lr.local_info.Used = true;
}
+ ParameterReference pr = Expr as ParameterReference;
+ if ((pr != null) && pr.Parameter.IsCaptured) {
+ AnonymousMethod.Error_AddressOfCapturedVar (pr.Name, loc);
+ return null;
+ }
+
// According to the specs, a variable is considered definitely assigned if you take
// its address.
if ((variable != null) && (variable.VariableInfo != null)){
if (Expr == null)
return null;
- if (TypeManager.IsNullableType (Expr.Type))
+ if (TypeManager.IsNullableValueType (Expr.Type))
return new Nullable.LiftedUnaryOperator (Oper, Expr, loc).Resolve (ec);
eclass = ExprClass.Value;
Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temporary = new LocalTemporary (ec, expr.Type);
+ temporary = new LocalTemporary (expr.Type);
temporary.Store (ec);
}
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temporary = new LocalTemporary (ec, expr.Type);
+ temporary = new LocalTemporary (expr.Type);
temporary.Store (ec);
}
StoreFromPtr (ec.ig, type);
- if (temporary != null)
+ if (temporary != null) {
temporary.Emit (ec);
+ temporary.Release (ec);
+ }
}
public void AddressOf (EmitContext ec, AddressOp Mode)
#region IVariable Members
public VariableInfo VariableInfo {
- get {
- return null;
- }
+ get { return null; }
}
public bool VerifyFixed ()
PostIncrement = IsPost,
PostDecrement = IsPost | IsDecrement
}
-
+
Mode mode;
bool is_expr = false;
bool recurse = false;
-
+
Expression expr;
//
// This is expensive for the simplest case.
//
StaticCallExpr method;
-
+
public UnaryMutator (Mode m, Expression e, Location l)
{
mode = m;
return (mode == Mode.PreIncrement || mode == Mode.PostIncrement) ?
"++" : "--";
}
-
+
/// <summary>
/// Returns whether an object of type `t' can be incremented
/// or decremented with add/sub (ie, basically whether we can
if (expr == null)
return null;
} else {
- expr.Error_UnexpectedKind (ec, "variable, indexer or property access", loc);
+ expr.Error_UnexpectedKind (ec.DeclContainer, "variable, indexer or property access", loc);
return null;
}
eclass = ExprClass.Value;
- if (TypeManager.IsNullableType (expr.Type))
+ if (TypeManager.IsNullableValueType (expr.Type))
return new Nullable.LiftedUnaryMutator (mode, expr, loc).Resolve (ec);
return ResolveOperator (ec);
}
}
-
+
void EmitCode (EmitContext ec, bool is_expr)
{
recurse = true;
// having to allocate another expression
//
if (recurse) {
- ((IAssignMethod) expr).Emit (ec, is_expr && (mode == Mode.PostIncrement || mode == Mode.PostDecrement));
+ ((IAssignMethod) expr).Emit (ec, is_expr && (mode == Mode.PostIncrement || mode == Mode.PostDecrement));
if (method == null)
LoadOneAndEmitOp (ec, expr.Type);
else
recurse = false;
return;
}
-
+
EmitCode (ec, true);
}
-
+
public override void EmitStatement (EmitContext ec)
{
EmitCode (ec, false);
probe_type_expr = ProbeType.ResolveAsTypeTerminal (ec, false);
if (probe_type_expr == null)
return null;
- if (probe_type_expr.ResolveType (ec) == null)
- return null;
expr = expr.Resolve (ec);
if (expr == null)
action = Action.AlwaysFalse;
else
action = Action.Probe;
+ } else if (etype.ContainsGenericParameters || probe_type.ContainsGenericParameters) {
+ expr = new BoxedCast (expr, etype);
+ action = Action.Probe;
} else {
action = Action.AlwaysFalse;
warning_never_matches = true;
return this;
}
+ if (etype.ContainsGenericParameters || type.ContainsGenericParameters) {
+ expr = new BoxedCast (expr, etype);
+ do_isinst = true;
+ return this;
+ }
+
Error_CannotConvertType (etype, type, loc);
return null;
- }
+ }
+
+ public override bool GetAttributableValue (Type valueType, out object value)
+ {
+ return expr.GetAttributableValue (valueType, out value);
+ }
}
/// <summary>
this.target_type = cast_type;
this.expr = expr;
this.loc = loc;
+
+ if (target_type == TypeManager.system_void_expr)
+ Error_VoidInvalidInTheContext (loc);
}
public Expression TargetType {
- get {
- return target_type;
- }
+ get { return target_type; }
}
public Expression Expr {
- get {
- return expr;
- }
- set {
- expr = value;
- }
- }
-
- public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
- {
- expr = expr.DoResolveLValue (ec, right_side);
- if (expr == null)
- return null;
-
- return ResolveRest (ec);
+ get { return expr; }
+ set { expr = value; }
}
public override Expression DoResolve (EmitContext ec)
if (expr == null)
return null;
- return ResolveRest (ec);
- }
-
- Expression ResolveRest (EmitContext ec)
- {
TypeExpr target = target_type.ResolveAsTypeTerminal (ec, false);
if (target == null)
return null;
- type = target.ResolveType (ec);
+ type = target.Type;
if (type.IsAbstract && type.IsSealed) {
Report.Error (716, loc, "Cannot convert to static type `{0}'", TypeManager.CSharpName (type));
Constant c = expr as Constant;
if (c != null) {
- c = c.TryReduce (ec, type, loc);
- if (c != null)
- return c;
+ try {
+ c = c.TryReduce (ec, type, loc);
+ if (c != null)
+ return c;
+ }
+ catch (OverflowException) {
+ return null;
+ }
}
if (type.IsPointer && !ec.InUnsafe) {
public override void Emit (EmitContext ec)
{
- //
- // This one will never happen
- //
throw new Exception ("Should not happen");
}
}
+ "'");
}
- bool IsOfType (EmitContext ec, Type l, Type r, Type t, bool check_user_conversions)
+ bool IsConvertible (EmitContext ec, Expression le, Expression re, Type t)
{
- if ((l == t) || (r == t))
- return true;
-
- if (!check_user_conversions)
- return false;
+ return Convert.ImplicitConversionExists (ec, le, t) && Convert.ImplicitConversionExists (ec, re, t);
+ }
- if (Convert.ImplicitUserConversionExists (ec, l, t))
- return true;
- else if (Convert.ImplicitUserConversionExists (ec, r, t))
- return true;
- else
+ bool VerifyApplicable_Predefined (EmitContext ec, Type t)
+ {
+ if (!IsConvertible (ec, left, right, t))
return false;
+ left = ForceConversion (ec, left, t);
+ right = ForceConversion (ec, right, t);
+ type = t;
+ return true;
}
- //
- // Note that handling the case l == Decimal || r == Decimal
- // is taken care of by the Step 1 Operator Overload resolution.
- //
- // If `check_user_conv' is true, we also check whether a user-defined conversion
- // exists. Note that we only need to do this if both arguments are of a user-defined
- // type, otherwise ConvertImplict() already finds the user-defined conversion for us,
- // so we don't explicitly check for performance reasons.
- //
- bool DoNumericPromotions (EmitContext ec, Type l, Type r, Expression lexpr, Expression rexpr, bool check_user_conv)
- {
- if (IsOfType (ec, l, r, TypeManager.double_type, check_user_conv)){
- //
- // If either operand is of type double, the other operand is
- // conveted to type double.
- //
- if (r != TypeManager.double_type)
- right = Convert.ImplicitConversion (ec, right, TypeManager.double_type, loc);
- if (l != TypeManager.double_type)
- left = Convert.ImplicitConversion (ec, left, TypeManager.double_type, loc);
-
- type = TypeManager.double_type;
- } else if (IsOfType (ec, l, r, TypeManager.float_type, check_user_conv)){
- //
- // if either operand is of type float, the other operand is
- // converted to type float.
- //
- if (r != TypeManager.double_type)
- right = Convert.ImplicitConversion (ec, right, TypeManager.float_type, loc);
- if (l != TypeManager.double_type)
- left = Convert.ImplicitConversion (ec, left, TypeManager.float_type, loc);
- type = TypeManager.float_type;
- } else if (IsOfType (ec, l, r, TypeManager.uint64_type, check_user_conv)){
- Expression e;
- Type other;
- //
- // If either operand is of type ulong, the other operand is
- // converted to type ulong. or an error ocurrs if the other
- // operand is of type sbyte, short, int or long
- //
- if (l == TypeManager.uint64_type){
- if (r != TypeManager.uint64_type){
- if (right is IntConstant){
- IntConstant ic = (IntConstant) right;
-
- e = Convert.TryImplicitIntConversion (l, ic);
- if (e != null)
- right = e;
- } else if (right is LongConstant){
- long ll = ((LongConstant) right).Value;
-
- if (ll >= 0)
- right = new ULongConstant ((ulong) ll, right.Location);
- } else {
- e = Convert.ImplicitNumericConversion (ec, right, l);
- if (e != null)
- right = e;
- }
- }
- other = right.Type;
- } else {
- if (left is IntConstant){
- e = Convert.TryImplicitIntConversion (r, (IntConstant) left);
- if (e != null)
- left = e;
- } else if (left is LongConstant){
- long ll = ((LongConstant) left).Value;
-
- if (ll > 0)
- left = new ULongConstant ((ulong) ll, right.Location);
- } else {
- e = Convert.ImplicitNumericConversion (ec, left, r);
- if (e != null)
- left = e;
- }
- other = left.Type;
- }
-
- if ((other == TypeManager.sbyte_type) ||
- (other == TypeManager.short_type) ||
- (other == TypeManager.int32_type) ||
- (other == TypeManager.int64_type))
- Error_OperatorAmbiguous (loc, oper, l, r);
- else {
- left = ForceConversion (ec, left, TypeManager.uint64_type);
- right = ForceConversion (ec, right, TypeManager.uint64_type);
- }
- type = TypeManager.uint64_type;
- } else if (IsOfType (ec, l, r, TypeManager.int64_type, check_user_conv)){
- //
- // If either operand is of type long, the other operand is converted
- // to type long.
- //
- if (l != TypeManager.int64_type)
- left = Convert.ImplicitConversion (ec, left, TypeManager.int64_type, loc);
- if (r != TypeManager.int64_type)
- right = Convert.ImplicitConversion (ec, right, TypeManager.int64_type, loc);
-
- type = TypeManager.int64_type;
- } else if (IsOfType (ec, l, r, TypeManager.uint32_type, check_user_conv)){
- //
- // If either operand is of type uint, and the other
- // operand is of type sbyte, short or int, othe operands are
- // converted to type long (unless we have an int constant).
- //
- Type other = null;
-
- if (l == TypeManager.uint32_type){
- if (right is IntConstant){
- IntConstant ic = (IntConstant) right;
- int val = ic.Value;
-
- if (val >= 0){
- right = new UIntConstant ((uint) val, ic.Location);
- type = l;
-
- return true;
- }
- }
- other = r;
- } else if (r == TypeManager.uint32_type){
- if (left is IntConstant){
- IntConstant ic = (IntConstant) left;
- int val = ic.Value;
-
- if (val >= 0){
- left = new UIntConstant ((uint) val, ic.Location);
- type = r;
- return true;
- }
- }
-
- other = l;
- }
-
- if ((other == TypeManager.sbyte_type) ||
- (other == TypeManager.short_type) ||
- (other == TypeManager.int32_type)){
- left = ForceConversion (ec, left, TypeManager.int64_type);
- right = ForceConversion (ec, right, TypeManager.int64_type);
- type = TypeManager.int64_type;
- } else {
- //
- // if either operand is of type uint, the other
- // operand is converd to type uint
- //
- left = ForceConversion (ec, left, TypeManager.uint32_type);
- right = ForceConversion (ec, right, TypeManager.uint32_type);
- type = TypeManager.uint32_type;
- }
- } else if (l == TypeManager.decimal_type || r == TypeManager.decimal_type){
- if (l != TypeManager.decimal_type)
- left = Convert.ImplicitConversion (ec, left, TypeManager.decimal_type, loc);
+ bool IsApplicable_String (EmitContext ec, Expression le, Expression re, Operator oper)
+ {
+ bool l = Convert.ImplicitConversionExists (ec, le, TypeManager.string_type);
+ bool r = Convert.ImplicitConversionExists (ec, re, TypeManager.string_type);
- if (r != TypeManager.decimal_type)
- right = Convert.ImplicitConversion (ec, right, TypeManager.decimal_type, loc);
- type = TypeManager.decimal_type;
- } else {
- left = ForceConversion (ec, left, TypeManager.int32_type);
- right = ForceConversion (ec, right, TypeManager.int32_type);
+ if (oper == Operator.Equality || oper == Operator.Inequality)
+ return l && r;
+ if (oper == Operator.Addition)
+ return l || r;
+ return false;
+ }
- bool strConv =
- Convert.ImplicitConversionExists (ec, lexpr, TypeManager.string_type) &&
- Convert.ImplicitConversionExists (ec, rexpr, TypeManager.string_type);
- if (strConv && left != null && right != null)
- Error_OperatorAmbiguous (loc, oper, l, r);
+ bool OverloadResolve_PredefinedString (EmitContext ec, Operator oper)
+ {
+ if (!IsApplicable_String (ec, left, right, oper))
+ return false;
+ Type t = TypeManager.string_type;
+ if (Convert.ImplicitConversionExists (ec, left, t))
+ left = ForceConversion (ec, left, t);
+ if (Convert.ImplicitConversionExists (ec, right, t))
+ right = ForceConversion (ec, right, t);
+ type = t;
+ return true;
+ }
- type = TypeManager.int32_type;
- }
+ bool OverloadResolve_PredefinedIntegral (EmitContext ec)
+ {
+ return VerifyApplicable_Predefined (ec, TypeManager.int32_type) ||
+ VerifyApplicable_Predefined (ec, TypeManager.uint32_type) ||
+ VerifyApplicable_Predefined (ec, TypeManager.int64_type) ||
+ VerifyApplicable_Predefined (ec, TypeManager.uint64_type) ||
+ false;
+ }
- return (left != null) && (right != null);
+ bool OverloadResolve_PredefinedFloating (EmitContext ec)
+ {
+ return VerifyApplicable_Predefined (ec, TypeManager.float_type) ||
+ VerifyApplicable_Predefined (ec, TypeManager.double_type) ||
+ false;
}
static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
void Error_OperatorCannotBeApplied ()
{
- Error_OperatorCannotBeApplied (Location, OperName (oper), left.GetSignatureForError (), right.GetSignatureForError ());
+ Error_OperatorCannotBeApplied (Location, OperName (oper), TypeManager.CSharpName (left.Type),
+ TypeManager.CSharpName(right.Type));
}
static bool is_unsigned (Type t)
t == TypeManager.short_type || t == TypeManager.byte_type);
}
- static bool is_user_defined (Type t)
- {
- if (t.IsSubclassOf (TypeManager.value_type) &&
- (!TypeManager.IsBuiltinType (t) || t == TypeManager.decimal_type))
- return true;
- else
- return false;
- }
-
Expression Make32or64 (EmitContext ec, Expression e)
{
Type t= e.Type;
Expression CheckShiftArguments (EmitContext ec)
{
- Expression e;
-
- e = ForceConversion (ec, right, TypeManager.int32_type);
- if (e == null){
+ Expression new_left = Make32or64 (ec, left);
+ Expression new_right = ForceConversion (ec, right, TypeManager.int32_type);
+ if (new_left == null || new_right == null) {
Error_OperatorCannotBeApplied ();
return null;
}
- right = e;
-
- if (((e = Convert.ImplicitConversion (ec, left, TypeManager.int32_type, loc)) != null) ||
- ((e = Convert.ImplicitConversion (ec, left, TypeManager.uint32_type, loc)) != null) ||
- ((e = Convert.ImplicitConversion (ec, left, TypeManager.int64_type, loc)) != null) ||
- ((e = Convert.ImplicitConversion (ec, left, TypeManager.uint64_type, loc)) != null)){
- left = e;
- type = e.Type;
-
- if (type == TypeManager.int32_type || type == TypeManager.uint32_type){
- right = new Binary (Binary.Operator.BitwiseAnd, right, new IntConstant (31, loc));
- right = right.DoResolve (ec);
- } else {
- right = new Binary (Binary.Operator.BitwiseAnd, right, new IntConstant (63, loc));
- right = right.DoResolve (ec);
- }
-
- return this;
- }
- Error_OperatorCannotBeApplied ();
- return null;
+ type = new_left.Type;
+ int shiftmask = (type == TypeManager.int32_type || type == TypeManager.uint32_type) ? 31 : 63;
+ left = new_left;
+ right = new Binary (Binary.Operator.BitwiseAnd, new_right, new IntConstant (shiftmask, loc)).DoResolve (ec);
+ return this;
}
//
if ((l == TypeManager.null_type && EqualsNullIsReferenceEquals (r)) ||
(r == TypeManager.null_type && EqualsNullIsReferenceEquals (l))) {
Type = TypeManager.bool_type;
-
return this;
}
// built-in types
//
Expression left_operators = null, right_operators = null;
- if (!(TypeManager.IsPrimitiveType (l) && TypeManager.IsPrimitiveType (r))){
+ if (!(TypeManager.IsPrimitiveType (l) && TypeManager.IsPrimitiveType (r))) {
//
// Step 1: Perform Operator Overload location
//
string op = oper_names [(int) oper];
-
+
MethodGroupExpr union;
left_operators = MemberLookup (ec.ContainerType, l, op, MemberTypes.Method, AllBindingFlags, loc);
if (r != l){
union = Invocation.MakeUnionSet (left_operators, right_operators, loc);
} else
union = (MethodGroupExpr) left_operators;
-
+
if (union != null) {
ArrayList args = new ArrayList (2);
args.Add (new Argument (left, Argument.AType.Expression));
args.Add (new Argument (right, Argument.AType.Expression));
-
- MethodBase method = Invocation.OverloadResolve (
- ec, union, args, true, Location.Null);
+
+ MethodBase method = Invocation.OverloadResolve (ec, union, args, true, Location.Null);
if (method != null) {
MethodInfo mi = (MethodInfo) method;
-
return new BinaryMethod (mi.ReturnType, method, args);
}
}
}
-
+
//
// Step 0: String concatenation (because overloading will get this wrong)
//
Error_OperatorCannotBeApplied ();
return null;
}
-
+
// try to fold it in on the left
if (left is StringConcat) {
return left;
}
}
-
+
// Otherwise, start a new concat expression
return new StringConcat (ec, loc, left, right).Resolve (ec);
}
Error_OperatorCannotBeApplied ();
return null;
}
-
+
type = TypeManager.bool_type;
return this;
}
// Also, a standard conversion must exist from either one
//
bool left_to_right =
- Convert.ImplicitStandardConversionExists (ec, left, r);
+ Convert.ImplicitStandardConversionExists (left, r);
bool right_to_left = !left_to_right &&
- Convert.ImplicitStandardConversionExists (ec, right, l);
+ Convert.ImplicitStandardConversionExists (right, l);
if (!left_to_right && !right_to_left) {
Error_OperatorCannotBeApplied ();
if (r != TypeManager.object_type)
right = new EmptyCast (right, TypeManager.object_type);
- //
- // FIXME: CSC here catches errors cs254 and cs252
- //
return this;
}
-
- //
- // One of them is a valuetype, but the other one is not.
- //
- if (!l.IsValueType || !r.IsValueType) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
}
// Only perform numeric promotions on:
r = right.Type;
}
}
-
- if (TypeManager.IsDelegateType (r)){
+
+ if (TypeManager.IsDelegateType (r) || right is NullLiteral){
MethodInfo method;
ArrayList args = new ArrayList (2);
else
method = TypeManager.delegate_remove_delegate_delegate;
- if (!TypeManager.IsEqual (l, r)) {
+ if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral)) {
Error_OperatorCannotBeApplied ();
return null;
}
return e.Resolve (ec);
}
+ Expression orig_left = left;
+ Expression orig_right = right;
+
//
// operator & (bool x, bool y)
// operator | (bool x, bool y)
// operator ^ (bool x, bool y)
//
- if (l == TypeManager.bool_type && r == TypeManager.bool_type){
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr){
- type = l;
- return this;
+ if (oper == Operator.BitwiseAnd ||
+ oper == Operator.BitwiseOr ||
+ oper == Operator.ExclusiveOr) {
+ if (OverloadResolve_PredefinedIntegral (ec)) {
+ if (IsConvertible (ec, orig_left, orig_right, TypeManager.bool_type)) {
+ Error_OperatorAmbiguous (loc, oper, l, r);
+ return null;
+ }
+ } else if (!VerifyApplicable_Predefined (ec, TypeManager.bool_type)) {
+ Error_OperatorCannotBeApplied ();
+ return null;
}
+ return this;
}
//
return this;
}
}
-
- //
- // This will leave left or right set to null if there is an error
- //
- bool check_user_conv = is_user_defined (l) && is_user_defined (r);
- DoNumericPromotions (ec, l, r, left, right, check_user_conv);
- if (left == null || right == null){
- Error_OperatorCannotBeApplied (loc, OperName (oper), l, r);
- return null;
- }
- //
- // reload our cached types if required
- //
- l = left.Type;
- r = right.Type;
-
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr){
- if (l == r){
- if (((l == TypeManager.int32_type) ||
- (l == TypeManager.uint32_type) ||
- (l == TypeManager.short_type) ||
- (l == TypeManager.ushort_type) ||
- (l == TypeManager.int64_type) ||
- (l == TypeManager.uint64_type))){
- type = l;
- } else {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- } else {
- Error_OperatorCannotBeApplied ();
+ if (OverloadResolve_PredefinedIntegral (ec)) {
+ if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
+ Error_OperatorAmbiguous (loc, oper, l, r);
+ return null;
+ }
+ } else if (OverloadResolve_PredefinedFloating (ec)) {
+ if (IsConvertible (ec, orig_left, orig_right, TypeManager.decimal_type) ||
+ IsApplicable_String (ec, orig_left, orig_right, oper)) {
+ Error_OperatorAmbiguous (loc, oper, l, r);
return null;
}
+ } else if (VerifyApplicable_Predefined (ec, TypeManager.decimal_type)) {
+ if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
+ Error_OperatorAmbiguous (loc, oper, l, r);
+ return null;
+ }
+ } else if (!OverloadResolve_PredefinedString (ec, oper)) {
+ Error_OperatorCannotBeApplied ();
+ return null;
}
if (oper == Operator.Equality ||
oper == Operator.LessThanOrEqual ||
oper == Operator.LessThan ||
oper == Operator.GreaterThanOrEqual ||
- oper == Operator.GreaterThan){
+ oper == