//
// typemanager.cs: C# type manager
//
// Author: Miguel de Icaza (miguel@gnu.org)
// Ravi Pratap (ravi@ximian.com)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
//
//
//
// 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.Text.RegularExpressions;
using System.Runtime.CompilerServices;
using System.Diagnostics;
namespace Mono.CSharp {
public 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 char_ptr_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 enumeration_type;
static public Type array_type;
static public Type runtime_handle_type;
static public Type icloneable_type;
static public Type type_type;
static public Type ienumerator_type;
static public Type ienumerable_type;
static public Type idisposable_type;
static public Type iconvertible_type;
static public Type default_member_type;
static public Type iasyncresult_type;
static public Type asynccallback_type;
static public Type intptr_type;
static public Type monitor_type;
static public Type runtime_field_handle_type;
static public Type runtime_argument_handle_type;
static public Type attribute_type;
static public Type attribute_usage_type;
static public Type dllimport_type;
static public Type unverifiable_code_type;
static public Type methodimpl_attr_type;
static public Type marshal_as_attr_type;
static public Type new_constraint_attr_type;
static public Type param_array_type;
static public Type guid_attr_type;
static public Type void_ptr_type;
static public Type indexer_name_type;
static public Type exception_type;
static public Type activator_type;
static public Type invalid_operation_exception_type;
static public Type not_supported_exception_type;
static public Type obsolete_attribute_type;
static public Type conditional_attribute_type;
static public Type in_attribute_type;
static public Type cls_compliant_attribute_type;
static public Type typed_reference_type;
static public Type arg_iterator_type;
static public Type mbr_type;
static public Type struct_layout_attribute_type;
static public Type field_offset_attribute_type;
static public Type generic_ienumerator_type;
static public Type generic_ienumerable_type;
//
// An empty array of types
//
static public Type [] NoTypes;
static public TypeExpr [] NoTypeExprs;
//
// 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_asynccallback_expr;
static public TypeExpr system_iasyncresult_expr;
static public TypeExpr system_valuetype_expr;
//
// This is only used when compiling corlib
//
static public Type system_int32_type;
static public Type system_array_type;
static public Type system_type_type;
static public Type system_assemblybuilder_type;
static public MethodInfo system_int_array_get_length;
static public MethodInfo system_int_array_get_rank;
static public MethodInfo system_object_array_clone;
static public MethodInfo system_int_array_get_length_int;
static public MethodInfo system_int_array_get_lower_bound_int;
static public MethodInfo system_int_array_get_upper_bound_int;
static public MethodInfo system_void_array_copyto_array_int;
//
// Internal, not really used outside
//
static Type runtime_helpers_type;
//
// These methods are called by code generated by the compiler
//
static public MethodInfo string_concat_string_string;
static public MethodInfo string_concat_string_string_string;
static public MethodInfo string_concat_string_string_string_string;
static public MethodInfo string_concat_string_dot_dot_dot;
static public MethodInfo string_concat_object_object;
static public MethodInfo string_concat_object_object_object;
static public MethodInfo string_concat_object_dot_dot_dot;
static public MethodInfo string_isinterneted_string;
static public MethodInfo system_type_get_type_from_handle;
static public MethodInfo object_getcurrent_void;
static public MethodInfo bool_movenext_void;
static public MethodInfo ienumerable_getenumerator_void;
static public MethodInfo void_reset_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 int_getlength_int;
static public MethodInfo delegate_combine_delegate_delegate;
static public MethodInfo delegate_remove_delegate_delegate;
static public MethodInfo int_get_offset_to_string_data;
static public MethodInfo int_array_get_length;
static public MethodInfo int_array_get_rank;
static public MethodInfo object_array_clone;
static public MethodInfo int_array_get_length_int;
static public MethodInfo int_array_get_lower_bound_int;
static public MethodInfo int_array_get_upper_bound_int;
static public MethodInfo void_array_copyto_array_int;
static public MethodInfo activator_create_instance;
//
// The attribute constructors.
//
static public ConstructorInfo object_ctor;
static public ConstructorInfo cons_param_array_attribute;
static public ConstructorInfo void_decimal_ctor_five_args;
static public ConstructorInfo unverifiable_code_ctor;
static public ConstructorInfo invalid_operation_ctor;
static public ConstructorInfo default_member_ctor;
//
// Holds the Array of Assemblies that have been loaded
// (either because it is the default or the user used the
// -r command line option)
//
static Assembly [] assemblies;
//
// Keeps a list of modules. We used this to do lookups
// on the module using GetType -- needed for arrays
//
static Module [] modules;
//
// This is the type_cache from the assemblies to avoid
// hitting System.Reflection on every lookup.
//
static Hashtable types;
//
// This is used to hotld the corresponding TypeContainer objects
// since we need this in FindMembers
//
static Hashtable typecontainers;
//
// Keeps track of those types that are defined by the
// user's program
//
static ArrayList user_types;
static PtrHashtable builder_to_declspace;
//
// Tracks the interfaces implemented by typebuilders. We only
// enter those who do implement or or more interfaces
//
static PtrHashtable builder_to_ifaces;
//
// Tracks the generic parameters.
//
static PtrHashtable builder_to_type_param;
//
// Maps MethodBase.RuntimeTypeHandle to a Type array that contains
// the arguments to the method
//
static Hashtable method_arguments;
//
// Maps PropertyBuilder to a Type array that contains
// the arguments to the indexer
//
static Hashtable indexer_arguments;
//
// Maybe `method_arguments' should be replaced and only
// method_internal_params should be kept?
//
static Hashtable method_internal_params;
//
// 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 all_imported_types;
struct Signature {
public string name;
public Type [] args;
}
public static void CleanUp ()
{
// Lets get everything clean so that we can collect before generating code
assemblies = null;
modules = null;
types = null;
typecontainers = null;
user_types = null;
builder_to_declspace = null;
builder_to_ifaces = null;
method_arguments = null;
indexer_arguments = null;
method_internal_params = null;
builder_to_method = null;
builder_to_type_param = null;
fields = null;
references = null;
negative_hits = null;
builder_to_constant = null;
fieldbuilders_to_fields = null;
events = null;
priv_fields_events = null;
properties = null;
TypeHandle.CleanUp ();
}
///
/// A filter for Findmembers that uses the Signature object to
/// extract objects
///
static bool SignatureFilter (MemberInfo mi, object criteria)
{
Signature sig = (Signature) criteria;
if (!(mi is MethodBase))
return false;
if (mi.Name != sig.name)
return false;
int count = sig.args.Length;
if (mi is MethodBuilder || mi is ConstructorBuilder){
Type [] candidate_args = GetArgumentTypes ((MethodBase) mi);
if (candidate_args.Length != count)
return false;
for (int i = 0; i < count; i++)
if (candidate_args [i] != sig.args [i])
return false;
return true;
} else {
ParameterInfo [] pars = ((MethodBase) mi).GetParameters ();
if (pars.Length != count)
return false;
for (int i = 0; i < count; i++)
if (pars [i].ParameterType != sig.args [i])
return false;
return true;
}
}
// A delegate that points to the filter above.
