//
// 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)
//
//
using System;
using System.Globalization;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.Text.RegularExpressions;
using System.Runtime.CompilerServices;
using System.Diagnostics;
namespace Mono.MonoBASIC {
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 date_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 idisposable_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 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 param_array_type;
static public Type void_ptr_type;
static public Type indexer_name_type;
static public Type exception_type;
static public object obsolete_attribute_type;
static public object conditional_attribute_type;
//
// An empty array of types
//
static public Type [] NoTypes;
//
// Expressions representing the internal types. Used during declaration
// definition.
//
static public Expression system_object_expr, system_string_expr;
static public Expression system_boolean_expr, system_decimal_expr;
static public Expression system_single_expr, system_double_expr;
static public Expression system_sbyte_expr, system_byte_expr;
static public Expression system_int16_expr, system_uint16_expr;
static public Expression system_int32_expr, system_uint32_expr;
static public Expression system_int64_expr, system_uint64_expr;
static public Expression system_char_expr, system_void_expr;
static public Expression system_date_expr;
static public Expression system_asynccallback_expr;
static public Expression system_iasyncresult_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;
static public MethodInfo system_void_set_corlib_type_builders;
//
// 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_object_object;
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 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;
//
// The attribute constructors.
//
static public ConstructorInfo cons_param_array_attribute;
static public ConstructorInfo void_decimal_ctor_five_args;
static public ConstructorInfo void_datetime_ctor_ticks_arg;
static public ConstructorInfo unverifiable_code_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 module builders. We used this to do lookups
// on the modulebuilder using GetType -- needed for arrays
//
// This is changed from list of ModuleBuilders
// to list of Modules for getting addmodule
// compiler option working
// Anirban - 13.07.2004
static System.Reflection.Module [] modules;
//
// This is the type_cache from the assemblies to avoid
// hitting System.Reflection on every lookup.
//
static CaseInsensitiveHashtable types;
//
// This is used to hotld the corresponding TypeContainer objects
// since we need this in FindMembers
//
static CaseInsensitiveHashtable 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;
//
// 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;
struct Signature {
public string name;
public Type [] args;
}
///
/// 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_date_expr = new TypeLookupExpression ("System.DateTime");
system_asynccallback_expr = new TypeLookupExpression ("System.AsyncCallback");
system_iasyncresult_expr = new TypeLookupExpression ("System.IAsyncResult");
}
static TypeManager ()
{
assemblies = new Assembly [0];
modules = null;
user_types = new ArrayList ();
types = new CaseInsensitiveHashtable ();
negative_hits = new CaseInsensitiveHashtable ();
typecontainers = new CaseInsensitiveHashtable ();
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 ();
NoTypes = new Type [0];
signature_filter = new MemberFilter (SignatureFilter);
InitExpressionTypes ();
}
public static void AddUserType (string name, TypeBuilder t, Type [] ifaces)
{
try {
types.Add (name, t);
} catch {
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;
Report.Warning (
1595, "The type '" + name + "' is defined in an existing assembly;"+
" Using the new definition from: " + tc.Location);
Report.Warning (1595, "Previously defined in: " + prev.Assembly.FullName);
types.Remove (name);
types.Add (name, t);
}
user_types.Add (t);
if (ifaces != null)
builder_to_ifaces [t] = ifaces;
}
//
// This entry point is used by types that we define under the covers
//
public static void RegisterBuilder (TypeBuilder tb, Type [] ifaces)
{
if (ifaces != null)
builder_to_ifaces [tb] = ifaces;
}
public static void AddUserType (string name, TypeBuilder t, TypeContainer tc, Type [] ifaces)
{
builder_to_declspace.Add (t, tc);
typecontainers.Add (name, tc);
AddUserType (name, t, ifaces);
}
public static void AddDelegateType (string name, TypeBuilder t, Delegate del)
{
types.Add (name, t);
builder_to_declspace.Add (t, del);
}
public static void AddEnumType (string name, TypeBuilder t, Enum en)
{
types.Add (name, t);
builder_to_declspace.Add (t, en);
}
public static void AddUserInterface (string name, TypeBuilder t, Interface i, Type [] ifaces)
{
AddUserType (name, t, ifaces);
builder_to_declspace.Add (t, i);
}
public static void AddMethod (MethodBuilder builder, MethodData method)
{
builder_to_method.Add (builder, method);
}
///
/// 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 IMemberContainer LookupMemberContainer (Type t)
{
if (t is TypeBuilder) {
IMemberContainer container = builder_to_declspace [t] as IMemberContainer;
if (container != null)
return container;
}
return TypeHandle.GetTypeHandle (t);
}
public static Interface LookupInterface (Type t)
{
return builder_to_declspace [t] as Interface;
}
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 TypeContainer LookupClass (Type t)
{
return builder_to_declspace [t] as TypeContainer;
}
///
/// Registers an assembly to load types from.
///
public static void AddAssembly (Assembly a)
{
int top = assemblies.Length;
Assembly [] n = new Assembly [top + 1];
assemblies.CopyTo (n, 0);
n [top] = a;
assemblies = n;
foreach(Type type in a.GetTypes()) {
if (type.IsPublic ) // && type. attributed as standard module
AddStandardModule(type);
}
}
///
/// Registers a module builder to lookup types from
///
public static void AddModule (System.Reflection.Module mb)
{
int top = modules != null ? modules.Length : 0;
System.Reflection.Module [] n = new System.Reflection.Module [top + 1];
if (modules != null)
modules.CopyTo (n, 0);
n [top] = mb;
modules = n;
}
private class StandardModule {
public readonly string Namespace;
public readonly string Name;
private readonly string asString;
public StandardModule(string _namespace, string name) {
Namespace = _namespace;
Name = name;
asString = ((Namespace != null && Namespace.Length > 0)?(Namespace + "."):"") + Name;
}
public override string ToString() { return asString; }
}
private static StandardModule[] standardModules;
///
/// Registers a new 'standard module' to lookup short-qualified or unqualified members
///
internal static void AddStandardModule(Module module)
{
int top = standardModules != null ? standardModules.Length : 0;
StandardModule [] n = new StandardModule [top + 1];
if (standardModules != null)
standardModules.CopyTo (n, 0);
string name = module.Name;
int split = name.LastIndexOf('.');
if (split > 0)
name = name.Substring(split+1);
n [top] = new StandardModule(module.Namespace.Name, name);
// Console.WriteLine("Standard Module added: " + n [top]);
standardModules = n;
}
///
/// Registers a existing 'standard module' to lookup short-qualified or unqualified members
///
private static void AddStandardModule(Type type)
{
object[] attributes = type.GetCustomAttributes(false);
for (int i = 0; i < attributes.Length; i ++) {
if (attributes[i].ToString() == "Microsoft.VisualBasic.CompilerServices.StandardModuleAttribute") {
int top = standardModules != null ? standardModules.Length : 0;
StandardModule [] n = new StandardModule [top + 1];
if (standardModules != null)
standardModules.CopyTo (n, 0);
n [top] = new StandardModule(type.Namespace, type.Name) ;
standardModules = n;
return;
}
}
}
//
//
//
public static Type[] GetPertinentStandardModules(params string[] namespaces)
{
ArrayList list = new ArrayList();
foreach(string Namespace in namespaces)
{
for(int i = 0; i < standardModules.Length; i++) {
if (standardModules[i].Namespace == Namespace) {
string name = standardModules[i].ToString();
Type t = LookupType(name);
if (t == null) {
System.Console.WriteLine("Could not find standard module '" + name + "'");
}
else {
list.Add(t);
}
}
}
}
return (Type[])list.ToArray(typeof(Type));
}
//
// Low-level lookup, cache-less
//
static Type LookupTypeReflection (string name)
{
Type t;
try {
foreach (Assembly a in assemblies){
t = a.GetType (name, false, true);
if (t != null)
return t;
}
foreach (System.Reflection.Module mb in modules) {
t = mb.GetType (name, false, true);
if (t != null){
return t;
}
}
} catch (Exception e) {
System.Console.WriteLine("\nERROR: " + e.ToString() + "WHILE EXECUTING LookupTypeReflection(\"" + name + "\")\n");
}
return null;
}
static CaseInsensitiveHashtable negative_hits;
//
// 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;
if (negative_hits.Contains (name))
return null;
t = LookupTypeReflection (name);
if (t == null)
negative_hits [name] = null;
else
types [name] = t;
return t;
}
///
/// 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;
if (negative_hits.Contains (name))
return null;
//
// Optimization: ComposedCast will work with an existing type, and might already have the
// full name of the type, so the full system lookup can probably be avoided.
