return null;
}
+ //
+ // C# 3.0 introduced contextual keywords (var) which behaves like a type if type with
+ // same name exists or as a keyword when no type was found
+ //
+ public virtual TypeExpr ResolveAsContextualType (IResolveContext rc, bool silent)
+ {
+ return ResolveAsTypeTerminal (rc, silent);
+ }
+
//
// This is used to resolve the expression as a type, a null
// value will be returned if the expression is not a type
if (te == null)
return null;
- if (!silent) {
+ if (!silent) { // && !(te is TypeParameterExpr)) {
ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (te.Type);
if (obsolete_attr != null && !ec.IsInObsoleteScope) {
AttributeTester.Report_ObsoleteMessage (obsolete_attr, te.GetSignatureForError (), Location);
public virtual void Error_ValueCannotBeConverted (EmitContext ec, Location loc, Type target, bool expl)
{
+ // The error was already reported as CS1660
+ if (type == TypeManager.anonymous_method_type)
+ return;
+
if (Type.FullName == target.FullName){
Report.ExtraInformation (loc,
String.Format (
if (expl) {
Report.Error (30, loc, "Cannot convert type `{0}' to `{1}'",
- GetSignatureForError (), TypeManager.CSharpName (target));
+ TypeManager.CSharpName (type), TypeManager.CSharpName (target));
return;
}
return;
}
- Report.Error (29, loc, "Cannot implicitly convert type {0} to `{1}'",
- Type == TypeManager.anonymous_method_type ?
- "anonymous method" : "`" + GetSignatureForError () + "'",
+ Report.Error (29, loc, "Cannot implicitly convert type `{0}' to `{1}'",
+ TypeManager.CSharpName (type),
TypeManager.CSharpName (target));
}
+ protected void Error_VariableIsUsedBeforeItIsDeclared (string name)
+ {
+ Report.Error (841, loc, "The variable `{0}' cannot be used before it is declared",
+ name);
+ }
+
+ protected virtual void Error_TypeDoesNotContainDefinition (Type type, string name)
+ {
+ Error_TypeDoesNotContainDefinition (loc, type, name);
+ }
+
public static void Error_TypeDoesNotContainDefinition (Location loc, Type type, string name)
{
+ Report.SymbolRelatedToPreviousError (type);
Report.Error (117, loc, "`{0}' does not contain a definition for `{1}'",
TypeManager.CSharpName (type), name);
}
return ResolveFlags.VariableOrValue;
default:
- throw new Exception ("Expression " + GetType () +
- " ExprClass is Invalid after resolve");
+ throw new InternalErrorException (loc.ToString () + " " + GetType () + " ExprClass is Invalid after resolve");
}
}
}
if (mi.Length > 1) {
bool is_interface = qualifier_type != null && qualifier_type.IsInterface;
- MemberInfo non_method = null;
ArrayList methods = new ArrayList (2);
+ ArrayList non_methods = null;
foreach (MemberInfo m in mi) {
if (m is MethodBase) {
continue;
}
- if (non_method == null) {
- non_method = m;
+ if (non_methods == null) {
+ non_methods = new ArrayList (2);
+ non_methods.Add (m);
continue;
}
- Report.SymbolRelatedToPreviousError (m);
- Report.SymbolRelatedToPreviousError (non_method);
- Report.Error (229, loc, "Ambiguity between `{0}' and `{1}'",
- TypeManager.GetFullNameSignature (m), TypeManager.GetFullNameSignature (non_method));
- return null;
+ foreach (MemberInfo n_m in non_methods) {
+ if (m.DeclaringType.IsInterface && TypeManager.ImplementsInterface (m.DeclaringType, n_m.DeclaringType))
+ continue;
+
+ Report.SymbolRelatedToPreviousError (m);
+ Report.Error (229, loc, "Ambiguity between `{0}' and `{1}'",
+ TypeManager.GetFullNameSignature (m), TypeManager.GetFullNameSignature (n_m));
+ return null;
+ }
}
if (methods.Count == 0)
- return null;
+ return ExprClassFromMemberInfo (container_type, (MemberInfo)non_methods [0], loc);
- if (non_method != null) {
+ if (non_methods != null) {
MethodBase method = (MethodBase) methods [0];
-
+ MemberInfo non_method = (MemberInfo) non_methods [0];
if (method.DeclaringType == non_method.DeclaringType) {
// Cannot happen with C# code, but is valid in IL
Report.SymbolRelatedToPreviousError (method);
}
}
- return new MethodGroupExpr (methods, loc);
+ return new MethodGroupExpr (methods, queried_type, loc);
}
if (mi [0] is MethodBase)
- return new MethodGroupExpr (mi, loc);
+ return new MethodGroupExpr (mi, queried_type, loc);
return ExprClassFromMemberInfo (container_type, mi [0], loc);
}
/// look for private members and display a useful debugging message if we
/// find it.
/// </summary>
- public static Expression MemberLookupFinal (EmitContext ec, Type qualifier_type,
- Type queried_type, string name, Location loc)
- {
- return MemberLookupFinal (ec, qualifier_type, queried_type, name,
- AllMemberTypes, AllBindingFlags, loc);
- }
-
- public static Expression MemberLookupFinal (EmitContext ec, Type qualifier_type,
+ protected Expression MemberLookupFinal (EmitContext ec, Type qualifier_type,
Type queried_type, string name,
MemberTypes mt, BindingFlags bf,
Location loc)
e = MemberLookup (ec.ContainerType, qualifier_type, queried_type, name, mt, bf, loc);
- if (e == null && errors == Report.Errors)
- // No errors were reported by MemberLookup, but there was an error.
- MemberLookupFailed (ec.ContainerType, qualifier_type, queried_type, name, null, true, loc);
+ if (e != null || errors != Report.Errors)
+ return e;
- return e;
+ // No errors were reported by MemberLookup, but there was an error.
+ return Error_MemberLookupFailed (ec.ContainerType, qualifier_type, queried_type,
+ name, null, mt, bf);
}
- public static void MemberLookupFailed (Type container_type, Type qualifier_type,
- Type queried_type, string name,
- string class_name, bool complain_if_none_found,
- Location loc)
+ protected virtual Expression Error_MemberLookupFailed (Type container_type, Type qualifier_type,
+ Type queried_type, string name, string class_name,
+ MemberTypes mt, BindingFlags bf)
{
if (almostMatchedMembers.Count != 0) {
for (int i = 0; i < almostMatchedMembers.Count; ++i) {
}
}
almostMatchedMembers.Clear ();
- return;
+ return null;
}
MemberInfo[] lookup = null;
class_name = "global::";
} else {
lookup = TypeManager.MemberLookup (queried_type, null, queried_type,
- AllMemberTypes, AllBindingFlags |
- BindingFlags.NonPublic, name, null);
+ mt, (bf & ~BindingFlags.Public) | BindingFlags.NonPublic,
+ name, null);
+
+ if (lookup != null) {
+ Report.SymbolRelatedToPreviousError (lookup [0]);
+ ErrorIsInaccesible (loc, TypeManager.GetFullNameSignature (lookup [0]));
+ return Error_MemberLookupFailed (lookup);
+ }
+
+ lookup = TypeManager.MemberLookup (queried_type, null, queried_type,
+ AllMemberTypes, AllBindingFlags | BindingFlags.NonPublic,
+ name, null);
}
if (lookup == null) {
- if (!complain_if_none_found)
- return;
-
- if (class_name != null)
- Report.Error (103, loc, "The name `{0}' does not exist in the context of `{1}'",
- name, class_name);
- else
- Error_TypeDoesNotContainDefinition (loc, queried_type, name);
- return;
+ if (class_name != null) {
+ Report.Error (103, loc, "The name `{0}' does not exist in the current context",
+ name);
+ } else {
+ Error_TypeDoesNotContainDefinition (queried_type, name);
+ }
+ return null;
}
if (TypeManager.MemberLookup (queried_type, null, queried_type,
"requires {1} type arguments",
TypeManager.CSharpName (t),
TypeManager.GetNumberOfTypeArguments (t).ToString ());
- return;
+ return null;
}
}
- MemberList ml = TypeManager.FindMembers (queried_type, MemberTypes.Constructor,
- BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly, null, null);
- if (name == ".ctor" && ml.Count == 0)
- {
- Report.Error (143, loc, "The type `{0}' has no constructors defined", TypeManager.CSharpName (queried_type));
- return;
+ return Error_MemberLookupFailed (lookup);
+ }
+
+ protected virtual Expression Error_MemberLookupFailed (MemberInfo[] members)
+ {
+ for (int i = 0; i < members.Length; ++i) {
+ if (!(members [i] is MethodBase))
+ return null;
}
- Report.SymbolRelatedToPreviousError (lookup [0]);
- ErrorIsInaccesible (loc, TypeManager.GetFullNameSignature (lookup [0]));
+ // By default propagate the closest candidates upwards
+ return new MethodGroupExpr (members, type, loc);
}
/// <summary>
static Expression GetOperatorTrueOrFalse (EmitContext ec, Expression e, bool is_true, Location loc)
{
- MethodBase method;
- Expression operator_group;
+ MethodGroupExpr operator_group;
#if GMCS_SOURCE
if (TypeManager.IsNullableType (e.Type))
return new Nullable.OperatorTrueOrFalse (e, is_true, loc).Resolve (ec);
#endif
- operator_group = MethodLookup (ec.ContainerType, e.Type, is_true ? "op_True" : "op_False", loc);
+ operator_group = MethodLookup (ec.ContainerType, e.Type, is_true ? "op_True" : "op_False", loc) as MethodGroupExpr;
if (operator_group == null)
return null;
- ArrayList arguments = new ArrayList ();
+ ArrayList arguments = new ArrayList (1);
arguments.Add (new Argument (e, Argument.AType.Expression));
- method = ((MethodGroupExpr) operator_group).OverloadResolve (
+ operator_group = operator_group.OverloadResolve (
ec, arguments, false, loc);
- if (method == null)
+ if (operator_group == null)
return null;
- return new StaticCallExpr ((MethodInfo) method, arguments, loc);
+ return new StaticCallExpr ((MethodInfo) operator_group, arguments, loc);
}
/// <summary>
/// would be "unsigned int".