static MemberFilter signature_filter;
//
// 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_asynccallback_expr = new TypeLookupExpression ("System.AsyncCallback");
system_iasyncresult_expr = new TypeLookupExpression ("System.IAsyncResult");
system_valuetype_expr = new TypeLookupExpression ("System.ValueType");
}
static TypeManager ()
{
assemblies = new Assembly [0];
modules = null;
user_types = new ArrayList ();
types = new Hashtable ();
typecontainers = new Hashtable ();
builder_to_declspace = new PtrHashtable ();
builder_to_method = new PtrHashtable ();
method_arguments = new PtrHashtable ();
method_internal_params = new PtrHashtable ();
indexer_arguments = new PtrHashtable ();
builder_to_ifaces = new PtrHashtable ();
builder_to_type_param = new PtrHashtable ();
NoTypes = new Type [0];
NoTypeExprs = new TypeExpr [0];
signature_filter = new MemberFilter (SignatureFilter);
InitExpressionTypes ();
}
public static void HandleDuplicate (string name, Type t)
{
Type prev = (Type) types [name];
TypeContainer tc = builder_to_declspace [prev] as TypeContainer;
if (tc != null){
//
// This probably never happens, as we catch this before
//
Report.Error (-17, "The type `" + name + "' has already been defined.");
return;
}
tc = builder_to_declspace [t] as TypeContainer;
if (tc != null){
Report.Warning (
1595, "The type `" + name + "' is defined in an existing assembly;"+
" Using the new definition from: " + tc.Location);
} else {
Report.Warning (
1595, "The type `" + name + "' is defined in an existing assembly;");
}
Report.Warning (1595, "Previously defined in: " + prev.Assembly.FullName);
types.Remove (name);
types.Add (name, t);
}
public static void AddUserType (string name, TypeBuilder t)
{
try {
types.Add (name, t);
} catch {
HandleDuplicate (name, t);
}
user_types.Add (t);
}
//
// 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 AddUserType (string name, TypeBuilder t, TypeContainer tc)
{
builder_to_declspace.Add (t, tc);
typecontainers.Add (name, tc);
AddUserType (name, t);
}
public static void AddDelegateType (string name, TypeBuilder t, Delegate del)
{
try {
types.Add (name, t);
} catch {
HandleDuplicate (name, t);
}
builder_to_declspace.Add (t, del);
}
public static void AddEnumType (string name, TypeBuilder t, Enum en)
{
try {
types.Add (name, t);
} catch {
HandleDuplicate (name, t);
}
builder_to_declspace.Add (t, en);
}
public static void AddMethod (MethodBase builder, IMethodData method)
{
builder_to_method.Add (builder, method);
}
public static IMethodData GetMethod (MethodBase builder)
{
return (IMethodData) builder_to_method [builder];
}
public static void AddTypeParameter (Type t, TypeParameter tparam)
{
if (!builder_to_type_param.Contains (t))
builder_to_type_param.Add (t, tparam);
}
///
/// 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 TypeContainer LookupGenericTypeContainer (Type t)
{
while (t.IsGenericInstance)
t = t.GetGenericTypeDefinition ();
return LookupTypeContainer (t);
}
public static IMemberContainer LookupMemberContainer (Type t)
{
if (t is TypeBuilder) {
IMemberContainer container = builder_to_declspace [t] as IMemberContainer;
if (container != null)
return container;
}
if (t is GenericTypeParameterBuilder) {
IMemberContainer container = builder_to_type_param [t] as IMemberContainer;
if (container != null)
return container;
}
return TypeHandle.GetTypeHandle (t);
}
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 Enum LookupEnum (Type t)
{
return builder_to_declspace [t] as Enum;
}
public static Class LookupClass (Type t)
{
return (Class) builder_to_declspace [t];
}
public static TypeParameter LookupTypeParameter (Type t)
{
return (TypeParameter) builder_to_type_param [t];
}
public static bool HasConstructorConstraint (Type t)
{
GenericConstraints gc = GetTypeParameterConstraints (t);
if (gc == null)
return false;
return (gc.Attributes & GenericParameterAttributes.DefaultConstructorConstraint) != 0;
}
public static GenericConstraints GetTypeParameterConstraints (Type t)
{
if (!t.IsGenericParameter)
throw new InvalidOperationException ();
TypeParameter tparam = LookupTypeParameter (t);
if (tparam != null)
return tparam.GenericConstraints;
return new ReflectionConstraints (t);
}
///
/// Registers an assembly to load types from.
///
public static void AddAssembly (Assembly a)
{
foreach (Assembly assembly in assemblies) {
if (a == assembly)
return;
}
int top = assemblies.Length;
Assembly [] n = new Assembly [top + 1];
assemblies.CopyTo (n, 0);
n [top] = a;
assemblies = n;
}
public static Assembly [] GetAssemblies ()
{
return assemblies;
}
///
/// Registers a module builder to lookup types from
///
public static void AddModule (Module mb)
{
int top = modules != null ? modules.Length : 0;
Module [] n = new Module [top + 1];
if (modules != null)
modules.CopyTo (n, 0);
n [top] = mb;
modules = n;
}
public static Module[] Modules {
get {
return modules;
}
}
static Hashtable references = new Hashtable ();
//
// Gets the reference to T version of the Type (T&)
//
public static Type GetReferenceType (Type t)
{
return t.MakeByRefType ();
}
static Hashtable pointers = new Hashtable ();
//
// Gets the pointer to T version of the Type (T*)
//
public static Type GetPointerType (Type t)
{
string tname = t.FullName + "*";
Type ret = t.Assembly.GetType (tname);
//
// If the type comes from the assembly we are building
// We need the Hashtable, because .NET 1.1 will return different instance types
// every time we call ModuleBuilder.GetType.
//
if (ret == null){
if (pointers [t] == null)
pointers [t] = CodeGen.Module.Builder.GetType (tname);
ret = (Type) pointers [t];
}
return ret;
}
//
// Low-level lookup, cache-less
//
static Type LookupTypeReflection (string name)
{
Type t;
foreach (Assembly a in assemblies){
t = a.GetType (name);
if (t == null)
continue;
do {
TypeAttributes ta = t.Attributes & TypeAttributes.VisibilityMask;
if (ta == TypeAttributes.NotPublic ||
ta == TypeAttributes.NestedPrivate ||
ta == TypeAttributes.NestedAssembly ||
ta == TypeAttributes.NestedFamANDAssem){
//
// In .NET pointers turn out to be private, even if their
// element type is not
//
if (t.IsPointer){
t = t.GetElementType ();
continue;
} else
t = null;
} else {
return t;
}
} while (t != null);
}
foreach (Module mb in modules) {
t = mb.GetType (name);
if (t != null)
return t;
}
return null;
}
static Hashtable negative_hits = new Hashtable ();
//
// This function is used when you want to avoid the lookups, and want to go
// directly to the source. This will use the cache.
//
// Notice that bypassing the cache is bad, because on Microsoft.NET runtime
// GetType ("DynamicType[]") != GetType ("DynamicType[]"), and there is no
// way to test things other than doing a fullname compare
//
public static Type LookupTypeDirect (string name)
{
Type t = (Type) types [name];
if (t != null)
return t;
t = LookupTypeReflection (name);
if (t == null)
return null;
types [name] = t;
return t;
}
static readonly char [] dot_array = { '.' };
///
/// Returns the Type associated with @name, takes care of the fact that
/// reflection expects nested types to be separated from the main type
/// with a "+" instead of a "."
///
public static Type LookupType (string name)
{
Type t;
//
// First lookup in user defined and cached values
//
t = (Type) types [name];
if (t != null)
return t;
// Two thirds of the failures are caught here.
if (negative_hits.Contains (name))
return null;
// Sadly, split takes a param array, so this ends up allocating *EVERY TIME*
string [] elements = name.Split (dot_array);
int count = elements.Length;
for (int n = 1; n <= count; n++){
string top_level_type = String.Join (".", elements, 0, n);
// One third of the failures are caught here.
if (negative_hits.Contains (top_level_type))
continue;
t = (Type) types [top_level_type];
if (t == null){
t = LookupTypeReflection (top_level_type);
if (t == null){
negative_hits [top_level_type] = null;
continue;
}
}
if (count == n){
types [name] = t;
return t;
}
//
// We know that System.Object does not have children, and since its the parent of
// all the objects, it always gets probbed for inner classes.
//
if (top_level_type == "System.Object")
return null;
string newt = top_level_type + "+" + String.Join ("+", elements, n, count - n);
//Console.WriteLine ("Looking up: " + newt + " " + name);
t = LookupTypeReflection (newt);
if (t == null)
negative_hits [name] = null;
else
types [name] = t;
return t;
}
negative_hits [name] = null;
return null;
}
///
/// Computes the namespaces that we import from the assemblies we reference.
///
public static void ComputeNamespaces ()
{
MethodInfo assembly_get_namespaces = typeof (Assembly).GetMethod ("GetNamespaces", BindingFlags.Instance|BindingFlags.NonPublic);
//
// First add the assembly namespaces
//
if (assembly_get_namespaces != null){
int count = assemblies.Length;
for (int i = 0; i < count; i++){
Assembly a = assemblies [i];
string [] namespaces = (string []) assembly_get_namespaces.Invoke (a, null);
foreach (string ns in namespaces){
if (ns == "")
continue;
Namespace.LookupNamespace (ns, true);
}
}
} else {
Hashtable cache = new Hashtable ();
cache.Add ("", null);
foreach (Assembly a in assemblies) {
foreach (Type t in a.GetExportedTypes ()) {
string ns = t.Namespace;
if (ns == null || cache.Contains (ns))
continue;
Namespace.LookupNamespace (ns, true);
cache.Add (ns, null);
}
}
}
}
///
/// Fills static table with exported types from all referenced assemblies.
/// This information is required for CLS Compliance tests.
///
public static void LoadAllImportedTypes ()
{
all_imported_types = new Hashtable ();
foreach (Assembly a in assemblies) {
foreach (Type t in a.GetExportedTypes ()) {
all_imported_types [t.FullName] = t;
}
}
}
public static bool NamespaceClash (string name, Location loc)
{
if (Namespace.LookupNamespace (name, false) == null)
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.FullName == null)
return t.Name;
return Regex.Replace (t.FullName,
@"^System\." +
@"(Int32|UInt32|Int16|UInt16|Int64|UInt64|" +
@"Single|Double|Char|Decimal|Byte|SByte|Object|" +
@"Boolean|String|Void|Null)" +
@"(\W+|\b)",
new MatchEvaluator (CSharpNameMatch));
}
static String CSharpNameMatch (Match match)
{
string s = match.Groups [1].Captures [0].Value;
return s.ToLower ().
Replace ("int32", "int").
Replace ("uint32", "uint").
Replace ("int16", "short").
Replace ("uint16", "ushort").
Replace ("int64", "long").
Replace ("uint64", "ulong").
Replace ("single", "float").
Replace ("boolean", "bool")
+ match.Groups [2].Captures [0].Value;
}
///
/// Returns the signature of the method with full namespace classification
///
static public string GetFullNameSignature (MemberInfo mi)
{
return mi.DeclaringType.FullName.Replace ('+', '.') + '.' + mi.Name;
}
static public string GetFullNameSignature (MethodBase mb)
{
string name = mb.Name;
if (name == ".ctor")
name = mb.DeclaringType.Name;
if (mb.IsSpecialName) {
if (name.StartsWith ("get_") || name.StartsWith ("set_")) {
name = name.Remove (0, 4);
}
if (name == "Item")
name = "this";
}
return mb.DeclaringType.FullName.Replace ('+', '.') + '.' + name;
}
static public string GetFullName (Type t)
{
if (t.FullName == null)
return t.Name;
string name = t.FullName.Replace ('+', '.');
DeclSpace tc = LookupDeclSpace (t);
if ((tc != null) && tc.IsGeneric) {
TypeParameter[] tparam = tc.TypeParameters;
StringBuilder sb = new StringBuilder (name);
sb.Append ("<");
for (int i = 0; i < tparam.Length; i++) {
if (i > 0)
sb.Append (",");
sb.Append (tparam [i].Name);
}
sb.Append (">");
return sb.ToString ();
} else if (t.HasGenericArguments && !t.IsGenericInstance) {
Type[] tparam = t.GetGenericArguments ();
StringBuilder sb = new StringBuilder (name);
sb.Append ("<");
for (int i = 0; i < tparam.Length; i++) {
if (i > 0)
sb.Append (",");
sb.Append (tparam [i].Name);
}
sb.Append (">");
return sb.ToString ();
}
return name;
}
///
/// Returns the signature of the property and indexer
///
static public string CSharpSignature (PropertyBuilder pb, bool is_indexer)
{
if (!is_indexer) {
return GetFullNameSignature (pb);
}
MethodBase mb = pb.GetSetMethod (true) != null ? pb.GetSetMethod (true) : pb.GetGetMethod (true);
string signature = GetFullNameSignature (mb);
string arg = TypeManager.LookupParametersByBuilder (mb).ParameterDesc (0);
return String.Format ("{0}.this[{1}]", signature.Substring (0, signature.LastIndexOf ('.')), arg);
}
///
/// Returns the signature of the method
///
static public string CSharpSignature (MethodBase mb)
{
StringBuilder sig = new StringBuilder ("(");
//
// FIXME: We should really have a single function to do
// everything instead of the following 5 line pattern
//
ParameterData iparams = LookupParametersByBuilder (mb);
if (iparams == null)
iparams = new ReflectionParameters (mb);
// Is property
if (mb.IsSpecialName && iparams.Count == 0 && !mb.IsConstructor)
return GetFullNameSignature (mb);
for (int i = 0; i < iparams.Count; i++) {
if (i > 0) {
sig.Append (", ");
}
sig.Append (iparams.ParameterDesc (i));
}
sig.Append (")");
// Is indexer
if (mb.IsSpecialName && iparams.Count == 1 && !mb.IsConstructor) {
sig.Replace ('(', '[');
sig.Replace (')', ']');
}
return GetFullNameSignature (mb) + sig.ToString ();
}
///
/// Looks up a type, and aborts if it is not found. This is used
/// by types required by the compiler
///
static Type CoreLookupType (string name)
{
Type t = LookupTypeDirect (name);
if (t == null){
Report.Error (518, "The predefined type `" + name + "' is not defined or imported");
Environment.Exit (1);
}
return t;
}
///
/// Returns the MethodInfo for a method named `name' defined
/// in type `t' which takes arguments of types `args'
///
static MethodInfo GetMethod (Type t, string name, Type [] args, bool is_private, bool report_errors)
{
MemberList list;
Signature sig;
BindingFlags flags = instance_and_static | BindingFlags.Public;
sig.name = name;
sig.args = args;
if (is_private)
flags |= BindingFlags.NonPublic;
list = FindMembers (t, MemberTypes.Method, flags, signature_filter, sig);
if (list.Count == 0) {
if (report_errors)
Report.Error (-19, "Can not find the core function `" + name + "'");
return null;
}
MethodInfo mi = list [0] as MethodInfo;
if (mi == null) {
if (report_errors)
Report.Error (-19, "Can not find the core function `" + name + "'");
return null;
}
return mi;
}
static MethodInfo GetMethod (Type t, string name, Type [] args, bool report_errors)
{
return GetMethod (t, name, args, false, report_errors);
}
static MethodInfo GetMethod (Type t, string name, Type [] args)
{
return GetMethod (t, name, args, true);
}
///
/// Returns the ConstructorInfo for "args"
///
static ConstructorInfo GetConstructor (Type t, Type [] args)
{
MemberList list;
Signature sig;
sig.name = ".ctor";
sig.args = args;
list = FindMembers (t, MemberTypes.Constructor,
instance_and_static | BindingFlags.Public | BindingFlags.DeclaredOnly,
signature_filter, sig);
if (list.Count == 0){
Report.Error (-19, "Can not find the core constructor for type `" + t.Name + "'");
return null;
}
ConstructorInfo ci = list [0] as ConstructorInfo;
if (ci == null){
Report.Error (-19, "Can not find the core constructor for type `" + t.Name + "'");
return null;
}
return ci;
}
public static void InitEnumUnderlyingTypes ()
{
int32_type = CoreLookupType ("System.Int32");
int64_type = CoreLookupType ("System.Int64");
uint32_type = CoreLookupType ("System.UInt32");
uint64_type = CoreLookupType ("System.UInt64");
byte_type = CoreLookupType ("System.Byte");
sbyte_type = CoreLookupType ("System.SByte");
short_type = CoreLookupType ("System.Int16");
