}
}
+ public Constraints Clone ()
+ {
+ return new Constraints (name, constraints, loc);
+ }
+
GenericParameterAttributes attrs;
TypeExpr class_constraint;
ArrayList iface_constraints;
foreach (object obj in constraints) {
if (HasConstructorConstraint) {
Report.Error (401, loc,
- "The new() constraint must be last.");
+ "The new() constraint must be the last constraint specified");
return false;
}
continue;
}
- Report.Error (
- 451, loc, "The new () constraint " +
- "cannot be used with the `struct' " +
- "constraint.");
+ Report.Error (451, loc, "The `new()' constraint " +
+ "cannot be used with the `struct' constraint");
return false;
}
if ((num_constraints > 0) || HasReferenceTypeConstraint || HasValueTypeConstraint) {
- Report.Error (449, loc,
- "The `class' or `struct' " +
- "constraint must be first");
+ Report.Error (449, loc, "The `class' or `struct' " +
+ "constraint must be the first constraint specified");
return false;
}
if (errors != Report.Errors)
return false;
- Report.Error (246, loc, "Cannot find type '{0}'", ((Expression) obj).GetSignatureForError ());
+ NamespaceEntry.Error_NamespaceNotFound (loc, ((Expression)obj).GetSignatureForError ());
return false;
}
expr = cexpr;
} else
- expr = fn.ResolveAsTypeTerminal (ec, false);
+ expr = ((Expression) obj).ResolveAsTypeTerminal (ec, false);
if ((expr == null) || (expr.Type == null))
return false;
+ // TODO: It's aleady done in ResolveAsBaseTerminal
+ if (!ec.GenericDeclContainer.AsAccessible (fn.Type, ec.GenericDeclContainer.ModFlags)) {
+ Report.SymbolRelatedToPreviousError (fn.Type);
+ Report.Error (703, loc,
+ "Inconsistent accessibility: constraint type `{0}' is less accessible than `{1}'",
+ fn.GetSignatureForError (), ec.GenericDeclContainer.GetSignatureForError ());
+ return false;
+ }
+
TypeParameterExpr texpr = expr as TypeParameterExpr;
if (texpr != null)
type_param_constraints.Add (expr);
} else if (HasReferenceTypeConstraint || HasValueTypeConstraint) {
Report.Error (450, loc, "`{0}': cannot specify both " +
"a constraint class and the `class' " +
- "or `struct' constraint.", expr.Name);
+ "or `struct' constraint", expr.GetSignatureForError ());
return false;
} else
class_constraint = expr;
return false;
if (class_constraint_type.IsSealed) {
- Report.Error (701, loc,
- "`{0}' is not a valid bound. Bounds " +
- "must be interfaces or non sealed " +
- "classes", TypeManager.CSharpName (class_constraint_type));
+ if (class_constraint_type.IsAbstract)
+ {
+ Report.Error (717, loc, "`{0}' is not a valid constraint. Static classes cannot be used as constraints",
+ TypeManager.CSharpName (class_constraint_type));
+ }
+ else
+ {
+ Report.Error (701, loc, "`{0}' is not a valid constraint. A constraint must be an interface, " +
+ "a non-sealed class or a type parameter", TypeManager.CSharpName(class_constraint_type));
+ }
return false;
}
return false;
}
+ public Location Location {
+ get {
+ return loc;
+ }
+ }
+
/// <summary>
/// This is used when we're implementing a generic interface method.
/// Each method type parameter in implementing method must have the same
return true;
}
+
+ public void VerifyClsCompliance ()
+ {
+ if (class_constraint_type != null && !AttributeTester.IsClsCompliant (class_constraint_type))
+ Warning_ConstrainIsNotClsCompliant (class_constraint_type, class_constraint.Location);
+
+ if (iface_constraint_types != null) {
+ for (int i = 0; i < iface_constraint_types.Length; ++i) {
+ if (!AttributeTester.IsClsCompliant (iface_constraint_types [i]))
+ Warning_ConstrainIsNotClsCompliant (iface_constraint_types [i],
+ ((TypeExpr)iface_constraints [i]).Location);
+ }
+ }
+ }
+
+ void Warning_ConstrainIsNotClsCompliant (Type t, Location loc)
+ {
+ Report.SymbolRelatedToPreviousError (t);
+ Report.Warning (3024, 1, loc, "Constraint type `{0}' is not CLS-compliant",
+ TypeManager.CSharpName (t));
+ }
}
/// <summary>
Constraints constraints;
Location loc;
GenericTypeParameterBuilder type;
+ MemberCache member_cache;
public TypeParameter (DeclSpace parent, DeclSpace decl, string name,
Constraints constraints, Attributes attrs, Location loc)
}
public GenericConstraints GenericConstraints {
- get {
- return gc != null ? gc : constraints;
- }
+ get { return gc != null ? gc : constraints; }
}
public Constraints Constraints {
- get {
- return constraints;
- }
- }
-
- public bool HasConstructorConstraint {
- get {
- if (constraints != null)
- return constraints.HasConstructorConstraint;
-
- return false;
- }
+ get { return constraints; }
}
public DeclSpace DeclSpace {
- get {
- return decl;
- }
+ get { return decl; }
}
public Type Type {
- get {
- return type;
- }
- }
-
- // FIXME: This should be removed once we fix the handling of RootContext.Tree.Types
- public override DeclSpace DeclContainer {
- get { return DeclSpace; }
+ get { return type; }
}
/// <summary>
if (implementing != null) {
if (is_override && (constraints != null)) {
- Report.Error (
- 460, loc, "Constraints for override and " +
- "explicit interface implementation methods " +
- "are inherited from the base method so they " +
- "cannot be specified directly");