///
/// </summary>
- public class EmptyCast : Expression {
+ public class EmptyCast : Expression
+ {
protected Expression child;
- public EmptyCast (Expression child, Type return_type)
+ protected EmptyCast (Expression child, Type return_type)
{
eclass = child.eclass;
loc = child.Location;
type = return_type;
this.child = child;
}
+
+ public static Expression Create (Expression child, Type type)
+ {
+ Constant c = child as Constant;
+ if (c != null)
+ return new EmptyConstantCast (c, type);
+
+ return new EmptyCast (child, type);
+ }
public override Expression DoResolve (EmitContext ec)
{
get { return child.IsNegative; }
}
+ public override bool IsZeroInteger {
+ get { return child.IsZeroInteger; }
+ }
+
public override void Emit (EmitContext ec)
{
child.Emit (ec);
public override Constant ConvertImplicitly (Type type)
{
- if (Type == type) {
+ Type this_type = TypeManager.DropGenericTypeArguments (Type);
+ type = TypeManager.DropGenericTypeArguments (type);
+
+ if (this_type == type) {
// This is workaround of mono bug. It can be removed when the latest corlib spreads enough
if (TypeManager.IsEnumType (type.UnderlyingSystemType))
return this;
- if (type.UnderlyingSystemType != Child.Type)
+ Type child_type = TypeManager.DropGenericTypeArguments (Child.Type);
+ if (type.UnderlyingSystemType != child_type)
Child = Child.ConvertImplicitly (type.UnderlyingSystemType);
return this;
}
/// of a dotted-name.
/// </summary>
public class SimpleName : Expression {
- public string Name;
+ public readonly string Name;
public readonly TypeArguments Arguments;
bool in_transit;
public static void Error_ObjectRefRequired (EmitContext ec, Location l, string name)
{
- if (ec.IsFieldInitializer)
+ if (ec.IsInFieldInitializer)
Report.Error (236, l,
"A field initializer cannot reference the nonstatic field, method, or property `{0}'",
name);
FullNamedExpression ResolveNested (IResolveContext ec, Type t)
{
- if (!TypeManager.IsGenericTypeDefinition (t))
+ if (!TypeManager.IsGenericTypeDefinition (t) && !TypeManager.IsGenericType (t))
return null;
DeclSpace ds = ec.DeclContainer;
if (silent || errors != Report.Errors)
return null;
+ Error_TypeOrNamespaceNotFound (ec);
+ return null;
+ }
+
+ protected virtual void Error_TypeOrNamespaceNotFound (IResolveContext ec)
+ {
MemberCore mc = ec.DeclContainer.GetDefinition (Name);
if (mc != null) {
Error_UnexpectedKind (ec.DeclContainer, "type", GetMemberType (mc), loc);
- return null;
+ return;
}
string ns = ec.DeclContainer.NamespaceEntry.NS.Name;
Type type = a.GetType (fullname);
if (type != null) {
Report.SymbolRelatedToPreviousError (type);
- Expression.ErrorIsInaccesible (loc, fullname);
- return null;
+ Expression.ErrorIsInaccesible (loc, TypeManager.CSharpName (type));
+ return;
}
}
Type t = ec.DeclContainer.LookupAnyGeneric (Name);
if (t != null) {
Namespace.Error_InvalidNumberOfTypeArguments (t, loc);
- return null;
+ return;
}
+ if (Arguments != null) {
+ FullNamedExpression retval = ec.DeclContainer.LookupNamespaceOrType (SimpleName.RemoveGenericArity (Name), loc, true);
+ if (retval != null) {
+ Namespace.Error_TypeArgumentsCannotBeUsed (retval.Type, loc, "type");
+ return;
+ }
+ }
+
NamespaceEntry.Error_NamespaceNotFound (loc, Name);
- return null;
}
// TODO: I am still not convinced about this. If someone else will need it
{
if (in_transit)
return null;
- in_transit = true;
+ in_transit = true;
Expression e = DoSimpleNameResolve (ec, right_side, intermediate);
+ in_transit = false;
+
if (e == null)
return null;
else
return pref.Resolve (ec);
}
+
+ Expression expr = current_block.Toplevel.GetTransparentIdentifier (Name);
+ if (expr != null) {
+ if (right_side != null)
+ return expr.ResolveLValue (ec, right_side, loc);
+ return expr.Resolve (ec);
+ }
}
//
// Stage 2: Lookup members
//
- DeclSpace lookup_ds = ec.DeclContainer;
Type almost_matched_type = null;
ArrayList almost_matched = null;
- do {
+ for (DeclSpace lookup_ds = ec.DeclContainer; lookup_ds != null; lookup_ds = lookup_ds.Parent) {
+ // either RootDeclSpace or GenericMethod
if (lookup_ds.TypeBuilder == null)
- break;
+ continue;
e = MemberLookup (ec.ContainerType, lookup_ds.TypeBuilder, Name, loc);
- if (e != null)
- break;
+ if (e != null) {
+ if (e is PropertyExpr) {
+ // since TypeManager.MemberLookup doesn't know if we're doing a lvalue access or not,
+ // it doesn't know which accessor to check permissions against
+ if (((PropertyExpr) e).IsAccessibleFrom (ec.ContainerType, right_side != null))
+ break;
+ } else if (e is EventExpr) {
+ if (((EventExpr) e).IsAccessibleFrom (ec.ContainerType))
+ break;
+ } else {
+ break;
+ }
+ e = null;
+ }
if (almost_matched == null && almostMatchedMembers.Count > 0) {
almost_matched_type = lookup_ds.TypeBuilder;
almost_matched = (ArrayList) almostMatchedMembers.Clone ();
}
-
- lookup_ds =lookup_ds.Parent;
- } while (lookup_ds != null);
-
- if (e == null && ec.ContainerType != null)
- e = MemberLookup (ec.ContainerType, ec.ContainerType, Name, loc);
+ }
if (e == null) {
if (almost_matched == null && almostMatchedMembers.Count > 0) {
}
if (e == null) {
+ if (current_block != null) {
+ IKnownVariable ikv = current_block.Explicit.GetKnownVariable (Name);
+ if (ikv != null) {
+ LocalInfo li = ikv as LocalInfo;
+ // Supress CS0219 warning
+ if (li != null)
+ li.Used = true;
+
+ Error_VariableIsUsedBeforeItIsDeclared (Name);
+ return null;
+ }
+ }
+
if (almost_matched != null)
almostMatchedMembers = almost_matched;
if (almost_matched_type == null)
almost_matched_type = ec.ContainerType;
- MemberLookupFailed (ec.ContainerType, null, almost_matched_type, ((SimpleName) this).Name, ec.DeclContainer.Name, true, loc);
+ Error_MemberLookupFailed (ec.ContainerType, null, almost_matched_type, Name,
+ ec.DeclContainer.Name, AllMemberTypes, AllBindingFlags);
return null;
}
Expression left;
if (me.IsInstance) {
- if (ec.IsStatic || ec.IsFieldInitializer) {
+ if (ec.IsStatic || ec.IsInFieldInitializer) {
//
// Note that an MemberExpr can be both IsInstance and IsStatic.