//
string [] elements = name.Split ('.');
int count = elements.Length;
for (int n = 1; n <= count; n++){
string top_level_type = String.Join (".", elements, 0, n);
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;
}
string newt = top_level_type + "+" + String.Join ("+", elements, n, count - n);
t = LookupTypeReflection (newt);
if (t == null)
negative_hits [name] = null;
else
types [name] = t;
return t;
}
negative_hits [name] = null;
return null;
}
//
// Returns a list of all namespaces in the assemblies and types loaded.
//
public static CaseInsensitiveHashtable GetNamespaces ()
{
CaseInsensitiveHashtable namespaces = new CaseInsensitiveHashtable ();
foreach (Assembly a in assemblies) {
foreach (Type t in a.GetTypes ()) {
string ns = t.Namespace;
if (namespaces.Contains (ns))
continue;
namespaces [ns] = ns;
}
}
foreach (System.Reflection.Module mb in modules) {
foreach (Type t in mb.GetTypes ()) {
string ns = t.Namespace;
if (namespaces.Contains (ns))
continue;
namespaces [ns] = ns;
}
}
return namespaces;
}
///
/// Returns the C# name of a type if possible, or the full type name otherwise
///
static public string MonoBASIC_Name (Type t)
{
return Regex.Replace (t.FullName,
@"^System\." +
@"(Int32|Int16|Int64|Single|Double|Char|Decimal|Byte|Object|Boolean|String|DateTime)" +
@"(\W+|\b)",
new MatchEvaluator (MonoBASIC_NameMatch));
}
static String MonoBASIC_NameMatch (Match match)
{
string s = match.Groups [1].Captures [0].Value;
return s.ToLower ().
Replace ("int32", "integer").
Replace ("int16", "short").
Replace ("int64", "long").
Replace ("datetime", "date")
+ match.Groups [2].Captures [0].Value;
}
///
/// Returns the signature of the method
///
static public string MonoBASIC_Signature (MethodBase mb)
{
string sig = "(";
//
// 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){
ParameterInfo [] pi = mb.GetParameters ();
iparams = new ReflectionParameters (pi);
}
for (int i = 0; i < iparams.Count; i++) {
if (i > 0) {
sig += ", ";
}
sig += iparams.ParameterDesc(i);
}
sig += ")";
return mb.DeclaringType.Name + "." + mb.Name + sig;
}
///
/// 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 = LookupType (name);
if (t == null){
Report.Error (518, "The predefined type '" + name + "' is not defined or imported");
Environment.Exit (0);
}
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)
{
MemberList list;
Signature sig;
sig.name = name;
sig.args = args;
list = FindMembers (t, MemberTypes.Method, instance_and_static | BindingFlags.Public| BindingFlags.IgnoreCase,
signature_filter, sig);
if (list.Count == 0) {
Report.Error (-19, "Can not find the core function '" + name + "'");
return null;
}
MethodInfo mi = list [0] as MethodInfo;
if (mi == null) {
Report.Error (-19, "Can not find the core function '" + name + "'");
return null;
}
return mi;
}
///
/// Returns the ConstructorInfo for "args"
///
public 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 | BindingFlags.IgnoreCase,
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");
date_type = CoreLookupType ("System.DateTime");
type_type = CoreLookupType ("System.Type");
runtime_field_handle_type = CoreLookupType ("System.RuntimeFieldHandle");
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");
idisposable_type = CoreLookupType ("System.IDisposable");
icloneable_type = CoreLookupType ("System.ICloneable");
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");
param_array_type = CoreLookupType ("System.ParamArrayAttribute");
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");
//
// Attribute types
//
obsolete_attribute_type = CoreLookupType ("System.ObsoleteAttribute");
conditional_attribute_type = CoreLookupType ("System.Diagnostics.ConditionalAttribute");
//
// 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_type_type_arg = { system_type_type, system_type_type, system_type_type };
try {
system_void_set_corlib_type_builders = GetMethod (
system_assemblybuilder_type, "SetCorlibTypeBuilders",
system_type_type_arg);
object[] args = new object [3];
args [0] = object_type;
args [1] = value_type;
args [2] = enum_type;
system_void_set_corlib_type_builders.Invoke (CodeGen.AssemblyBuilder, args);
} catch {
Console.WriteLine ("Corlib compilation is not supported in Microsoft.NET due to bugs in it");
}
}
}
//
// 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 [] object_object = { object_type, object_type };
string_concat_object_object = GetMethod (
string_type, "Concat", object_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_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);
//
// 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);
// DateTime constructor
Type [] ticks_arg = { int64_type };
void_datetime_ctor_ticks_arg = GetConstructor ( date_type, ticks_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_);
}
const BindingFlags instance_and_static = BindingFlags.Static | BindingFlags.Instance;
static CaseInsensitiveHashtable type_hash = new CaseInsensitiveHashtable ();
///
/// 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];
bf |= BindingFlags.IgnoreCase;
//
// '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));
//
// 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) | BindingFlags.IgnoreCase, 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) | BindingFlags.IgnoreCase, 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 MemberList 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.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.
MemberList list;
Timer.StartTimer (TimerType.FindMembers);
list = decl.FindMembers (mt, bf | BindingFlags.DeclaredOnly | BindingFlags.IgnoreCase,
FilterWithClosure_delegate, name);
Timer.StopTimer (TimerType.FindMembers);
used_cache = false;
return 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 ||
t == date_type)
return true;
else
return false;
}
public static bool IsDelegateType (Type t)
{
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;
}
//
// 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);
foreach (Field f in tc.Fields){
if (f.FieldBuilder.IsStatic)
continue;
if (!IsUnmanagedType (f.FieldBuilder.FieldType))
return false;
}
} 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)
{
if (t.IsSubclassOf (TypeManager.value_type))
return true;
else
return false;
}
public static bool IsInterfaceType (Type t)
{
Interface iface = builder_to_declspace [t] as Interface;
if (iface != null)
return true;
else
return false;
}
//
// Checks whether 'type' is a subclass or nested child of 'parent'.
//
public static bool IsSubclassOrNestedChildOf (Type type, Type parent)
{
do {
if ((type == parent) || type.IsSubclassOf (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 ((type == parent) || type.IsSubclassOf (parent))
return false;
else
return IsSubclassOrNestedChildOf (type, parent);
}
///
/// Returns the User Defined Types
///
public static ArrayList UserTypes {
get {
return user_types;
}
}
public static CaseInsensitiveHashtable 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 bool RegisterMethod (MethodBase mb, InternalParameters ip, Type [] args)
{
if (args == null)
args = NoTypes;
method_arguments.Add (mb, args);
method_internal_params.Add (mb, ip);
return true;
}
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)
{
if (method_arguments.Contains (mb))
return (Type []) method_arguments [mb];
else {
ParameterInfo [] pi = mb.GetParameters ();
int c = pi.Length;
Type [] 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 we're a PropertyBuilder and not in the
// 'indexer_arguments' hash, then we're a property and
// not an indexer.
MethodInfo mi = indexer.GetSetMethod (true);
if (mi == null) {
mi = indexer.GetGetMethod (true);
if (mi == null)
return NoTypes;
}
ParameterInfo [] pi = mi.GetParameters ();
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;
}
/*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 CaseInsensitiveHashtable fields = new CaseInsensitiveHashtable ();
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 CaseInsensitiveHashtable fieldbuilders_to_fields = new CaseInsensitiveHashtable ();
static public bool RegisterFieldBase (FieldBuilder fb, FieldBase f)
{
if (fieldbuilders_to_fields.Contains (fb))
return false;
fieldbuilders_to_fields.Add (fb, f);
return true;
}
static public FieldBase GetField (FieldInfo fb)
{
return (FieldBase) fieldbuilders_to_fields [fb];
}
static CaseInsensitiveHashtable events;
static public bool RegisterEvent (MyEventBuilder eb, MethodBase add, MethodBase remove)
{
if (events == null)
events = new CaseInsensitiveHashtable ();
if (events.Contains (eb))
return false;
events.Add (eb, new Pair (add, remove));
return true;
}
static public MethodInfo GetAddMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
Pair pair = (Pair) events [ei];
return (MethodInfo) pair.First;
} else
return ei.GetAddMethod ();
}
static public MethodInfo GetRemoveMethod (EventInfo ei)
{
if (ei is MyEventBuilder) {
Pair pair = (Pair) events [ei];
return (MethodInfo) pair.Second;
} else
return ei.GetAddMethod ();
}
static CaseInsensitiveHashtable priv_fields_events;
static public bool RegisterPrivateFieldOfEvent (EventInfo einfo, FieldBuilder builder)
{
if (priv_fields_events == null)
priv_fields_events = new CaseInsensitiveHashtable ();
if (priv_fields_events.Contains (einfo))
return false;
priv_fields_events.Add (einfo, builder);
return true;
}
static public MemberInfo GetPrivateFieldOfEvent (EventInfo ei)
{
return (MemberInfo) priv_fields_events [ei];
}
static CaseInsensitiveHashtable properties;
static public bool RegisterProperty (PropertyBuilder pb, MethodBase get, MethodBase set)
{
if (properties == null)
properties = new CaseInsensitiveHashtable ();
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;
}
static public MethodInfo GetPropertyGetter (PropertyInfo pi)
{
if (pi is PropertyBuilder){
Pair de = (Pair) properties [pi];
return (MethodInfo) de.Second;
} else
return pi.GetSetMethod (true);
}
static public MethodInfo GetPropertySetter (PropertyInfo pi)
{
if (pi is PropertyBuilder){
Pair de = (Pair) properties [pi];
return (MethodInfo) de.First;
} else
return pi.GetGetMethod (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 (Type [] base_interfaces)
{
ArrayList new_ifaces = new ArrayList();
ExpandAllInterfaces (base_interfaces, ref new_ifaces);
Type [] ret = new Type [new_ifaces.Count];
new_ifaces.CopyTo (ret, 0);
return ret;
}
///
/// Recursively finds out each base interface in case
/// of multiple inheritance
///
public static void ExpandAllInterfaces
(Type [] base_interfaces, ref ArrayList new_ifaces)
{
foreach (Type iface in base_interfaces) {
if (!new_ifaces.Contains (iface))
new_ifaces.Add (iface);
Type [] implementing = TypeManager.GetInterfaces (iface);
//
// Incase any base interface is present call this function again
//
if (implementing.Length != 0)
ExpandAllInterfaces (implementing, ref new_ifaces);
}
}
///
/// This function returns the interfaces in the type 't'. Works with
/// both types and TypeBuilders.
///
public static Type [] GetInterfaces (Type t)
{
//
// 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);
return result;
} else
return t.GetInterfaces ();
}
///
/// 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;
}
// 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)
{
if (!(value is IConvertible))
throw new ArgumentException ();
IConvertible convertValue = (IConvertible) value;
CultureInfo ci = CultureInfo.CurrentCulture;
NumberFormatInfo provider = ci.NumberFormat;
//
// 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.
//
if (conversionType.Equals (typeof (Boolean)))
return (object)(convertValue.ToBoolean (provider));
else if (conversionType.Equals (typeof (Byte)))
return (object)(convertValue.ToByte (provider));
else if (conversionType.Equals (typeof (Char)))
return (object)(convertValue.ToChar (provider));
else if (conversionType.Equals (typeof (DateTime)))
return (object)(convertValue.ToDateTime (provider));
else if (conversionType.Equals (typeof (Decimal)))
return (object)(convertValue.ToDecimal (provider));
else if (conversionType.Equals (typeof (Double)))
return (object)(convertValue.ToDouble (provider));
else if (conversionType.Equals (typeof (Int16)))
return (object)(convertValue.ToInt16 (provider));
else if (conversionType.Equals (typeof (Int32)))
return (object)(convertValue.ToInt32 (provider));
else if (conversionType.Equals (typeof (Int64)))
return (object)(convertValue.ToInt64 (provider));
else if (conversionType.Equals (typeof (SByte)))
return (object)(convertValue.ToSByte (provider));
else if (conversionType.Equals (typeof (Single)))
return (object)(convertValue.ToSingle (provider));
else if (conversionType.Equals (typeof (String)))
return (object)(convertValue.ToString (provider));
else if (conversionType.Equals (typeof (UInt16)))
return (object)(convertValue.ToUInt16 (provider));
else if (conversionType.Equals (typeof (UInt32)))
return (object)(convertValue.ToUInt32 (provider));
else if (conversionType.Equals (typeof (UInt64)))
return (object)(convertValue.ToUInt64 (provider));
else if (conversionType.Equals (typeof (Object)))
return (object)(value);
else
throw new InvalidCastException ();
}
//
// 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.String:
return TypeManager.string_type;
case TypeCode.DateTime:
return TypeManager.date_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;
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 ('" +
MonoBASIC_Name (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 DefaultMemberAttribute in the class.