+ Report.Error (460, loc,
+ "`{0}': Cannot specify constraints for overrides or explicit interface implementation methods",
+ TypeManager.CSharpSignature (builder));
return false;
}
TypeManager.CSharpName (mparam), TypeManager.CSharpSignature (mb));
return false;
}
- } else if (DeclSpace is Iterator) {
+ } else if (DeclSpace is CompilerGeneratedClass) {
TypeParameter[] tparams = DeclSpace.TypeParameters;
Type[] types = new Type [tparams.Length];
for (int i = 0; i < tparams.Length; i++)
}
MemberCache IMemberContainer.BaseCache {
- get { return null; }
+ get {
+ if (gc == null)
+ return null;
+
+ if (gc.EffectiveBaseClass.BaseType == null)
+ return null;
+
+ return TypeManager.LookupMemberCache (gc.EffectiveBaseClass.BaseType);
+ }
}
bool IMemberContainer.IsInterface {
- get { return true; }
+ get { return false; }
}
MemberList IMemberContainer.GetMembers (MemberTypes mt, BindingFlags bf)
return FindMembers (mt, bf, null, null);
}
- MemberCache IMemberContainer.MemberCache {
- get { return null; }
+ public MemberCache MemberCache {
+ get {
+ if (member_cache != null)
+ return member_cache;
+
+ if (gc == null)
+ return null;
+
+ Type[] ifaces = TypeManager.ExpandInterfaces (gc.InterfaceConstraints);
+ member_cache = new MemberCache (this, gc.EffectiveBaseClass, ifaces);
+
+ return member_cache;
+ }
}
public MemberList FindMembers (MemberTypes mt, BindingFlags bf,
MemberFilter filter, object criteria)
{
- if (constraints == null)
+ if (gc == null)
return MemberList.Empty;
ArrayList members = new ArrayList ();
bool has_class_constr = false;
if (list.Count > 0) {
Type first = (Type) list [0];
- has_class_constr = !first.IsInterface && !first.IsGenericParameter;
+ has_class_constr = !first.IsGenericParameter && !first.IsInterface;
}
if ((list.Count > 0) && has_class_constr) {
this.Location = loc;
}
+ public TypeArguments (Location loc, params Expression[] types)
+ {
+ this.Location = loc;
+ this.args = new ArrayList (types);
+ }
+
public TypeArguments (int dimension, Location loc)
{
this.dimension = dimension;
return s.ToString ();
}
+ public string GetSignatureForError()
+ {
+ StringBuilder sb = new StringBuilder();
+ for (int i = 0; i < Count; ++i)
+ {
+ Expression expr = (Expression)args [i];
+ sb.Append(expr.GetSignatureForError());
+ if (i + 1 < Count)
+ sb.Append(',');
+ }
+ return sb.ToString();
+ }
+
/// <summary>
/// Resolve the type arguments.
/// </summary>
ok = false;
continue;
}
- if (te is TypeParameterExpr)
- has_type_args = true;
+
+ atypes[i] = te.Type;
+ if (te.Type.IsGenericParameter) {
+ if (te is TypeParameterExpr)
+ has_type_args = true;
+ continue;
+ }
+
+ if (te.Type.IsSealed && te.Type.IsAbstract) {
+ Report.Error (718, Location, "`{0}': static classes cannot be used as generic arguments",
+ te.GetSignatureForError ());
+ return false;
+ }
if (te.Type.IsPointer) {
Report.Error (306, Location, "The type `{0}' may not be used " +
- "as a type argument.", TypeManager.CSharpName (te.Type));
- return false;
- } else if (te.Type == TypeManager.void_type) {
- Report.Error (1547, Location,
- "Keyword `void' cannot be used in this context");
+ "as a type argument", TypeManager.CSharpName (te.Type));
return false;
}
- atypes [i] = te.Type;
+ if (te.Type == TypeManager.void_type) {
+ Expression.Error_VoidInvalidInTheContext (Location);
+ return false;
+ }
}
return ok;
}
+
+ public TypeArguments Clone ()
+ {
+ TypeArguments copy = new TypeArguments (Location);
+ foreach (Expression ta in args)
+ copy.args.Add (ta);
+
+ return copy;
+ }
}
public class TypeParameterName : SimpleName
public override string GetSignatureForError ()
{
- return TypeManager.CSharpName (gt);
+ return TypeManager.RemoveGenericArity (gt.FullName) + "<" + args.GetSignatureForError () + ">";
}
protected override TypeExpr DoResolveAsTypeStep (IResolveContext ec)
public override bool AsAccessible (DeclSpace ds, int flags)
{
+ foreach (Type t in atypes) {
+ if (!ds.AsAccessible (t, flags))
+ return false;
+ }
+
return ds.AsAccessible (gt, flags);
}
}
}
-
public override string FullName {
get {
return full_name;
if (agc != null) {
if (agc is Constraints)
((Constraints) agc).Resolve (ec);
- is_class = agc.HasReferenceTypeConstraint;
- is_struct = agc.HasValueTypeConstraint;
+ is_class = agc.IsReferenceType;
+ is_struct = agc.IsValueType;
} else {
is_class = is_struct = false;
}
if (TypeManager.IsBuiltinType (atype) || atype.IsValueType)
return true;
- if (HasDefaultConstructor (ec.DeclContainer.TypeBuilder, atype))
+ if (HasDefaultConstructor (atype))
return true;
Report_SymbolRelatedToPreviousError ();
return false;
}
- bool HasDefaultConstructor (Type containerType, Type atype)
+ bool HasDefaultConstructor (Type atype)
{
if (atype.IsAbstract)
return false;
}
TypeParameter tparam = TypeManager.LookupTypeParameter (atype);
- if (tparam != null)
- return tparam.HasConstructorConstraint;
+ if (tparam != null) {
+ if (tparam.GenericConstraints == null)
+ return false;
+ else
+ return tparam.GenericConstraints.HasConstructorConstraint;
+ }
MemberList list = TypeManager.FindMembers (
atype, MemberTypes.Constructor,
/// Define and resolve the type parameters.
/// We're called from Method.Define().
/// </summary>
- public bool Define (MethodBuilder mb)
+ public bool Define (MethodBuilder mb, ToplevelBlock block)
{
- GenericTypeParameterBuilder[] gen_params;
TypeParameterName[] names = MemberName.TypeArguments.GetDeclarations ();
string[] snames = new string [names.Length];
- for (int i = 0; i < names.Length; i++)
- snames [i] = names [i].Name;
- gen_params = mb.DefineGenericParameters (snames);
+ for (int i = 0; i < names.Length; i++) {
+ string type_argument_name = names[i].Name;
+ Parameter p = parameters.GetParameterByName (type_argument_name);
+ if (p != null) {
+ Error_ParameterNameCollision (p.Location, type_argument_name, "method parameter");
+ return false;
+ }
+
+ // FIXME: This is wrong, since it only looks at the outermost set of variables
+ if (block != null) {
+ LocalInfo li = (LocalInfo)block.Variables [type_argument_name];
+ if (li != null) {
+ Error_ParameterNameCollision (li.Location, type_argument_name, "local variable");
+ return false;
+ }
+ }
+ snames[i] = type_argument_name;
+ }
+
+ GenericTypeParameterBuilder[] gen_params = mb.DefineGenericParameters (snames);
for (int i = 0; i < TypeParameters.Length; i++)
TypeParameters [i].Define (gen_params [i]);
return true;
}
+ static void Error_ParameterNameCollision (Location loc, string name, string collisionWith)
+ {
+ Report.Error (412, loc, "The type parameter name `{0}' is the same as `{1}'",
+ name, collisionWith);
+ }
+
/// <summary>
/// We're called from MethodData.Define() after creating the MethodBuilder.
/// </summary>
}
}
- public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
- {
- base.ApplyAttributeBuilder (a, cb);
- }
-
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Method | AttributeTargets.ReturnValue;
public override string DocCommentHeader {
get { return "M:"; }
}
+
+ public new void VerifyClsCompliance ()
+ {
+ foreach (TypeParameter tp in TypeParameters) {
+ if (tp.Constraints == null)
+ continue;
+
+ tp.Constraints.VerifyClsCompliance ();
+ }
+ }
}
public class DefaultValueExpression : Expression
type = texpr.Type;
+ if (type == TypeManager.void_type) {
+ Error_VoidInvalidInTheContext (loc);
+ return null;
+ }
+
+ if (type.IsGenericParameter)
+ {
+ GenericConstraints constraints = TypeManager.GetTypeParameterConstraints(type);
+ if (constraints != null && constraints.IsReferenceType)
+ return new NullDefault (new NullLiteral (Location), type);
+ }
+ else
+ {
+ Constant c = New.Constantify(type);
+ if (c != null)
+ return new NullDefault (c, type);
+
+ if (!TypeManager.IsValueType (type))
+ return new NullDefault (new NullLiteral (Location), type);
+ }
eclass = ExprClass.Variable;
return this;
}
public override void Emit (EmitContext ec)
{
- if (type.IsGenericParameter || TypeManager.IsValueType (type)) {
- LocalTemporary temp_storage = new LocalTemporary (type);
+ LocalTemporary temp_storage = new LocalTemporary(type);
- temp_storage.AddressOf (ec, AddressOp.LoadStore);
- ec.ig.Emit (OpCodes.Initobj, type);
- temp_storage.Emit (ec);
- } else
- ec.ig.Emit (OpCodes.Ldnull);
+ temp_storage.AddressOf(ec, AddressOp.LoadStore);
+ ec.ig.Emit(OpCodes.Initobj, type);
+ temp_storage.Emit(ec);
}
}
// A list of core types that the compiler requires or uses
//
static public Type activator_type;
+ static public Type generic_ilist_type;
+ static public Type generic_icollection_type;
static public Type generic_ienumerator_type;
static public Type generic_ienumerable_type;
static public Type generic_nullable_type;
- // <remarks>
- // Tracks the generic parameters.
- // </remarks>
- static PtrHashtable builder_to_type_param;
-
//
// These methods are called by code generated by the compiler
//
static public MethodInfo activator_create_instance;
- static void InitGenerics ()
- {
- builder_to_type_param = new PtrHashtable ();
- }
-
- static void CleanUpGenerics ()
- {
- builder_to_type_param = null;
- }
-
static void InitGenericCoreTypes ()
{
activator_type = CoreLookupType ("System", "Activator");
+ generic_ilist_type = CoreLookupType (
+ "System.Collections.Generic", "IList", 1);
+ generic_icollection_type = CoreLookupType (
+ "System.Collections.Generic", "ICollection", 1);
generic_ienumerator_type = CoreLookupType (
"System.Collections.Generic", "IEnumerator", 1);
generic_ienumerable_type = CoreLookupType (
static void InitGenericCodeHelpers ()
{
// Activator
- Type [] type_arg = { type_type };
activator_create_instance = GetMethod (
- activator_type, "CreateInstance", type_arg);
+ activator_type, "CreateInstance", Type.EmptyTypes);
}
static Type CoreLookupType (string ns, string name, int arity)
return CoreLookupType (ns, MemberName.MakeName (name, arity));
}
- public static void AddTypeParameter (Type t, TypeParameter tparam)
- {
- if (!builder_to_type_param.Contains (t))
- builder_to_type_param.Add (t, tparam);
- }
-
public static TypeContainer LookupGenericTypeContainer (Type t)
{
t = DropGenericTypeArguments (t);
return LookupTypeContainer (t);
}
- public static TypeParameter LookupTypeParameter (Type t)
- {
- return (TypeParameter) builder_to_type_param [t];
- }
-
public static GenericConstraints GetTypeParameterConstraints (Type t)
{
if (!t.IsGenericParameter)
return ReflectionConstraints.GetConstraints (t);
}
- public static bool HasGenericArguments (Type t)
- {
- return GetNumberOfTypeArguments (t) > 0;
- }
-
- public static int GetNumberOfTypeArguments (Type t)
- {
- if (t.IsGenericParameter)
- return 0;
- DeclSpace tc = LookupDeclSpace (t);
- if (tc != null)
- return tc.IsGeneric ? tc.CountTypeParameters : 0;
- else
- return t.IsGenericType ? t.GetGenericArguments ().Length : 0;
- }
-
- public static Type[] GetTypeArguments (Type t)
- {
- DeclSpace tc = LookupDeclSpace (t);
- if (tc != null) {
- if (!tc.IsGeneric)
- return Type.EmptyTypes;
-
- TypeParameter[] tparam = tc.TypeParameters;
- Type[] ret = new Type [tparam.Length];
- for (int i = 0; i < tparam.Length; i++) {
- ret [i] = tparam [i].Type;
- if (ret [i] == null)
- throw new InternalErrorException ();
- }
-
- return ret;
- } else
- return t.GetGenericArguments ();
- }
-
- public static Type DropGenericTypeArguments (Type t)
- {
- if (!t.IsGenericType)
- return t;
- // Micro-optimization: a generic typebuilder is always a generic type definition
- if (t is TypeBuilder)
- return t;
- return t.GetGenericTypeDefinition ();
- }
-
- public static MethodBase DropGenericMethodArguments (MethodBase m)
- {
- if (m.IsGenericMethodDefinition)
- return m;
- if (m.IsGenericMethod)
- return ((MethodInfo) m).GetGenericMethodDefinition ();
- if (!m.DeclaringType.IsGenericType)
- return m;
-
- Type t = m.DeclaringType.GetGenericTypeDefinition ();
- BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
- BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
-
- if (m is ConstructorInfo) {
- foreach (ConstructorInfo c in t.GetConstructors (bf))
- if (c.MetadataToken == m.MetadataToken)
- return c;
- } else {
- foreach (MethodBase mb in t.GetMethods (bf))
- if (mb.MetadataToken == m.MetadataToken)
- return mb;
- }
-
- return m;
- }
-
- public static FieldInfo GetGenericFieldDefinition (FieldInfo fi)
- {
- if (fi.DeclaringType.IsGenericTypeDefinition ||
- !fi.DeclaringType.IsGenericType)
- return fi;
-
- Type t = fi.DeclaringType.GetGenericTypeDefinition ();
- BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
- BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
-
- foreach (FieldInfo f in t.GetFields (bf))
- if (f.MetadataToken == fi.MetadataToken)
- return f;
-
- return fi;
- }
-
- //
- // Whether `array' is an array of T and `enumerator' is `IEnumerable<T>'.
- // For instance "string[]" -> "IEnumerable<string>".
- //
- public static bool IsIEnumerable (Type array, Type enumerator)
- {
- if (!array.IsArray || !enumerator.IsGenericType)
- return false;
-
- if (enumerator.GetGenericTypeDefinition () != generic_ienumerable_type)
- return false;
-
- Type[] args = GetTypeArguments (enumerator);
- return args [0] == GetElementType (array);
- }
-
- public static bool IsEqual (Type a, Type b)
- {
- if (a.Equals (b))
- return true;
-
- if (a.IsGenericParameter && b.IsGenericParameter) {
- if (a.DeclaringMethod != b.DeclaringMethod &&
- (a.DeclaringMethod == null || b.DeclaringMethod == null))
- return false;
- return a.GenericParameterPosition == b.GenericParameterPosition;
- }
-
- if (a.IsArray && b.IsArray) {
- if (a.GetArrayRank () != b.GetArrayRank ())
- return false;
- return IsEqual (a.GetElementType (), b.GetElementType ());
- }
-
- if (a.IsByRef && b.IsByRef)
- return IsEqual (a.GetElementType (), b.GetElementType ());
-
- if (a.IsGenericType && b.IsGenericType) {
- 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;
- }
-
- //
- // This is to build with the broken circular dependencies between
- // System and System.Configuration in the 2.x profile where we
- // end up with a situation where:
- //
- // System on the second build is referencing the System.Configuration
- // that has references to the first System build.