// An unresolved MethodGroupExpr can contain both kinds of methods
public override void Emit (EmitContext ec)
{
- //
- // If this is ever reached, then we failed to
- // find the name as a namespace
- //
-
- Error (103, "The name `" + Name +
- "' does not exist in the class `" +
- ec.DeclContainer.Name + "'");
+ throw new InternalErrorException ("The resolve phase was not executed");
}
public override string ToString ()
public override string GetSignatureForError ()
{
+ if (Arguments != null) {
+ return TypeManager.RemoveGenericArity (Name) + "<" +
+ Arguments.GetSignatureForError () + ">";
+ }
+
return Name;
}
return this;
}
- static readonly char [] dot_array = { '.' };
- protected override TypeExpr DoResolveAsTypeStep (IResolveContext ec)
+ private class UnexpectedType
{
- // If name is of the form `N.I', first lookup `N', then search a member `I' in it.
- string rest = null;
- string lookup_name = name;
- int pos = name.IndexOf ('.');
- if (pos >= 0) {
- rest = name.Substring (pos + 1);
- lookup_name = name.Substring (0, pos);
- }
-
- FullNamedExpression resolved = RootNamespace.Global.Lookup (ec.DeclContainer, lookup_name, Location.Null);
-
- if (resolved != null && rest != null) {
- // Now handle the rest of the the name.
- string [] elements = rest.Split (dot_array);
- string element;
- int count = elements.Length;
- int i = 0;
- while (i < count && resolved != null && resolved is Namespace) {
- Namespace ns = resolved as Namespace;
- element = elements [i++];
- lookup_name += "." + element;
- resolved = ns.Lookup (ec.DeclContainer, element, Location.Null);
- }
+ }
- if (resolved != null && resolved is TypeExpr) {
- Type t = ((TypeExpr) resolved).Type;
- while (t != null) {
- if (!ec.DeclContainer.CheckAccessLevel (t)) {
- resolved = null;
- lookup_name = t.FullName;
- break;
- }
- if (i == count) {
- type = t;
- return this;
- }
- t = TypeManager.GetNestedType (t, elements [i++]);
+ // This performes recursive type lookup, providing support for generic types.
+ // For example, given the type:
+ //
+ // System.Collections.Generic.KeyValuePair`2[[System.Int32],[System.String]]
+ //
+ // The types will be checked in the following order:
+ // _
+ // System |
+ // System.Collections |
+ // System.Collections.Generic |
+ // _ |
+ // System | recursive call 1 |
+ // System.Int32 _| | main method call
+ // _ |
+ // System | recursive call 2 |
+ // System.String _| |
+ // |
+ // System.Collections.Generic.KeyValuePair`2[[System.Int32],[System.String]] _|
+ //
+ private Type TypeLookup (IResolveContext ec, string name)
+ {
+ int index = 0;
+ int dot = 0;
+ bool done = false;
+ FullNamedExpression resolved = null;
+ Type type = null;
+ Type recursive_type = null;
+ while (index < name.Length) {
+ if (name[index] == '[') {
+ int open = index;
+ int braces = 1;
+ do {
+ index++;
+ if (name[index] == '[')
+ braces++;
+ else if (name[index] == ']')
+ braces--;
+ } while (braces > 0);
+ recursive_type = TypeLookup (ec, name.Substring (open + 1, index - open - 1));
+ if (recursive_type == null || (recursive_type == typeof(UnexpectedType)))
+ return recursive_type;
+ }
+ else {
+ if (name[index] == ',')
+ done = true;
+ else if ((name[index] == '.' && !done) || (index == name.Length && name[0] != '[')) {
+ string substring = name.Substring(dot, index - dot);
+
+ if (resolved == null)
+ resolved = RootNamespace.Global.Lookup (ec.DeclContainer, substring, Location.Null);
+ else if (resolved is Namespace)
+ resolved = (resolved as Namespace).Lookup (ec.DeclContainer, substring, Location.Null);
+ else if (type != null)
+ type = TypeManager.GetNestedType (type, substring);
+ else
+ return null;
+
+ if (resolved == null)
+ return null;
+ else if (type == null && resolved is TypeExpr)
+ type = resolved.Type;
+
+ dot = index + 1;
}
}
+ index++;
}
+ if (name[0] != '[') {
+ string substring = name.Substring(dot, index - dot);
- if (resolved == null) {
- NamespaceEntry.Error_NamespaceNotFound (loc, lookup_name);
- return null;
+ if (type != null)
+ return TypeManager.GetNestedType (type, substring);
+
+ if (resolved != null) {
+ resolved = (resolved as Namespace).Lookup (ec.DeclContainer, substring, Location.Null);
+ if (resolved is TypeExpr)
+ return resolved.Type;
+
+ if (resolved == null)
+ return null;
+
+ resolved.Error_UnexpectedKind (ec.DeclContainer, "type", loc);
+ return typeof (UnexpectedType);
+ }
+ else
+ return null;
+ }
+ else
+ return recursive_type;
}
- if (!(resolved is TypeExpr)) {
- resolved.Error_UnexpectedKind (ec.DeclContainer, "type", loc);
+ protected override TypeExpr DoResolveAsTypeStep (IResolveContext ec)
+ {
+ Type t = TypeLookup (ec, name);
+ if (t == null) {
+ NamespaceEntry.Error_NamespaceNotFound (loc, name);
return null;
}
-
- type = resolved.Type;
+ if (t == typeof(UnexpectedType))
+ return null;
+ type = t;
return this;
}
{
// CloneTo: Nothing, we do not keep any state on this expression
}
+
+ public override string GetSignatureForError ()
+ {
+ if (type == null)
+ return TypeManager.CSharpName (name);
+
+ return base.GetSignatureForError ();
+ }
}
/// <summary>
//
if (left is TypeExpr) {
+ left = left.ResolveAsTypeTerminal (ec, true);
+ if (left == null)
+ return null;
+
if (!IsStatic) {
SimpleName.Error_ObjectRefRequired (ec, loc, GetSignatureForError ());
return null;
///
public class ExtensionMethodGroupExpr : MethodGroupExpr
{
- NamespaceEntry namespaceEntry;
- readonly bool usingCandidates;
+ readonly NamespaceEntry namespaceEntry;
+ public Expression ExtensionExpression;
+ Argument extension_argument;
- public ExtensionMethodGroupExpr (ArrayList list, NamespaceEntry n, bool usingCandidates,
- Type extensionType, Location l)
- : base (list, l)
+ public ExtensionMethodGroupExpr (ArrayList list, NamespaceEntry n, Type extensionType, Location l)
+ : base (list, extensionType, l)
{
this.namespaceEntry = n;
- this.usingCandidates = usingCandidates;
- this.type = extensionType;
}
public override bool IsBase {
get { return namespaceEntry == null; }
}
- public override MethodBase OverloadExtensionResolve (EmitContext ec, ref ArrayList arguments, ref MethodGroupExpr mg,
- Expression expr, Location loc)
+ public override void EmitArguments (EmitContext ec, ArrayList arguments)
+ {
+ if (arguments == null)
+ arguments = new ArrayList (1);
+ arguments.Insert (0, extension_argument);
+ base.EmitArguments (ec, arguments);
+ }
+
+ public override void EmitCall (EmitContext ec, ArrayList arguments)
{
if (arguments == null)
arguments = new ArrayList (1);
-
- Argument a = new Argument (((MemberAccess)expr).Expr);
- a.Resolve (ec, loc);
- arguments.Insert (0, a);
+ arguments.Insert (0, extension_argument);
+ base.EmitCall (ec, arguments);
+ }
- mg = this;
- do {
- MethodBase method = mg.OverloadResolve (ec, arguments, true, loc);
- if (method != null)
- return method;
+ public override MethodGroupExpr OverloadResolve (EmitContext ec, ArrayList arguments, bool may_fail, Location loc)
+ {
+ if ((ExtensionExpression.eclass & (ExprClass.Value | ExprClass.Variable)) == 0)
+ return base.OverloadResolve (ec, arguments, may_fail, loc);
- ExtensionMethodGroupExpr e = namespaceEntry.LookupExtensionMethod (type, usingCandidates, Name);
- if (e == null)
- return mg.OverloadResolve (ec, arguments, false, loc);
+ if (arguments == null)
+ arguments = new ArrayList (1);
+
+ arguments.Insert (0, new Argument (ExtensionExpression));
+ MethodGroupExpr mg = ResolveOverloadExtensions (ec, arguments, namespaceEntry, loc);
+
+ // Store resolved argument and restore original arguments
+ if (mg != null)
+ ((ExtensionMethodGroupExpr)mg).extension_argument = (Argument)arguments [0];
+ arguments.RemoveAt (0);
- mg = e;
- namespaceEntry = e.namespaceEntry;
- } while (true);
+ return mg;
}
+
+ MethodGroupExpr ResolveOverloadExtensions (EmitContext ec, ArrayList arguments, NamespaceEntry ns, Location loc)
+ {
+ // Use normal resolve rules
+ MethodGroupExpr mg = base.OverloadResolve (ec, arguments, ns != null, loc);
+ if (mg != null)
+ return mg;
+
+ if (ns == null)
+ return null;
+
+ // Search continues
+ ExtensionMethodGroupExpr e = ns.LookupExtensionMethod (type, null, Name);
+ if (e == null)
+ return base.OverloadResolve (ec, arguments, false, loc);
+
+ e.ExtensionExpression = ExtensionExpression;
+ return e.ResolveOverloadExtensions (ec, arguments, e.namespaceEntry, loc);
+ }
}
/// <summary>
- /// MethodGroup Expression.