///
/// For example, the String class indexer is named 'Chars' not 'Item'
///
public static string IndexerPropertyName (Type t)
{
if (t is TypeBuilder) {
if (t.IsInterface) {
Interface i = LookupInterface (t);
if ((i == null) || (i.DefaultPropName == null))
return "Item";
return i.DefaultPropName;
} else {
TypeContainer tc = LookupTypeContainer (t);
if ((tc == null) || (tc.DefaultPropName == null))
return "Item";
return tc.DefaultPropName;
}
}
System.Attribute attr = System.Attribute.GetCustomAttribute (
t, TypeManager.default_member_type);
if (attr != null){
DefaultMemberAttribute dma = (DefaultMemberAttribute) attr;
return dma.MemberName;
}
return "Item";
}
public static void MakePinned (LocalBuilder builder)
{
//
// FIXME: Flag the "LocalBuilder" type as being
// pinned. Figure out API.
//
}
//
// Returns whether the array of memberinfos contains the given method
//
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;
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, MemberList 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;
}
[Flags]
public enum MethodFlags {
IsObsolete = 1,
IsObsoleteError = 2,
ShouldIgnore = 3
}
//
// Returns the TypeManager.MethodFlags for this method.
// This emits an error 619 / warning 618 if the method is obsolete.
// In the former case, TypeManager.MethodFlags.IsObsoleteError is returned.
//
static public MethodFlags GetMethodFlags (MethodBase mb, Location loc)
{
MethodFlags flags = 0;
if (mb.DeclaringType is TypeBuilder){
MethodData method = (MethodData) builder_to_method [mb];
if (method == null) {
// FIXME: implement Obsolete attribute on Property,
// Indexer and Event.
return 0;
}
return method.GetMethodFlags (loc);
}
object [] attrs = mb.GetCustomAttributes (true);
foreach (object ta in attrs){
if (!(ta is System.Attribute)){
Console.WriteLine ("Unknown type in GetMethodFlags: " + ta);
continue;
}
System.Attribute a = (System.Attribute) ta;
if (a.TypeId == TypeManager.obsolete_attribute_type){
ObsoleteAttribute oa = (ObsoleteAttribute) a;
string method_desc = TypeManager.MonoBASIC_Signature (mb);
if (oa.IsError) {
Report.Error (619, loc, "Method '" + method_desc +
"' is obsolete: '" + oa.Message + "'");
return MethodFlags.IsObsoleteError;
} else
Report.Warning (618, loc, "Method '" + method_desc +
"' is obsolete: '" + oa.Message + "'");
flags |= MethodFlags.IsObsolete;
continue;
}
//
// Skip over conditional code.
//
if (a.TypeId == TypeManager.conditional_attribute_type){
ConditionalAttribute ca = (ConditionalAttribute) a;
if (RootContext.AllDefines [ca.ConditionString] == null)
flags |= MethodFlags.ShouldIgnore;
}
}
return flags;
}
#region MemberLookup implementation
//
// Name of the member
//
static string closure_name;
//
// Whether we allow private members in the result (since FindMembers
// uses NonPublic for both protected and private), we need to distinguish.
//
static bool closure_private_ok;
//
// Who is invoking us and which type is being queried currently.
//
static Type closure_invocation_type;
static Type closure_queried_type;
static Type closure_start_type;
//
// The assembly that defines the type is that is calling us
//
static Assembly closure_invocation_assembly;
//
// This filter filters by name + whether it is ok to include private
// members in the search
//
static internal bool FilterWithClosure (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 ((closure_start_type == closure_invocation_type) &&
(m.DeclaringType == closure_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.Private)
return closure_private_ok || (closure_invocation_type == m.DeclaringType);
//
// FamAndAssem requires that we not only derivate, but we are on the
// same assembly.
