attribute. The reason is `{1}'",
TypeManager.CSharpName (Type), inner);
}
public void Error_InvalidSecurityParent ()
{
Error_AttributeEmitError ("it is attached to invalid parent");
}
Attributable Owner {
get {
return targets [0];
}
}
/// <summary>
/// Tries to resolve the type of the attribute. Flags an error if it can't, and complain is true.
/// </summary>
void ResolveAttributeType (bool comparisonOnly)
{
SessionReportPrinter resolve_printer = new SessionReportPrinter ();
ReportPrinter prev_recorder = Report.SetPrinter (resolve_printer);
bool t1_is_attr = false;
bool t2_is_attr = false;
TypeSpec t1, t2;
ATypeNameExpression expanded = null;
// TODO: Additional warnings such as CS0436 are swallowed because we don't
// print on success
try {
t1 = expression.ResolveAsType (context);
if (t1 != null)
t1_is_attr = t1.IsAttribute;
resolve_printer.EndSession ();
if (nameEscaped) {
t2 = null;
} else {
expanded = (ATypeNameExpression) expression.Clone (null);
expanded.Name += "Attribute";
t2 = expanded.ResolveAsType (context);
if (t2 != null)
t2_is_attr = t2.IsAttribute;
}
} finally {
context.Module.Compiler.Report.SetPrinter (prev_recorder);
}
if (t1_is_attr && t2_is_attr && t1 != t2) {
if (!comparisonOnly) {
Report.Error (1614, Location, "`{0}' is ambiguous between `{1}' and `{2}'. Use either `@{0}' or `{0}Attribute'",
GetSignatureForError (), expression.GetSignatureForError (), expanded.GetSignatureForError ());
resolve_error = true;
}
return;
}
if (t1_is_attr) {
Type = t1;
return;
}
if (t2_is_attr) {
Type = t2;
return;
}
if (comparisonOnly)
return;
resolve_error = true;
if (t1 != null) {
resolve_printer.Merge (prev_recorder);
Report.SymbolRelatedToPreviousError (t1);
Report.Error (616, Location, "`{0}': is not an attribute class", t1.GetSignatureForError ());
return;
}
if (t2 != null) {
Report.SymbolRelatedToPreviousError (t2);
Report.Error (616, Location, "`{0}': is not an attribute class", t2.GetSignatureForError ());
return;
}
resolve_printer.Merge (prev_recorder);
}
public TypeSpec ResolveTypeForComparison ()
{
if (Type == null && !resolve_error)
ResolveAttributeType (true);
return Type;
}
public string GetSignatureForError ()
{
if (Type != null)
return TypeManager.CSharpName (Type);
return expression.GetSignatureForError ();
}
public bool HasSecurityAttribute {
get {
PredefinedAttribute pa = context.Module.PredefinedAttributes.Security;
return pa.IsDefined && TypeSpec.IsBaseClass (Type, pa.TypeSpec, false);
}
}
public bool IsValidSecurityAttribute ()
{
return HasSecurityAttribute && IsSecurityActionValid ();
}
static bool IsValidArgumentType (TypeSpec t)
{
if (t.IsArray) {
var ac = (ArrayContainer) t;
if (ac.Rank > 1)
return false;
t = ac.Element;
}
switch (t.BuiltinType) {
case BuiltinTypeSpec.Type.Int:
case BuiltinTypeSpec.Type.UInt:
case BuiltinTypeSpec.Type.Long:
case BuiltinTypeSpec.Type.ULong:
case BuiltinTypeSpec.Type.Float:
case BuiltinTypeSpec.Type.Double:
case BuiltinTypeSpec.Type.Char:
case BuiltinTypeSpec.Type.Short:
case BuiltinTypeSpec.Type.Bool:
case BuiltinTypeSpec.Type.SByte:
case BuiltinTypeSpec.Type.Byte:
case BuiltinTypeSpec.Type.UShort:
case BuiltinTypeSpec.Type.String:
case BuiltinTypeSpec.Type.Object:
case BuiltinTypeSpec.Type.Dynamic:
case BuiltinTypeSpec.Type.Type:
return true;
}
return t.IsEnum;
}
// TODO: Don't use this ambiguous value
public string Name {
get { return expression.Name; }
}
public ATypeNameExpression TypeNameExpression {
get {
return expression;
}
}
public Report Report {
get { return context.Module.Compiler.Report; }
}
public MethodSpec Resolve ()
{
if (resolve_error)
return null;
resolve_error = true;
arg_resolved = true;
if (Type == null) {
ResolveAttributeType (false);
if (Type == null)
return null;
}
if (Type.IsAbstract) {
Report.Error (653, Location, "Cannot apply attribute class `{0}' because it is abstract", GetSignatureForError ());
return null;
}
ObsoleteAttribute obsolete_attr = Type.GetAttributeObsolete ();
if (obsolete_attr != null) {
AttributeTester.Report_ObsoleteMessage (obsolete_attr, TypeManager.CSharpName (Type), Location, Report);
}
ResolveContext rc = null;
MethodSpec ctor;
// Try if the attribute is simple and has been resolved before
if (pos_args != null || !context.Module.AttributeConstructorCache.TryGetValue (Type, out ctor)) {
rc = CreateResolveContext ();
ctor = ResolveConstructor (rc);
if (ctor == null) {
return null;
}
if (pos_args == null && ctor.Parameters.IsEmpty)
context.Module.AttributeConstructorCache.Add (Type, ctor);
}
//
// Add [module: DefaultCharSet] to all DllImport import attributes
//
var module = context.Module;
if ((Type == module.PredefinedAttributes.DllImport || Type == module.PredefinedAttributes.UnmanagedFunctionPointer) && module.HasDefaultCharSet) {
if (rc == null)
rc = CreateResolveContext ();
AddModuleCharSet (rc);
}
if (NamedArguments != null) {
if (rc == null)
rc = CreateResolveContext ();
if (!ResolveNamedArguments (rc))
return null;
}
resolve_error = false;
return ctor;
}
MethodSpec ResolveConstructor (ResolveContext ec)
{
if (pos_args != null) {
bool dynamic;
pos_args.Resolve (ec, out dynamic);
if (dynamic) {
Error_AttributeArgumentIsDynamic (ec.MemberContext, loc);
return null;
}
}
return Expression.ConstructorLookup (ec, Type, ref pos_args, loc);
}