- ///
- /// This is a fully resolved expression that evaluates to a type
+ /// MethodGroupExpr represents a group of method candidates which
+ /// can be resolved to the best method overload
/// </summary>
- public class MethodGroupExpr : MemberExpr {
+ public class MethodGroupExpr : MemberExpr
+ {
+ public interface IErrorHandler
+ {
+ bool NoExactMatch (EmitContext ec, MethodBase method);
+ }
+
+ public static IErrorHandler CustomErrorHandler;
public MethodBase [] Methods;
- bool has_type_arguments = false;
- bool identical_type_name = false;
+ MethodBase best_candidate;
+ bool has_type_arguments;
+ bool identical_type_name;
bool is_base;
- public MethodGroupExpr (MemberInfo [] mi, Location l)
+ public MethodGroupExpr (MemberInfo [] mi, Type type, Location l)
+ : this (type, l)
{
Methods = new MethodBase [mi.Length];
mi.CopyTo (Methods, 0);
- eclass = ExprClass.MethodGroup;
-
- // Set the type to something that will never be useful, which will
- // trigger the proper conversions.
- type = typeof (MethodGroupExpr);
- loc = l;
}
- public MethodGroupExpr (ArrayList list, Location l)
+ public MethodGroupExpr (ArrayList list, Type type, Location l)
+ : this (type, l)
{
- Methods = new MethodBase [list.Count];
-
try {
- list.CopyTo (Methods, 0);
+ Methods = (MethodBase[])list.ToArray (typeof (MethodBase));
} catch {
foreach (MemberInfo m in list){
if (!(m is MethodBase)){
throw;
}
- loc = l;
+
+ }
+
+ protected MethodGroupExpr (Type type, Location loc)
+ {
+ this.loc = loc;
eclass = ExprClass.MethodGroup;
- type = TypeManager.object_type;
+ this.type = type;
}
public override Type DeclaringType {
get {
return has_type_arguments;
}
-
- set {
- has_type_arguments = value;
- }
}
public bool IdenticalTypeName {
public override string GetSignatureForError ()
{
+ if (best_candidate != null)
+ return TypeManager.CSharpSignature (best_candidate);
+
return TypeManager.CSharpSignature (Methods [0]);
}
return false;
}
}
+
+ public static explicit operator ConstructorInfo (MethodGroupExpr mg)
+ {
+ return (ConstructorInfo)mg.best_candidate;
+ }
+
+ public static explicit operator MethodInfo (MethodGroupExpr mg)
+ {
+ return (MethodInfo)mg.best_candidate;
+ }
/// <summary>
/// Determines "better conversion" as specified in 14.4.2.3
override public Expression DoResolve (EmitContext ec)
{
- if (!IsInstance)
- InstanceExpression = null;
-
if (InstanceExpression != null) {
InstanceExpression = InstanceExpression.DoResolve (ec);
if (InstanceExpression == null)
{
ReportUsageError ();
}
+
+ public virtual void EmitArguments (EmitContext ec, ArrayList arguments)
+ {
+ Invocation.EmitArguments (ec, best_candidate, arguments, false, null);
+ }
+
+ public virtual void EmitCall (EmitContext ec, ArrayList arguments)
+ {
+ Invocation.EmitCall (ec, IsBase, InstanceExpression, best_candidate, arguments, loc);
+ }
+
+ protected virtual void Error_InvalidArguments (EmitContext ec, Location loc, int idx, MethodBase method,
+ Type delegate_type, Argument a, ParameterData expected_par)
+ {
+ if (a is CollectionElementInitializer.ElementInitializerArgument) {
+ Report.SymbolRelatedToPreviousError (method);
+ if ((expected_par.ParameterModifier (idx) & Parameter.Modifier.ISBYREF) != 0) {
+ Report.Error (1954, loc, "The best overloaded collection initalizer method `{0}' cannot have 'ref', or `out' modifier",
+ TypeManager.CSharpSignature (method));
+ return;
+ }
+ Report.Error (1950, loc, "The best overloaded collection initalizer method `{0}' has some invalid arguments",
+ TypeManager.CSharpSignature (method));
+ } else if (delegate_type == null) {
+ Report.SymbolRelatedToPreviousError (method);
+ Report.Error (1502, loc, "The best overloaded method match for `{0}' has some invalid arguments",
+ TypeManager.CSharpSignature (method));
+ } else
+ Report.Error (1594, loc, "Delegate `{0}' has some invalid arguments",
+ TypeManager.CSharpName (delegate_type));
+
+ Parameter.Modifier mod = expected_par.ParameterModifier (idx);
+
+ string index = (idx + 1).ToString ();
+ if ((mod & Parameter.Modifier.ISBYREF) != (a.Modifier & Parameter.Modifier.ISBYREF) ||
+ (mod & Parameter.Modifier.ISBYREF) != 0) {
+ if ((mod & (Parameter.Modifier.REF | Parameter.Modifier.OUT)) == 0)
+ Report.Error (1615, loc, "Argument `{0}' should not be passed with the `{1}' keyword",
+ index, Parameter.GetModifierSignature (a.Modifier));
+ else
+ Report.Error (1620, loc, "Argument `{0}' must be passed with the `{1}' keyword",
+ index, Parameter.GetModifierSignature (mod));
+ } else {
+ string p1 = Argument.FullDesc (a);
+ string p2 = TypeManager.CSharpName (expected_par.ParameterType (idx));
+
+ if (p1 == p2) {
+ Report.ExtraInformation (loc, "(equally named types possibly from different assemblies in previous ");
+ Report.SymbolRelatedToPreviousError (a.Expr.Type);
+ Report.SymbolRelatedToPreviousError (expected_par.ParameterType (idx));
+ }
+ Report.Error (1503, loc, "Argument {0}: Cannot convert type `{1}' to `{2}'", index, p1, p2);
+ }
+ }
+
+ protected virtual int GetApplicableParametersCount (MethodBase method, ParameterData parameters)
+ {
+ return parameters.Count;
+ }
public static bool IsAncestralType (Type first_type, Type second_type)
{
return first_type != second_type &&
(TypeManager.IsSubclassOf (second_type, first_type) ||
TypeManager.ImplementsInterface (second_type, first_type));
- }
+ }
+
+ ///
+ /// Determines if the candidate method is applicable (section 14.4.2.1)
+ /// to the given set of arguments
+ /// A return value rates candidate method compatibility,
+ /// 0 = the best, int.MaxValue = the worst
+ ///
+ public int IsApplicable (EmitContext ec,
+ ArrayList arguments, int arg_count, ref MethodBase method)
+ {
+ MethodBase candidate = method;
+
+ ParameterData pd = TypeManager.GetParameterData (candidate);
+ int param_count = GetApplicableParametersCount (candidate, pd);
+
+ if (arg_count != param_count)
+ return int.MaxValue;
+
+ //
+ // 1. Infer type arguments for generic method
+ //
+#if GMCS_SOURCE
+ if (!HasTypeArguments && TypeManager.IsGenericMethod (method)) {
+ int score = TypeManager.InferTypeArguments (ec, arguments, ref candidate);
+ if (score != 0)
+ return --score;
+
+ if (TypeManager.IsGenericMethodDefinition (candidate))
+ throw new InternalErrorException ("a generic method definition took part in overload resolution");
+
+ pd = TypeManager.GetParameterData (candidate);
+ }
+#endif
+
+ //
+ // 2. Each argument has to be implicitly converible to method parameter
+ //
+ for (int i = arg_count; i > 0; ) {
+ i--;
+
+ Argument a = (Argument) arguments [i];
+
+ Parameter.Modifier a_mod = a.Modifier &
+ ~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK);
+
+ Parameter.Modifier p_mod = pd.ParameterModifier (i) &
+ ~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK | Parameter.Modifier.PARAMS);
+
+ Type pt = pd.ParameterType (i);
+
+ // FIXME: Kill this abomination (EmitContext.TempEc)
+ EmitContext prevec = EmitContext.TempEc;
+ EmitContext.TempEc = ec;
+ try {
+ if (pt.IsByRef)
+ pt = pt.GetElementType ();
+
+ if (!Convert.ImplicitConversionExists (ec, a.Expr, pt))
+ return ++i * 2;
+
+ if (a_mod != p_mod)
+ return ++i * 2 - 1;
+
+ } finally {
+ EmitContext.TempEc = prevec;
+ }
+ }
+
+ method = candidate;
+ return 0;
+ }
public static bool IsOverride (MethodBase cand_method, MethodBase base_method)
{
return true;
}
+
+ public bool IsParamsMethodApplicable (EmitContext ec,
+ ArrayList arguments, int arg_count,
+ ref MethodBase candidate)
+ {
+ return IsParamsMethodApplicable (
+ ec, arguments, arg_count, false, ref candidate) ||
+ IsParamsMethodApplicable (
+ ec, arguments, arg_count, true, ref candidate);
+
+
+ }
+
+ bool IsParamsMethodApplicable (EmitContext ec,
+ ArrayList arguments, int arg_count,
+ bool do_varargs, ref MethodBase candidate)
+ {
+#if GMCS_SOURCE
+ if (!HasTypeArguments &&
+ !TypeManager.InferParamsTypeArguments (ec, arguments, ref candidate))
+ return false;
+
+ if (TypeManager.IsGenericMethodDefinition (candidate))
+ throw new InternalErrorException ("a generic method definition took part in overload resolution");
+#endif
+
+ return IsParamsMethodApplicable (
+ ec, arguments, arg_count, candidate, do_varargs);
+ }
+
+ /// <summary>
+ /// Determines if the candidate method, if a params method, is applicable
+ /// in its expanded form to the given set of arguments
+ /// </summary>
+ bool IsParamsMethodApplicable (EmitContext ec, ArrayList arguments,
+ int arg_count, MethodBase candidate,
+ bool do_varargs)
+ {
+ ParameterData pd = TypeManager.GetParameterData (candidate);
+ int pd_count = GetApplicableParametersCount (candidate, pd);
+ if (pd_count == 0)
+ return false;
+
+ int count = pd_count - 1;
+ if (do_varargs) {
+ if (pd.ParameterModifier (count) != Parameter.Modifier.ARGLIST)
+ return false;
+ if (pd_count != arg_count)
+ return false;
+
+ if (!(((Argument) arguments [count]).Expr is Arglist))
+ return false;
+ --pd_count;
+ } else {
+ if (!pd.HasParams)
+ return false;
+ }
+
+ if (count > arg_count)
+ return false;
+
+ if (pd_count == 1 && arg_count == 0)
+ return true;
+
+ //
+ // If we have come this far, the case which
+ // remains is when the number of parameters is
+ // less than or equal to the argument count.
+ //
+ int argument_index = 0;
+ Argument a;
+ for (int i = 0; i < pd_count; ++i) {
+
+ if ((pd.ParameterModifier (i) & Parameter.Modifier.PARAMS) != 0) {
+ Type element_type = TypeManager.GetElementType (pd.ParameterType (i));
+ int params_args_count = arg_count - pd_count;
+ if (params_args_count < 0)
+ continue;
+
+ do {
+ a = (Argument) arguments [argument_index++];
+
+ if (!Convert.ImplicitConversionExists (ec, a.Expr, element_type))
+ return false;
+ } while (params_args_count-- > 0);
+ continue;
+ }
+
+ a = (Argument) arguments [argument_index++];
+
+ Parameter.Modifier a_mod = a.Modifier &
+ (unchecked (~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK)));
+ Parameter.Modifier p_mod = pd.ParameterModifier (i) &
+ (unchecked (~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK)));
+
+ if (a_mod == p_mod) {
+
+ if (a_mod == Parameter.Modifier.NONE)
+ if (!Convert.ImplicitConversionExists (ec,
+ a.Expr,
+ pd.ParameterType (i)))
+ return false;
+
+ if ((a_mod & Parameter.Modifier.ISBYREF) != 0) {
+ Type pt = pd.ParameterType (i);
+
+ if (!pt.IsByRef)
+ pt = TypeManager.GetReferenceType (pt);
+
+ if (pt != a.Type)
+ return false;
+ }
+ } else
+ return false;
+
+ }
+
+ return true;
+ }
+
+ public static MethodGroupExpr MakeUnionSet (Expression mg1, Expression mg2, Location loc)
+ {
+ MemberInfo [] miset;
+ MethodGroupExpr union;
+
+ if (mg1 == null) {
+ if (mg2 == null)
+ return null;
+ return (MethodGroupExpr) mg2;
+ } else {
+ if (mg2 == null)
+ return (MethodGroupExpr) mg1;
+ }
+
+ MethodGroupExpr left_set = null, right_set = null;
+ int length1 = 0, length2 = 0;
+
+ left_set = (MethodGroupExpr) mg1;
+ length1 = left_set.Methods.Length;
+
+ right_set = (MethodGroupExpr) mg2;
+ length2 = right_set.Methods.Length;
+
+ ArrayList common = new ArrayList ();
+
+ foreach (MethodBase r in right_set.Methods){
+ if (TypeManager.ArrayContainsMethod (left_set.Methods, r))
+ common.Add (r);
+ }
+
+ miset = new MemberInfo [length1 + length2 - common.Count];
+ left_set.Methods.CopyTo (miset, 0);
+
+ int k = length1;
+
+ foreach (MethodBase r in right_set.Methods) {
+ if (!common.Contains (r))
+ miset [k++] = r;
+ }
+
+ union = new MethodGroupExpr (miset, mg1.Type, loc);
+
+ return union;
+ }
static Type MoreSpecific (Type p, Type q)
{
return null;
}
- public virtual MethodBase OverloadExtensionResolve (EmitContext ec, ref ArrayList arguments, ref MethodGroupExpr mg,
- Expression expr, Location loc)
- {
- MethodBase method = OverloadResolve (ec, arguments, true, loc);
- if (method != null) {
- mg = this;
- return method;
- }
-
- MemberAccess mexpr = expr as MemberAccess;
- if (mexpr != null) {
- ExtensionMethodGroupExpr emg = ec.DeclContainer.LookupExtensionMethod (mexpr.Expr.Type, Name);
- if (emg != null) {
- return OverloadExtensionResolve (ec, ref arguments, ref mg, expr, loc);
- }
- }
-
- return OverloadResolve (ec, arguments, false, loc);
- }
-
/// <summary>
/// Find the Applicable Function Members (7.4.2.1)
///
/// that is the best match of me on Arguments.