ushort_type = CoreLookupType ("System.UInt16");
}
///
/// The types have to be initialized after the initial
/// population of the type has happened (for example, to
/// bootstrap the corlib.dll
///
public static void InitCoreTypes ()
{
object_type = CoreLookupType ("System.Object");
value_type = CoreLookupType ("System.ValueType");
InitEnumUnderlyingTypes ();
char_type = CoreLookupType ("System.Char");
string_type = CoreLookupType ("System.String");
float_type = CoreLookupType ("System.Single");
double_type = CoreLookupType ("System.Double");
char_ptr_type = CoreLookupType ("System.Char*");
decimal_type = CoreLookupType ("System.Decimal");
bool_type = CoreLookupType ("System.Boolean");
enum_type = CoreLookupType ("System.Enum");
multicast_delegate_type = CoreLookupType ("System.MulticastDelegate");
delegate_type = CoreLookupType ("System.Delegate");
array_type = CoreLookupType ("System.Array");
void_type = CoreLookupType ("System.Void");
type_type = CoreLookupType ("System.Type");
runtime_field_handle_type = CoreLookupType ("System.RuntimeFieldHandle");
runtime_argument_handle_type = CoreLookupType ("System.RuntimeArgumentHandle");
runtime_helpers_type = CoreLookupType ("System.Runtime.CompilerServices.RuntimeHelpers");
default_member_type = CoreLookupType ("System.Reflection.DefaultMemberAttribute");
runtime_handle_type = CoreLookupType ("System.RuntimeTypeHandle");
asynccallback_type = CoreLookupType ("System.AsyncCallback");
iasyncresult_type = CoreLookupType ("System.IAsyncResult");
ienumerator_type = CoreLookupType ("System.Collections.IEnumerator");
ienumerable_type = CoreLookupType ("System.Collections.IEnumerable");
idisposable_type = CoreLookupType ("System.IDisposable");
icloneable_type = CoreLookupType ("System.ICloneable");
iconvertible_type = CoreLookupType ("System.IConvertible");
monitor_type = CoreLookupType ("System.Threading.Monitor");
intptr_type = CoreLookupType ("System.IntPtr");
attribute_type = CoreLookupType ("System.Attribute");
attribute_usage_type = CoreLookupType ("System.AttributeUsageAttribute");
dllimport_type = CoreLookupType ("System.Runtime.InteropServices.DllImportAttribute");
methodimpl_attr_type = CoreLookupType ("System.Runtime.CompilerServices.MethodImplAttribute");
marshal_as_attr_type = CoreLookupType ("System.Runtime.InteropServices.MarshalAsAttribute");
new_constraint_attr_type = CoreLookupType ("System.Runtime.CompilerServices.NewConstraintAttribute");
param_array_type = CoreLookupType ("System.ParamArrayAttribute");
in_attribute_type = CoreLookupType ("System.Runtime.InteropServices.InAttribute");
typed_reference_type = CoreLookupType ("System.TypedReference");
arg_iterator_type = CoreLookupType ("System.ArgIterator");
mbr_type = CoreLookupType ("System.MarshalByRefObject");
//
// Sigh. Remove this before the release. Wonder what versions of Mono
// people are running.
//
guid_attr_type = LookupType ("System.Runtime.InteropServices.GuidAttribute");
unverifiable_code_type= CoreLookupType ("System.Security.UnverifiableCodeAttribute");
void_ptr_type = CoreLookupType ("System.Void*");
indexer_name_type = CoreLookupType ("System.Runtime.CompilerServices.IndexerNameAttribute");
exception_type = CoreLookupType ("System.Exception");
activator_type = CoreLookupType ("System.Activator");
invalid_operation_exception_type = CoreLookupType ("System.InvalidOperationException");
not_supported_exception_type = CoreLookupType ("System.NotSupportedException");
//
// Attribute types
//
obsolete_attribute_type = CoreLookupType ("System.ObsoleteAttribute");
conditional_attribute_type = CoreLookupType ("System.Diagnostics.ConditionalAttribute");
cls_compliant_attribute_type = CoreLookupType ("System.CLSCompliantAttribute");
struct_layout_attribute_type = CoreLookupType ("System.Runtime.InteropServices.StructLayoutAttribute");
field_offset_attribute_type = CoreLookupType ("System.Runtime.InteropServices.FieldOffsetAttribute");
//
// Generic types
//
generic_ienumerator_type = CoreLookupType (MemberName.MakeName ("System.Collections.Generic.IEnumerator", 1));
generic_ienumerable_type = CoreLookupType (MemberName.MakeName ("System.Collections.Generic.IEnumerable", 1));
//
// When compiling corlib, store the "real" types here.
//
if (!RootContext.StdLib) {
system_int32_type = typeof (System.Int32);
system_array_type = typeof (System.Array);
system_type_type = typeof (System.Type);
system_assemblybuilder_type = typeof (System.Reflection.Emit.AssemblyBuilder);
Type [] void_arg = { };
system_int_array_get_length = GetMethod (
system_array_type, "get_Length", void_arg);
system_int_array_get_rank = GetMethod (
system_array_type, "get_Rank", void_arg);
system_object_array_clone = GetMethod (
system_array_type, "Clone", void_arg);
Type [] system_int_arg = { system_int32_type };
system_int_array_get_length_int = GetMethod (
system_array_type, "GetLength", system_int_arg);
system_int_array_get_upper_bound_int = GetMethod (
system_array_type, "GetUpperBound", system_int_arg);
system_int_array_get_lower_bound_int = GetMethod (
system_array_type, "GetLowerBound", system_int_arg);
Type [] system_array_int_arg = { system_array_type, system_int32_type };
system_void_array_copyto_array_int = GetMethod (
system_array_type, "CopyTo", system_array_int_arg);
Type [] system_3_type_arg = {
system_type_type, system_type_type, system_type_type };
Type [] system_4_type_arg = {
system_type_type, system_type_type, system_type_type, system_type_type };
MethodInfo set_corlib_type_builders = GetMethod (
system_assemblybuilder_type, "SetCorlibTypeBuilders",
system_4_type_arg, true, false);
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 {
// Compatibility for an older version of the class libs.
set_corlib_type_builders = GetMethod (
system_assemblybuilder_type, "SetCorlibTypeBuilders",
system_3_type_arg, true, true);
if (set_corlib_type_builders == null) {
Report.Error (-26, "Corlib compilation is not supported in Microsoft.NET due to bugs in it");
return;
}
object[] args = new object [3];
args [0] = object_type;
args [1] = value_type;
args [2] = enum_type;
set_corlib_type_builders.Invoke (CodeGen.Assembly.Builder, args);
}
}
system_object_expr.Type = object_type;
system_string_expr.Type = string_type;
system_boolean_expr.Type = bool_type;
system_decimal_expr.Type = decimal_type;
system_single_expr.Type = float_type;
system_double_expr.Type = double_type;
system_sbyte_expr.Type = sbyte_type;
system_byte_expr.Type = byte_type;
system_int16_expr.Type = short_type;
system_uint16_expr.Type = ushort_type;
system_int32_expr.Type = int32_type;
system_uint32_expr.Type = uint32_type;
system_int64_expr.Type = int64_type;
system_uint64_expr.Type = uint64_type;
system_char_expr.Type = char_type;
system_void_expr.Type = void_type;
system_asynccallback_expr.Type = asynccallback_type;
system_iasyncresult_expr.Type = iasyncresult_type;
system_valuetype_expr.Type = value_type;
}
//
// The helper methods that are used by the compiler
//
public static void InitCodeHelpers ()
{
//
// Now load the default methods that we use.
