//
// typemanager.cs: C# type manager
//
// Author: Miguel de Icaza (miguel@gnu.org)
// 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.
//
//
// We will eventually remove the SIMPLE_SPEEDUP, and should never change
// the behavior of the compilation. This can be removed if we rework
// the code to get a list of namespaces available.
//
#define SIMPLE_SPEEDUP
using System;
using System.IO;
using System.Globalization;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.Text;
using System.Runtime.CompilerServices;
using System.Diagnostics;
namespace Mono.CSharp {
partial class TypeManager {
//
// A list of core types that the compiler requires or uses
//
static public Type object_type;
static public Type value_type;
static public Type string_type;
static public Type int32_type;
static public Type uint32_type;
static public Type int64_type;
static public Type uint64_type;
static public Type float_type;
static public Type double_type;
static public Type char_type;
static public Type short_type;
static public Type decimal_type;
static public Type bool_type;
static public Type sbyte_type;
static public Type byte_type;
static public Type ushort_type;
static public Type enum_type;
static public Type delegate_type;
static public Type multicast_delegate_type;
static public Type void_type;
static public Type null_type;
static public Type array_type;
static public Type runtime_handle_type;
static public Type type_type;
static public Type ienumerator_type;
static public Type ienumerable_type;
static public Type idisposable_type;
static public Type iasyncresult_type;
static public Type asynccallback_type;
static public Type intptr_type;
static public Type uintptr_type;
static public Type runtime_field_handle_type;
static public Type runtime_argument_handle_type;
static public Type attribute_type;
static public Type void_ptr_type;
static public Type exception_type;
static public Type typed_reference_type;
static public Type arg_iterator_type;
static public Type mbr_type;
public static Type runtime_helpers_type;
//
// C# 2.0
//
static internal Type isvolatile_type;
static public Type generic_ilist_type;
static public Type generic_icollection_type;
static public Type generic_ienumerator_type;
static public Type generic_ienumerable_type;
static public Type generic_nullable_type;
//
// C# 3.0
//
static internal Type expression_type;
public static Type parameter_expression_type;
public static Type fieldinfo_type;
public static Type methodinfo_type;
public static Type ctorinfo_type;
//
// C# 4.0
//
public static Type call_site_type;
public static Type generic_call_site_type;
//
// Expressions representing the internal types. Used during declaration
// definition.
//
static public TypeExpr system_object_expr, system_string_expr;
static public TypeExpr system_boolean_expr, system_decimal_expr;
static public TypeExpr system_single_expr, system_double_expr;
static public TypeExpr system_sbyte_expr, system_byte_expr;
static public TypeExpr system_int16_expr, system_uint16_expr;
static public TypeExpr system_int32_expr, system_uint32_expr;
static public TypeExpr system_int64_expr, system_uint64_expr;
static public TypeExpr system_char_expr, system_void_expr;
static public TypeExpr system_valuetype_expr;
static public TypeExpr system_intptr_expr;
public static TypeExpr expression_type_expr;
//
// These methods are called by code generated by the compiler
//
static public FieldInfo string_empty;
static public MethodInfo system_type_get_type_from_handle;
static public MethodInfo bool_movenext_void;
static public MethodInfo void_dispose_void;
static public MethodInfo void_monitor_enter_object;
static public MethodInfo void_monitor_exit_object;
static public MethodInfo void_initializearray_array_fieldhandle;
static public MethodInfo delegate_combine_delegate_delegate;
static public MethodInfo delegate_remove_delegate_delegate;
static public PropertyInfo int_get_offset_to_string_data;
static public MethodInfo int_interlocked_compare_exchange;
static public PropertyInfo ienumerator_getcurrent;
public static MethodInfo methodbase_get_type_from_handle;
public static MethodInfo methodbase_get_type_from_handle_generic;
public static MethodInfo fieldinfo_get_field_from_handle;
public static MethodInfo fieldinfo_get_field_from_handle_generic;
static public MethodInfo activator_create_instance;
//
// The constructors.
//
static public ConstructorInfo void_decimal_ctor_five_args;
static public ConstructorInfo void_decimal_ctor_int_arg;
static PtrHashtable builder_to_declspace;
static PtrHashtable builder_to_member_cache;
//
// Tracks the interfaces implemented by typebuilders. We only
// enter those who do implement or or more interfaces
//
static PtrHashtable builder_to_ifaces;
//
// Maps a MethodBase to its ParameterData (either InternalParameters or ReflectionParameters)
//
static Hashtable method_params;
//
// A hash table from override methods to their base virtual method.
//
static Hashtable method_overrides;
//
// Keeps track of methods
//
static Hashtable builder_to_method;
//
// Contains all public types from referenced assemblies.
// This member is used only if CLS Compliance verification is required.
//
public static Hashtable AllClsTopLevelTypes;
static Hashtable fieldbuilders_to_fields;
static Hashtable propertybuilder_to_property;
static Hashtable fields;
static Hashtable events;
static PtrHashtable assembly_internals_vis_attrs;
public static void CleanUp ()
{
// Lets get everything clean so that we can collect before generating code
builder_to_declspace = null;
builder_to_member_cache = null;
builder_to_ifaces = null;
builder_to_type_param = null;
method_params = null;
builder_to_method = null;
fields = null;
events = null;
type_hash = null;
propertybuilder_to_property = null;
TypeHandle.CleanUp ();
}
//
// These are expressions that represent some of the internal data types, used
// elsewhere
//
static void InitExpressionTypes ()
{
system_object_expr = new TypeLookupExpression ("System", "Object");
system_string_expr = new TypeLookupExpression ("System", "String");
system_boolean_expr = new TypeLookupExpression ("System", "Boolean");
system_decimal_expr = new TypeLookupExpression ("System", "Decimal");
system_single_expr = new TypeLookupExpression ("System", "Single");
system_double_expr = new TypeLookupExpression ("System", "Double");
system_sbyte_expr = new TypeLookupExpression ("System", "SByte");
system_byte_expr = new TypeLookupExpression ("System", "Byte");
system_int16_expr = new TypeLookupExpression ("System", "Int16");
system_uint16_expr = new TypeLookupExpression ("System", "UInt16");
system_int32_expr = new TypeLookupExpression ("System", "Int32");
system_uint32_expr = new TypeLookupExpression ("System", "UInt32");
system_int64_expr = new TypeLookupExpression ("System", "Int64");
system_uint64_expr = new TypeLookupExpression ("System", "UInt64");
system_char_expr = new TypeLookupExpression ("System", "Char");
system_void_expr = new TypeLookupExpression ("System", "Void");
system_valuetype_expr = new TypeLookupExpression ("System", "ValueType");
system_intptr_expr = new TypeLookupExpression ("System", "IntPtr");
}
static TypeManager ()
{
Reset ();
}
static public void Reset ()
{
InitExpressionTypes ();
builder_to_declspace = new PtrHashtable ();
builder_to_member_cache = new PtrHashtable ();
builder_to_method = new PtrHashtable ();
builder_to_type_param = new PtrHashtable ();
method_params = new PtrHashtable ();
method_overrides = new PtrHashtable ();
builder_to_ifaces = new PtrHashtable ();
fieldbuilders_to_fields = new Hashtable ();
propertybuilder_to_property = new Hashtable ();
fields = new Hashtable ();
type_hash = new DoubleHash ();
assembly_internals_vis_attrs = new PtrHashtable ();
iface_cache = new PtrHashtable ();
closure = new Closure ();
FilterWithClosure_delegate = new MemberFilter (closure.Filter);
// TODO: I am really bored by all this static stuff
system_type_get_type_from_handle =
bool_movenext_void =
void_dispose_void =
void_monitor_enter_object =
void_monitor_exit_object =
void_initializearray_array_fieldhandle =
delegate_combine_delegate_delegate =
delegate_remove_delegate_delegate =
int_interlocked_compare_exchange =
methodbase_get_type_from_handle =
methodbase_get_type_from_handle_generic =
fieldinfo_get_field_from_handle =
fieldinfo_get_field_from_handle_generic =
activator_create_instance = null;
int_get_offset_to_string_data =
ienumerator_getcurrent = null;
void_decimal_ctor_five_args =
void_decimal_ctor_int_arg = null;
isvolatile_type = null;
// to uncover regressions
AllClsTopLevelTypes = null;
}
public static void AddUserType (DeclSpace ds)
{
builder_to_declspace.Add (ds.TypeBuilder, ds);
}
//
// This entry point is used by types that we define under the covers
//
public static void RegisterBuilder (Type tb, Type [] ifaces)
{
if (ifaces != null)
builder_to_ifaces [tb] = ifaces;
}
public static void AddMethod (MethodBase builder, IMethodData method)
{
builder_to_method.Add (builder, method);
method_params.Add (builder, method.ParameterInfo);
}
public static IMethodData GetMethod (MethodBase builder)
{
return (IMethodData) builder_to_method [builder];
}
///
/// Returns the DeclSpace whose Type is `t' or null if there is no
/// DeclSpace for `t' (ie, the Type comes from a library)
///
public static DeclSpace LookupDeclSpace (Type t)
{
return builder_to_declspace [t] as DeclSpace;
}
///
/// Returns the TypeContainer whose Type is `t' or null if there is no
/// TypeContainer for `t' (ie, the Type comes from a library)
///
public static TypeContainer LookupTypeContainer (Type t)
{
return builder_to_declspace [t] as TypeContainer;
}
public static MemberCache LookupMemberCache (Type t)
{
if (t.Module == RootContext.ToplevelTypes.Builder) {
DeclSpace container = (DeclSpace)builder_to_declspace [t];
if (container != null)
return container.MemberCache;
}
#if GMCS_SOURCE
if (t is GenericTypeParameterBuilder) {
TypeParameter container = builder_to_type_param [t] as TypeParameter;
if (container != null)
return container.MemberCache;
}
#endif
return TypeHandle.GetMemberCache (t);
}
public static MemberCache LookupBaseInterfacesCache (Type t)
{
Type [] ifaces = GetInterfaces (t);
if (ifaces != null && ifaces.Length == 1)
return LookupMemberCache (ifaces [0]);
// TODO: the builder_to_member_cache should be indexed by 'ifaces', not 't'
MemberCache cache = builder_to_member_cache [t] as MemberCache;
if (cache != null)
return cache;
cache = new MemberCache (ifaces);
builder_to_member_cache.Add (t, cache);
return cache;
}
public static TypeContainer LookupInterface (Type t)
{
TypeContainer tc = (TypeContainer) builder_to_declspace [t];
if ((tc == null) || (tc.Kind != Kind.Interface))
return null;
return tc;
}
public static Delegate LookupDelegate (Type t)
{
return builder_to_declspace [t] as Delegate;
}
public static Class LookupClass (Type t)
{
return (Class) builder_to_declspace [t];
}
//
// We use this hash for multiple kinds of constructed types:
//
// (T, "&") Given T, get T &
// (T, "*") Given T, get T *
// (T, "[]") Given T and a array dimension, get T []
// (T, X) Given a type T and a simple name X, get the type T+X
//
// Accessibility tests, if necessary, should be done by the user
//
static DoubleHash type_hash = new DoubleHash ();
//
// Gets the reference to T version of the Type (T&)
//
public static Type GetReferenceType (Type t)
{
#if GMCS_SOURCE
return t.MakeByRefType ();
#else
return GetConstructedType (t, "&");
#endif
}
//
// Gets the pointer to T version of the Type (T*)
//
public static Type GetPointerType (Type t)
{
return GetConstructedType (t, "*");
}
public static Type GetConstructedType (Type t, string dim)
{
object ret = null;
if (type_hash.Lookup (t, dim, out ret))
return (Type) ret;
ret = t.Module.GetType (t.ToString () + dim);
if (ret != null) {
type_hash.Insert (t, dim, ret);
return (Type) ret;
}
if (dim == "&") {
ret = GetReferenceType (t);
type_hash.Insert (t, dim, ret);
return (Type) ret;
}
#if GMCS_SOURCE
if (t.IsGenericParameter || t.IsGenericType) {
int pos = 0;
Type result = t;
while ((pos < dim.Length) && (dim [pos] == '[')) {
pos++;
if (dim [pos] == ']') {
result = result.MakeArrayType ();
pos++;
if (pos < dim.Length)
continue;
type_hash.Insert (t, dim, result);
return result;
}
int rank = 0;
while (dim [pos] == ',') {
pos++; rank++;
}
if ((dim [pos] != ']') || (pos != dim.Length-1))
break;
result = result.MakeArrayType (rank + 1);
type_hash.Insert (t, dim, result);
return result;
}
}
#endif
type_hash.Insert (t, dim, null);
return null;
}
public static Type GetNestedType (Type t, string name)
{
object ret = null;
if (!type_hash.Lookup (t, name, out ret)) {
ret = t.GetNestedType (name,
BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
type_hash.Insert (t, name, ret);
}
return (Type) ret;
}
///
/// Fills static table with exported types from all referenced assemblies.