//
if (ma == MethodAttributes.FamANDAssem){
if (closure_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 (closure_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 (closure_invocation_type == null)
return false;
if (!IsSubclassOrNestedChildOf (closure_invocation_type, mb.DeclaringType))
return false;
return true;
}
// Public.
return true;
}
if (m is FieldInfo){
FieldInfo fi = (FieldInfo) m;
FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
if (fa == FieldAttributes.Private)
return closure_private_ok || (closure_invocation_type == m.DeclaringType);
//
// FamAndAssem requires that we not only derivate, but we are on the
// same assembly.
//
if (fa == FieldAttributes.FamANDAssem){
if (closure_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 (closure_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 (closure_invocation_type == null)
return false;
if (!IsSubclassOrNestedChildOf (closure_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 ((closure_invocation_type != closure_start_type) &&
closure_invocation_type.IsSubclassOf (closure_start_type))
return false;
return true;
}
// Public.
return true;
}
//
// EventInfos and PropertyInfos, return true
//
return true;
}
static MemberFilter FilterWithClosure_delegate = new MemberFilter (FilterWithClosure);
//
// 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'.
//
// The binding flags are 'bf' and the kind of members being looked up are 'mt'
//
// 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 queried_type,
MemberTypes mt, BindingFlags original_bf, string name)
{
Timer.StartTimer (TimerType.MemberLookup);
MemberInfo[] retval = RealMemberLookup (invocation_type, queried_type,
mt, original_bf, name);
Timer.StopTimer (TimerType.MemberLookup);
return retval;
}
static MemberInfo [] RealMemberLookup (Type invocation_type, Type queried_type,
MemberTypes mt, BindingFlags original_bf, string name)
{
BindingFlags bf = original_bf;
ArrayList method_list = null;
Type current_type = queried_type;
if (queried_type == null)
throw new ArgumentNullException("queried_type");
bool searching = (original_bf & BindingFlags.DeclaredOnly) == 0;
bool private_ok;
bool always_ok_flag = false;
bool skip_iface_check = true, used_cache = false;
closure_name = name;
closure_invocation_type = invocation_type;
closure_invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
closure_start_type = queried_type;
//
// 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.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;
}
}
}
do {
MemberList 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){
if (invocation_type == current_type){
private_ok = (bf & BindingFlags.NonPublic) != 0;
} else
private_ok = always_ok_flag;
if (invocation_type.IsSubclassOf (current_type))
private_ok = true;
if (private_ok)
bf = original_bf | BindingFlags.NonPublic;
} else {
private_ok = false;
bf = original_bf & ~BindingFlags.NonPublic;
}
closure_private_ok = private_ok;
closure_queried_type = current_type;
Timer.StopTimer (TimerType.MemberLookup);
bf |= BindingFlags.IgnoreCase;
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.Count == 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.Count == 1 && !(list [0] is MethodBase)){
return (MemberInfo []) list;
}
//
// Multiple properties: we query those just to find out the indexer
// name
//
if (list [0] is PropertyInfo)
return (MemberInfo []) list;
//
// We found methods, turn the search into "method scan"
// mode.
//
method_list = CopyNewMethods (method_list, list);
mt &= (MemberTypes.Method | MemberTypes.Constructor);
} while (searching);
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, itype, mt, bf, name);
if (x != null)
return x;
}
return null;
}
#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;
}
///
/// 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 bool is_interface;
private MemberCache member_cache;
private TypeHandle (Type type)
{
this.type = type;
if (type.BaseType != null)
BaseType = GetTypeHandle (type.BaseType);
else if ((type != TypeManager.object_type) && (type != typeof (object)))
is_interface = true;
this.member_cache = new MemberCache (this);
}
// IMemberContainer methods
public string Name {
get {
return type.FullName;
}
}
public Type Type {
get {
return type;
}
}
public IMemberContainer Parent {
get {
return BaseType;
}
}
public bool IsInterface {
get {
return is_interface;
}
}
public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
{
if (mt == MemberTypes.Event)
return new MemberList (type.GetEvents (bf | BindingFlags.DeclaredOnly));
else
return new MemberList (type.FindMembers (mt, bf | BindingFlags.DeclaredOnly | BindingFlags.IgnoreCase,
null, null));
}
// IMemberFinder methods
public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
MemberFilter filter, object criteria)
{
return 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 + ")";
}
}
}