//
Type [] string_string = { string_type, string_type };
string_concat_string_string = GetMethod (
string_type, "Concat", string_string);
Type [] string_string_string = { string_type, string_type, string_type };
string_concat_string_string_string = GetMethod (
string_type, "Concat", string_string_string);
Type [] string_string_string_string = { string_type, string_type, string_type, string_type };
string_concat_string_string_string_string = GetMethod (
string_type, "Concat", string_string_string_string);
Type[] params_string = { TypeManager.LookupType ("System.String[]") };
string_concat_string_dot_dot_dot = GetMethod (
string_type, "Concat", params_string);
Type [] object_object = { object_type, object_type };
string_concat_object_object = GetMethod (
string_type, "Concat", object_object);
Type [] object_object_object = { object_type, object_type, object_type };
string_concat_object_object_object = GetMethod (
string_type, "Concat", object_object_object);
Type[] params_object = { TypeManager.LookupType ("System.Object[]") };
string_concat_object_dot_dot_dot = GetMethod (
string_type, "Concat", params_object);
Type [] string_ = { string_type };
string_isinterneted_string = GetMethod (
string_type, "IsInterned", string_);
Type [] runtime_type_handle = { runtime_handle_type };
system_type_get_type_from_handle = GetMethod (
type_type, "GetTypeFromHandle", runtime_type_handle);
Type [] delegate_delegate = { delegate_type, delegate_type };
delegate_combine_delegate_delegate = GetMethod (
delegate_type, "Combine", delegate_delegate);
delegate_remove_delegate_delegate = GetMethod (
delegate_type, "Remove", delegate_delegate);
//
// Void arguments
//
Type [] void_arg = { };
object_getcurrent_void = GetMethod (
ienumerator_type, "get_Current", void_arg);
bool_movenext_void = GetMethod (
ienumerator_type, "MoveNext", void_arg);
void_reset_void = GetMethod (
ienumerator_type, "Reset", void_arg);
void_dispose_void = GetMethod (
idisposable_type, "Dispose", void_arg);
int_get_offset_to_string_data = GetMethod (
runtime_helpers_type, "get_OffsetToStringData", void_arg);
int_array_get_length = GetMethod (
array_type, "get_Length", void_arg);
int_array_get_rank = GetMethod (
array_type, "get_Rank", void_arg);
ienumerable_getenumerator_void = GetMethod (
ienumerable_type, "GetEnumerator", void_arg);
//
// Int32 arguments
//
Type [] int_arg = { int32_type };
int_array_get_length_int = GetMethod (
array_type, "GetLength", int_arg);
int_array_get_upper_bound_int = GetMethod (
array_type, "GetUpperBound", int_arg);
int_array_get_lower_bound_int = GetMethod (
array_type, "GetLowerBound", int_arg);
//
// System.Array methods
//
object_array_clone = GetMethod (
array_type, "Clone", void_arg);
Type [] array_int_arg = { array_type, int32_type };
void_array_copyto_array_int = GetMethod (
array_type, "CopyTo", array_int_arg);
//
// object arguments
//
Type [] object_arg = { object_type };
void_monitor_enter_object = GetMethod (
monitor_type, "Enter", object_arg);
void_monitor_exit_object = GetMethod (
monitor_type, "Exit", object_arg);
Type [] array_field_handle_arg = { array_type, runtime_field_handle_type };
void_initializearray_array_fieldhandle = GetMethod (
runtime_helpers_type, "InitializeArray", array_field_handle_arg);
//
// Array functions
//
int_getlength_int = GetMethod (
array_type, "GetLength", int_arg);
//
// Decimal constructors
//
Type [] dec_arg = { int32_type, int32_type, int32_type, bool_type, byte_type };
void_decimal_ctor_five_args = GetConstructor (
decimal_type, dec_arg);
//
// Attributes
//
cons_param_array_attribute = GetConstructor (
param_array_type, void_arg);
unverifiable_code_ctor = GetConstructor (
unverifiable_code_type, void_arg);
default_member_ctor = GetConstructor (default_member_type, string_);
//
// InvalidOperationException
//
invalid_operation_ctor = GetConstructor (
invalid_operation_exception_type, void_arg);
// Object
object_ctor = GetConstructor (object_type, void_arg);
// Activator
Type [] type_arg = { type_type };
activator_create_instance = GetMethod (
activator_type, "CreateInstance", 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)
{
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 (t.IsSubclassOf (TypeManager.array_type))
return new MemberList (TypeManager.array_type.FindMembers (mt, bf, filter, criteria));
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;
}
//
// 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)
{
//
// 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 == TypeManager.array_type || t.IsSubclassOf (TypeManager.array_type)) {
used_cache = true;
return TypeHandle.ArrayType.MemberCache.FindMembers (
mt, bf, name, FilterWithClosure_delegate, null);
}
//
// 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 (t is TypeBuilder) {
DeclSpace decl = (DeclSpace) builder_to_declspace [t];
MemberCache 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;
}
if (t is GenericTypeParameterBuilder) {
TypeParameter tparam = (TypeParameter) builder_to_type_param [t];
MemberList list;
Timer.StartTimer (TimerType.FindMembers);
list = tparam.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
FilterWithClosure_delegate, name);
Timer.StopTimer (TimerType.FindMembers);
used_cache = false;
return (MemberInfo []) list;
}
//
// This call will always succeed. There is exactly one TypeHandle instance per
// type, TypeHandle.GetTypeHandle() will either return it or create a new one
// if it didn't already exist.
//
TypeHandle handle = TypeHandle.GetTypeHandle (t);
used_cache = true;
return handle.MemberCache.FindMembers (mt, bf, name, FilterWithClosure_delegate, null);
}
public static bool IsBuiltinType (Type 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;
}
public static bool IsBuiltinType (TypeContainer tc)
{
return IsBuiltinType (tc.TypeBuilder);
}
//
// 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 IsCLRType (Type t)
{
if (t == object_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 == bool_type ||
t == sbyte_type || t == byte_type || t == ushort_type)
return true;
else
return false;
}
public static bool IsDelegateType (Type t)
{
if (t.IsGenericInstance)
t = t.GetGenericTypeDefinition ();
if (t.IsSubclassOf (TypeManager.delegate_type))
return true;
else
return false;
}
public static bool IsEnumType (Type t)
{
if (t.IsSubclassOf (TypeManager.enum_type))
return true;
else
return false;
}
public static bool IsBuiltinOrEnum (Type t)
{
if (IsBuiltinType (t))
return true;
if (IsEnumType (t))
return true;
return false;
}
//
// Only a quick hack to get things moving, while real runtime support appears
//
public static bool IsGeneric (Type t)
{
DeclSpace ds = (DeclSpace) builder_to_declspace [t];
return ds.IsGeneric;
}
public static bool HasGenericArguments (Type t)
{
return GetNumberOfTypeArguments (t) > 0;
}
public static int GetNumberOfTypeArguments (Type t)
{
DeclSpace tc = LookupDeclSpace (t);
if (tc != null)
return tc.IsGeneric ? tc.CountTypeParameters : 0;
else
return t.HasGenericArguments ? t.GetGenericArguments ().Length : 0;
}
public static Type[] GetTypeArguments (Type t)
{
DeclSpace tc = LookupDeclSpace (t);
if (tc != null) {
if (!tc.IsGeneric)
throw new InvalidOperationException ();
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 ();
}
//
// Whether a type is unmanaged. This is used by the unsafe code (25.2)
//
public static bool IsUnmanagedType (Type t)
{
if (IsBuiltinType (t) && t != TypeManager.string_type)
return true;
if (IsEnumType (t))
return true;
if (t.IsPointer)
return true;
if (IsValueType (t)){
if (t is TypeBuilder){
TypeContainer tc = LookupTypeContainer (t);
if (tc.Fields != null){
foreach (Field f in tc.Fields){
if (f.FieldBuilder.IsStatic)
continue;
if (!IsUnmanagedType (f.FieldBuilder.FieldType))
return false;
}
} else
return true;
} else {
FieldInfo [] fields = t.GetFields ();
foreach (FieldInfo f in fields){
if (f.IsStatic)
continue;
if (!IsUnmanagedType (f.FieldType))
return false;
}
}
return true;
}
return false;
}
public static bool IsValueType (Type t)
{
return t.IsGenericParameter || t.IsValueType;
}
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 IsEqual (Type a, Type b)
{
if (a.Equals (b))
return true;
if ((a is TypeBuilder) && a.IsGenericTypeDefinition && b.IsGenericInstance) {
//
// `a' is a generic type definition's TypeBuilder and `b' is a
// generic instance of the same type.