///
/// </summary>
- public virtual MethodBase OverloadResolve (EmitContext ec, ArrayList Arguments,
+ public virtual MethodGroupExpr OverloadResolve (EmitContext ec, ArrayList Arguments,
bool may_fail, Location loc)
{
- MethodBase method = null;
bool method_params = false;
Type applicable_type = null;
int arg_count = 0;
nmethods = j;
}
- int applicable_errors = Report.Errors;
-
+ //
+ // Enable message recording, it's used mainly by lambda expressions
+ //
+ Report.IMessageRecorder msg_recorder = new Report.MessageRecorder ();
+ Report.IMessageRecorder prev_recorder = Report.SetMessageRecorder (msg_recorder);
+
//
// First we construct the set of applicable methods
//
bool is_sorted = true;
+ int best_candidate_rate = int.MaxValue;
for (int i = 0; i < nmethods; i++) {
Type decl_type = Methods [i].DeclaringType;
// Check if candidate is applicable (section 14.4.2.1)
// Is candidate applicable in normal form?
//
- bool is_applicable = Invocation.IsApplicable (ec, this, Arguments, arg_count, ref Methods [i]);
+ int candidate_rate = IsApplicable (ec, Arguments, arg_count, ref Methods [i]);
- if (!is_applicable && Invocation.IsParamsMethodApplicable (ec, this, Arguments, arg_count, ref Methods [i])) {
+ if (candidate_rate != 0 && IsParamsMethodApplicable (ec, Arguments, arg_count, ref Methods [i])) {
MethodBase candidate = Methods [i];
if (candidate_to_form == null)
candidate_to_form = new PtrHashtable ();
candidate_to_form [candidate] = candidate;
// Candidate is applicable in expanded form
- is_applicable = true;
+ candidate_rate = 0;
+ }
+
+ if (candidate_rate < best_candidate_rate) {
+ best_candidate_rate = candidate_rate;
+ best_candidate = Methods [i];
}
- if (!is_applicable)
+ if (candidate_rate != 0) {
+ if (msg_recorder != null)
+ msg_recorder.EndSession ();
continue;
+ }
+
+ msg_recorder = null;
candidates.Add (Methods [i]);
}
}
- if (applicable_errors != Report.Errors)
+ Report.SetMessageRecorder (prev_recorder);
+ if (msg_recorder != null && msg_recorder.PrintMessages ())
return null;
int candidate_top = candidates.Count;
if (applicable_type == null) {
+ if (ec.IsInProbingMode || may_fail)
+ return null;
+
//
- // Okay so we have failed to find anything so we
- // return by providing info about the closest match
+ // Okay so we have failed to find exact match so we
+ // return error info about the closest match
//
- int errors = Report.Errors;
- for (int i = 0; i < nmethods; ++i) {
- MethodBase c = Methods [i];
- ParameterData pd = TypeManager.GetParameterData (c);
-
- if (pd.Count != arg_count)
- continue;
-
-#if GMCS_SOURCE
- if (!TypeManager.InferTypeArguments (Arguments, ref c))
- continue;
- if (TypeManager.IsGenericMethodDefinition (c))
- continue;
-#endif
-
- Invocation.VerifyArgumentsCompat (ec, Arguments, arg_count,
- c, false, null, may_fail, loc);
-
- if (!may_fail && errors == Report.Errors)
- throw new InternalErrorException (
- "VerifyArgumentsCompat and IsApplicable do not agree; " +
- "likely reason: ImplicitConversion and ImplicitConversionExists have gone out of sync");
+ if (best_candidate != null) {
+ if (CustomErrorHandler != null) {
+ if (CustomErrorHandler.NoExactMatch (ec, best_candidate))
+ return null;
+ }
+
+ if (TypeManager.IsGenericMethod (best_candidate)) {
+ Report.Error (411, loc,
+ "The type arguments for method `{0}' cannot be inferred from " +
+ "the usage. Try specifying the type arguments explicitly",
+ TypeManager.CSharpSignature (best_candidate));
+ } else {
+ VerifyArgumentsCompat (ec, Arguments, arg_count, best_candidate, false, null, may_fail, loc);
+ }
- break;
+ return null;
}
- if (!may_fail && errors == Report.Errors) {
+ if (almostMatchedMembers.Count != 0) {
+ Error_MemberLookupFailed (ec.ContainerType, type, type, ".ctor",
+ null, MemberTypes.Constructor, AllBindingFlags);
+ return null;
+ }
+
+ //
+ // We failed to find any match
+ //
+ if (Name == ConstructorInfo.ConstructorName) {
+ Report.SymbolRelatedToPreviousError (type);
+ Report.Error (1729, loc,
+ "The type `{0}' does not contain a constructor that takes `{1}' arguments",
+ TypeManager.CSharpName (type), arg_count);
+ } else {
string report_name = Name;
- if (report_name == ".ctor")
+ if (report_name == ConstructorInfo.ConstructorName)
report_name = TypeManager.CSharpName (DeclaringType);
-
-#if GMCS_SOURCE
- //
- // Type inference
- //
- for (int i = 0; i < Methods.Length; ++i) {
- MethodBase c = Methods [i];
- ParameterData pd = TypeManager.GetParameterData (c);
-
- if (pd.Count != arg_count)
- continue;
-
- if (TypeManager.InferTypeArguments (Arguments, ref c))
- continue;
-
- Report.Error (
- 411, loc, "The type arguments for " +
- "method `{0}' cannot be inferred from " +
- "the usage. Try specifying the type " +
- "arguments explicitly.", report_name);
- return null;
- }
-#endif
Invocation.Error_WrongNumArguments (loc, report_name, arg_count);
}
// Now we actually find the best method
//
- method = (MethodBase) candidates [0];
- method_params = candidate_to_form != null && candidate_to_form.Contains (method);
+ best_candidate = (MethodBase) candidates [0];
+ method_params = candidate_to_form != null && candidate_to_form.Contains (best_candidate);
for (int ix = 1; ix < candidate_top; ix++) {
MethodBase candidate = (MethodBase) candidates [ix];
- if (candidate == method)
+ if (candidate == best_candidate)
continue;
bool cand_params = candidate_to_form != null && candidate_to_form.Contains (candidate);
if (BetterFunction (ec, Arguments, arg_count,
candidate, cand_params,
- method, method_params)) {
- method = candidate;
+ best_candidate, method_params)) {
+ best_candidate = candidate;
method_params = cand_params;
}
}
for (int ix = 0; ix < candidate_top; ix++) {
MethodBase candidate = (MethodBase) candidates [ix];
- if (candidate == method)
+ if (candidate == best_candidate)
continue;
bool cand_params = candidate_to_form != null && candidate_to_form.Contains (candidate);
if (!BetterFunction (ec, Arguments, arg_count,
- method, method_params,
+ best_candidate, method_params,
candidate, cand_params))
{
if (!may_fail)
}
if (ambiguous != null) {
- Report.SymbolRelatedToPreviousError (method);
+ Report.SymbolRelatedToPreviousError (best_candidate);
Report.Error (121, loc, "The call is ambiguous between the following methods or properties: `{0}' and `{1}'",
- TypeManager.CSharpSignature (ambiguous), TypeManager.CSharpSignature (method));
- return method;
+ TypeManager.CSharpSignature (ambiguous), TypeManager.CSharpSignature (best_candidate));
+ return this;
}
//
// If the method is a virtual function, pick an override closer to the LHS type.