bool ResolveNamedArguments (ResolveContext ec)
{
int named_arg_count = NamedArguments.Count;
var seen_names = new List<string> (named_arg_count);
named_values = new List<KeyValuePair<MemberExpr, NamedArgument>> (named_arg_count);
foreach (NamedArgument a in NamedArguments) {
string name = a.Name;
if (seen_names.Contains (name)) {
ec.Report.Error (643, a.Location, "Duplicate named attribute `{0}' argument", name);
continue;
}
seen_names.Add (name);
a.Resolve (ec);
Expression member = Expression.MemberLookup (ec, false, Type, name, 0, Expression.MemberLookupRestrictions.ExactArity, loc);
if (member == null) {
member = Expression.MemberLookup (ec, true, Type, name, 0, Expression.MemberLookupRestrictions.ExactArity, loc);
if (member != null) {
// TODO: ec.Report.SymbolRelatedToPreviousError (member);
Expression.ErrorIsInaccesible (ec, member.GetSignatureForError (), loc);
return false;
}
}
if (member == null){
Expression.Error_TypeDoesNotContainDefinition (ec, Location, Type, name);
return false;
}
if (!(member is PropertyExpr || member is FieldExpr)) {
Error_InvalidNamedArgument (ec, a);
return false;
}
ObsoleteAttribute obsolete_attr;
if (member is PropertyExpr) {
var pi = ((PropertyExpr) member).PropertyInfo;
if (!pi.HasSet || !pi.HasGet || pi.IsStatic || !pi.Get.IsPublic || !pi.Set.IsPublic) {
ec.Report.SymbolRelatedToPreviousError (pi);
Error_InvalidNamedArgument (ec, a);
return false;
}
if (!IsValidArgumentType (member.Type)) {
ec.Report.SymbolRelatedToPreviousError (pi);
Error_InvalidNamedArgumentType (ec, a);
return false;
}
obsolete_attr = pi.GetAttributeObsolete ();
pi.MemberDefinition.SetIsAssigned ();
} else {
var fi = ((FieldExpr) member).Spec;
if (fi.IsReadOnly || fi.IsStatic || !fi.IsPublic) {
Error_InvalidNamedArgument (ec, a);
return false;
}
if (!IsValidArgumentType (member.Type)) {
ec.Report.SymbolRelatedToPreviousError (fi);
Error_InvalidNamedArgumentType (ec, a);
return false;
}
obsolete_attr = fi.GetAttributeObsolete ();
fi.MemberDefinition.SetIsAssigned ();
}
if (obsolete_attr != null && !context.IsObsolete)
AttributeTester.Report_ObsoleteMessage (obsolete_attr, member.GetSignatureForError (), member.Location, Report);
if (a.Type != member.Type) {
a.Expr = Convert.ImplicitConversionRequired (ec, a.Expr, member.Type, a.Expr.Location);
}
if (a.Expr != null)
named_values.Add (new KeyValuePair<MemberExpr, NamedArgument> ((MemberExpr) member, a));
}
return true;
}
/// <summary>
/// Get a string containing a list of valid targets for the attribute 'attr'
/// </summary>
public string GetValidTargets ()
{
StringBuilder sb = new StringBuilder ();
AttributeTargets targets = Type.GetAttributeUsage (context.Module.PredefinedAttributes.AttributeUsage).ValidOn;
if ((targets & AttributeTargets.Assembly) != 0)
sb.Append ("assembly, ");
if ((targets & AttributeTargets.Module) != 0)
sb.Append ("module, ");
if ((targets & AttributeTargets.Class) != 0)
sb.Append ("class, ");
if ((targets & AttributeTargets.Struct) != 0)
sb.Append ("struct, ");
if ((targets & AttributeTargets.Enum) != 0)
sb.Append ("enum, ");
if ((targets & AttributeTargets.Constructor) != 0)
sb.Append ("constructor, ");
if ((targets & AttributeTargets.Method) != 0)
sb.Append ("method, ");
if ((targets & AttributeTargets.Property) != 0)
sb.Append ("property, indexer, ");
if ((targets & AttributeTargets.Field) != 0)
sb.Append ("field, ");
if ((targets & AttributeTargets.Event) != 0)
sb.Append ("event, ");
if ((targets & AttributeTargets.Interface) != 0)
sb.Append ("interface, ");
if ((targets & AttributeTargets.Parameter) != 0)
sb.Append ("parameter, ");
if ((targets & AttributeTargets.Delegate) != 0)
sb.Append ("delegate, ");
if ((targets & AttributeTargets.ReturnValue) != 0)
sb.Append ("return, ");
if ((targets & AttributeTargets.GenericParameter) != 0)
sb.Append ("type parameter, ");
return sb.Remove (sb.Length - 2, 2).ToString ();
}
public AttributeUsageAttribute GetAttributeUsageAttribute ()
{
if (!arg_resolved)
// TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
// But because a lot of attribute class code must be rewritten will be better to wait...
Resolve ();
if (resolve_error)
return DefaultUsageAttribute;
AttributeUsageAttribute usage_attribute = new AttributeUsageAttribute ((AttributeTargets) ((Constant) pos_args[0].Expr).GetValue ());
var field = GetNamedValue ("AllowMultiple") as BoolConstant;
if (field != null)
usage_attribute.AllowMultiple = field.Value;
field = GetNamedValue ("Inherited") as BoolConstant;
if (field != null)
usage_attribute.Inherited = field.Value;
return usage_attribute;
}
/// <summary>
/// Returns custom name of indexer
/// </summary>
public string GetIndexerAttributeValue ()
{
if (!arg_resolved)
// TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
// But because a lot of attribute class code must be rewritten will be better to wait...
Resolve ();
if (resolve_error || pos_args.Count != 1 || !(pos_args[0].Expr is Constant))
return null;
return ((Constant) pos_args[0].Expr).GetValue () as string;
}
/// <summary>
/// Returns condition of ConditionalAttribute
/// </summary>
public string GetConditionalAttributeValue ()
{
if (!arg_resolved)
// TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
// But because a lot of attribute class code must be rewritten will be better to wait...