//
// Example:
//
// class Stack
// {
// void Test (Stack stack) { }
// }
//
// The first argument of `Test' will be the generic instance
// "Stack" - which is the same type than the "Stack" TypeBuilder.
//
//
// We hit this via Closure.Filter() for gen-82.cs.
//
if (a != b.GetGenericTypeDefinition ())
return false;
Type[] aparams = a.GetGenericArguments ();
Type[] bparams = b.GetGenericArguments ();
if (aparams.Length != bparams.Length)
return false;
for (int i = 0; i < aparams.Length; i++)
if (!IsEqual (aparams [i], bparams [i]))
return false;
return true;
}
if (a.IsGenericParameter && b.IsGenericParameter) {
if ((a.DeclaringMethod != null) != (b.DeclaringMethod != null))
return false;
return a.GenericParameterPosition == b.GenericParameterPosition;
}
if (a.IsGenericInstance && b.IsGenericInstance) {
Type at = a.GetGenericTypeDefinition ();
Type bt = b.GetGenericTypeDefinition ();
if (a.GetGenericTypeDefinition () != b.GetGenericTypeDefinition ())
return false;
Type[] aargs = a.GetGenericArguments ();
Type[] bargs = b.GetGenericArguments ();
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 MayBecomeEqualGenericTypes (Type a, Type b)
{
if (a.IsGenericParameter) {
//
// If a is an array of a's type, they may never
// become equal.
//
while (b.IsArray) {
b = b.GetElementType ();
if (a.Equals (b))
return false;
}
//
// If b is a generic parameter or an actual type,
// they may become equal:
//
// class X : I, I
// class X : I, I
//
if (b.IsGenericParameter || !b.IsGenericInstance)
return true;
//
// We're now comparing a type parameter with a
// generic instance. They may become equal unless
// the type parameter appears anywhere in the
// generic instance:
//
// class X : I, I>
// -> error because you could instanciate it as
// X,int>
//
// class X : I, I> -> ok
//
Type[] bargs = GetTypeArguments (b);
for (int i = 0; i < bargs.Length; i++) {
if (a.Equals (bargs [i]))
return false;
}
return true;
}
if (b.IsGenericParameter)
return MayBecomeEqualGenericTypes (b, a);
//
// At this point, neither a nor b are a type parameter.
//
// If one of them is a generic instance, let
// MayBecomeEqualGenericInstances() compare them (if the
// other one is not a generic instance, they can never
// become equal).
//
if (a.IsGenericInstance || b.IsGenericInstance)
return MayBecomeEqualGenericInstances (a, b);
//
// If both of them are arrays.
//
if (a.IsArray && b.IsArray) {
if (a.GetArrayRank () != b.GetArrayRank ())
return false;
a = a.GetElementType ();
b = b.GetElementType ();
return MayBecomeEqualGenericTypes (a, b);
}
//
// Ok, two ordinary types.
//
return a.Equals (b);
}
//
// Checks whether two generic instances may become equal for some
// particular instantiation (26.3.1).
//
public static bool MayBecomeEqualGenericInstances (Type a, Type b)
{
if (!a.IsGenericInstance || !b.IsGenericInstance)
return false;
if (a.GetGenericTypeDefinition () != b.GetGenericTypeDefinition ())
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 (MayBecomeEqualGenericTypes (aargs [i], bargs [i]))
return true;
}
return false;
}
public static bool IsEqualGenericInstance (Type type, Type parent)
{
int tcount = GetNumberOfTypeArguments (type);
int pcount = GetNumberOfTypeArguments (parent);
if (type.IsGenericInstance)
type = type.GetGenericTypeDefinition ();
if (parent.IsGenericInstance)
parent = parent.GetGenericTypeDefinition ();
if (tcount != pcount)
return false;
return type.Equals (parent);
}
public static bool IsSubclassOf (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 (type.Equals (parent))
return true;
type = type.BaseType;
} while (type != null);
return false;
}
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 (IsEqualGenericInstance (type, parent))
return true;
type = type.BaseType;
} while (type != null);
return false;
}
//
// Checks whether `type' is a subclass or nested child of `parent'.
//
public static bool IsNestedFamilyAccessible (Type type, Type parent)
{
do {
if (IsFamilyAccessible (type, parent))
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 (IsEqual (type, parent))
return false;
type = type.DeclaringType;
while (type != null) {
if (IsEqual (type, parent))
return true;
type = type.DeclaringType;
}
return false;
}
//
// 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 ());
}
///
/// Returns the User Defined Types
///
public static ArrayList UserTypes {
get {
return user_types;
}
}
public static Hashtable TypeContainers {
get {
return typecontainers;
}
}
static Hashtable builder_to_constant;
public static void RegisterConstant (FieldBuilder fb, Const c)
{
if (builder_to_constant == null)
builder_to_constant = new PtrHashtable ();
if (builder_to_constant.Contains (fb))
return;
builder_to_constant.Add (fb, c);
}
public static Const LookupConstant (FieldBuilder fb)
{
if (builder_to_constant == null)
return null;
return (Const) builder_to_constant [fb];
}
///
/// 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, InternalParameters ip, Type [] args)
{
if (args == null)
args = NoTypes;
method_arguments.Add (mb, args);
method_internal_params.Add (mb, ip);
}
static public InternalParameters LookupParametersByBuilder (MethodBase mb)
{
if (! (mb is ConstructorBuilder || mb is MethodBuilder))
return null;
if (method_internal_params.Contains (mb))
return (InternalParameters) method_internal_params [mb];
else
throw new Exception ("Argument for Method not registered" + mb);
}
///
/// Returns the argument types for a method based on its methodbase
///
/// For dynamic methods, we use the compiler provided types, for
/// methods from existing assemblies we load them from GetParameters,
/// and insert them into the cache
///
static public Type [] GetArgumentTypes (MethodBase mb)
{
object t = method_arguments [mb];
if (t != null)
return (Type []) t;
ParameterInfo [] pi = mb.GetParameters ();
int c = pi.Length;
Type [] types;
if (c == 0) {
types = NoTypes;
} else {
types = new Type [c];
for (int i = 0; i < c; i++)
types [i] = pi [i].ParameterType;
}
method_arguments.Add (mb, types);
return types;
}
///
/// Returns the argument types for an indexer based on its PropertyInfo
///
/// For dynamic indexers, we use the compiler provided types, for
/// indexers from existing assemblies we load them from GetParameters,
/// and insert them into the cache
///
static public Type [] GetArgumentTypes (PropertyInfo indexer)
{
if (indexer_arguments.Contains (indexer))
return (Type []) indexer_arguments [indexer];
else if (indexer is PropertyBuilder)
// If we're a PropertyBuilder and not in the
// `indexer_arguments' hash, then we're a property and
// not an indexer.
return NoTypes;
else {
ParameterInfo [] pi = indexer.GetIndexParameters ();
// Property, not an indexer.
if (pi == null)
return NoTypes;
int c = pi.Length;
Type [] types = new Type [c];
for (int i = 0; i < c; i++)
types [i] = pi [i].ParameterType;
indexer_arguments.Add (indexer, types);
return types;
}
}
//
// This is a workaround the fact that GetValue is not
// supported for dynamic types
//
static Hashtable fields = new Hashtable ();
static public bool RegisterFieldValue (FieldBuilder fb, object value)
{
if (fields.Contains (fb))
return false;
fields.Add (fb, value);
return true;
}
static public object GetValue (FieldBuilder fb)
{
return fields [fb];
}
static Hashtable fieldbuilders_to_fields = new Hashtable ();
static public bool RegisterFieldBase (FieldBuilder fb, FieldBase f)
{
if (fieldbuilders_to_fields.Contains (fb))
return false;
fieldbuilders_to_fields.Add (fb, f);
return true;
}
//
// 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)
{
return (FieldBase) fieldbuilders_to_fields [fb];
}
static Hashtable events;
static public void RegisterEvent (MyEventBuilder eb, MethodBase add, MethodBase remove)
{
if (events == null)
events = new Hashtable ();
if (!events.Contains (eb)) {
events.Add (eb, new Pair (add, remove));
}
}
static public MethodInfo GetAddMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
Pair pair = (Pair) events [ei];
return (MethodInfo) pair.First;
}
return ei.GetAddMethod (true);
}
static public MethodInfo GetRemoveMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
Pair pair = (Pair) events [ei];
return (MethodInfo) pair.Second;
}
return ei.GetRemoveMethod (true);
}
static Hashtable priv_fields_events;
static public bool RegisterPrivateFieldOfEvent (EventInfo einfo, FieldBuilder builder)
{
if (priv_fields_events == null)
priv_fields_events = new Hashtable ();
if (priv_fields_events.Contains (einfo))
return false;
priv_fields_events.Add (einfo, builder);
return true;
}
static public MemberInfo GetPrivateFieldOfEvent (EventInfo ei)
{
if (priv_fields_events == null)
return null;
else
return (MemberInfo) priv_fields_events [ei];
}
static Hashtable properties;
static public bool RegisterProperty (PropertyBuilder pb, MethodBase get, MethodBase set)
{
if (properties == null)
properties = new Hashtable ();
if (properties.Contains (pb))
return false;
properties.Add (pb, new Pair (get, set));
return true;
}
static public bool RegisterIndexer (PropertyBuilder pb, MethodBase get,
MethodBase set, Type[] args)
{
if (!RegisterProperty (pb, get,set))
return false;
indexer_arguments.Add (pb, args);
return true;
}
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))
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 (Field field in tc.Fields) {
if (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 (EmitContext ec, TypeExpr [] base_interfaces)
{
ArrayList new_ifaces = new ArrayList ();
foreach (TypeExpr iface in base_interfaces){
Type itype = iface.ResolveType (ec);
if (itype == null)
return null;
if (!new_ifaces.Contains (itype))
new_ifaces.Add (itype);
Type [] implementing = itype.GetInterfaces ();
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 = new PtrHashtable ();
///
/// 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){
Type[] parent_ifaces;
if (t.BaseType == null)
parent_ifaces = NoTypes;
else
parent_ifaces = GetInterfaces (t.BaseType);
Type[] type_ifaces = (Type []) builder_to_ifaces [t];
if (type_ifaces == null)
type_ifaces = NoTypes;
int parent_count = parent_ifaces.Length;
Type[] result = new Type [parent_count + type_ifaces.Length];
parent_ifaces.CopyTo (result, 0);
type_ifaces.CopyTo (result, parent_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 = NoTypes;
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 parents.
//
do {
interfaces = GetInterfaces (t);
if (interfaces != null){
foreach (Type i in interfaces){
if (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;
}
//
// 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.
//
error = false;
try {
if (conversionType.Equals (typeof (Boolean)))
return (object)(convert_value.ToBoolean (nf_provider));
else if (conversionType.Equals (typeof (Byte)))
return (object)(convert_value.ToByte (nf_provider));
else if (conversionType.Equals (typeof (Char)))
return (object)(convert_value.ToChar (nf_provider));
else if (conversionType.Equals (typeof (DateTime)))
return (object)(convert_value.ToDateTime (nf_provider));
else if (conversionType.Equals (typeof (Decimal)))
return (object)(convert_value.ToDecimal (nf_provider));
else if (conversionType.Equals (typeof (Double)))
return (object)(convert_value.ToDouble (nf_provider));
else if (conversionType.Equals (typeof (Int16)))
return (object)(convert_value.ToInt16 (nf_provider));
else if (conversionType.Equals (typeof (Int32)))
return (object)(convert_value.ToInt32 (nf_provider));
else if (conversionType.Equals (typeof (Int64)))
return (object)(convert_value.ToInt64 (nf_provider));
else if (conversionType.Equals (typeof (SByte)))
return (object)(convert_value.ToSByte (nf_provider));
else if (conversionType.Equals (typeof (Single)))
return (object)(convert_value.ToSingle (nf_provider));
else if (conversionType.Equals (typeof (String)))
return (object)(convert_value.ToString (nf_provider));
else if (conversionType.Equals (typeof (UInt16)))
return (object)(convert_value.ToUInt16 (nf_provider));
else if (conversionType.Equals (typeof (UInt32)))
return (object)(convert_value.ToUInt32 (nf_provider));
else if (conversionType.Equals (typeof (UInt64)))
return (object)(convert_value.ToUInt64 (nf_provider));
else if (conversionType.Equals (typeof (Object)))
return (object)(value);
else
error = true;
} catch {
error = true;
}
return null;
}
//
// This is needed, because enumerations from assemblies
// do not report their underlyingtype, but they report
// themselves
//
public static Type EnumToUnderlying (Type t)
{
if (t == TypeManager.enum_type)
return t;
t = t.UnderlyingSystemType;
if (!TypeManager.IsEnumType (t))
return t;
if (t is TypeBuilder) {
// slow path needed to compile corlib
if (t == TypeManager.bool_type ||
t == TypeManager.byte_type ||
t == TypeManager.sbyte_type ||
t == TypeManager.char_type ||
t == TypeManager.short_type ||
t == TypeManager.ushort_type ||
t == TypeManager.int32_type ||
t == TypeManager.uint32_type ||
t == TypeManager.int64_type ||
t == TypeManager.uint64_type)
return t;
throw new Exception ("Unhandled typecode in enum " + " from " + t.AssemblyQualifiedName);
}
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;
}
throw new Exception ("Unhandled typecode in enum " + tc + " from " + t.AssemblyQualifiedName);
}
//
// When compiling corlib and called with one of the core types, return
// the corresponding typebuilder for that type.
//
public static Type TypeToCoreType (Type t)
{
if (RootContext.StdLib || (t is TypeBuilder))
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;
default:
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;
return t;
}
}
///
/// Utility function that can be used to probe whether a type
/// is managed or not.
///
public static bool VerifyUnManaged (Type t, Location loc)
{
if (t.IsValueType || t.IsPointer){
//
// FIXME: this is more complex, we actually need to
// make sure that the type does not contain any
// classes itself
//
return true;
}
if (!RootContext.StdLib && (t == TypeManager.decimal_type))
// We need this explicit check here to make it work when
// compiling corlib.
return true;
Report.Error (
208, loc,
"Cannot take the address or size of a variable of a managed type ('" +
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)
{
if (t.IsGenericInstance)
t = t.GetGenericTypeDefinition ();
if (t is TypeBuilder) {
TypeContainer tc = t.IsInterface ? LookupInterface (t) : LookupTypeContainer (t);
return tc == null ? TypeContainer.DefaultIndexerName : tc.IndexerName;
}
System.Attribute attr = System.Attribute.GetCustomAttribute (
t, TypeManager.default_member_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.Warning (-24, new Location (-1),
"This version of the runtime does not support making pinned local variables. " +
"This code may cause errors on a runtime with a moving GC");
return ig.DeclareLocal (t);
}
}
return (LocalBuilder) declare_local_method.Invoke (ig, new object [] { t, true });
}
//
// Returns whether the array of memberinfos contains the given method
//
public static bool ArrayContainsMethod (MemberInfo [] array, MethodBase new_method)
{
Type [] new_args = TypeManager.GetArgumentTypes (new_method);
foreach (MethodBase method in array) {
if (method.Name != new_method.Name)
continue;
if (method is MethodInfo && new_method is MethodInfo)
if (((MethodInfo) method).ReturnType != ((MethodInfo) new_method).ReturnType)
continue;
Type [] old_args = TypeManager.GetArgumentTypes (method);
int old_count = old_args.Length;
int i;
if (new_args.Length != old_count)
continue;
for (i = 0; i < old_count; i++){
if (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))
target_list.Add (new_method);
}
return target_list;
}
static public bool IsGenericMethod (MethodBase mb)
{
if (mb.DeclaringType is TypeBuilder) {
IMethodData method = (IMethodData) builder_to_method [mb];
if (method == null)
return false;
return method.GenericMethod != null;
}
return mb.IsGenericMethodDefinition;
}
#region MemberLookup implementation
//
// Whether we allow private members in the result (since FindMembers
// uses NonPublic for both protected and private), we need to distinguish.