- //
- // Point in case: NameValueCollection built on the first pass, vs
- // NameValueCollection build on the second one. The problem is that
- // we need to override some methods sometimes, or we need to
- //
- if (RootContext.BrokenCircularDeps){
- if (a.Name == b.Name && a.Namespace == b.Namespace){
- Console.WriteLine ("GonziMatch: {0}.{1}", a.Namespace, a.Name);
- return true;
- }
- }
- return false;
- }
-
/// <summary>
/// Check whether `a' and `b' may become equal generic types.
/// The algorithm to do that is a little bit complicated.
/// </summary>
- public static bool MayBecomeEqualGenericTypes (Type a, Type b, Type[] class_infered,
- Type[] method_infered)
+ public static bool MayBecomeEqualGenericTypes (Type a, Type b, Type[] class_inferred,
+ Type[] method_inferred)
{
if (a.IsGenericParameter) {
//
//
if (b.IsGenericParameter || !b.IsGenericType) {
int pos = a.GenericParameterPosition;
- Type[] args = a.DeclaringMethod != null ? method_infered : class_infered;
+ Type[] args = a.DeclaringMethod != null ? method_inferred : class_inferred;
if (args [pos] == null) {
args [pos] = b;
return true;
}
if (b.IsGenericParameter)
- return MayBecomeEqualGenericTypes (b, a, class_infered, method_infered);
+ return MayBecomeEqualGenericTypes (b, a, class_inferred, method_inferred);
//
// At this point, neither a nor b are a type parameter.
//
if (a.IsGenericType || b.IsGenericType)
- return MayBecomeEqualGenericInstances (a, b, class_infered, method_infered);
+ return MayBecomeEqualGenericInstances (a, b, class_inferred, method_inferred);
//
// If both of them are arrays.
a = a.GetElementType ();
b = b.GetElementType ();
- return MayBecomeEqualGenericTypes (a, b, class_infered, method_infered);
+ return MayBecomeEqualGenericTypes (a, b, class_inferred, method_inferred);
}
//
// particular instantiation (26.3.1).
//
public static bool MayBecomeEqualGenericInstances (Type a, Type b,
- Type[] class_infered,
- Type[] method_infered)
+ Type[] class_inferred,
+ Type[] method_inferred)
{
if (!a.IsGenericType || !b.IsGenericType)
return false;
return false;
return MayBecomeEqualGenericInstances (
- GetTypeArguments (a), GetTypeArguments (b), class_infered, method_infered);
+ GetTypeArguments (a), GetTypeArguments (b), class_inferred, method_inferred);
}
public static bool MayBecomeEqualGenericInstances (Type[] aargs, Type[] bargs,
- Type[] class_infered,
- Type[] method_infered)
+ Type[] class_inferred,
+ Type[] method_inferred)
{
if (aargs.Length != bargs.Length)
return false;
for (int i = 0; i < aargs.Length; i++) {
- if (!MayBecomeEqualGenericTypes (aargs [i], bargs [i], class_infered, method_infered))
+ if (!MayBecomeEqualGenericTypes (aargs [i], bargs [i], class_inferred, method_inferred))
return false;
}
return true;
}
- /// <summary>
- /// Check whether `type' and `parent' are both instantiations of the same
- /// generic type. Note that we do not check the type parameters here.
- /// </summary>
- public static bool IsInstantiationOfSameGenericType (Type type, Type parent)
- {
- int tcount = GetNumberOfTypeArguments (type);
- int pcount = GetNumberOfTypeArguments (parent);
-
- if (tcount != pcount)
- return false;
-
- type = DropGenericTypeArguments (type);
- parent = DropGenericTypeArguments (parent);
-
- return type.Equals (parent);
- }
-
- /// <summary>
- /// Whether `mb' is a generic method definition.
- /// </summary>
- public static bool IsGenericMethodDefinition (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;
- }
-
- /// <summary>
- /// Whether `mb' is a generic method definition.
- /// </summary>
- public static 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.IsGenericMethod;
- }
-
- //
- // Type inference.