//
- if (!IsBase && method.IsVirtual) {
- if (TypeManager.IsOverride (method))
+ if (!IsBase && best_candidate.IsVirtual) {
+ if (TypeManager.IsOverride (best_candidate))
throw new InternalErrorException (
- "Should not happen. An 'override' method took part in overload resolution: " + method);
+ "Should not happen. An 'override' method took part in overload resolution: " + best_candidate);
if (candidate_overrides != null)
foreach (MethodBase candidate in candidate_overrides) {
- if (IsOverride (candidate, method))
- method = candidate;
+ if (IsOverride (candidate, best_candidate))
+ best_candidate = candidate;
}
}
+ // We can stop here when probing is on
+ if (ec.IsInProbingMode)
+ return this;
+
//
// And now check if the arguments are all
// compatible, perform conversions if
// necessary etc. and return if everything is
// all right
//
- if (!Invocation.VerifyArgumentsCompat (ec, Arguments, arg_count, method,
+ if (!VerifyArgumentsCompat (ec, Arguments, arg_count, best_candidate,
method_params, null, may_fail, loc))
return null;
- if (method == null)
+ if (best_candidate == null)
return null;
- MethodBase the_method = TypeManager.DropGenericMethodArguments (method);
+ MethodBase the_method = TypeManager.DropGenericMethodArguments (best_candidate);
#if GMCS_SOURCE
if (the_method.IsGenericMethodDefinition &&
- !ConstraintChecker.CheckConstraints (ec, the_method, method, loc))
+ !ConstraintChecker.CheckConstraints (ec, the_method, best_candidate, loc))
return null;
#endif
if (data != null)
data.SetMemberIsUsed ();
- return method;
- }
-
-
- bool RemoveMethods (bool keep_static)
- {
- ArrayList smethods = new ArrayList ();
-
- foreach (MethodBase mb in Methods){
- if (mb.IsStatic == keep_static)
- smethods.Add (mb);
- }
-
- if (smethods.Count == 0)
- return false;
-
- Methods = new MethodBase [smethods.Count];
- smethods.CopyTo (Methods, 0);
-
- return true;
+ return this;
}
- /// <summary>
- /// Removes any instance methods from the MethodGroup, returns
- /// false if the resulting set is empty.
- /// </summary>
- public bool RemoveInstanceMethods ()
- {
- return RemoveMethods (true);
- }
-
- /// <summary>
- /// Removes any static methods from the MethodGroup, returns
- /// false if the resulting set is empty.
- /// </summary>
- public bool RemoveStaticMethods ()
- {
- return RemoveMethods (false);
- }
-
public Expression ResolveGeneric (EmitContext ec, TypeArguments args)
{
#if GMCS_SOURCE
- if (args.Resolve (ec) == false)
+ if (!args.Resolve (ec))
return null;
Type[] atypes = args.Arguments;
ArrayList list = new ArrayList ();
foreach (MethodBase mb in Methods) {
MethodInfo mi = mb as MethodInfo;
- if ((mi == null) || !mi.IsGenericMethod)
+ if ((mi == null) || !mb.IsGenericMethod)
continue;
- Type[] gen_params = mi.GetGenericArguments ();
+ Type[] gen_params = mb.GetGenericArguments ();
if (first == null) {
first = mi;
if (gen_params.Length != atypes.Length)
continue;
- list.Add (mi.MakeGenericMethod (atypes));
+ mi = mi.MakeGenericMethod (atypes);
+ list.Add (mi);
+
+#if MS_COMPATIBLE
+ // MS implementation throws NotSupportedException for GetParameters
+ // on unbaked generic method
+ Parameters p = TypeManager.GetParameterData (mi) as Parameters;
+ if (p != null) {
+ p = p.Clone ();
+ p.InflateTypes (gen_params, atypes);
+ TypeManager.RegisterMethod (mi, p);
+ }
+#endif
}
if (list.Count > 0) {
- MethodGroupExpr new_mg = new MethodGroupExpr (list, Location);
- new_mg.InstanceExpression = InstanceExpression;
- new_mg.HasTypeArguments = true;
- new_mg.IsBase = IsBase;
- return new_mg;
+ this.Methods = (MethodBase []) list.ToArray (typeof (MethodBase));
+ has_type_arguments = true;
+ return this;
}
- if (first != null)
+ if (first != null) {
+ Report.SymbolRelatedToPreviousError (first);
Report.Error (
- 305, loc, "Using the generic method `{0}' " +
- "requires {1} type arguments", Name,
- first_count.ToString ());
- else
+ 305, loc, "Using the generic method `{0}' requires `{1}' type arguments",
+ TypeManager.CSharpSignature (first), first_count.ToString ());
+ } else
Report.Error (
308, loc, "The non-generic method `{0}' " +
"cannot be used with type arguments", Name);
throw new NotImplementedException ();
#endif
}
+
+ public bool VerifyArgumentsCompat (EmitContext ec, ArrayList Arguments,
+ int arg_count, MethodBase method,
+ bool chose_params_expanded,
+ Type delegate_type, bool may_fail, Location loc)
+ {
+ ParameterData pd = TypeManager.GetParameterData (method);
+ int param_count = GetApplicableParametersCount (method, pd);
+
+ int j;
+ int a_idx = 0;
+ Argument a = null;
+ int errors = Report.Errors;
+ for (j = 0; j < param_count; j++) {
+ Type parameter_type = pd.ParameterType (j);
+ Parameter.Modifier pm = pd.ParameterModifier (j);
+
+ if (pm == Parameter.Modifier.ARGLIST) {
+ a = (Argument) Arguments [a_idx];
+ if (!(a.Expr is Arglist))
+ break;
+ ++a_idx;
+ continue;
+ }
+
+ int params_arg_count = 1;
+ if (pm == Parameter.Modifier.PARAMS) {
+ pm = Parameter.Modifier.NONE;
+ params_arg_count = arg_count - param_count + 1;
+ if (chose_params_expanded)
+ parameter_type = TypeManager.GetElementType (parameter_type);
+ }
+
+ while (params_arg_count > 0) {
+ a = (Argument) Arguments [a_idx];
+ if (pm != a.Modifier)
+ break;
+
+ if (!TypeManager.IsEqual (a.Type, parameter_type)) {
+ if (pm == Parameter.Modifier.OUT || pm == Parameter.Modifier.REF)
+ break;
+
+ Expression conv = Convert.ImplicitConversion (ec, a.Expr, parameter_type, loc);
+ if (conv == null)
+ break;
+
+ // Update the argument with the implicit conversion
+ if (a.Expr != conv)
+ a.Expr = conv;
+ }
+
+ --params_arg_count;
+ ++a_idx;
+ }
+ if (params_arg_count > 0)
+ break;
+
+ if (parameter_type.IsPointer && !ec.InUnsafe) {
+ if (!may_fail)
+ UnsafeError (loc);
+ return false;
+ }
+ }
+
+ if (a_idx == arg_count)
+ return true;
+
+ if (!may_fail && Report.Errors == errors)
+ Error_InvalidArguments (ec, loc, a_idx, method, delegate_type, a, pd);
+ return false;
+ }
}
/// <summary>
if (t.IsPointer && !ec.InUnsafe) {
UnsafeError (loc);
- return null;
}
return base.ResolveMemberAccess (ec, left, loc, original);
InstanceExpression.CheckMarshalByRefAccess ();
}
- if (!in_initializer && !ec.IsFieldInitializer) {
+ if (!in_initializer && !ec.IsInFieldInitializer) {
ObsoleteAttribute oa;
FieldBase f = TypeManager.GetField (FieldInfo);
if (f != null) {
}
}
}
-
+
+ IFixedBuffer fb = AttributeTester.GetFixedBuffer (FieldInfo);
+ if (fb != null) {
+ if (!ec.InFixedInitializer && ec.ContainerType.IsValueType) {
+ Report.Error (1666, loc, "You cannot use fixed size buffers contained in unfixed expressions. Try using the fixed statement");
+ }
+
+ if (!(InstanceExpression is LocalVariableReference) &&
+ !(InstanceExpression is This)) {
+ Report.SymbolRelatedToPreviousError (FieldInfo);
+ Report.Error (1708, loc, "`{0}': Fixed size buffers can only be accessed through locals or fields",
+ TypeManager.GetFullNameSignature (FieldInfo));
+ }
+
+ return new FixedBufferPtr (this, fb.ElementType, loc).Resolve (ec);
+ }
+
// If the instance expression is a local variable or parameter.
IVariable var = InstanceExpression as IVariable;
if ((var == null) || (var.VariableInfo == null))
if (FieldInfo.IsInitOnly) {
// InitOnly fields can only be assigned in constructors or initializers
- if (!ec.IsFieldInitializer && !ec.IsConstructor)
+ if (!ec.IsInFieldInitializer && !ec.IsConstructor)
return Report_AssignToReadonly (right_side);
if (ec.IsConstructor) {
if (!prepared)
EmitInstance (ec, false);
- if (is_volatile)
- ig.Emit (OpCodes.Volatile);
-
IFixedBuffer ff = AttributeTester.GetFixedBuffer (FieldInfo);
- if (ff != null)
- {
+ if (ff != null) {
ig.Emit (OpCodes.Ldflda, FieldInfo);
ig.Emit (OpCodes.Ldflda, ff.Element);
- }
- else {
+ } else {
+ if (is_volatile)
+ ig.Emit (OpCodes.Volatile);
+
ig.Emit (OpCodes.Ldfld, FieldInfo);
}
}
bool is_static = (fa & FieldAttributes.Static) != 0;
bool is_readonly = (fa & FieldAttributes.InitOnly) != 0;
ILGenerator ig = ec.ig;
- prepared = prepare_for_load;
if (is_readonly && !ec.IsConstructor){
Report_AssignToReadonly (source);
return;
}
- EmitInstance (ec, prepare_for_load);
+ //
+ // String concatenation creates a new string instance
+ //
+ prepared = prepare_for_load && !(source is StringConcat);
+ EmitInstance (ec, prepared);
- source.Emit (ec);
+ source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
if (!FieldInfo.IsStatic) {
FieldBase f = TypeManager.GetField (FieldInfo);
if (f != null){
if ((f.ModFlags & Modifiers.VOLATILE) != 0){
- Report.Warning (420, 1, loc, "`{0}': A volatile fields cannot be passed using a ref or out parameter",
+ Report.Warning (420, 1, loc, "`{0}': A volatile field references will not be treated as volatile",
f.GetSignatureForError ());
- return;
}
if ((mode & AddressOp.Store) != 0)
Report.Error (1546, loc, "Property `{0}' is not supported by the C# language. Try to call the accessor method `{1}' directly",
Name, sig.ToString ());
}
-
+
+ public bool IsAccessibleFrom (Type invocation_type, bool lvalue)
+ {
+ bool dummy;
+ MethodInfo accessor = lvalue ? setter : getter;
+ if (accessor == null && lvalue)
+ accessor = getter;
+ return accessor != null && IsAccessorAccessible (invocation_type, accessor, out dummy);
+ }
+
override public Expression DoResolve (EmitContext ec)
{
if (resolved)
override public Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
if (right_side == EmptyExpression.OutAccess) {
- Report.Error (206, loc, "A property or indexer `{0}' may not be passed as an out or ref parameter",
+ if (ec.CurrentBlock.Toplevel.GetTransparentIdentifier (PropertyInfo.Name) != null) {
+ Report.Error (1939, loc, "A range variable `{0}' may not be passes as `ref' or `out' parameter",
+ PropertyInfo.Name);
+ } else {
+ Report.Error (206, loc, "A property or indexer `{0}' may not be passed as `ref' or `out' parameter",
GetSignatureForError ());
+ }
return null;
}
}
}
- Invocation.EmitCall (ec, IsBase, IsStatic, InstanceExpression, getter, null, loc, prepared, false);
+ Invocation.EmitCall (ec, IsBase, InstanceExpression, getter, null, loc, prepared, false);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
{
Expression my_source = source;
- prepared = prepare_for_load;
-
- if (prepared) {
+ if (prepare_for_load) {
+ if (source is StringConcat)
+ EmitInstance (ec, false);
+ else
+ prepared = true;
+
source.Emit (ec);
+
+ prepared = true;
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
if (!is_static) {
}
} else if (leave_copy) {
source.Emit (ec);
- if (!is_static) {
- temp = new LocalTemporary (this.Type);
- temp.Store (ec);
- }
+ temp = new LocalTemporary (this.Type);
+ temp.Store (ec);
my_source = temp;
}
-
+
ArrayList args = new ArrayList (1);
args.Add (new Argument (my_source, Argument.AType.Expression));
- Invocation.EmitCall (ec, IsBase, IsStatic, InstanceExpression, setter, args, loc, false, prepared);
+ Invocation.EmitCall (ec, IsBase, InstanceExpression, setter, args, loc, false, prepared);
if (temp != null) {
temp.Emit (ec);
/// </summary>
public class EventExpr : MemberExpr {
public readonly EventInfo EventInfo;
+ public bool IsBase;
bool is_static;
MethodInfo add_accessor, remove_accessor;
if (InstanceExpression == null)
return false;
+ if (IsBase && add_accessor.IsAbstract) {
+ Error_CannotCallAbstractBase(TypeManager.CSharpSignature(add_accessor));
+ return false;
+ }
+
//
// This is using the same mechanism as the CS1540 check in PropertyExpr.
// However, in the Event case, we reported a CS0122 instead.
return true;
}
+ public bool IsAccessibleFrom (Type invocation_type)
+ {
+ bool dummy;
+ return IsAccessorAccessible (invocation_type, add_accessor, out dummy) &&
+ IsAccessorAccessible (invocation_type, remove_accessor, out dummy);
+ }
+
public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
return DoResolve (ec);
if (source_del.IsAddition)
Invocation.EmitCall (
- ec, false, IsStatic, InstanceExpression, add_accessor, args, loc);
+ ec, IsBase, InstanceExpression, add_accessor, args, loc);
else
Invocation.EmitCall (
- ec, false, IsStatic, InstanceExpression, remove_accessor, args, loc);
+ ec, IsBase, InstanceExpression, remove_accessor, args, loc);
}
}
EmitLoadAddress (ec);
}
}
-
+
+ ///
+ /// Handles `var' contextual keyword; var becomes a keyword only
+ /// if no type called var exists in a variable scope
+ ///
+ public class VarExpr : SimpleName
+ {
+ // Used for error reporting only
+ ArrayList initializer;
+
+ public VarExpr (string name, Location loc)
+ : base (name, loc)
+ {
+ }
+
+ public ArrayList VariableInitializer {
+ set {
+ this.initializer = value;
+ }
+ }
+
+ public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
+ {
+ if (type != null)
+ throw new InternalErrorException ("An implicitly typed local variable could not be redefined");
+
+ type = right_side.Type;
+ if (type == TypeManager.null_type || type == TypeManager.void_type || type == TypeManager.anonymous_method_type) {
+ Report.Error (815, loc, "An implicitly typed local variable declaration cannot be initialized with `{0}'",
+ right_side.GetSignatureForError ());
+ return null;
+ }
+
+ eclass = ExprClass.Variable;
+ return this;
+ }
+
+ protected override void Error_TypeOrNamespaceNotFound (IResolveContext ec)
+ {
+ if (ec is FieldBase) {
+ Report.Error (825, loc, "The contextual keyword `var' may only appear within a local variable declaration");
+ return;
+ }
+
+ base.Error_TypeOrNamespaceNotFound (ec);
+ }
+
+ public override TypeExpr ResolveAsContextualType (IResolveContext rc, bool silent)
+ {
+ TypeExpr te = base.ResolveAsContextualType (rc, true);
+ if (te != null)
+ return te;
+
+ if (initializer == null)
+ return null;
+
+ // TODO: refactor, the error is reported too many times
+ if (initializer.Count > 1) {
+ Location loc = ((Mono.CSharp.CSharpParser.VariableDeclaration)initializer [1]).Location;
+ Report.Error (819, loc, "An implicitly typed local variable declaration cannot include multiple declarators");
+ return null;
+ }
+
+ Expression variable_initializer = ((Mono.CSharp.CSharpParser.VariableDeclaration)initializer [0]).expression_or_array_initializer;
+ if (variable_initializer == null) {
+ Report.Error (818, loc, "An implicitly typed local variable declarator must include an initializer");
+ return null;
+ }
+
+ return null;
+ }
+ }
}
projects / mono.git / blobdiff