Resolve ();
if (resolve_error)
return null;
return ((Constant) pos_args[0].Expr).GetValue () as string;
}
/// <summary>
/// Creates the instance of ObsoleteAttribute from this attribute instance
/// </summary>
public ObsoleteAttribute GetObsoleteAttribute ()
{
if (!arg_resolved) {
// corlib only case when obsolete is used before is resolved
var c = Type.MemberDefinition as Class;
if (c != null && !c.HasMembersDefined)
c.Define ();
// TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
// But because a lot of attribute class code must be rewritten will be better to wait...
Resolve ();
}
if (resolve_error)
return null;
if (pos_args == null)
return new ObsoleteAttribute ();
string msg = ((Constant) pos_args[0].Expr).GetValue () as string;
if (pos_args.Count == 1)
return new ObsoleteAttribute (msg);
return new ObsoleteAttribute (msg, ((BoolConstant) pos_args[1].Expr).Value);
}
/// <summary>
/// Returns value of CLSCompliantAttribute contructor parameter but because the method can be called
/// before ApplyAttribute. We need to resolve the arguments.
/// This situation occurs when class deps is differs from Emit order.
/// </summary>
public bool GetClsCompliantAttributeValue ()
{
if (!arg_resolved)
// TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
// But because a lot of attribute class code must be rewritten will be better to wait...
Resolve ();
if (resolve_error)
return false;
return ((BoolConstant) pos_args[0].Expr).Value;
}
public TypeSpec GetCoClassAttributeValue ()
{
if (!arg_resolved)
Resolve ();
if (resolve_error)
return null;
return GetArgumentType ();
}
public bool CheckTarget ()
{
string[] valid_targets = Owner.ValidAttributeTargets;
if (ExplicitTarget == null || ExplicitTarget == valid_targets [0]) {
Target = Owner.AttributeTargets;
return true;
}
// TODO: we can skip the first item
if (Array.Exists (valid_targets, i => i == ExplicitTarget)) {
switch (ExplicitTarget) {
case "return": Target = AttributeTargets.ReturnValue; return true;
case "param": Target = AttributeTargets.Parameter; return true;
case "field": Target = AttributeTargets.Field; return true;
case "method": Target = AttributeTargets.Method; return true;
case "property": Target = AttributeTargets.Property; return true;
case "module": Target = AttributeTargets.Module; return true;
}
throw new InternalErrorException ("Unknown explicit target: " + ExplicitTarget);
}
StringBuilder sb = new StringBuilder ();
foreach (string s in valid_targets) {
sb.Append (s);
sb.Append (", ");
}
sb.Remove (sb.Length - 2, 2);
Report.Warning (657, 1, Location,
"`{0}' is not a valid attribute location for this declaration. Valid attribute locations for this declaration are `{1}'. All attributes in this section will be ignored",
ExplicitTarget, sb.ToString ());
return false;
}
/// <summary>
/// Tests permitted SecurityAction for assembly or other types
/// </summary>
bool IsSecurityActionValid ()
{
SecurityAction action = GetSecurityActionValue ();
bool for_assembly = Target == AttributeTargets.Assembly || Target == AttributeTargets.Module;
switch (action) {
#pragma warning disable 618
case SecurityAction.Demand:
case SecurityAction.Assert:
case SecurityAction.Deny:
case SecurityAction.PermitOnly:
case SecurityAction.LinkDemand:
case SecurityAction.InheritanceDemand:
if (!for_assembly)
return true;
break;
case SecurityAction.RequestMinimum:
case SecurityAction.RequestOptional:
case SecurityAction.RequestRefuse:
if (for_assembly)
return true;
break;
#pragma warning restore 618
default:
Error_AttributeEmitError ("SecurityAction is out of range");
return false;
}
Error_AttributeEmitError (String.Concat ("SecurityAction `", action, "' is not valid for this declaration"));
return false;
}
System.Security.Permissions.SecurityAction GetSecurityActionValue ()
{
return (SecurityAction) ((Constant) pos_args[0].Expr).GetValue ();
}
/// <summary>
/// Creates instance of SecurityAttribute class and add result of CreatePermission method to permission table.
/// </summary>
/// <returns></returns>
public void ExtractSecurityPermissionSet (MethodSpec ctor, ref SecurityType permissions)
{
#if STATIC
object[] values = new object[pos_args.Count];
for (int i = 0; i < values.Length; ++i)
values[i] = ((Constant) pos_args[i].Expr).GetValue ();
PropertyInfo[] prop;
object[] prop_values;
if (named_values == null) {
prop = null;
prop_values = null;
} else {
prop = new PropertyInfo[named_values.Count];
prop_values = new object [named_values.Count];
for (int i = 0; i < prop.Length; ++i) {
prop [i] = ((PropertyExpr) named_values [i].Key).PropertyInfo.MetaInfo;
prop_values [i] = ((Constant) named_values [i].Value.Expr).GetValue ();
}
}
if (permissions == null)
permissions = new SecurityType ();
var cab = new CustomAttributeBuilder ((ConstructorInfo) ctor.GetMetaInfo (), values, prop, prop_values);
permissions.Add (cab);
#else
throw new NotSupportedException ();
#endif
}
public Constant GetNamedValue (string name)
{
if (named_values == null)
return null;
for (int i = 0; i < named_values.Count; ++i) {
if (named_values [i].Value.Name == name)
return named_values [i].Value.Expr as Constant;
}
return null;
}
public CharSet GetCharSetValue ()
{
return (CharSet) System.Enum.Parse (typeof (CharSet), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
}
public bool HasField (string fieldName)
{
if (named_values == null)
return false;
foreach (var na in named_values) {
if (na.Value.Name == fieldName)
return true;
}
return false;
}
//
// Returns true for MethodImplAttribute with MethodImplOptions.InternalCall value
//
public bool IsInternalCall ()
{
return (GetMethodImplOptions () & MethodImplOptions.InternalCall) != 0;
}
public MethodImplOptions GetMethodImplOptions ()
{
MethodImplOptions options = 0;
if (pos_args.Count == 1) {
options = (MethodImplOptions) System.Enum.Parse (typeof (MethodImplOptions), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
} else if (HasField ("Value")) {
var named = GetNamedValue ("Value");
options = (MethodImplOptions) System.Enum.Parse (typeof (MethodImplOptions), named.GetValue ().ToString ());
}
return options;
}
//
// Returns true for StructLayoutAttribute with LayoutKind.Explicit value
//
public bool IsExplicitLayoutKind ()
{
if (pos_args == null || pos_args.Count != 1)
return false;
var value = (LayoutKind) System.Enum.Parse (typeof (LayoutKind), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
return value == LayoutKind.Explicit;
}
public Expression GetParameterDefaultValue ()
{
if (pos_args == null)
return null;
return pos_args[0].Expr;
}
public override bool Equals (object obj)
{
Attribute a = obj as Attribute;
if (a == null)
return false;
return Type == a.Type && Target == a.Target;
}
public override int GetHashCode ()
{
return Type.GetHashCode () ^ Target.GetHashCode ();
}
/// <summary>
/// Emit attribute for Attributable symbol
/// </summary>
public void Emit (Dictionary<Attribute, List<Attribute>> allEmitted)
{
var ctor = Resolve ();
if (ctor == null)
return;
var predefined = context.Module.PredefinedAttributes;
AttributeUsageAttribute usage_attr = Type.GetAttributeUsage (predefined.AttributeUsage);
if ((usage_attr.ValidOn & Target) == 0) {
Report.Error (592, Location, "The attribute `{0}' is not valid on this declaration type. " +
"It is valid on `{1}' declarations only",
GetSignatureForError (), GetValidTargets ());
return;
}
byte[] cdata;
if (pos_args == null && named_values == null) {
cdata = AttributeEncoder.Empty;
} else {
AttributeEncoder encoder = new AttributeEncoder ();
if (pos_args != null) {
var param_types = ctor.Parameters.Types;
for (int j = 0; j < pos_args.Count; ++j) {
var pt = param_types[j];
var arg_expr = pos_args[j].Expr;
if (j == 0) {
if ((Type == predefined.IndexerName || Type == predefined.Conditional) && arg_expr is Constant) {
string v = ((Constant) arg_expr).GetValue () as string;
if (!Tokenizer.IsValidIdentifier (v) || (Type == predefined.IndexerName && Tokenizer.IsKeyword (v))) {
context.Module.Compiler.Report.Error (633, arg_expr.Location,
"The argument to the `{0}' attribute must be a valid identifier", GetSignatureForError ());
return;
}
} else if (Type == predefined.Guid) {
try {
string v = ((StringConstant) arg_expr).Value;
new Guid (v);
} catch (Exception e) {
Error_AttributeEmitError (e.Message);
return;
}
} else if (Type == predefined.AttributeUsage) {
int v = ((IntConstant) ((EnumConstant) arg_expr).Child).Value;
if (v == 0) {
context.Module.Compiler.Report.Error (591, Location, "Invalid value for argument to `{0}' attribute",
"System.AttributeUsage");
}
} else if (Type == predefined.MarshalAs) {
if (pos_args.Count == 1) {
var u_type = (UnmanagedType) System.Enum.Parse (typeof (UnmanagedType), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
if (u_type == UnmanagedType.ByValArray && !(Owner is FieldBase)) {
Error_AttributeEmitError ("Specified unmanaged type is only valid on fields");
}
}
} else if (Type == predefined.DllImport) {
if (pos_args.Count == 1 && pos_args[0].Expr is Constant) {
var value = ((Constant) pos_args[0].Expr).GetValue () as string;
if (string.IsNullOrEmpty (value))
Error_AttributeEmitError ("DllName cannot be empty or null");
}
} else if (Type == predefined.MethodImpl && pt.BuiltinType == BuiltinTypeSpec.Type.Short &&
!System.Enum.IsDefined (typeof (MethodImplOptions), ((Constant) arg_expr).GetValue ().ToString ())) {
Error_AttributeEmitError ("Incorrect argument value.");
return;
}
}
arg_expr.EncodeAttributeValue (context, encoder, pt);
}
}
if (named_values != null) {
encoder.Encode ((ushort) named_values.Count);
foreach (var na in named_values) {
if (na.Key is FieldExpr)
encoder.Encode ((byte) 0x53);
else
encoder.Encode ((byte) 0x54);
encoder.Encode (na.Key.Type);
encoder.Encode (na.Value.Name);
na.Value.Expr.EncodeAttributeValue (context, encoder, na.Key.Type);
}
} else {
encoder.EncodeEmptyNamedArguments ();
}
cdata = encoder.ToArray ();
}
try {
foreach (Attributable target in targets)
target.ApplyAttributeBuilder (this, ctor, cdata, predefined);
} catch (Exception e) {
if (e is BadImageFormat && Report.Errors > 0)
return;
Error_AttributeEmitError (e.Message);
return;
}
if (!usage_attr.AllowMultiple && allEmitted != null) {
if (allEmitted.ContainsKey (this)) {
var a = allEmitted [this];
if (a == null) {
a = new List<Attribute> (2);
allEmitted [this] = a;
}
a.Add (this);
} else {
allEmitted.Add (this, null);
}
}
if (!context.Module.Compiler.Settings.VerifyClsCompliance)
return;
// Here we are testing attribute arguments for array usage (error 3016)
if (Owner.IsClsComplianceRequired ()) {
if (pos_args != null)
pos_args.CheckArrayAsAttribute (context.Module.Compiler);
if (NamedArguments == null)
return;
NamedArguments.CheckArrayAsAttribute (context.Module.Compiler);
}
}
private Expression GetValue ()
{
if (pos_args == null || pos_args.Count < 1)
return null;
return pos_args[0].Expr;
}
public string GetString ()
{
Expression e = GetValue ();
if (e is StringConstant)
return ((StringConstant)e).Value;
return null;
}
public bool GetBoolean ()
{
Expression e = GetValue ();
if (e is BoolConstant)
return ((BoolConstant)e).Value;
return false;
}
public TypeSpec GetArgumentType ()
{
TypeOf e = GetValue () as TypeOf;
if (e == null)
return null;
return e.TypeArgument;
}
}
public class Attributes
{
public readonly List<Attribute> Attrs;
#if FULL_AST
public readonly List<List<Attribute>> Sections = new List<List<Attribute>> ();
#endif
public Attributes (Attribute a)
{
Attrs = new List<Attribute> ();
Attrs.Add (a);
#if FULL_AST
Sections.Add (Attrs);
#endif
}
public Attributes (List<Attribute> attrs)
{
Attrs = attrs;
#if FULL_AST
Sections.Add (attrs);
#endif
}
public void AddAttribute (Attribute attr)
{
Attrs.Add (attr);
}
public void AddAttributes (List<Attribute> attrs)
{
#if FULL_AST
Sections.Add (attrs);
#else
Attrs.AddRange (attrs);
#endif
}
public void AttachTo (Attributable attributable, IMemberContext context)
{
foreach (Attribute a in Attrs)
a.AttachTo (attributable, context);
}
public Attributes Clone ()
{
var al = new List<Attribute> (Attrs.Count);
foreach (Attribute a in Attrs)
al.Add (a.Clone ());
return new Attributes (al);
}
/// <summary>
/// Checks whether attribute target is valid for the current element
/// </summary>
public bool CheckTargets ()
{
for (int i = 0; i < Attrs.Count; ++i) {
if (!Attrs [i].CheckTarget ())
Attrs.RemoveAt (i--);
}
return true;
}
public void ConvertGlobalAttributes (TypeContainer member, NamespaceContainer currentNamespace, bool isGlobal)
{
var member_explicit_targets = member.ValidAttributeTargets;
for (int i = 0; i < Attrs.Count; ++i) {
var attr = Attrs[0];
if (attr.ExplicitTarget == null)
continue;
int ii;
for (ii = 0; ii < member_explicit_targets.Length; ++ii) {
if (attr.ExplicitTarget == member_explicit_targets[ii]) {
ii = -1;
break;
}
}
if (ii < 0 || !isGlobal)
continue;
member.Module.AddAttribute (attr, currentNamespace);
Attrs.RemoveAt (i);
--i;
}
}
public bool HasResolveError()
{
foreach (var a in Attrs) {
if (a.ResolveError)
return true;
}
return false;
}
public Attribute Search (PredefinedAttribute t)
{
return Search (null, t);
}
public Attribute Search (string explicitTarget, PredefinedAttribute t)
{
foreach (Attribute a in Attrs) {
if (explicitTarget != null && a.ExplicitTarget != explicitTarget)
continue;
if (a.ResolveTypeForComparison () == t)
return a;
}
return null;
}
/// <summary>
/// Returns all attributes of type 't'. Use it when attribute is AllowMultiple = true
/// </summary>
public Attribute[] SearchMulti (PredefinedAttribute t)
{
List<Attribute> ar = null;
foreach (Attribute a in Attrs) {
if (a.ResolveTypeForComparison () == t) {
if (ar == null)
ar = new List<Attribute> (Attrs.Count);
ar.Add (a);
}
}
return ar == null ? null : ar.ToArray ();
}
public void Emit ()
{
CheckTargets ();
Dictionary<Attribute, List<Attribute>> ld = Attrs.Count > 1 ? new Dictionary<Attribute, List<Attribute>> () : null;
foreach (Attribute a in Attrs)
a.Emit (ld);
if (ld == null || ld.Count == 0)
return;
foreach (var d in ld) {
if (d.Value == null)
continue;
Attribute a = d.Key;
foreach (Attribute collision in d.Value)
a.Report.SymbolRelatedToPreviousError (collision.Location, "");
a.Report.Error (579, a.Location, "The attribute `{0}' cannot be applied multiple times",
a.GetSignatureForError ());
}
}
public bool Contains (PredefinedAttribute t)
{
return Search (t) != null;
}
}
public sealed class AttributeEncoder
{
[Flags]
public enum EncodedTypeProperties
{
None = 0,
DynamicType = 1,
TypeParameter = 1 << 1
}
public static readonly byte[] Empty;
byte[] buffer;
int pos;
const ushort Version = 1;
static AttributeEncoder ()
{
Empty = new byte[4];
Empty[0] = (byte) Version;
}
public AttributeEncoder ()
{
buffer = new byte[32];
Encode (Version);
}
public void Encode (bool value)
{
Encode (value ? (byte) 1 : (byte) 0);
}
public void Encode (byte value)
{
if (pos == buffer.Length)
Grow (1);
buffer [pos++] = value;
}
public void Encode (sbyte value)
{
Encode ((byte) value);
}
public void Encode (short value)
{
if (pos + 2 > buffer.Length)
Grow (2);
buffer[pos++] = (byte) value;
buffer[pos++] = (byte) (value >> 8);
}
public void Encode (ushort value)
{
Encode ((short) value);
}
public void Encode (int value)
{
if (pos + 4 > buffer.Length)
Grow (4);
buffer[pos++] = (byte) value;
buffer[pos++] = (byte) (value >> 8);
buffer[pos++] = (byte) (value >> 16);
buffer[pos++] = (byte) (value >> 24);
}
public void Encode (uint value)
{
Encode ((int) value);
}
public void Encode (long value)
{
if (pos + 8 > buffer.Length)
Grow (8);
buffer[pos++] = (byte) value;
buffer[pos++] = (byte) (value >> 8);
buffer[pos++] = (byte) (value >> 16);
buffer[pos++] = (byte) (value >> 24);
buffer[pos++] = (byte) (value >> 32);
buffer[pos++] = (byte) (value >> 40);
buffer[pos++] = (byte) (value >> 48);
buffer[pos++] = (byte) (value >> 56);
}
public void Encode (ulong value)
{
Encode ((long) value);
}
public void Encode (float value)
{
Encode (SingleConverter.SingleToInt32Bits (value));
}
public void Encode (double value)
{
Encode (BitConverter.DoubleToInt64Bits (value));
}
public void Encode (string value)
{
if (value == null) {
Encode ((byte) 0xFF);
return;
}
var buf = Encoding.UTF8.GetBytes(value);
WriteCompressedValue (buf.Length);
if (pos + buf.Length > buffer.Length)
Grow (buf.Length);
Buffer.BlockCopy (buf, 0, buffer, pos, buf.Length);
pos += buf.Length;
}
public EncodedTypeProperties Encode (TypeSpec type)
{
switch (type.BuiltinType) {
case BuiltinTypeSpec.Type.Bool:
Encode ((byte) 0x02);
break;
case BuiltinTypeSpec.Type.Char:
Encode ((byte) 0x03);
break;
case BuiltinTypeSpec.Type.SByte:
Encode ((byte) 0x04);
break;
case BuiltinTypeSpec.Type.Byte:
Encode ((byte) 0x05);
break;
case BuiltinTypeSpec.Type.Short:
Encode ((byte) 0x06);
break;
case BuiltinTypeSpec.Type.UShort:
Encode ((byte) 0x07);
break;
case BuiltinTypeSpec.Type.Int:
Encode ((byte) 0x08);
break;
case BuiltinTypeSpec.Type.UInt:
Encode ((byte) 0x09);
break;
case BuiltinTypeSpec.Type.Long:
Encode ((byte) 0x0A);
break;
case BuiltinTypeSpec.Type.ULong:
Encode ((byte) 0x0B);
break;
case BuiltinTypeSpec.Type.Float:
Encode ((byte) 0x0C);
break;
case BuiltinTypeSpec.Type.Double:
Encode ((byte) 0x0D);
break;
case BuiltinTypeSpec.Type.String:
Encode ((byte) 0x0E);
break;
case BuiltinTypeSpec.Type.Type:
Encode ((byte) 0x50);
break;
case BuiltinTypeSpec.Type.Object:
Encode ((byte) 0x51);
break;
case BuiltinTypeSpec.Type.Dynamic:
Encode ((byte) 0x51);
return EncodedTypeProperties.DynamicType;
default:
if (type.IsArray) {
Encode ((byte) 0x1D);
return Encode (TypeManager.GetElementType (type));
}
if (type.Kind == MemberKind.Enum) {
Encode ((byte) 0x55);
EncodeTypeName (type);
}
break;
}
return EncodedTypeProperties.None;
}
public void EncodeTypeName (TypeSpec type)
{
var old_type = type.GetMetaInfo ();
Encode (type.MemberDefinition.IsImported ? old_type.AssemblyQualifiedName : old_type.FullName);
}
public void EncodeTypeName (TypeContainer type)
{
Encode (type.GetSignatureForMetadata ());
}
//
// Encodes single property named argument per call
//
public void EncodeNamedPropertyArgument (PropertySpec property, Constant value)
{
Encode ((ushort) 1); // length
Encode ((byte) 0x54); // property
Encode (property.MemberType);
Encode (property.Name);
value.EncodeAttributeValue (null, this, property.MemberType);
}
//
// Encodes single field named argument per call
//
public void EncodeNamedFieldArgument (FieldSpec field, Constant value)
{
Encode ((ushort) 1); // length
Encode ((byte) 0x53); // field
Encode (field.MemberType);
Encode (field.Name);
value.EncodeAttributeValue (null, this, field.MemberType);
}
public void EncodeNamedArguments<T> (T[] members, Constant[] values) where T : MemberSpec, IInterfaceMemberSpec
{
Encode ((ushort) members.Length);
for (int i = 0; i < members.Length; ++i)
{
var member = members[i];
if (member.Kind == MemberKind.Field)
Encode ((byte) 0x53);
else if (member.Kind == MemberKind.Property)
Encode ((byte) 0x54);
else
throw new NotImplementedException (member.Kind.ToString ());
Encode (member.MemberType);
Encode (member.Name);
values [i].EncodeAttributeValue (null, this, member.MemberType);
}
}
public void EncodeEmptyNamedArguments ()
{
Encode ((ushort) 0);
}
void Grow (int inc)
{
int size = System.Math.Max (pos * 4, pos + inc + 2);
Array.Resize (ref buffer, size);
}
void WriteCompressedValue (int value)
{
if (value < 0x80) {
Encode ((byte) value);
return;
}
if (value < 0x4000) {
Encode ((byte) (0x80 | (value >> 8)));
Encode ((byte) value);
return;
}
Encode (value);
}
public byte[] ToArray ()
{
byte[] buf = new byte[pos];
Array.Copy (buffer, buf, pos);
return buf;
}
}
/// <summary>
/// Helper class for attribute verification routine.
/// </summary>
static class AttributeTester
{
/// <summary>
/// Common method for Obsolete error/warning reporting.
/// </summary>
public static void Report_ObsoleteMessage (ObsoleteAttribute oa, string member, Location loc, Report Report)
{
if (oa.IsError) {
Report.Error (619, loc, "`{0}' is obsolete: `{1}'", member, oa.Message);
return;
}
if (oa.Message == null || oa.Message.Length == 0) {
Report.Warning (612, 1, loc, "`{0}' is obsolete", member);
return;
}
Report.Warning (618, 2, loc, "`{0}' is obsolete: `{1}'", member, oa.Message);
}
}
//
// Predefined attribute types
//
public class PredefinedAttributes
{
// Build-in attributes
public readonly PredefinedAttribute ParamArray;
public readonly PredefinedAttribute Out;
// Optional attributes
public readonly PredefinedAttribute Obsolete;
public readonly PredefinedAttribute DllImport;
public readonly PredefinedAttribute MethodImpl;
public readonly PredefinedAttribute MarshalAs;
public readonly PredefinedAttribute In;
public readonly PredefinedAttribute IndexerName;
public readonly PredefinedAttribute Conditional;
public readonly PredefinedAttribute CLSCompliant;
public readonly PredefinedAttribute Security;
public readonly PredefinedAttribute Required;
public readonly PredefinedAttribute Guid;
public readonly PredefinedAttribute AssemblyCulture;
public readonly PredefinedAttribute AssemblyVersion;
public readonly PredefinedAttribute AssemblyAlgorithmId;
public readonly PredefinedAttribute AssemblyFlags;
public readonly PredefinedAttribute AssemblyFileVersion;
public readonly PredefinedAttribute ComImport;
public readonly PredefinedAttribute CoClass;
public readonly PredefinedAttribute AttributeUsage;
public readonly PredefinedAttribute DefaultParameterValue;
public readonly PredefinedAttribute OptionalParameter;
public readonly PredefinedAttribute UnverifiableCode;
public readonly PredefinedAttribute DefaultCharset;
public readonly PredefinedAttribute TypeForwarder;
public readonly PredefinedAttribute FixedBuffer;
public readonly PredefinedAttribute CompilerGenerated;
public readonly PredefinedAttribute InternalsVisibleTo;
public readonly PredefinedAttribute RuntimeCompatibility;
public readonly PredefinedAttribute DebuggerHidden;
public readonly PredefinedAttribute UnsafeValueType;
public readonly PredefinedAttribute UnmanagedFunctionPointer;
public readonly PredefinedDebuggerBrowsableAttribute DebuggerBrowsable;
// New in .NET 3.5
public readonly PredefinedAttribute Extension;
// New in .NET 4.0
public readonly PredefinedDynamicAttribute Dynamic;
// New in .NET 4.5
public readonly PredefinedStateMachineAttribute AsyncStateMachine;
public readonly PredefinedStateMachineAttribute IteratorStateMachine;
//
// Optional types which are used as types and for member lookup
//
public readonly PredefinedAttribute DefaultMember;
public readonly PredefinedDecimalAttribute DecimalConstant;
public readonly PredefinedAttribute StructLayout;
public readonly PredefinedAttribute FieldOffset;
public readonly PredefinedAttribute CallerMemberNameAttribute;
public readonly PredefinedAttribute CallerLineNumberAttribute;
public readonly PredefinedAttribute CallerFilePathAttribute;
public PredefinedAttributes (ModuleContainer module)
{
ParamArray = new PredefinedAttribute (module, "System", "ParamArrayAttribute");
Out = new PredefinedAttribute (module, "System.Runtime.InteropServices", "OutAttribute");
ParamArray.Resolve ();
Out.Resolve ();
Obsolete = new PredefinedAttribute (module, "System", "ObsoleteAttribute");
DllImport = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DllImportAttribute");
MethodImpl = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "MethodImplAttribute");
MarshalAs = new PredefinedAttribute (module, "System.Runtime.InteropServices", "MarshalAsAttribute");
In = new PredefinedAttribute (module, "System.Runtime.InteropServices", "InAttribute");
IndexerName = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "IndexerNameAttribute");
Conditional = new PredefinedAttribute (module, "System.Diagnostics", "ConditionalAttribute");
CLSCompliant = new PredefinedAttribute (module, "System", "CLSCompliantAttribute");
Security = new PredefinedAttribute (module, "System.Security.Permissions", "SecurityAttribute");
Required = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "RequiredAttributeAttribute");
Guid = new PredefinedAttribute (module, "System.Runtime.InteropServices", "GuidAttribute");
AssemblyCulture = new PredefinedAttribute (module, "System.Reflection", "AssemblyCultureAttribute");
AssemblyVersion = new PredefinedAttribute (module, "System.Reflection", "AssemblyVersionAttribute");
AssemblyAlgorithmId = new PredefinedAttribute (module, "System.Reflection", "AssemblyAlgorithmIdAttribute");
AssemblyFlags = new PredefinedAttribute (module, "System.Reflection", "AssemblyFlagsAttribute");
AssemblyFileVersion = new PredefinedAttribute (module, "System.Reflection", "AssemblyFileVersionAttribute");
ComImport = new PredefinedAttribute (module, "System.Runtime.InteropServices", "ComImportAttribute");
CoClass = new PredefinedAttribute (module, "System.Runtime.InteropServices", "CoClassAttribute");
AttributeUsage = new PredefinedAttribute (module, "System", "AttributeUsageAttribute");
DefaultParameterValue = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DefaultParameterValueAttribute");
OptionalParameter = new PredefinedAttribute (module, "System.Runtime.InteropServices", "OptionalAttribute");
UnverifiableCode = new PredefinedAttribute (module, "System.Security", "UnverifiableCodeAttribute");
DefaultCharset = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DefaultCharSetAttribute");
TypeForwarder = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "TypeForwardedToAttribute");
FixedBuffer = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "FixedBufferAttribute");
CompilerGenerated = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CompilerGeneratedAttribute");
InternalsVisibleTo = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "InternalsVisibleToAttribute");
RuntimeCompatibility = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
DebuggerHidden = new PredefinedAttribute (module, "System.Diagnostics", "DebuggerHiddenAttribute");
UnsafeValueType = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "UnsafeValueTypeAttribute");
UnmanagedFunctionPointer = new PredefinedAttribute (module, "System.Runtime.InteropServices", "UnmanagedFunctionPointerAttribute");
DebuggerBrowsable = new PredefinedDebuggerBrowsableAttribute (module, "System.Diagnostics", "DebuggerBrowsableAttribute");
Extension = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "ExtensionAttribute");
Dynamic = new PredefinedDynamicAttribute (module, "System.Runtime.CompilerServices", "DynamicAttribute");
DefaultMember = new PredefinedAttribute (module, "System.Reflection", "DefaultMemberAttribute");
DecimalConstant = new PredefinedDecimalAttribute (module, "System.Runtime.CompilerServices", "DecimalConstantAttribute");
StructLayout = new PredefinedAttribute (module, "System.Runtime.InteropServices", "StructLayoutAttribute");
FieldOffset = new PredefinedAttribute (module, "System.Runtime.InteropServices", "FieldOffsetAttribute");
AsyncStateMachine = new PredefinedStateMachineAttribute (module, "System.Runtime.CompilerServices", "AsyncStateMachineAttribute");
IteratorStateMachine = new PredefinedStateMachineAttribute (module, "System.Runtime.CompilerServices", "IteratorStateMachineAttribute") {
IsIterator = true
};
CallerMemberNameAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerMemberNameAttribute");
CallerLineNumberAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerLineNumberAttribute");
CallerFilePathAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerFilePathAttribute");
// TODO: Should define only attributes which are used for comparison
const System.Reflection.BindingFlags all_fields = System.Reflection.BindingFlags.Public |
System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.DeclaredOnly;
foreach (var fi in GetType ().GetFields (all_fields)) {
((PredefinedAttribute) fi.GetValue (this)).Define ();
}
}
}
public class PredefinedAttribute : PredefinedType
{
protected MethodSpec ctor;
public PredefinedAttribute (ModuleContainer module, string ns, string name)
: base (module, MemberKind.Class, ns, name)
{
}
#region Properties
public MethodSpec Constructor {
get {
return ctor;
}
}
#endregion
public static bool operator == (TypeSpec type, PredefinedAttribute pa)
{
return type == pa.type && pa.type != null;
}
public static bool operator != (TypeSpec type, PredefinedAttribute pa)
{
return type != pa.type;
}
public override int GetHashCode ()
{
return base.GetHashCode ();
}
public override bool Equals (object obj)
{
throw new NotSupportedException ();
}
public void EmitAttribute (ConstructorBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (MethodBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (PropertyBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (FieldBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (TypeBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (AssemblyBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (ModuleBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
public void EmitAttribute (ParameterBuilder builder)
{
if (ResolveBuilder ())
builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
}
ConstructorInfo GetCtorMetaInfo ()
{
return (ConstructorInfo) ctor.GetMetaInfo ();
}
public bool ResolveBuilder ()
{
if (ctor != null)
return true;
//
// Handle all parameter-less attributes as optional
//
if (!IsDefined)
return false;
ctor = (MethodSpec) MemberCache.FindMember (type, MemberFilter.Constructor (ParametersCompiled.EmptyReadOnlyParameters), BindingRestriction.DeclaredOnly);
return ctor != null;
}
}
public class PredefinedDebuggerBrowsableAttribute : PredefinedAttribute
{
public PredefinedDebuggerBrowsableAttribute (ModuleContainer module, string ns, string name)
: base (module, ns, name)
{
}
public void EmitAttribute (FieldBuilder builder, System.Diagnostics.DebuggerBrowsableState state)
{
var ctor = module.PredefinedMembers.DebuggerBrowsableAttributeCtor.Get ();
if (ctor == null)
return;
AttributeEncoder encoder = new AttributeEncoder ();
encoder.Encode ((int) state);
encoder.EncodeEmptyNamedArguments ();
builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
}
}
public class PredefinedDecimalAttribute : PredefinedAttribute
{
public PredefinedDecimalAttribute (ModuleContainer module, string ns, string name)
: base (module, ns, name)
{
}
public void EmitAttribute (ParameterBuilder builder, decimal value, Location loc)
{
var ctor = module.PredefinedMembers.DecimalConstantAttributeCtor.Resolve (loc);
if (ctor == null)
return;
int[] bits = decimal.GetBits (value);
AttributeEncoder encoder = new AttributeEncoder ();
encoder.Encode ((byte) (bits[3] >> 16));
encoder.Encode ((byte) (bits[3] >> 31));
encoder.Encode ((uint) bits[2]);
encoder.Encode ((uint) bits[1]);
encoder.Encode ((uint) bits[0]);
encoder.EncodeEmptyNamedArguments ();
builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
}
public void EmitAttribute (FieldBuilder builder, decimal value, Location loc)
{
var ctor = module.PredefinedMembers.DecimalConstantAttributeCtor.Resolve (loc);
if (ctor == null)
return;
int[] bits = decimal.GetBits (value);
AttributeEncoder encoder = new AttributeEncoder ();
encoder.Encode ((byte) (bits[3] >> 16));
encoder.Encode ((byte) (bits[3] >> 31));
encoder.Encode ((uint) bits[2]);
encoder.Encode ((uint) bits[1]);
encoder.Encode ((uint) bits[0]);
encoder.EncodeEmptyNamedArguments ();
builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
}
}
public class PredefinedStateMachineAttribute : PredefinedAttribute
{
public PredefinedStateMachineAttribute (ModuleContainer module, string ns, string name)
: base (module, ns, name)
{
}
public bool IsIterator { get; set; }
public void EmitAttribute (MethodBuilder builder, StateMachine type)
{
var predefined_ctor = IsIterator ?
module.PredefinedMembers.IteratorStateMachineAttributeCtor :
module.PredefinedMembers.AsyncStateMachineAttributeCtor;
var ctor = predefined_ctor.Get ();
if (ctor == null)
return;
AttributeEncoder encoder = new AttributeEncoder ();
encoder.EncodeTypeName (type);
encoder.EncodeEmptyNamedArguments ();
builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
}
}
public class PredefinedDynamicAttribute : PredefinedAttribute
{
MethodSpec tctor;
public PredefinedDynamicAttribute (ModuleContainer module, string ns, string name)
: base (module, ns, name)
{
}
public void EmitAttribute (FieldBuilder builder, TypeSpec type, Location loc)
{
if (ResolveTransformationCtor (loc)) {
var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
builder.SetCustomAttribute (cab);
}
}
public void EmitAttribute (ParameterBuilder builder, TypeSpec type, Location loc)
{
if (ResolveTransformationCtor (loc)) {
var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
builder.SetCustomAttribute (cab);
}
}
public void EmitAttribute (PropertyBuilder builder, TypeSpec type, Location loc)
{
if (ResolveTransformationCtor (loc)) {
var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
builder.SetCustomAttribute (cab);
}
}
public void EmitAttribute (TypeBuilder builder, TypeSpec type, Location loc)
{
if (ResolveTransformationCtor (loc)) {
var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
builder.SetCustomAttribute (cab);
}
}
//
// When any element of the type is a dynamic type
//
// This method builds a transformation array for dynamic types
// used in places where DynamicAttribute cannot be applied to.
// It uses bool flag when type is of dynamic type and each
// section always starts with "false" for some reason.
//
// LAMESPEC: This should be part of C# specification
//
// Example: Func<dynamic, int, dynamic[]>
// Transformation: { false, true, false, false, true }
//
static bool[] GetTransformationFlags (TypeSpec t)
{
bool[] element;
var ac = t as ArrayContainer;
if (ac != null) {
element = GetTransformationFlags (ac.Element);
if (element == null)
return null;
bool[] res = new bool[element.Length + 1];
res[0] = false;
Array.Copy (element, 0, res, 1, element.Length);
return res;
}
if (t == null)
return null;
if (t.IsGeneric) {
List<bool> transform = null;
var targs = t.TypeArguments;
for (int i = 0; i < targs.Length; ++i) {
element = GetTransformationFlags (targs[i]);
if (element != null) {
if (transform == null) {
transform = new List<bool> ();
for (int ii = 0; ii <= i; ++ii)
transform.Add (false);
}
transform.AddRange (element);
} else if (transform != null) {
transform.Add (false);
}
}
if (transform != null)
return transform.ToArray ();
}
if (t.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
return new bool[] { true };
return null;
}
bool ResolveTransformationCtor (Location loc)
{
if (tctor != null)
return true;
tctor = module.PredefinedMembers.DynamicAttributeCtor.Resolve (loc);
return tctor != null;
}
}
}