//
static internal bool FilterNone (MemberInfo m, object filter_criteria)
{
return true;
}
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)
return true;
// A nested class has access to all the protected members visible
// to its parent.
if (qualifier_type != null
&& TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
return true;
if (invocation_type == m.DeclaringType
|| invocation_type.IsSubclassOf (m.DeclaringType)) {
// 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 (qualifier_type == null
|| qualifier_type == invocation_type
|| qualifier_type.IsSubclassOf (invocation_type))
return true;
}
if (almost_match != null)
almost_match.Add (m);
return false;
}
bool Filter (MethodBase mb, object filter_criteria)
{
MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
if (ma == MethodAttributes.Private)
return private_ok ||
IsEqual (invocation_type, mb.DeclaringType) ||
IsNestedChildOf (invocation_type, mb.DeclaringType);
//
// FamAndAssem requires that we not only derivate, but we are on the
// same assembly.
//
if (ma == MethodAttributes.FamANDAssem){
if (invocation_assembly != mb.DeclaringType.Assembly)
return false;
}
// Assembly and FamORAssem succeed if we're in the same assembly.
if ((ma == MethodAttributes.Assembly) || (ma == MethodAttributes.FamORAssem)){
if (invocation_assembly == mb.DeclaringType.Assembly)
return true;
}
// We already know that we aren't in the same assembly.
if (ma == MethodAttributes.Assembly)
return false;
// Family and FamANDAssem require that we derive.
if ((ma == MethodAttributes.Family) || (ma == MethodAttributes.FamANDAssem)){
if (invocation_type == null)
return false;
if (!IsNestedFamilyAccessible (invocation_type, mb.DeclaringType))
return false;
// Although a derived class can access protected members of its base class
// it cannot do so through an instance of the base class (CS1540).
if (!mb.IsStatic && (qualifier_type != null) &&
!IsEqualGenericInstance (invocation_type, qualifier_type) &&
TypeManager.IsFamilyAccessible (invocation_type, qualifier_type) &&
!TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
return false;
return true;
}
// Public.
return true;
}
bool Filter (FieldInfo fi, object filter_criteria)
{
FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
if (fa == FieldAttributes.Private)
return private_ok ||
IsEqual (invocation_type, fi.DeclaringType) ||
IsNestedChildOf (invocation_type, fi.DeclaringType);
//
// FamAndAssem requires that we not only derivate, but we are on the
// same assembly.
//
if (fa == FieldAttributes.FamANDAssem){
if (invocation_assembly != fi.DeclaringType.Assembly)
return false;
}
// Assembly and FamORAssem succeed if we're in the same assembly.
if ((fa == FieldAttributes.Assembly) || (fa == FieldAttributes.FamORAssem)){
if (invocation_assembly == fi.DeclaringType.Assembly)
return true;
}
// We already know that we aren't in the same assembly.
if (fa == FieldAttributes.Assembly)
return false;
// Family and FamANDAssem require that we derive.
if ((fa == FieldAttributes.Family) || (fa == FieldAttributes.FamANDAssem)){
if (invocation_type == null)
return false;
if (!IsNestedFamilyAccessible (invocation_type, fi.DeclaringType))
return false;
// Although a derived class can access protected members of its base class
// it cannot do so through an instance of the base class (CS1540).
if (!fi.IsStatic && (qualifier_type != null) &&
!IsEqualGenericInstance (invocation_type, qualifier_type) &&
TypeManager.IsFamilyAccessible (invocation_type, qualifier_type) &&
!TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
return false;
return true;
}
// Public.
return true;
}
//
// 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) &&
IsEqual (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)
return Filter ((MethodBase) m, filter_criteria);
if (m is FieldInfo)
return Filter ((FieldInfo) m, filter_criteria);
//
// EventInfos and PropertyInfos, return true because they lack
// permission information, so we need to check later on the methods.
//
return true;
}
}
static Closure closure = new Closure ();
static MemberFilter FilterWithClosure_delegate = new MemberFilter (closure.Filter);
//
// 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 = false;
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;
//
// If we are a nested class, we always have access to our container
// type names
//
if (invocation_type != null){
string invocation_name = invocation_type.FullName;
if ((invocation_name != null) && (invocation_name.IndexOf ('+') != -1)){
string container = queried_type.FullName + "+";
int container_length = container.Length;
if (invocation_name.Length > container_length){
string shared = invocation_name.Substring (0, container_length);
if (shared == container)
always_ok_flag = true;
}
}
}
// 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 parent 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;
}
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] };
// Oooops
return null;
}
//
// 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) {
foreach (MemberInfo mi in first_members_list) {
if (! (mi is MethodBase)) {
method_list = CopyNewMethods (method_list, first_members_list);
return (MemberInfo []) method_list.ToArray (typeof (MemberInfo));
}
}
return (MemberInfo []) 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;
}
// Tests whether external method is really special
public static bool IsSpecialMethod (MethodBase mb)
{
string name = mb.Name;
if (name.StartsWith ("get_") || name.StartsWith ("set_"))
return mb.DeclaringType.GetProperty (name.Substring (4)) != null;
if (name.StartsWith ("add_"))
return mb.DeclaringType.GetEvent (name.Substring (4)) != null;
if (name.StartsWith ("remove_"))
return mb.DeclaringType.GetEvent (name.Substring (7)) != null;
if (name.StartsWith ("op_")){
foreach (string oname in Unary.oper_names) {
if (oname == name)
return true;
}
foreach (string oname in Binary.oper_names) {
if (oname == name)
return true;
}
}
return false;
}
#endregion
}
///
/// There is exactly one instance of this class per type.
///
public sealed class TypeHandle : IMemberContainer {
public readonly TypeHandle BaseType;
readonly int id = ++next_id;
static int next_id = 0;
///
/// 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.
///
public 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 void CleanUp ()
{
type_hash = null;
}
///
/// 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 IMemberContainer ArrayType {
get {
if (array_type != null)
return array_type;
array_type = GetTypeHandle (TypeManager.array_type);
return array_type;
}
}
private static PtrHashtable type_hash = new PtrHashtable ();
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 TypeHandle (Type type)
{
this.type = type;
full_name = type.FullName != null ? type.FullName : type.Name;
if (type.BaseType != null)
BaseType = GetTypeHandle (type.BaseType);
this.is_interface = type.IsInterface || type.IsGenericParameter;
this.member_cache = new MemberCache (this);
}
// IMemberContainer methods
public string Name {
get {
return full_name;
}
}
public Type Type {
get {
return type;
}
}
public IMemberContainer ParentContainer {
get {
return BaseType;
}
}
public bool IsInterface {
get {
return is_interface;
}
}
public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
{
MemberInfo [] members;
if (type is GenericTypeParameterBuilder)
return MemberList.Empty;
if (mt == MemberTypes.Event)
members = type.GetEvents (bf | BindingFlags.DeclaredOnly);
else
members = type.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
null, null);
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 + ")";
}
}
}