/// This information is required for CLS Compliance tests.
///
public static void LoadAllImportedTypes ()
{
AllClsTopLevelTypes = new Hashtable (1500);
foreach (Assembly a in GlobalRootNamespace.Instance.Assemblies) {
foreach (Type t in a.GetExportedTypes ()) {
AllClsTopLevelTypes [t.FullName.ToLower (System.Globalization.CultureInfo.InvariantCulture)] = null;
}
}
}
public static bool NamespaceClash (string name, Location loc)
{
if (!GlobalRootNamespace.Instance.IsNamespace (name))
return false;
Report.Error (519, loc, String.Format ("`{0}' clashes with a predefined namespace", name));
return true;
}
///
/// Returns the C# name of a type if possible, or the full type name otherwise
///
static public string CSharpName (Type t)
{
if (t == null_type)
return "null";
if (t == typeof (ArglistAccess))
return "__arglist";
if (t == typeof (AnonymousMethodBody))
return "anonymous method";
if (t == typeof (MethodGroupExpr))
return "method group";
if (t == null)
return "internal error";
return CSharpName (GetFullName (t), t);
}
static readonly char [] elements = new char [] { '*', '[' };
public static string CSharpName (string name, Type type)
{
if (name.Length > 10) {
string s;
switch (name) {
case "System.Int32": s = "int"; break;
case "System.Int64": s = "long"; break;
case "System.String": s = "string"; break;
case "System.Boolean": s = "bool"; break;
case "System.Void": s = "void"; break;
case "System.Object": s = "object"; break;
case "System.UInt32": s = "uint"; break;
case "System.Int16": s = "short"; break;
case "System.UInt16": s = "ushort"; break;
case "System.UInt64": s = "ulong"; break;
case "System.Single": s = "float"; break;
case "System.Double": s = "double"; break;
case "System.Decimal": s = "decimal"; break;
case "System.Char": s = "char"; break;
case "System.Byte": s = "byte"; break;
case "System.SByte": s = "sbyte"; break;
default: s = null; break;
}
if (s != null) {
//
// Predefined names can come from mscorlib only
//
if (type == null || type.Module.Name == "mscorlib.dll" || !RootContext.StdLib)
return s;
return name;
}
if (name [0] == AnonymousTypeClass.ClassNamePrefix [0] && name.StartsWith (AnonymousTypeClass.ClassNamePrefix))
return AnonymousTypeClass.SignatureForError;
int idx = name.IndexOfAny (elements, 10);
if (idx > 0)
return CSharpName (name.Substring (0, idx), type) + name.Substring (idx);
}
return name.Replace ('+', '.');
}
static public string CSharpName (Type[] types)
{
if (types.Length == 0)
return string.Empty;
StringBuilder sb = new StringBuilder ();
for (int i = 0; i < types.Length; ++i) {
if (i > 0)
sb.Append (", ");
sb.Append (CSharpName (types [i]));
}
return sb.ToString ();
}
///
/// Returns the signature of the method with full namespace classification
///
static public string GetFullNameSignature (MemberInfo mi)
{
PropertyInfo pi = mi as PropertyInfo;
if (pi != null) {
MethodBase pmi = pi.GetGetMethod (true);
if (pmi == null)
pmi = pi.GetSetMethod (true);
if (GetParameterData (pmi).Count > 0)
mi = pmi;
}
return (mi is MethodBase)
? CSharpSignature (mi as MethodBase)
: CSharpName (mi.DeclaringType) + '.' + mi.Name;
}
#if GMCS_SOURCE
private static int GetFullName (Type t, StringBuilder sb)
{
int pos = 0;
if (!t.IsGenericType) {
sb.Append (t.FullName);
return 0;
}
if (t.DeclaringType != null) {
pos = GetFullName (t.DeclaringType, sb);
sb.Append ('.');
} else if (t.Namespace != null && t.Namespace.Length != 0) {
sb.Append (t.Namespace);
sb.Append ('.');
}
sb.Append (RemoveGenericArity (t.Name));
Type[] this_args = GetTypeArguments (t);
if (this_args.Length < pos)
throw new InternalErrorException (
"Enclosing class " + t.DeclaringType + " has more type arguments than " + t);
if (this_args.Length == pos)
return pos;
sb.Append ('<');
for (;;) {
sb.Append (CSharpName (this_args [pos++]));
if (pos == this_args.Length)
break;
sb.Append (',');
}
sb.Append ('>');
return pos;
}
static string GetFullName (Type t)
{
if (t.IsArray) {
string dimension = t.Name.Substring (t.Name.LastIndexOf ('['));
return GetFullName (GetElementType (t)) + dimension;
}
if (IsNullableType (t) && !t.IsGenericTypeDefinition) {
t = TypeToCoreType (GetTypeArguments (t)[0]);
return CSharpName (t) + "?";
}
if (t.IsGenericParameter)
return t.Name;
if (!t.IsGenericType)
return t.FullName;
StringBuilder sb = new StringBuilder ();
int pos = GetFullName (t, sb);
if (pos <= 0)
throw new InternalErrorException ("Generic Type " + t + " doesn't have type arguments");
return sb.ToString ();
}
#else
public static string GetFullName (Type t)
{
return t.FullName;
}
#endif
public static string RemoveGenericArity (string from)
{
int i = from.IndexOf ('`');
if (i > 0)
return from.Substring (0, i);
return from;
}
///
/// When we need to report accessors as well
///
static public string CSharpSignature (MethodBase mb)
{
return CSharpSignature (mb, false);
}
///
/// Returns the signature of the method
///
static public string CSharpSignature (MethodBase mb, bool show_accessor)
{
StringBuilder sig = new StringBuilder (CSharpName (mb.DeclaringType));
sig.Append ('.');
AParametersCollection iparams = GetParameterData (mb);
string parameters = iparams.GetSignatureForError ();
int accessor_end = 0;
if (!mb.IsConstructor && TypeManager.IsSpecialMethod (mb)) {
string op_name = Operator.GetName (mb.Name);
if (op_name != null) {
if (op_name == "explicit" || op_name == "implicit") {
sig.Append (op_name);
sig.Append (" operator ");
sig.Append (CSharpName (((MethodInfo)mb).ReturnType));
} else {
sig.Append ("operator ");
sig.Append (op_name);
}
sig.Append (parameters);
return sig.ToString ();
}
bool is_getter = mb.Name.StartsWith ("get_");
bool is_setter = mb.Name.StartsWith ("set_");
if (is_getter || is_setter || mb.Name.StartsWith ("add_")) {
accessor_end = 3;
} else if (mb.Name.StartsWith ("remove_")) {
accessor_end = 6;
}
// Is indexer
if (iparams.Count > (is_getter ? 0 : 1)) {
sig.Append ("this[");
if (is_getter)
sig.Append (parameters.Substring (1, parameters.Length - 2));
else
sig.Append (parameters.Substring (1, parameters.LastIndexOf (',') - 1));
sig.Append (']');
} else {
sig.Append (mb.Name.Substring (accessor_end + 1));
}
} else {
if (mb.Name == ".ctor")
sig.Append (RemoveGenericArity (mb.DeclaringType.Name));
else {
sig.Append (mb.Name);
if (IsGenericMethod (mb)) {
Type[] args = GetGenericArguments (mb);
sig.Append ('<');
for (int i = 0; i < args.Length; i++) {
if (i > 0)
sig.Append (',');
sig.Append (CSharpName (args [i]));
}
sig.Append ('>');
}
}
sig.Append (parameters);
}
if (show_accessor && accessor_end > 0) {
sig.Append ('.');
sig.Append (mb.Name.Substring (0, accessor_end));
}
return sig.ToString ();
}
public static string GetMethodName (MethodInfo m)
{
if (!IsGenericMethodDefinition (m) && !IsGenericMethod (m))
return m.Name;
return MemberName.MakeName (m.Name, TypeManager.GetGenericArguments (m).Length);
}
static public string CSharpSignature (EventInfo ei)
{
return CSharpName (ei.DeclaringType) + "." + ei.Name;
}
//
// Looks up a type, and aborts if it is not found. This is used
// by predefined types required by the compiler
//
public static Type CoreLookupType (string ns_name, string name, Kind type_kind, bool required)
{
Namespace ns = GlobalRootNamespace.Instance.GetNamespace (ns_name, true);
Expression expr = ns.Lookup (RootContext.ToplevelTypes, name, Location.Null);
if (expr == null) {
if (required) {
Report.Error (518, "The predefined type `{0}.{1}' is not defined or imported",
ns_name, name);
}
return null;
}
Type t = expr.Type;
if (RootContext.StdLib || t == null || !required)
return t;
// TODO: All predefined imported types have to have correct signature
if (t.Module != RootContext.ToplevelTypes.Builder)
return t;
DeclSpace ds = (DeclSpace)RootContext.ToplevelTypes.GetDefinition (t.FullName);
if (ds is Delegate) {
if (type_kind == Kind.Delegate)
return t;
} else {
TypeContainer tc = (TypeContainer)ds;
if (tc.Kind == type_kind)
return t;
}
Report.Error (520, ds.Location, "The predefined type `{0}.{1}' is not declared correctly",
ns_name, name);
return null;
}
static MemberInfo GetPredefinedMember (Type t, string name, MemberTypes mt, Location loc, params Type [] args)
{
const BindingFlags flags = instance_and_static | BindingFlags.Public | BindingFlags.DeclaredOnly;
MemberInfo [] members = MemberLookup (null, null, t, mt, flags, name, null);
if (members != null) {
for (int i = 0; i < members.Length; ++i) {
MemberInfo member = members [i];
if (mt == MemberTypes.Method || mt == MemberTypes.Constructor) {
MethodBase mb = member as MethodBase;
if (mb == null)
continue;
AParametersCollection pd = TypeManager.GetParameterData (mb);
if (IsEqual (pd.Types, args))
return member;
}
if (mt == MemberTypes.Field) {
FieldInfo fi = member as FieldInfo;
if (fi == null)
continue;
if (args.Length >= 1 && !IsEqual (TypeToCoreType (fi.FieldType), args [0]))
continue;
return member;
}
if (mt == MemberTypes.Property) {
PropertyInfo pi = member as PropertyInfo;
if (pi == null)
continue;
if (args.Length >= 1 && !IsEqual (TypeToCoreType (pi.PropertyType), args [0]))
continue;
return member;
}
}
}
string method_args = null;
if (mt == MemberTypes.Method || mt == MemberTypes.Constructor)
method_args = "(" + TypeManager.CSharpName (args) + ")";
Report.Error (656, loc, "The compiler required member `{0}.{1}{2}' could not be found or is inaccessible",
TypeManager.CSharpName (t), name, method_args);
return null;
}
//
// Returns the ConstructorInfo for "args"
//
public static ConstructorInfo GetPredefinedConstructor (Type t, Location loc, params Type [] args)
{
return (ConstructorInfo) GetPredefinedMember (t, ConstructorInfo.ConstructorName, MemberTypes.Constructor, loc, args);
}
//
// Returns the MethodInfo for a method named `name' defined
// in type `t' which takes arguments of types `args'
//
public static MethodInfo GetPredefinedMethod (Type t, string name, Location loc, params Type [] args)
{
return (MethodInfo)GetPredefinedMember (t, name, MemberTypes.Method, loc, args);
}
public static FieldInfo GetPredefinedField (Type t, string name, Location loc, params Type [] args)
{
return (FieldInfo) GetPredefinedMember (t, name, MemberTypes.Field, loc, args);
}
public static PropertyInfo GetPredefinedProperty (Type t, string name, Location loc, params Type [] args)
{
return (PropertyInfo) GetPredefinedMember (t, name, MemberTypes.Property, loc, args);
}
///
/// The types have to be initialized after the initial
/// population of the type has happened (for example, to
/// bootstrap the corlib.dll
///
public static bool InitCoreTypes ()
{
object_type = CoreLookupType ("System", "Object", Kind.Class, true);
system_object_expr.Type = object_type;
value_type = CoreLookupType ("System", "ValueType", Kind.Class, true);
system_valuetype_expr.Type = value_type;
attribute_type = CoreLookupType ("System", "Attribute", Kind.Class, true);
int32_type = CoreLookupType ("System", "Int32", Kind.Struct, true);
system_int32_expr.Type = int32_type;
int64_type = CoreLookupType ("System", "Int64", Kind.Struct, true);
system_int64_expr.Type = int64_type;
uint32_type = CoreLookupType ("System", "UInt32", Kind.Struct, true);
system_uint32_expr.Type = uint32_type;
uint64_type = CoreLookupType ("System", "UInt64", Kind.Struct, true);
system_uint64_expr.Type = uint64_type;
byte_type = CoreLookupType ("System", "Byte", Kind.Struct, true);
system_byte_expr.Type = byte_type;
sbyte_type = CoreLookupType ("System", "SByte", Kind.Struct, true);
system_sbyte_expr.Type = sbyte_type;
short_type = CoreLookupType ("System", "Int16", Kind.Struct, true);
system_int16_expr.Type = short_type;
ushort_type = CoreLookupType ("System", "UInt16", Kind.Struct, true);
system_uint16_expr.Type = ushort_type;
ienumerator_type = CoreLookupType ("System.Collections", "IEnumerator", Kind.Interface, true);
ienumerable_type = CoreLookupType ("System.Collections", "IEnumerable", Kind.Interface, true);
idisposable_type = CoreLookupType ("System", "IDisposable", Kind.Interface, true);
// HACK: DefineType immediately resolves iterators (very wrong)
generic_ienumerator_type = CoreLookupType ("System.Collections.Generic", "IEnumerator`1", Kind.Interface, false);
char_type = CoreLookupType ("System", "Char", Kind.Struct, true);
system_char_expr.Type = char_type;
string_type = CoreLookupType ("System", "String", Kind.Class, true);
system_string_expr.Type = string_type;
float_type = CoreLookupType ("System", "Single", Kind.Struct, true);
system_single_expr.Type = float_type;
double_type = CoreLookupType ("System", "Double", Kind.Struct, true);
system_double_expr.Type = double_type;
decimal_type = CoreLookupType ("System", "Decimal", Kind.Struct, true);
system_decimal_expr.Type = decimal_type;
bool_type = CoreLookupType ("System", "Boolean", Kind.Struct, true);
system_boolean_expr.Type = bool_type;
intptr_type = CoreLookupType ("System", "IntPtr", Kind.Struct, true);
system_intptr_expr.Type = intptr_type;
uintptr_type = CoreLookupType ("System", "UIntPtr", Kind.Struct, true);
multicast_delegate_type = CoreLookupType ("System", "MulticastDelegate", Kind.Class, true);
delegate_type = CoreLookupType ("System", "Delegate", Kind.Class, true);
enum_type = CoreLookupType ("System", "Enum", Kind.Class, true);
array_type = CoreLookupType ("System", "Array", Kind.Class, true);
void_type = CoreLookupType ("System", "Void", Kind.Struct, true);
system_void_expr.Type = void_type;
type_type = CoreLookupType ("System", "Type", Kind.Class, true);
exception_type = CoreLookupType ("System", "Exception", Kind.Class, true);
runtime_field_handle_type = CoreLookupType ("System", "RuntimeFieldHandle", Kind.Struct, true);
runtime_handle_type = CoreLookupType ("System", "RuntimeTypeHandle", Kind.Struct, true);
PredefinedAttributes.Get.ParamArray.Resolve (false);
PredefinedAttributes.Get.Out.Resolve (false);
return Report.Errors == 0;
}
//
// Initializes optional core types
//
public static void InitOptionalCoreTypes ()
{
//
// These are only used for compare purposes
//
null_type = typeof (NullLiteral);
void_ptr_type = GetPointerType (void_type);
//
// Initialize InternalsVisibleTo as the very first optional type. Otherwise we would populate
// types cache with incorrect accessiblity when any of optional types is internal.
//
PredefinedAttributes.Get.Initialize ();
runtime_argument_handle_type = CoreLookupType ("System", "RuntimeArgumentHandle", Kind.Struct, false);
asynccallback_type = CoreLookupType ("System", "AsyncCallback", Kind.Delegate, false);
iasyncresult_type = CoreLookupType ("System", "IAsyncResult", Kind.Interface, false);
typed_reference_type = CoreLookupType ("System", "TypedReference", Kind.Struct, false);
arg_iterator_type = CoreLookupType ("System", "ArgIterator", Kind.Struct, false);
mbr_type = CoreLookupType ("System", "MarshalByRefObject", Kind.Class, false);
//
// Optional attributes, used for error reporting only
//
//if (PredefinedAttributes.Get.Obsolete.IsDefined) {
// Class c = TypeManager.LookupClass (PredefinedAttributes.Get.Obsolete.Type);
// if (c != null)
// c.Define ();
//}
generic_ilist_type = CoreLookupType ("System.Collections.Generic", "IList`1", Kind.Interface, false);
generic_icollection_type = CoreLookupType ("System.Collections.Generic", "ICollection`1", Kind.Interface, false);
generic_ienumerable_type = CoreLookupType ("System.Collections.Generic", "IEnumerable`1", Kind.Interface, false);
generic_nullable_type = CoreLookupType ("System", "Nullable`1", Kind.Struct, false);
//
// Optional types which are used as types and for member lookup
//
runtime_helpers_type = CoreLookupType ("System.Runtime.CompilerServices", "RuntimeHelpers", Kind.Class, false);
// New in .NET 3.5
// Note: extension_attribute_type is already loaded
expression_type = CoreLookupType ("System.Linq.Expressions", "Expression`1", Kind.Class, false);
if (!RootContext.StdLib) {
//
// HACK: When building Mono corlib mcs uses loaded mscorlib which
// has different predefined types and this method sets mscorlib types
// to be same to avoid any type check errors.
//
Type type = typeof (Type);
Type [] system_4_type_arg = { type, type, type, type };
MethodInfo set_corlib_type_builders =
typeof (System.Reflection.Emit.AssemblyBuilder).GetMethod (
"SetCorlibTypeBuilders", BindingFlags.NonPublic | BindingFlags.Instance, null,
system_4_type_arg, null);
if (set_corlib_type_builders != null) {
object[] args = new object [4];
args [0] = object_type;
args [1] = value_type;
args [2] = enum_type;
args [3] = void_type;
set_corlib_type_builders.Invoke (CodeGen.Assembly.Builder, args);
} else {
Report.Warning (-26, 3, "The compilation may fail due to missing `{0}.SetCorlibTypeBuilders({1})' method",
TypeManager.CSharpName (typeof (System.Reflection.Emit.AssemblyBuilder)),
TypeManager.CSharpName (system_4_type_arg));
}
}
}
const BindingFlags instance_and_static = BindingFlags.Static | BindingFlags.Instance;
///
/// This is the "old", non-cache based FindMembers() function. We cannot use
/// the cache here because there is no member name argument.
///
public static MemberList FindMembers (Type t, MemberTypes mt, BindingFlags bf,
MemberFilter filter, object criteria)
{
#if MS_COMPATIBLE && GMCS_SOURCE
if (t.IsGenericType)
t = t.GetGenericTypeDefinition ();
#endif
DeclSpace decl = (DeclSpace) builder_to_declspace [t];
//
// `builder_to_declspace' contains all dynamic types.
//
if (decl != null) {
MemberList list;
Timer.StartTimer (TimerType.FindMembers);
list = decl.FindMembers (mt, bf, filter, criteria);
Timer.StopTimer (TimerType.FindMembers);
return list;
}
//
// We have to take care of arrays specially, because GetType on
// a TypeBuilder array will return a Type, not a TypeBuilder,
// and we can not call FindMembers on this type.
//
if (
#if MS_COMPATIBLE && GMCS_SOURCE
!t.IsGenericType &&
#endif
t.IsSubclassOf (TypeManager.array_type))
return new MemberList (TypeManager.array_type.FindMembers (mt, bf, filter, criteria));
#if GMCS_SOURCE
if (t is GenericTypeParameterBuilder) {
TypeParameter tparam = (TypeParameter) builder_to_type_param [t];
Timer.StartTimer (TimerType.FindMembers);
MemberList list = tparam.FindMembers (
mt, bf | BindingFlags.DeclaredOnly, filter, criteria);
Timer.StopTimer (TimerType.FindMembers);
return list;
}
#endif
//
// Since FindMembers will not lookup both static and instance
// members, we emulate this behaviour here.
//
if ((bf & instance_and_static) == instance_and_static){
MemberInfo [] i_members = t.FindMembers (
mt, bf & ~BindingFlags.Static, filter, criteria);
int i_len = i_members.Length;
if (i_len == 1){
MemberInfo one = i_members [0];
//
// If any of these are present, we are done!
//
if ((one is Type) || (one is EventInfo) || (one is FieldInfo))
return new MemberList (i_members);
}
MemberInfo [] s_members = t.FindMembers (
mt, bf & ~BindingFlags.Instance, filter, criteria);
int s_len = s_members.Length;
if (i_len > 0 || s_len > 0)
return new MemberList (i_members, s_members);
else {
if (i_len > 0)
return new MemberList (i_members);
else
return new MemberList (s_members);
}
}
return new MemberList (t.FindMembers (mt, bf, filter, criteria));
}
///
/// This method is only called from within MemberLookup. It tries to use the member
/// cache if possible and falls back to the normal FindMembers if not. The `used_cache'
/// flag tells the caller whether we used the cache or not. If we used the cache, then
/// our return value will already contain all inherited members and the caller don't need
/// to check base classes and interfaces anymore.
///
private static MemberInfo [] MemberLookup_FindMembers (Type t, MemberTypes mt, BindingFlags bf,
string name, out bool used_cache)
{
MemberCache cache;
//
// If this is a dynamic type, it's always in the `builder_to_declspace' hash table
// and we can ask the DeclSpace for the MemberCache.
//
#if MS_COMPATIBLE
if (t.Assembly == CodeGen.Assembly.Builder) {
if (t.IsGenericParameter) {
TypeParameter tparam = (TypeParameter) builder_to_type_param[t];
used_cache = true;
if (tparam.MemberCache == null)
return new MemberInfo[0];
return tparam.MemberCache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
//
// We have to take care of arrays specially, because GetType on
// a TypeBuilder array will return a Type, not a TypeBuilder,
// and we can not call FindMembers on this type.
//
if (t.IsArray) {
used_cache = true;
return TypeHandle.ArrayType.MemberCache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
if (t.IsGenericType && !t.IsGenericTypeDefinition)
t = t.GetGenericTypeDefinition ();
#else
if (t is TypeBuilder) {
#endif
DeclSpace decl = (DeclSpace) builder_to_declspace [t];
cache = decl.MemberCache;
//
// If this DeclSpace has a MemberCache, use it.
//
if (cache != null) {
used_cache = true;
return cache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
// If there is no MemberCache, we need to use the "normal" FindMembers.
// Note, this is a VERY uncommon route!
MemberList list;
Timer.StartTimer (TimerType.FindMembers);
list = decl.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
FilterWithClosure_delegate, name);
Timer.StopTimer (TimerType.FindMembers);
used_cache = false;
return (MemberInfo []) list;
}
//
// We have to take care of arrays specially, because GetType on
// a TypeBuilder array will return a Type, not a TypeBuilder,
// and we can not call FindMembers on this type.
//
if (t.IsArray) {
used_cache = true;
return TypeHandle.ArrayType.MemberCache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
#if GMCS_SOURCE
if (t is GenericTypeParameterBuilder) {
TypeParameter tparam = (TypeParameter) builder_to_type_param [t];
used_cache = true;
if (tparam.MemberCache == null)
return new MemberInfo [0];
return tparam.MemberCache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
#endif
if (IsGenericType (t) && (mt == MemberTypes.NestedType)) {
//
// This happens if we're resolving a class'es base class and interfaces
// in TypeContainer.DefineType(). At this time, the types aren't
// populated yet, so we can't use the cache.
//
MemberInfo[] info = t.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
FilterWithClosure_delegate, name);
used_cache = false;
return info;
}
//
// This call will always succeed. There is exactly one TypeHandle instance per
// type, TypeHandle.GetMemberCache() will, if necessary, create a new one, and return
// the corresponding MemberCache.
//
cache = TypeHandle.GetMemberCache (t);
used_cache = true;
return cache.FindMembers (mt, bf, name, FilterWithClosure_delegate, null);
}
public static bool IsBuiltinType (Type t)
{
t = TypeToCoreType (t);
if (t == object_type || t == string_type || t == int32_type || t == uint32_type ||
t == int64_type || t == uint64_type || t == float_type || t == double_type ||
t == char_type || t == short_type || t == decimal_type || t == bool_type ||
t == sbyte_type || t == byte_type || t == ushort_type || t == void_type)
return true;
else
return false;
}
//
// This is like IsBuiltinType, but lacks decimal_type, we should also clean up
// the pieces in the code where we use IsBuiltinType and special case decimal_type.
//
public static bool IsPrimitiveType (Type t)
{
return (t == int32_type || t == uint32_type ||
t == int64_type || t == uint64_type || t == float_type || t == double_type ||
t == char_type || t == short_type || t == bool_type ||
t == sbyte_type || t == byte_type || t == ushort_type);
}
public static bool IsDelegateType (Type t)
{
if (TypeManager.IsGenericParameter (t))
return false;
if (t == TypeManager.delegate_type || t == TypeManager.multicast_delegate_type)
return false;
t = DropGenericTypeArguments (t);
return IsSubclassOf (t, TypeManager.delegate_type);
}
//
// Is a type of dynamic type
//
public static bool IsDynamicType (Type t)
{
if (t == InternalType.Dynamic)
return true;
if (t != object_type)
return false;
if (t.Module == RootContext.ToplevelTypes.Builder)
return false;
PredefinedAttribute pa = PredefinedAttributes.Get.Dynamic;
if (pa == null)
return false;
object[] res = t.GetCustomAttributes (pa.Type, false);
return res != null && res.Length != 0;
}
public static bool IsEnumType (Type t)
{
t = DropGenericTypeArguments (t);
return t.BaseType == TypeManager.enum_type;
}
public static bool IsBuiltinOrEnum (Type t)
{
if (IsBuiltinType (t))
return true;
if (IsEnumType (t))
return true;
return false;
}
public static bool IsAttributeType (Type t)
{
return t == attribute_type && t.BaseType != null || IsSubclassOf (t, attribute_type);
}
//
// Whether a type is unmanaged. This is used by the unsafe code (25.2)
//
// mcs4: delete, DeclSpace.IsUnmanagedType is replacement
public static bool IsUnmanagedType (Type t)
{
DeclSpace ds = TypeManager.LookupDeclSpace (t);
if (ds != null)
return ds.IsUnmanagedType ();
// builtins that are not unmanaged types
if (t == TypeManager.object_type || t == TypeManager.string_type)
return false;
if (IsGenericType (t) || IsGenericParameter (t))
return false;
if (IsBuiltinOrEnum (t))
return true;
// Someone did the work of checking if the ElementType of t is unmanaged. Let's not repeat it.
if (t.IsPointer)
return IsUnmanagedType (GetElementType (t));
// Arrays are disallowed, even if we mark them with [MarshalAs(UnmanagedType.ByValArray, ...)]
if (t.IsArray)
return false;
if (!IsValueType (t))
return false;
for (Type p = t.DeclaringType; p != null; p = p.DeclaringType) {
if (IsGenericTypeDefinition (p))
return false;
}
bool retval = true;
{
FieldInfo [] fields = t.GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
foreach (FieldInfo f in fields){
if (!IsUnmanagedType (f.FieldType)){
retval = false;
}
}
}
return retval;
}
//
// Null is considered to be a reference type
//
public static bool IsReferenceType (Type t)
{
if (TypeManager.IsGenericParameter (t)) {
GenericConstraints constraints = TypeManager.GetTypeParameterConstraints (t);
if (constraints == null)
return false;
return constraints.IsReferenceType;
}
return !IsStruct (t) && !IsEnumType (t);
}
public static bool IsValueType (Type t)
{
if (TypeManager.IsGenericParameter (t)) {
GenericConstraints constraints = TypeManager.GetTypeParameterConstraints (t);
if (constraints == null)
return false;
return constraints.IsValueType;
}
return IsStruct (t) || IsEnumType (t);
}
public static bool IsStruct (Type t)
{
return t.BaseType == value_type && t != enum_type && t.IsSealed;
}
public static bool IsInterfaceType (Type t)
{
TypeContainer tc = (TypeContainer) builder_to_declspace [t];
if (tc == null)
return false;
return tc.Kind == Kind.Interface;
}
public static bool IsSubclassOf (Type type, Type base_type)
{
TypeParameter tparam = LookupTypeParameter (type);
TypeParameter pparam = LookupTypeParameter (base_type);
if ((tparam != null) && (pparam != null)) {
if (tparam == pparam)
return true;
return tparam.IsSubclassOf (base_type);
}
#if MS_COMPATIBLE && GMCS_SOURCE
if (type.IsGenericType)
type = type.GetGenericTypeDefinition ();
#endif
if (type.IsSubclassOf (base_type))
return true;
do {
if (IsEqual (type, base_type))
return true;
type = type.BaseType;
} while (type != null);
return false;
}
public static bool IsPrivateAccessible (Type type, Type parent)
{
if (type == null)
return false;
if (type.Equals (parent))
return true;
return DropGenericTypeArguments (type) == DropGenericTypeArguments (parent);
}
public static bool IsFamilyAccessible (Type type, Type parent)
{
TypeParameter tparam = LookupTypeParameter (type);
TypeParameter pparam = LookupTypeParameter (parent);
if ((tparam != null) && (pparam != null)) {
if (tparam == pparam)
return true;
return tparam.IsSubclassOf (parent);
}
do {
if (IsInstantiationOfSameGenericType (type, parent))
return true;
type = type.BaseType;
} while (type != null);
return false;
}
//
// Checks whether `type' is a subclass or nested child of `base_type'.
//
public static bool IsNestedFamilyAccessible (Type type, Type base_type)
{
do {
if (IsFamilyAccessible (type, base_type))
return true;
// Handle nested types.
type = type.DeclaringType;
} while (type != null);
return false;
}
//
// Checks whether `type' is a nested child of `parent'.
//
public static bool IsNestedChildOf (Type type, Type parent)
{
if (type == null)
return false;
type = DropGenericTypeArguments (type);
parent = DropGenericTypeArguments (parent);
if (IsEqual (type, parent))
return false;
type = type.DeclaringType;
while (type != null) {
if (IsEqual (type, parent))
return true;
type = type.DeclaringType;
}
return false;
}
public static bool IsSpecialType (Type t)
{
return t == arg_iterator_type || t == typed_reference_type;
}
//
// Checks whether `extern_type' is friend of the output assembly
//
public static bool IsThisOrFriendAssembly (Assembly assembly)
{
if (assembly == CodeGen.Assembly.Builder)
return true;
if (assembly_internals_vis_attrs.Contains (assembly))
return (bool)(assembly_internals_vis_attrs [assembly]);
PredefinedAttribute pa = PredefinedAttributes.Get.InternalsVisibleTo;
// HACK: Do very early resolve of SRE type checking
if (pa.Type == null)
pa.Resolve (true);
if (!pa.IsDefined)
return false;
object [] attrs = assembly.GetCustomAttributes (pa.Type, false);
if (attrs.Length == 0) {
assembly_internals_vis_attrs.Add (assembly, false);
return false;
}
bool is_friend = false;
AssemblyName this_name = CodeGen.Assembly.Name;
byte [] this_token = this_name.GetPublicKeyToken ();
foreach (InternalsVisibleToAttribute attr in attrs) {
if (attr.AssemblyName == null || attr.AssemblyName.Length == 0)
continue;
AssemblyName aname = null;
try {
#if GMCS_SOURCE
aname = new AssemblyName (attr.AssemblyName);
#else
throw new NotSupportedException ();
#endif
} catch (FileLoadException) {
} catch (ArgumentException) {
}
if (aname == null || aname.Name != this_name.Name)
continue;
byte [] key_token = aname.GetPublicKeyToken ();
if (key_token != null) {
if (this_token.Length == 0) {
// Same name, but assembly is not strongnamed
Error_FriendAccessNameNotMatching (aname.FullName);
break;
}
if (!CompareKeyTokens (this_token, key_token))
continue;
}
is_friend = true;
break;
}
assembly_internals_vis_attrs.Add (assembly, is_friend);
return is_friend;
}
static bool CompareKeyTokens (byte [] token1, byte [] token2)
{
for (int i = 0; i < token1.Length; i++)
if (token1 [i] != token2 [i])
return false;
return true;
}
static void Error_FriendAccessNameNotMatching (string other_name)
{
Report.Error (281,
"Friend access was granted to `{0}', but the output assembly is named `{1}'. Try adding a reference to `{0}' or change the output assembly name to match it",
other_name, CodeGen.Assembly.Name.FullName);
}
//
// Do the right thing when returning the element type of an
// array type based on whether we are compiling corlib or not
//
public static Type GetElementType (Type t)
{
if (RootContext.StdLib)
return t.GetElementType ();
else
return TypeToCoreType (t.GetElementType ());
}
///
/// This method is not implemented by MS runtime for dynamic types
///
public static bool HasElementType (Type t)
{
return t.IsArray || t.IsPointer || t.IsByRef;
}
public static Type GetEnumUnderlyingType (Type t)
{
t = DropGenericTypeArguments (t);
Enum e = LookupTypeContainer (t) as Enum;
if (e != null)
return e.UnderlyingType;
// TODO: cache it ?
FieldInfo fi = GetPredefinedField (t, Enum.UnderlyingValueField, Location.Null, Type.EmptyTypes);
if (fi == null)
return TypeManager.int32_type;
return TypeToCoreType (fi.FieldType);
}
///
/// Gigantic work around for missing features in System.Reflection.Emit follows.
///
///
///
/// Since System.Reflection.Emit can not return MethodBase.GetParameters
/// for anything which is dynamic, and we need this in a number of places,
/// we register this information here, and use it afterwards.
///
static public void RegisterMethod (MethodBase mb, AParametersCollection ip)
{
method_params.Add (mb, ip);
}
static public void RegisterIndexer (PropertyBuilder pb, AParametersCollection p)
{
method_params.Add (pb, p);
}
static public AParametersCollection GetParameterData (MethodBase mb)
{
AParametersCollection pd = (AParametersCollection) method_params [mb];
if (pd == null) {
#if MS_COMPATIBLE
if (mb.IsGenericMethod && !mb.IsGenericMethodDefinition) {
MethodInfo mi = ((MethodInfo) mb).GetGenericMethodDefinition ();
pd = GetParameterData (mi);
/*
if (mi.IsGenericMethod)
pd = pd.InflateTypes (mi.GetGenericArguments (), mb.GetGenericArguments ());
else
pd = pd.InflateTypes (mi.DeclaringType.GetGenericArguments (), mb.GetGenericArguments ());
*/
method_params.Add (mb, pd);
return pd;
}
if (mb.DeclaringType.Assembly == CodeGen.Assembly.Builder) {
throw new InternalErrorException ("Parameters are not registered for method `{0}'",
TypeManager.CSharpName (mb.DeclaringType) + "." + mb.Name);
}
pd = ParametersImported.Create (mb);
#else
MethodBase generic = TypeManager.DropGenericMethodArguments (mb);
if (generic != mb) {
pd = TypeManager.GetParameterData (generic);
pd = ParametersImported.Create (pd, mb);
} else {
pd = ParametersImported.Create (mb);
}
#endif
method_params.Add (mb, pd);
}
return pd;
}
public static AParametersCollection GetParameterData (PropertyInfo pi)
{
AParametersCollection pd = (AParametersCollection)method_params [pi];
if (pd == null) {
if (pi is PropertyBuilder)
return ParametersCompiled.EmptyReadOnlyParameters;
ParameterInfo [] p = pi.GetIndexParameters ();
if (p == null)
return ParametersCompiled.EmptyReadOnlyParameters;
pd = ParametersImported.Create (p, null);
method_params.Add (pi, pd);
}
return pd;
}
public static AParametersCollection GetDelegateParameters (Type t)
{
Delegate d = builder_to_declspace [t] as Delegate;
if (d != null)
return d.Parameters;
MethodInfo invoke_mb = Delegate.GetInvokeMethod (t, t);
return GetParameterData (invoke_mb);
}
static public void RegisterOverride (MethodBase override_method, MethodBase base_method)
{
if (!method_overrides.Contains (override_method))
method_overrides [override_method] = base_method;
if (method_overrides [override_method] != base_method)
throw new InternalErrorException ("Override mismatch: " + override_method);
}
static public bool IsOverride (MethodBase m)
{
m = DropGenericMethodArguments (m);
return m.IsVirtual &&
(m.Attributes & MethodAttributes.NewSlot) == 0 &&
(m is MethodBuilder || method_overrides.Contains (m));
}
static public MethodBase TryGetBaseDefinition (MethodBase m)
{
m = DropGenericMethodArguments (m);
return (MethodBase) method_overrides [m];
}
public static void RegisterConstant (FieldInfo fb, IConstant ic)
{
fields.Add (fb, ic);
}
public static IConstant GetConstant (FieldInfo fb)
{
if (fb == null)
return null;
return (IConstant)fields [fb];
}
public static void RegisterProperty (PropertyInfo pi, PropertyBase pb)
{
propertybuilder_to_property.Add (pi, pb);
}
public static PropertyBase GetProperty (PropertyInfo pi)
{
return (PropertyBase)propertybuilder_to_property [pi];
}
static public void RegisterFieldBase (FieldBuilder fb, FieldBase f)
{
fieldbuilders_to_fields.Add (fb, f);
}
//
// The return value can be null; This will be the case for
// auxiliary FieldBuilders created by the compiler that have no
// real field being declared on the source code
//
static public FieldBase GetField (FieldInfo fb)
{
#if GMCS_SOURCE
fb = GetGenericFieldDefinition (fb);
#endif
return (FieldBase) fieldbuilders_to_fields [fb];
}
static public MethodInfo GetAddMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
return ((MyEventBuilder)ei).GetAddMethod (true);
}
return ei.GetAddMethod (true);
}
static public MethodInfo GetRemoveMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
return ((MyEventBuilder)ei).GetRemoveMethod (true);
}
return ei.GetRemoveMethod (true);
}
static public void RegisterEventField (EventInfo einfo, EventField e)
{
if (events == null)
events = new Hashtable ();
events.Add (einfo, e);
}
static public EventField GetEventField (EventInfo ei)
{
if (events == null)
return null;
return (EventField) events [ei];
}
public static bool CheckStructCycles (TypeContainer tc, Hashtable seen)
{
Hashtable hash = new Hashtable ();
return CheckStructCycles (tc, seen, hash);
}
public static bool CheckStructCycles (TypeContainer tc, Hashtable seen,
Hashtable hash)
{
if ((tc.Kind != Kind.Struct) || IsBuiltinType (tc.TypeBuilder))
return true;
//
// `seen' contains all types we've already visited.
//
if (seen.Contains (tc))
return true;
seen.Add (tc, null);
if (tc.Fields == null)
return true;
foreach (FieldBase field in tc.Fields) {
if (field.FieldBuilder == null || field.FieldBuilder.IsStatic)
continue;
Type ftype = field.FieldBuilder.FieldType;
TypeContainer ftc = LookupTypeContainer (ftype);
if (ftc == null)
continue;
if (hash.Contains (ftc)) {
Report.Error (523, tc.Location,
"Struct member `{0}.{1}' of type `{2}' " +
"causes a cycle in the struct layout",
tc.Name, field.Name, ftc.Name);
return false;
}
//
// `hash' contains all types in the current path.
//
hash.Add (tc, null);
bool ok = CheckStructCycles (ftc, seen, hash);
hash.Remove (tc);
if (!ok)
return false;
if (!seen.Contains (ftc))
seen.Add (ftc, null);
}
return true;
}
///
/// Given an array of interface types, expand and eliminate repeated ocurrences
/// of an interface.
///
///
///
/// This expands in context like: IA; IB : IA; IC : IA, IB; the interface "IC" to
/// be IA, IB, IC.
///
public static Type[] ExpandInterfaces (TypeExpr [] base_interfaces)
{
ArrayList new_ifaces = new ArrayList ();
foreach (TypeExpr iface in base_interfaces){
Type itype = iface.Type;
if (new_ifaces.Contains (itype))
continue;
new_ifaces.Add (itype);
Type [] implementing = GetInterfaces (itype);
foreach (Type imp in implementing){
if (!new_ifaces.Contains (imp))
new_ifaces.Add (imp);
}
}
Type [] ret = new Type [new_ifaces.Count];
new_ifaces.CopyTo (ret, 0);
return ret;
}
public static Type[] ExpandInterfaces (Type [] base_interfaces)
{
ArrayList new_ifaces = new ArrayList ();
foreach (Type itype in base_interfaces){
if (new_ifaces.Contains (itype))
continue;
new_ifaces.Add (itype);
Type [] implementing = GetInterfaces (itype);
foreach (Type imp in implementing){
if (!new_ifaces.Contains (imp))
new_ifaces.Add (imp);
}
}
Type [] ret = new Type [new_ifaces.Count];
new_ifaces.CopyTo (ret, 0);
return ret;
}
static PtrHashtable iface_cache;
///
/// This function returns the interfaces in the type `t'. Works with
/// both types and TypeBuilders.
///
public static Type [] GetInterfaces (Type t)
{
Type [] cached = iface_cache [t] as Type [];
if (cached != null)
return cached;
//
// The reason for catching the Array case is that Reflection.Emit
// will not return a TypeBuilder for Array types of TypeBuilder types,
// but will still throw an exception if we try to call GetInterfaces
// on the type.
//
// Since the array interfaces are always constant, we return those for
// the System.Array
//
if (t.IsArray)
t = TypeManager.array_type;
if ((t is TypeBuilder) || IsGenericType (t)) {
Type [] base_ifaces;
if (t.BaseType == null)
base_ifaces = Type.EmptyTypes;
else
base_ifaces = GetInterfaces (t.BaseType);
Type[] type_ifaces;
if (IsGenericType (t))
#if MS_COMPATIBLE && GMCS_SOURCE
type_ifaces = t.GetGenericTypeDefinition().GetInterfaces ();
#else
type_ifaces = t.GetInterfaces ();
#endif
else
type_ifaces = (Type []) builder_to_ifaces [t];
if (type_ifaces == null || type_ifaces.Length == 0)
type_ifaces = Type.EmptyTypes;
int base_count = base_ifaces.Length;
Type [] result = new Type [base_count + type_ifaces.Length];
base_ifaces.CopyTo (result, 0);
type_ifaces.CopyTo (result, base_count);
iface_cache [t] = result;
return result;
} else if (t is GenericTypeParameterBuilder){
Type[] type_ifaces = (Type []) builder_to_ifaces [t];
if (type_ifaces == null || type_ifaces.Length == 0)
type_ifaces = Type.EmptyTypes;
iface_cache [t] = type_ifaces;
return type_ifaces;
} else {
Type[] ifaces = t.GetInterfaces ();
iface_cache [t] = ifaces;
return ifaces;
}
}
//
// gets the interfaces that are declared explicitly on t
//
public static Type [] GetExplicitInterfaces (TypeBuilder t)
{
return (Type []) builder_to_ifaces [t];
}
///
/// The following is used to check if a given type implements an interface.
/// The cache helps us reduce the expense of hitting Type.GetInterfaces everytime.
///
public static bool ImplementsInterface (Type t, Type iface)
{
Type [] interfaces;
//
// FIXME OPTIMIZATION:
// as soon as we hit a non-TypeBuiler in the interface
// chain, we could return, as the `Type.GetInterfaces'
// will return all the interfaces implement by the type
// or its bases.
//
do {
interfaces = GetInterfaces (t);
if (interfaces != null){
foreach (Type i in interfaces){
if (i == iface || IsVariantOf (i, iface))
return true;
}
}
t = t.BaseType;
} while (t != null);
return false;
}
static NumberFormatInfo nf_provider = CultureInfo.CurrentCulture.NumberFormat;
// This is a custom version of Convert.ChangeType() which works
// with the TypeBuilder defined types when compiling corlib.
public static object ChangeType (object value, Type conversionType, out bool error)
{
IConvertible convert_value = value as IConvertible;
if (convert_value == null){
error = true;
return null;
}
//
// NOTE 1:
// We must use Type.Equals() here since `conversionType' is
// the TypeBuilder created version of a system type and not
// the system type itself. You cannot use Type.GetTypeCode()
// on such a type - it'd always return TypeCode.Object.
//
// NOTE 2:
// We cannot rely on build-in type conversions as they are
// more limited than what C# supports.
// See char -> float/decimal/double conversion
//
error = false;
try {
if (conversionType.Equals (typeof (Boolean)))
return (object)(convert_value.ToBoolean (nf_provider));
if (conversionType.Equals (typeof (Byte)))
return (object)(convert_value.ToByte (nf_provider));
if (conversionType.Equals (typeof (Char)))
return (object)(convert_value.ToChar (nf_provider));
if (conversionType.Equals (typeof (DateTime)))
return (object)(convert_value.ToDateTime (nf_provider));
if (conversionType.Equals (decimal_type)) {
if (convert_value.GetType () == TypeManager.char_type)
return (decimal)convert_value.ToInt32 (nf_provider);
return convert_value.ToDecimal (nf_provider);
}
if (conversionType.Equals (typeof (Double))) {
if (convert_value.GetType () == TypeManager.char_type)
return (double)convert_value.ToInt32 (nf_provider);
return convert_value.ToDouble (nf_provider);
}
if (conversionType.Equals (typeof (Int16)))
return (object)(convert_value.ToInt16 (nf_provider));
if (conversionType.Equals (int32_type))
return (object)(convert_value.ToInt32 (nf_provider));
if (conversionType.Equals (int64_type))
return (object)(convert_value.ToInt64 (nf_provider));
if (conversionType.Equals (typeof (SByte)))
return (object)(convert_value.ToSByte (nf_provider));
if (conversionType.Equals (typeof (Single))) {
if (convert_value.GetType () == TypeManager.char_type)
return (float)convert_value.ToInt32 (nf_provider);
return convert_value.ToSingle (nf_provider);
}
if (conversionType.Equals (typeof (String)))
return (object)(convert_value.ToString (nf_provider));
if (conversionType.Equals (typeof (UInt16)))
return (object)(convert_value.ToUInt16 (nf_provider));
if (conversionType.Equals (typeof (UInt32)))
return (object)(convert_value.ToUInt32 (nf_provider));
if (conversionType.Equals (typeof (UInt64)))
return (object)(convert_value.ToUInt64 (nf_provider));
if (conversionType.Equals (typeof (Object)))
return (object)(value);
else
error = true;
} catch {
error = true;
}
return null;
}
//
// When compiling with -nostdlib and the type is imported from an external assembly
// SRE uses "wrong" type and we have to convert it to the right compiler instance.
//
public static Type TypeToCoreType (Type t)
{
if (RootContext.StdLib || t.Module != typeof (object).Module)
return t;
TypeCode tc = Type.GetTypeCode (t);
switch (tc){
case TypeCode.Boolean:
return TypeManager.bool_type;
case TypeCode.Byte:
return TypeManager.byte_type;
case TypeCode.SByte:
return TypeManager.sbyte_type;
case TypeCode.Char:
return TypeManager.char_type;
case TypeCode.Int16:
return TypeManager.short_type;
case TypeCode.UInt16:
return TypeManager.ushort_type;
case TypeCode.Int32:
return TypeManager.int32_type;
case TypeCode.UInt32:
return TypeManager.uint32_type;
case TypeCode.Int64:
return TypeManager.int64_type;
case TypeCode.UInt64:
return TypeManager.uint64_type;
case TypeCode.Single:
return TypeManager.float_type;
case TypeCode.Double:
return TypeManager.double_type;
case TypeCode.String:
return TypeManager.string_type;
case TypeCode.Decimal:
return TypeManager.decimal_type;
}
if (t == typeof (void))
return TypeManager.void_type;
if (t == typeof (object))
return TypeManager.object_type;
if (t == typeof (System.Type))
return TypeManager.type_type;
if (t == typeof (System.IntPtr))
return TypeManager.intptr_type;
if (t == typeof (System.UIntPtr))
return TypeManager.uintptr_type;
#if GMCS_SOURCE
if (t.IsArray) {
int dim = t.GetArrayRank ();
t = GetElementType (t);
return t.MakeArrayType (dim);
}
if (t.IsByRef) {
t = GetElementType (t);
return t.MakeByRefType ();
}
if (t.IsPointer) {
t = GetElementType (t);
return t.MakePointerType ();
}
#endif
return t;
}
//
// Converts any type to reflection supported type
//
public static Type TypeToReflectionType (Type type)
{
// TODO: Very lame and painful, GetReference () is enough for mcs-cecil
return IsDynamicType (type) ? object_type : type;
}
///
/// Utility function that can be used to probe whether a type
/// is managed or not.
///
public static bool VerifyUnManaged (Type t, Location loc)
{
if (IsUnmanagedType (t))
return true;
while (t.IsPointer)
t = GetElementType (t);
Report.SymbolRelatedToPreviousError (t);
Report.Error (208, loc, "Cannot take the address of, get the size of, or declare a pointer to a managed type `{0}'",
CSharpName (t));
return false;
}
///
/// Returns the name of the indexer in a given type.
///
///
/// The default is not always `Item'. The user can change this behaviour by
/// using the IndexerNameAttribute in the container.
/// For example, the String class indexer is named `Chars' not `Item'
///
public static string IndexerPropertyName (Type t)
{
t = DropGenericTypeArguments (t);
if (t is TypeBuilder) {
TypeContainer tc = t.IsInterface ? LookupInterface (t) : LookupTypeContainer (t);
return tc == null ? TypeContainer.DefaultIndexerName : tc.IndexerName;
}
PredefinedAttribute pa = PredefinedAttributes.Get.DefaultMember;
if (pa.IsDefined) {
System.Attribute attr = System.Attribute.GetCustomAttribute (
t, pa.Type);
if (attr != null) {
DefaultMemberAttribute dma = (DefaultMemberAttribute) attr;
return dma.MemberName;
}
}
return TypeContainer.DefaultIndexerName;
}
static MethodInfo declare_local_method = null;
public static LocalBuilder DeclareLocalPinned (ILGenerator ig, Type t)
{
if (declare_local_method == null){
declare_local_method = typeof (ILGenerator).GetMethod (
"DeclareLocal",
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
null,
new Type [] { typeof (Type), typeof (bool)},
null);
if (declare_local_method == null){
Report.RuntimeMissingSupport (Location.Null, "pinned local variables");
return ig.DeclareLocal (t);
}
}
return (LocalBuilder) declare_local_method.Invoke (ig, new object [] { t, true });
}
private static bool IsSignatureEqual (Type a, Type b)
{
///
/// Consider the following example (bug #77674):
///
/// public abstract class A
/// {
/// public abstract T Foo ();
/// }
///
/// public abstract class B : A
/// {
/// public override U Foo ()
/// { return default (U); }
/// }
///
/// Here, `T' and `U' are method type parameters from different methods
/// (A.Foo and B.Foo), so both `==' and Equals() will fail.
///
/// However, since we're determining whether B.Foo() overrides A.Foo(),
/// we need to do a signature based comparision and consider them equal.
if (a == b)
return true;
#if GMCS_SOURCE
if (a.IsGenericParameter && b.IsGenericParameter &&
(a.DeclaringMethod != null) && (b.DeclaringMethod != null)) {
return a.GenericParameterPosition == b.GenericParameterPosition;
}
#endif
if (a.IsArray && b.IsArray) {
if (a.GetArrayRank () != b.GetArrayRank ())
return false;
return IsSignatureEqual (GetElementType (a), GetElementType (b));
}
if (a.IsByRef && b.IsByRef)
return IsSignatureEqual (GetElementType (a), GetElementType (b));
if (IsGenericType (a) && IsGenericType (b)) {
if (DropGenericTypeArguments (a) != DropGenericTypeArguments (b))
return false;
Type[] aargs = GetTypeArguments (a);
Type[] bargs = GetTypeArguments (b);
if (aargs.Length != bargs.Length)
return false;
for (int i = 0; i < aargs.Length; i++) {
if (!IsSignatureEqual (aargs [i], bargs [i]))
return false;
}
return true;
}
return false;
}
//
// Returns whether the array of memberinfos contains the given method
//
public static bool ArrayContainsMethod (MemberInfo [] array, MethodBase new_method, bool ignoreDeclType)
{
Type [] new_args = TypeManager.GetParameterData (new_method).Types;
foreach (MethodBase method in array) {
if (!ignoreDeclType && method.DeclaringType != new_method.DeclaringType)
continue;
if (method.Name != new_method.Name)
continue;
if (method is MethodInfo && new_method is MethodInfo &&
!IsSignatureEqual (
TypeToCoreType (((MethodInfo) method).ReturnType),
TypeToCoreType (((MethodInfo) new_method).ReturnType)))
continue;
Type [] old_args = TypeManager.GetParameterData (method).Types;
int old_count = old_args.Length;
int i;
if (new_args.Length != old_count)
continue;
for (i = 0; i < old_count; i++){
if (!IsSignatureEqual (old_args [i], new_args [i]))
break;
}
if (i != old_count)
continue;
return true;
}
return false;
}
//
// We copy methods from `new_members' into `target_list' if the signature
// for the method from in the new list does not exist in the target_list
//
// The name is assumed to be the same.
//
public static ArrayList CopyNewMethods (ArrayList target_list, IList new_members)
{
if (target_list == null){
target_list = new ArrayList ();
foreach (MemberInfo mi in new_members){
if (mi is MethodBase)
target_list.Add (mi);
}
return target_list;
}
MemberInfo [] target_array = new MemberInfo [target_list.Count];
target_list.CopyTo (target_array, 0);
foreach (MemberInfo mi in new_members){
MethodBase new_method = (MethodBase) mi;
if (!ArrayContainsMethod (target_array, new_method, true))
target_list.Add (new_method);
}
return target_list;
}
#region Generics
//
// Tracks the generic parameters.
//
static PtrHashtable builder_to_type_param;
public static void AddTypeParameter (Type t, TypeParameter tparam)
{
if (!builder_to_type_param.Contains (t))
builder_to_type_param.Add (t, tparam);
}
public static TypeParameter LookupTypeParameter (Type t)
{
return (TypeParameter) builder_to_type_param [t];
}
// This method always return false for non-generic compiler,
// while Type.IsGenericParameter is returned if it is supported.
public static bool IsGenericParameter (Type type)
{
#if GMCS_SOURCE
return type.IsGenericParameter;
#else
return false;
#endif
}
public static int GenericParameterPosition (Type type)
{
#if GMCS_SOURCE
return type.GenericParameterPosition;
#else
throw new InternalErrorException ("should not be called");
#endif
}
public static bool IsGenericType (Type type)
{
#if GMCS_SOURCE
return type.IsGenericType;
#else
return false;
#endif
}
public static bool IsGenericTypeDefinition (Type type)
{
#if GMCS_SOURCE
return type.IsGenericTypeDefinition;
#else
return false;
#endif
}
public static bool ContainsGenericParameters (Type type)
{
#if GMCS_SOURCE
return type.ContainsGenericParameters;
#else
return false;
#endif
}
public static FieldInfo GetGenericFieldDefinition (FieldInfo fi)
{
#if GMCS_SOURCE
if (fi.DeclaringType.IsGenericTypeDefinition ||
!fi.DeclaringType.IsGenericType)
return fi;
Type t = fi.DeclaringType.GetGenericTypeDefinition ();
BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
// TODO: use CodeGen.Module.Builder.ResolveField (fi.MetadataToken);
foreach (FieldInfo f in t.GetFields (bf))
if (f.MetadataToken == fi.MetadataToken)
return f;
#endif
return fi;
}
public static bool IsEqual (Type a, Type b)
{
if (a.Equals (b)) {
// MS BCL returns true even if enum types are different
if (a.BaseType == TypeManager.enum_type || b.BaseType == TypeManager.enum_type)
return a.FullName == b.FullName;
// Some types are never equal
if (a == TypeManager.null_type || a == InternalType.AnonymousMethod)
return false;
return true;
}
if (IsGenericParameter (a) && IsGenericParameter (b)) {
// TODO: needs more testing before cleaning up
//if (a.DeclaringMethod != b.DeclaringMethod &&
// (a.DeclaringMethod == null || b.DeclaringMethod == null))
// return false;
#if GMCS_SOURCE
return a.GenericParameterPosition == b.GenericParameterPosition;
#else
throw new NotSupportedException ();
#endif
}
if (a.IsArray && b.IsArray) {
if (a.GetArrayRank () != b.GetArrayRank ())
return false;
return IsEqual (GetElementType (a), GetElementType (b));
}
if (a.IsByRef && b.IsByRef)
return IsEqual (a.GetElementType (), b.GetElementType ());
if (IsGenericType (a) && IsGenericType (b)) {
Type adef = DropGenericTypeArguments (a);
Type bdef = DropGenericTypeArguments (b);
if (adef != bdef)
return false;
if (adef.IsEnum && bdef.IsEnum)
return true;
Type[] aargs = GetTypeArguments (a);
Type[] bargs = GetTypeArguments (b);
if (aargs.Length != bargs.Length)
return false;
for (int i = 0; i < aargs.Length; i++) {
if (!IsEqual (aargs [i], bargs [i]))
return false;
}
return true;
}
return false;
}
public static bool IsEqual (Type[] a, Type[] b)
{
if (a == null || b == null || a.Length != b.Length)
return false;
for (int i = 0; i < a.Length; ++i) {
if (a [i] == null || b [i] == null) {
if (a [i] == b [i])
continue;
return false;
}
if (!IsEqual (a [i], b [i]))
return false;
}
return true;
}
public static Type DropGenericTypeArguments (Type t)
{
#if GMCS_SOURCE
if (!t.IsGenericType)
return t;
// Micro-optimization: a generic typebuilder is always a generic type definition
if (t is TypeBuilder)
return t;
return t.GetGenericTypeDefinition ();
#else
return t;
#endif
}
public static MethodBase DropGenericMethodArguments (MethodBase m)
{
#if GMCS_SOURCE
if (m.IsGenericMethod)
m = ((MethodInfo) m).GetGenericMethodDefinition ();
Type t = m.DeclaringType;
if (!t.IsGenericType || t.IsGenericTypeDefinition)
return m;
t = t.GetGenericTypeDefinition ();
BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
#if MS_COMPATIBLE
// TODO: use CodeGen.Module.Builder.ResolveMethod ()
return m;
#endif
if (m is ConstructorInfo) {
foreach (ConstructorInfo c in t.GetConstructors (bf))
if (c.MetadataToken == m.MetadataToken)
return c;
} else {
foreach (MethodBase mb in t.GetMethods (bf))
if (mb.MetadataToken == m.MetadataToken)
return mb;
}
#endif
return m;
}
public static Type[] GetGenericArguments (MethodBase mi)
{
#if GMCS_SOURCE
return mi.GetGenericArguments ();
#else
return Type.EmptyTypes;
#endif
}
public static Type[] GetTypeArguments (Type t)
{
#if GMCS_SOURCE
DeclSpace tc = LookupDeclSpace (t);
if (tc != null) {
if (!tc.IsGeneric)
return Type.EmptyTypes;
TypeParameter[] tparam = tc.TypeParameters;
Type[] ret = new Type [tparam.Length];
for (int i = 0; i < tparam.Length; i++) {
ret [i] = tparam [i].Type;
if (ret [i] == null)
throw new InternalErrorException ();
}
return ret;
} else
return t.GetGenericArguments ();
#else
throw new InternalErrorException ();
#endif
}
public static GenericConstraints GetTypeParameterConstraints (Type t)
{
#if GMCS_SOURCE
if (!t.IsGenericParameter)
throw new InvalidOperationException ();
TypeParameter tparam = LookupTypeParameter (t);
if (tparam != null)
return tparam.GenericConstraints;
return ReflectionConstraints.GetConstraints (t);
#else
throw new InternalErrorException ();
#endif
}
public static bool HasGenericArguments (Type t)
{
return GetNumberOfTypeArguments (t) > 0;
}
public static int GetNumberOfTypeArguments (Type t)
{
#if GMCS_SOURCE
if (t.IsGenericParameter)
return 0;
DeclSpace tc = LookupDeclSpace (t);
if (tc != null)
return tc.IsGeneric ? tc.CountTypeParameters : 0;
else
return t.IsGenericType ? t.GetGenericArguments ().Length : 0;
#else
return 0;
#endif
}
///
/// Check whether `type' and `parent' are both instantiations of the same
/// generic type. Note that we do not check the type parameters here.
///
public static bool IsInstantiationOfSameGenericType (Type type, Type parent)
{
int tcount = GetNumberOfTypeArguments (type);
int pcount = GetNumberOfTypeArguments (parent);
if (tcount != pcount)
return false;
type = DropGenericTypeArguments (type);
parent = DropGenericTypeArguments (parent);
return type.Equals (parent);
}
///
/// Whether `mb' is a generic method definition.
///
public static bool IsGenericMethodDefinition (MethodBase mb)
{
#if GMCS_SOURCE
if (mb.DeclaringType is TypeBuilder) {
IMethodData method = (IMethodData) builder_to_method [mb];
if (method == null)
return false;
return method.GenericMethod != null;
}
return mb.IsGenericMethodDefinition;
#else
return false;
#endif
}
///
/// Whether `mb' is a generic method.
///
public static bool IsGenericMethod (MethodBase mb)
{
#if GMCS_SOURCE
return mb.IsGenericMethod;
#else
return false;
#endif
}
public static bool IsNullableType (Type t)
{
#if GMCS_SOURCE
return generic_nullable_type == DropGenericTypeArguments (t);
#else
return false;
#endif
}
#endregion
#region MemberLookup implementation
//
// Whether we allow private members in the result (since FindMembers
// uses NonPublic for both protected and private), we need to distinguish.
//
internal class Closure {
internal bool private_ok;
// Who is invoking us and which type is being queried currently.
internal Type invocation_type;
internal Type qualifier_type;
// The assembly that defines the type is that is calling us
internal Assembly invocation_assembly;
internal IList almost_match;
private bool CheckValidFamilyAccess (bool is_static, MemberInfo m)
{
if (invocation_type == null)
return false;
if (is_static && qualifier_type == null)
// It resolved from a simple name, so it should be visible.
return true;
if (IsNestedChildOf (invocation_type, m.DeclaringType))
return true;
for (Type t = invocation_type; t != null; t = t.DeclaringType) {
if (!IsFamilyAccessible (t, m.DeclaringType))
continue;
// Although a derived class can access protected members of its base class
// it cannot do so through an instance of the base class (CS1540).
// => Ancestry should be: declaring_type ->* invocation_type ->* qualified_type
if (is_static || qualifier_type == null ||
IsInstantiationOfSameGenericType (t, qualifier_type) ||
IsFamilyAccessible (qualifier_type, t))
return true;
}
if (almost_match != null)
almost_match.Add (m);
return false;
}
//
// This filter filters by name + whether it is ok to include private
// members in the search
//
internal bool Filter (MemberInfo m, object filter_criteria)
{
//
// Hack: we know that the filter criteria will always be in the
// `closure' // fields.
//
if ((filter_criteria != null) && (m.Name != (string) filter_criteria))
return false;
if (((qualifier_type == null) || (qualifier_type == invocation_type)) &&
(invocation_type != null) &&
IsPrivateAccessible (m.DeclaringType, invocation_type))
return true;
//
// Ugly: we need to find out the type of `m', and depending
// on this, tell whether we accept or not
//
if (m is MethodBase){
MethodBase mb = (MethodBase) m;
MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
if (ma == MethodAttributes.Public)
return true;
if (ma == MethodAttributes.PrivateScope)
return false;
if (ma == MethodAttributes.Private)
return private_ok ||
IsPrivateAccessible (invocation_type, m.DeclaringType) ||
IsNestedChildOf (invocation_type, m.DeclaringType);
if (TypeManager.IsThisOrFriendAssembly (mb.DeclaringType.Assembly)) {
if (ma == MethodAttributes.Assembly || ma == MethodAttributes.FamORAssem)
return true;
} else {
if (ma == MethodAttributes.Assembly || ma == MethodAttributes.FamANDAssem)
return false;
}
// Family, FamORAssem or FamANDAssem
return CheckValidFamilyAccess (mb.IsStatic, m);
}
if (m is FieldInfo){
FieldInfo fi = (FieldInfo) m;
FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
if (fa == FieldAttributes.Public)
return true;
if (fa == FieldAttributes.PrivateScope)
return false;
if (fa == FieldAttributes.Private)
return private_ok ||
IsPrivateAccessible (invocation_type, m.DeclaringType) ||
IsNestedChildOf (invocation_type, m.DeclaringType);
if (TypeManager.IsThisOrFriendAssembly (fi.DeclaringType.Assembly)) {
if ((fa == FieldAttributes.Assembly) ||
(fa == FieldAttributes.FamORAssem))
return true;
} else {
if ((fa == FieldAttributes.Assembly) ||
(fa == FieldAttributes.FamANDAssem))
return false;
}
// Family, FamORAssem or FamANDAssem
return CheckValidFamilyAccess (fi.IsStatic, m);
}
//
// EventInfos and PropertyInfos, return true because they lack
// permission information, so we need to check later on the methods.
//
return true;
}
}
static Closure closure;
static MemberFilter FilterWithClosure_delegate;
//
// Looks up a member called `name' in the `queried_type'. This lookup
// is done by code that is contained in the definition for `invocation_type'
// through a qualifier of type `qualifier_type' (or null if there is no qualifier).
//
// `invocation_type' is used to check whether we're allowed to access the requested
// member wrt its protection level.
//
// When called from MemberAccess, `qualifier_type' is the type which is used to access
// the requested member (`class B { A a = new A (); a.foo = 5; }'; here invocation_type
// is B and qualifier_type is A). This is used to do the CS1540 check.
//
// When resolving a SimpleName, `qualifier_type' is null.
//
// The `qualifier_type' is used for the CS1540 check; it's normally either null or
// the same than `queried_type' - except when we're being called from BaseAccess;
// in this case, `invocation_type' is the current type and `queried_type' the base
// type, so this'd normally trigger a CS1540.
//
// The binding flags are `bf' and the kind of members being looked up are `mt'
//
// The return value always includes private members which code in `invocation_type'
// is allowed to access (using the specified `qualifier_type' if given); only use
// BindingFlags.NonPublic to bypass the permission check.
//
// The 'almost_match' argument is used for reporting error CS1540.
//
// Returns an array of a single element for everything but Methods/Constructors
// that might return multiple matches.
//
public static MemberInfo [] MemberLookup (Type invocation_type, Type qualifier_type,
Type queried_type, MemberTypes mt,
BindingFlags original_bf, string name, IList almost_match)
{
Timer.StartTimer (TimerType.MemberLookup);
MemberInfo[] retval = RealMemberLookup (invocation_type, qualifier_type,
queried_type, mt, original_bf, name, almost_match);
Timer.StopTimer (TimerType.MemberLookup);
return retval;
}
static MemberInfo [] RealMemberLookup (Type invocation_type, Type qualifier_type,
Type queried_type, MemberTypes mt,
BindingFlags original_bf, string name, IList almost_match)
{
BindingFlags bf = original_bf;
ArrayList method_list = null;
Type current_type = queried_type;
bool searching = (original_bf & BindingFlags.DeclaredOnly) == 0;
bool skip_iface_check = true, used_cache = false;
bool always_ok_flag = invocation_type != null && IsNestedChildOf (invocation_type, queried_type);
closure.invocation_type = invocation_type;
closure.invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
closure.qualifier_type = qualifier_type;
closure.almost_match = almost_match;
// This is from the first time we find a method
// in most cases, we do not actually find a method in the base class
// so we can just ignore it, and save the arraylist allocation
MemberInfo [] first_members_list = null;
bool use_first_members_list = false;
do {
MemberInfo [] list;
//
// `NonPublic' is lame, because it includes both protected and
// private methods, so we need to control this behavior by
// explicitly tracking if a private method is ok or not.
//
// The possible cases are:
// public, private and protected (internal does not come into the
// equation)
//
if ((invocation_type != null) &&
((invocation_type == current_type) ||
IsNestedChildOf (invocation_type, current_type)) ||
always_ok_flag)
bf = original_bf | BindingFlags.NonPublic;
else
bf = original_bf;
closure.private_ok = (original_bf & BindingFlags.NonPublic) != 0;
Timer.StopTimer (TimerType.MemberLookup);
list = MemberLookup_FindMembers (current_type, mt, bf, name, out used_cache);
Timer.StartTimer (TimerType.MemberLookup);
//
// When queried for an interface type, the cache will automatically check all
// inherited members, so we don't need to do this here. However, this only
// works if we already used the cache in the first iteration of this loop.
//
// If we used the cache in any further iteration, we can still terminate the
// loop since the cache always looks in all base classes.
//
if (used_cache)
searching = false;
else
skip_iface_check = false;
if (current_type == TypeManager.object_type)
searching = false;
else {
current_type = current_type.BaseType;
//
// This happens with interfaces, they have a null
// basetype. Look members up in the Object class.
//
if (current_type == null) {
current_type = TypeManager.object_type;
searching = true;
}
}
if (list.Length == 0)
continue;
//
// Events and types are returned by both `static' and `instance'
// searches, which means that our above FindMembers will
// return two copies of the same.
//
if (list.Length == 1 && !(list [0] is MethodBase)){
return list;
}
//
// Multiple properties: we query those just to find out the indexer
// name
//
if (list [0] is PropertyInfo)
return list;
//
// We found an event: the cache lookup returns both the event and
// its private field.
//
if (list [0] is EventInfo) {
if ((list.Length == 2) && (list [1] is FieldInfo))
return new MemberInfo [] { list [0] };
return list;
}
//
// We found methods, turn the search into "method scan"
// mode.
//
if (first_members_list != null) {
if (use_first_members_list) {
method_list = CopyNewMethods (method_list, first_members_list);
use_first_members_list = false;
}
method_list = CopyNewMethods (method_list, list);
} else {
first_members_list = list;
use_first_members_list = true;
mt &= (MemberTypes.Method | MemberTypes.Constructor);
}
} while (searching);
if (use_first_members_list)
return first_members_list;
if (method_list != null && method_list.Count > 0) {
return (MemberInfo []) method_list.ToArray (typeof (MemberInfo));
}
//
// This happens if we already used the cache in the first iteration, in this case
// the cache already looked in all interfaces.
//
if (skip_iface_check)
return null;
//
// Interfaces do not list members they inherit, so we have to
// scan those.
//
if (!queried_type.IsInterface)
return null;
if (queried_type.IsArray)
queried_type = TypeManager.array_type;
Type [] ifaces = GetInterfaces (queried_type);
if (ifaces == null)
return null;
foreach (Type itype in ifaces){
MemberInfo [] x;
x = MemberLookup (null, null, itype, mt, bf, name, null);
if (x != null)
return x;
}
return null;
}
public const BindingFlags AllMembers = BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Static | BindingFlags.Instance |
BindingFlags.DeclaredOnly;
// Currently is designed to work with external types only
public static PropertyInfo GetPropertyFromAccessor (MethodBase mb)
{
if (!mb.IsSpecialName)
return null;
string name = mb.Name;
if (name.Length < 5)
return null;
if (name [3] != '_')
return null;
if (name.StartsWith ("get") || name.StartsWith ("set")) {
MemberInfo[] pi = mb.DeclaringType.FindMembers (MemberTypes.Property, AllMembers,
Type.FilterName, name.Substring (4));
if (pi == null)
return null;
// This can happen when property is indexer (it can have same name but different parameters)
foreach (PropertyInfo p in pi) {
foreach (MethodInfo p_mi in p.GetAccessors (true)) {
if (p_mi == mb || TypeManager.GetParameterData (p_mi).Equals (TypeManager.GetParameterData (mb)))
return p;
}
}
}
return null;
}
// Currently is designed to work with external types only
public static MemberInfo GetEventFromAccessor (MethodBase mb)
{
if (!mb.IsSpecialName)
return null;
string name = mb.Name;
if (name.Length < 5)
return null;
if (name.StartsWith ("add_"))
return mb.DeclaringType.GetEvent (name.Substring (4), AllMembers);
if (name.StartsWith ("remove_"))
return mb.DeclaringType.GetEvent (name.Substring (7), AllMembers);
return null;
}
// Tests whether external method is really special
public static bool IsSpecialMethod (MethodBase mb)
{
if (!mb.IsSpecialName)
return false;
IMethodData md = TypeManager.GetMethod (mb);
if (md != null)
return (md is AbstractPropertyEventMethod || md is Operator);
PropertyInfo pi = GetPropertyFromAccessor (mb);
if (pi != null)
return IsValidProperty (pi);
if (GetEventFromAccessor (mb) != null)
return true;
string name = mb.Name;
if (name.StartsWith ("op_"))
return Operator.GetName (name) != null;
return false;
}
// Tests whether imported property is valid C# property.
// TODO: It seems to me that we should do a lot of sanity tests before
// we accept property as C# property
static bool IsValidProperty (PropertyInfo pi)
{
MethodInfo get_method = pi.GetGetMethod (true);
MethodInfo set_method = pi.GetSetMethod (true);
int g_count = 0;
int s_count = 0;
if (get_method != null && set_method != null) {
g_count = get_method.GetParameters ().Length;
s_count = set_method.GetParameters ().Length;
if (g_count + 1 != s_count)
return false;
} else if (get_method != null) {
g_count = get_method.GetParameters ().Length;
} else if (set_method != null) {
s_count = set_method.GetParameters ().Length;
}
//
// DefaultMemberName and indexer name has to match to identify valid C# indexer
//
PredefinedAttribute pa = PredefinedAttributes.Get.DefaultMember;
if ((s_count > 1 || g_count > 0) && pa.IsDefined) {
object[] o = pi.DeclaringType.GetCustomAttributes (pa.Type, false);
if (o.Length == 0)
return false;
DefaultMemberAttribute dma = (DefaultMemberAttribute) o [0];
if (dma.MemberName != pi.Name)
return false;
if (get_method != null && "get_" + dma.MemberName != get_method.Name)
return false;
if (set_method != null && "set_" + dma.MemberName != set_method.Name)
return false;
}
return true;
}
#endregion
}
class InternalType
{
public static readonly Type AnonymousMethod = typeof (AnonymousMethodBody);
public static readonly Type Arglist = typeof (ArglistAccess);
public static readonly Type Dynamic = new DynamicType ();
public static readonly Type MethodGroup = typeof (MethodGroupExpr);
}
///
/// There is exactly one instance of this class per type.
///
public sealed class TypeHandle : IMemberContainer {
public readonly IMemberContainer BaseType;
readonly int id = ++next_id;
static int next_id = 0;
static TypeHandle ()
{
Reset ();
}
///
/// Lookup a TypeHandle instance for the given type. If the type doesn't have
/// a TypeHandle yet, a new instance of it is created. This static method
/// ensures that we'll only have one TypeHandle instance per type.
///
private static TypeHandle GetTypeHandle (Type t)
{
TypeHandle handle = (TypeHandle) type_hash [t];
if (handle != null)
return handle;
handle = new TypeHandle (t);
type_hash.Add (t, handle);
return handle;
}
public static MemberCache GetMemberCache (Type t)
{
return GetTypeHandle (t).MemberCache;
}
public static void CleanUp ()
{
type_hash = null;
}
public static void Reset ()
{
type_hash = new PtrHashtable ();
}
///
/// Returns the TypeHandle for TypeManager.object_type.
///
public static IMemberContainer ObjectType {
get {
if (object_type != null)
return object_type;
object_type = GetTypeHandle (TypeManager.object_type);
return object_type;
}
}
///
/// Returns the TypeHandle for TypeManager.array_type.
///
public static TypeHandle ArrayType {
get {
if (array_type != null)
return array_type;
array_type = GetTypeHandle (TypeManager.array_type);
return array_type;
}
}
private static PtrHashtable type_hash;
private static TypeHandle object_type = null;
private static TypeHandle array_type = null;
private Type type;
private string full_name;
private bool is_interface;
private MemberCache member_cache;
private MemberCache base_cache;
private TypeHandle (Type type)
{
this.type = type;
full_name = type.FullName != null ? type.FullName : type.Name;
if (type.BaseType != null) {
base_cache = TypeManager.LookupMemberCache (type.BaseType);
BaseType = base_cache.Container;
} else if (type.IsInterface)
base_cache = TypeManager.LookupBaseInterfacesCache (type);
this.is_interface = type.IsInterface || TypeManager.IsGenericParameter (type);
this.member_cache = new MemberCache (this);
}
// IMemberContainer methods
public string Name {
get {
return full_name;
}
}
public Type Type {
get {
return type;
}
}
public MemberCache BaseCache {
get {
return base_cache;
}
}
public bool IsInterface {
get {
return is_interface;
}
}
public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
{
MemberInfo [] members;
if (type is GenericTypeParameterBuilder)
return MemberList.Empty;
#if MS_COMPATIBLE
type = TypeManager.DropGenericTypeArguments (type);
#endif
if (mt == MemberTypes.Event)
members = type.GetEvents (bf | BindingFlags.DeclaredOnly);
else
members = type.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
null, null);
if (members.Length == 0)
return MemberList.Empty;
Array.Reverse (members);
return new MemberList (members);
}
// IMemberFinder methods
public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
MemberFilter filter, object criteria)
{
return new MemberList (member_cache.FindMembers (mt, bf, name, filter, criteria));
}
public MemberCache MemberCache {
get {
return member_cache;
}
}
public override string ToString ()
{
if (BaseType != null)
return "TypeHandle (" + id + "," + Name + " : " + BaseType + ")";
else
return "TypeHandle (" + id + "," + Name + ")";
}
}
}