- //
-
- static bool InferType (Type pt, Type at, Type[] infered)
+ static bool UnifyType (Type pt, Type at, Type[] inferred)
{
if (pt.IsGenericParameter) {
if (pt.DeclaringMethod == null)
int pos = pt.GenericParameterPosition;
- if (infered [pos] == null) {
- infered [pos] = at;
- return true;
- }
-
- if (infered [pos] != at)
- return false;
+ if (inferred [pos] == null)
+ inferred [pos] = at;
- return true;
+ return inferred [pos] == at;
}
if (!pt.ContainsGenericParameters) {
if (at.ContainsGenericParameters)
- return InferType (at, pt, infered);
+ return UnifyType (at, pt, inferred);
else
return true;
}
if (at.GetArrayRank () != pt.GetArrayRank ())
return false;
- return InferType (pt.GetElementType (), at.GetElementType (), infered);
+ return UnifyType (pt.GetElementType (), at.GetElementType (), inferred);
}
- if (!pt.IsGenericType ||
- (pt.GetGenericTypeDefinition () != generic_ienumerable_type))
- return false;
+ if (!pt.IsGenericType)
+ return false;
+
+ Type gt = pt.GetGenericTypeDefinition ();
+ if ((gt != generic_ilist_type) && (gt != generic_icollection_type) &&
+ (gt != generic_ienumerable_type))
+ return false;
Type[] args = GetTypeArguments (pt);
- return InferType (args [0], at.GetElementType (), infered);
+ return UnifyType (args [0], at.GetElementType (), inferred);
}
if (pt.IsArray) {
(pt.GetArrayRank () != at.GetArrayRank ()))
return false;
- return InferType (pt.GetElementType (), at.GetElementType (), infered);
+ return UnifyType (pt.GetElementType (), at.GetElementType (), inferred);
}
if (pt.IsByRef && at.IsByRef)
- return InferType (pt.GetElementType (), at.GetElementType (), infered);
+ return UnifyType (pt.GetElementType (), at.GetElementType (), inferred);
ArrayList list = new ArrayList ();
if (at.IsGenericType)
list.Add (at);
list.AddRange (TypeManager.GetInterfaces (at));
- bool found_one = false;
-
foreach (Type type in list) {
if (!type.IsGenericType)
continue;
- Type[] infered_types = new Type [infered.Length];
-
- if (!InferGenericInstance (pt, type, infered_types))
+ if (DropGenericTypeArguments (pt) != DropGenericTypeArguments (type))
continue;
- for (int i = 0; i < infered_types.Length; i++) {
- if (infered [i] == null) {
- infered [i] = infered_types [i];
- continue;
- }
-
- if (infered [i] != infered_types [i])
- return false;
- }
-
- found_one = true;
+ if (!UnifyTypes (pt.GetGenericArguments (), type.GetGenericArguments (), inferred))
+ return false;
}
- return found_one;
+ return true;
}
- static bool InferGenericInstance (Type pt, Type at, Type[] infered_types)
+ static bool UnifyTypes (Type[] pts, Type [] ats, Type [] inferred)
{
- Type[] at_args = at.GetGenericArguments ();
- Type[] pt_args = pt.GetGenericArguments ();
-
- if (at_args.Length != pt_args.Length)
- return false;
-
- for (int i = 0; i < at_args.Length; i++) {
- if (!InferType (pt_args [i], at_args [i], infered_types))
+ for (int i = 0; i < ats.Length; i++) {
+ if (!UnifyType (pts [i], ats [i], inferred))
return false;
}
-
- for (int i = 0; i < infered_types.Length; i++) {
- if (infered_types [i] == null)
- return false;
- }
-
return true;
}
public static bool InferParamsTypeArguments (EmitContext ec, ArrayList arguments,
ref MethodBase method)
{
- if ((arguments == null) || !TypeManager.IsGenericMethod (method))
+ if (!TypeManager.IsGenericMethod (method))
return true;
- int arg_count;
-
- if (arguments == null)
- arg_count = 0;
- else
- arg_count = arguments.Count;
-
- ParameterData pd = TypeManager.GetParameterData (method);
+ // if there are no arguments, there's no way to infer the type-arguments
+ if (arguments == null || arguments.Count == 0)
+ return false;
+ ParameterData pd = TypeManager.GetParameterData (method);
int pd_count = pd.Count;
+ int arg_count = arguments.Count;
if (pd_count == 0)
return false;
-
+
if (pd.ParameterModifier (pd_count - 1) != Parameter.Modifier.PARAMS)
return false;
-
+
if (pd_count - 1 > arg_count)
return false;
-
- if (pd_count == 1 && arg_count == 0)
- return true;
Type[] method_args = method.GetGenericArguments ();
- Type[] infered_types = new Type [method_args.Length];
+ Type[] inferred_types = new Type [method_args.Length];
//
// If we have come this far, the case which
Type pt = pd.ParameterType (i);
Type at = a.Type;
- if (!InferType (pt, at, infered_types))
+ if (!UnifyType (pt, at, inferred_types))
return false;
}
if ((a.Expr is NullLiteral) || (a.Expr is MethodGroupExpr))
continue;
- if (!InferType (element_type, a.Type, infered_types))
+ if (!UnifyType (element_type, a.Type, inferred_types))
return false;
}
- for (int i = 0; i < infered_types.Length; i++)
- if (infered_types [i] == null)
+ for (int i = 0; i < inferred_types.Length; i++)
+ if (inferred_types [i] == null)
return false;
- method = ((MethodInfo)method).MakeGenericMethod (infered_types);
+ method = ((MethodInfo)method).MakeGenericMethod (inferred_types);
return true;
}
static bool InferTypeArguments (Type[] param_types, Type[] arg_types,
- Type[] infered_types)
+ Type[] inferred_types)
{
- if (infered_types == null)
- return false;
-
for (int i = 0; i < arg_types.Length; i++) {
if (arg_types [i] == null)
continue;
- if (!InferType (param_types [i], arg_types [i], infered_types))
+ if (!UnifyType (param_types [i], arg_types [i], inferred_types))
return false;
}
- for (int i = 0; i < infered_types.Length; i++)
- if (infered_types [i] == null)
+ for (int i = 0; i < inferred_types.Length; ++i)
+ if (inferred_types [i] == null)
return false;
return true;
}
+ //
+ // Infers the type of a single LambdaExpression in the invocation call and
+ // stores the infered type in the inferred_types array.
+ //
+ // The index of the arguments that contain lambdas is passed in
+ //
+ // @lambdas. Merely to avoid rescanning the list.
+ //
+ // The method being called:
+ // @method_generic_args: The generic type arguments for the method being called
+ // @method_pd: The ParameterData for the method being called.
+ //
+ // The call site:
+ // @arguments: Arraylist of Argument()s. The arguments being passed.
+ //
+ // Returns:
+ // @inferred_types: the array that is populated with our results.
+ //
+ // true if the code was able to do one inference.
+ //
+ static bool LambdaInfer (EmitContext ec,
+ Type [] method_generic_args,
+ ParameterData method_pd,
+ ArrayList arguments,
+ Type[] inferred_types,
+ ArrayList lambdas)
+ {
+ int last_count = lambdas.Count;
+
+ for (int i = 0; i < last_count; i++){
+ int argn = (int) lambdas [i];
+
+ Argument a = (Argument) arguments [argn];
+
+ LambdaExpression le = a.Expr as LambdaExpression;
+
+ if (le == null)
+ throw new Exception (
+ String.Format ("Internal Compiler error: argument {0} should be a Lambda Expression",
+ argn));
+
+ //
+ // "The corresponding parameter’s type, in the
+ // following called P, is a delegate type with a
+ // return type that involves one or more method type
+ // parameters."
+ //
+ //
+ if (!TypeManager.IsDelegateType (method_pd.ParameterType (argn)))
+ goto useless_lambda;
+
+ Type p_type = method_pd.ParameterType (argn);
+ MethodGroupExpr method_group = Expression.MemberLookup (
+ ec.ContainerType, p_type, "Invoke", MemberTypes.Method,
+ Expression.AllBindingFlags, Location.Null) as MethodGroupExpr;
+
+ if (method_group == null){
+ // This we report elsewhere as -200, but here we can ignore
+ goto useless_lambda;
+ }
+ MethodInfo p_delegate_method = method_group.Methods [0] as MethodInfo;
+ if (p_delegate_method == null){
+ // This should not happen.
+ goto useless_lambda;
+ }
+
+ Type p_return_type = p_delegate_method.ReturnType;
+ if (!p_return_type.IsGenericParameter)
+ goto useless_lambda;
+
+ //
+ // P and L have the same number of parameters, and
+ // each parameter in P has the same modifiers as the
+ // corresponding parameter in L, or no modifiers if
+ // L has an implicitly typed parameter list.
+ //
+ ParameterData p_delegate_parameters = TypeManager.GetParameterData (p_delegate_method);
+ int p_delegate_parameter_count = p_delegate_parameters.Count;
+ if (p_delegate_parameter_count != le.Parameters.Count)
+ goto useless_lambda;
+
+ if (le.HasExplicitParameters){
+ for (int j = 0; j < p_delegate_parameter_count; j++){
+ if (p_delegate_parameters.ParameterModifier (j) !=
+ le.Parameters.ParameterModifier (j))
+ goto useless_lambda;
+ }
+ } else {
+ for (int j = 0; j < p_delegate_parameter_count; j++)
+ if (le.Parameters.ParameterModifier (j) != Parameter.Modifier.NONE)
+ goto useless_lambda;
+ }
+
+ //
+ // TODO: P’s parameter types involve no method type
+ // parameters or involve only method type parameters
+ // for which a consistent set of inferences have
+ // already been made.
+ //
+ //Console.WriteLine ("Method: {0}", p_delegate_method);
+ //for (int j = 0; j < p_delegate_parameter_count; j++){
+ //Console.WriteLine ("PType [{2}, {0}] = {1}", j, p_delegate_parameters.ParameterType (j), argn);
+ //}
+
+ //
+ // At this point we know that P has method type parameters
+ // that involve only type parameters that have a consistent
+ // set of inferences made.
+ //
+ if (le.HasExplicitParameters){
+ //
+ // TODO: If L has an explicitly typed parameter
+ // list, when inferred types are substituted for
+ // method type parameters in P, each parameter in P
+ // has the same type as the corresponding parameter
+ // in L.
+ //
+ } else {
+ //
+ // TODO: If L has an implicitly typed parameter
+ // list, when inferred types are substituted for
+ // method type parameters in P and the resulting
+ // parameter types are given to the parameters of L,
+ // the body of L is a valid expression or statement
+ // block.
+
+ Type [] types = new Type [p_delegate_parameter_count];
+
+ //bool failure = false;
+ for (int j = 0; j < p_delegate_parameter_count; j++){
+ Type p_pt = p_delegate_parameters.ParameterType (j);
+
+ if (!p_pt.IsGenericParameter){
+ types [j] = p_pt;
+ continue;
+ }
+
+ //bool found = false;
+ for (int k = 0; k < method_generic_args.Length; k++){
+ if (method_generic_args [k] == p_pt){
+ types [j] = inferred_types [k];
+ break;
+ }
+ }
+ //
+ // If we could not infer just yet, continue
+ //
+ if (types [j] == null)
+ goto do_continue;
+ }
+
+ //
+ // If it results in a valid expression or statement block
+ //
+ Type lambda_inferred_type = le.TryBuild (ec, types);
+
+ if (lambda_inferred_type != null){
+ //
+ // Success, set the proper inferred_type value to the new type.
+ // return true
+ //
+ for (int k = 0; k < method_generic_args.Length; k++){
+ if (method_generic_args [k] == p_return_type){
+ inferred_types [k] = lambda_inferred_type;
+
+ lambdas.RemoveAt (i);
+ return true;
+ }
+ }
+ }
+ }
+
+ useless_lambda:
+ lambdas.RemoveAt (i);
+
+ do_continue:
+ ;
+ }
+
+#if false
+ Console.WriteLine ("Inferred types");
+ foreach (Type it in inferred_types){
+ Console.WriteLine (" IT: {0}", it);
+ if (it == null)
+ return false;
+ }
+#endif
+
+ // No inference was made in any of the elements.
+ return false;
+ }
+
/// <summary>
/// Type inference. Try to infer the type arguments from `method',
/// which is invoked with the arguments `arguments'. This is used
/// when resolving an Invocation or a DelegateInvocation and the user
/// did not explicitly specify type arguments.
/// </summary>
- public static bool InferTypeArguments (ArrayList arguments,
+ public static bool InferTypeArguments (EmitContext ec,
+ ArrayList arguments,
ref MethodBase method)
{
if (!TypeManager.IsGenericMethod (method))
if (arg_count != pd.Count)
return false;
- Type[] method_args = method.GetGenericArguments ();
+ Type[] method_generic_args = method.GetGenericArguments ();
bool is_open = false;
- for (int i = 0; i < method_args.Length; i++) {
- if (method_args [i].IsGenericParameter) {
+
+ for (int i = 0; i < method_generic_args.Length; i++) {
+ if (method_generic_args [i].IsGenericParameter) {
is_open = true;
break;
}
if (!is_open)
return !TypeManager.IsGenericMethodDefinition (method);
- Type[] infered_types = new Type [method_args.Length];
+ Type[] inferred_types = new Type [method_generic_args.Length];
Type[] param_types = new Type [pd.Count];
Type[] arg_types = new Type [pd.Count];
-
+ ArrayList lambdas = null;
+
for (int i = 0; i < arg_count; i++) {
param_types [i] = pd.ParameterType (i);
Argument a = (Argument) arguments [i];
- if ((a.Expr is NullLiteral) || (a.Expr is MethodGroupExpr) ||
- (a.Expr is AnonymousMethod))
+ if (a.Expr is NullLiteral || a.Expr is MethodGroupExpr)
continue;
+
+ if (a.Expr is LambdaExpression){
+ if (lambdas == null)
+ lambdas = new ArrayList ();
+ lambdas.Add (i);
+ }
+ else if (a.Expr is AnonymousMethodExpression) {
+ if (RootContext.Version != LanguageVersion.LINQ)
+ continue;
+
+ Type dtype = param_types[i];
+ if (!TypeManager.IsDelegateType (dtype))
+ continue;
+
+ AnonymousMethodExpression am = (AnonymousMethodExpression)a.Expr;
+ Expression e = am.InferTypeArguments (ec, dtype);
+ if (e == null)
+ return false;
+
+ arg_types[i] = e.Type;
+ continue;
+ }
arg_types [i] = a.Type;
}
- if (!InferTypeArguments (param_types, arg_types, infered_types))
- return false;
+ if (!InferTypeArguments (param_types, arg_types, inferred_types)){
+ //Console.WriteLine ("InferTypeArgument found {0} lambdas ", lambdas);
+ if (lambdas == null)
+ return false;
+
+ //
+ // While the lambda expressions lead to a valid inference
+ //
+ int lambda_count;
+ do {
+ lambda_count = lambdas.Count;
+ if (!LambdaInfer (ec, method_generic_args, pd, arguments, inferred_types, lambdas))
+ return false;
+ } while (lambdas.Count != 0 && lambdas.Count != lambda_count);
+ }
+
+ method = ((MethodInfo)method).MakeGenericMethod (inferred_types);
+
+#if MS_COMPATIBLE
+ // MS implementation throws NotSupportedException for GetParameters
+ // on unbaked generic method
+ ParameterData p = TypeManager.GetParameterData (method);
+ p.InflateTypes (param_types, inferred_types);
+#endif
- method = ((MethodInfo)method).MakeGenericMethod (infered_types);
return true;
}
return false;
Type[] method_args = method.GetGenericArguments ();
- Type[] infered_types = new Type [method_args.Length];
+ Type[] inferred_types = new Type [method_args.Length];
Type[] param_types = new Type [pd.Count];
Type[] arg_types = new Type [pd.Count];
arg_types [i] = apd.ParameterType (i);
}
- if (!InferTypeArguments (param_types, arg_types, infered_types))
+ if (!InferTypeArguments (param_types, arg_types, inferred_types))
return false;
- method = ((MethodInfo)method).MakeGenericMethod (infered_types);
+ method = ((MethodInfo)method).MakeGenericMethod (inferred_types);
return true;
}
-
- public static bool IsNullableType (Type t)
- {
- return generic_nullable_type == DropGenericTypeArguments (t);
- }
-
- public static bool IsNullableTypeOf (Type t, Type nullable)
- {
- if (!IsNullableType (t))
- return false;
-
- return GetTypeArguments (t) [0] == nullable;
- }
-
- public static bool IsNullableValueType (Type t)
- {
- if (!IsNullableType (t))
- return false;
-
- return GetTypeArguments (t) [0].IsValueType;
- }
}
public abstract class Nullable
return this;
}
- if (unwrap != null) {
- expr = Convert.ImplicitConversion (ec, unwrap, rtype, loc);
- if (expr != null) {
- left = expr;
- expr = right;
- type = expr.Type;
- return this;
- }
+ Expression left_null = unwrap != null ? unwrap : left;
+ expr = Convert.ImplicitConversion (ec, left_null, rtype, loc);
+ if (expr != null) {
+ left = expr;
+ expr = right;
+ type = rtype;
+ return this;
}
Binary.Error_OperatorCannotBeApplied (loc, "??", ltype, rtype);
projects / mono.git / blobdiff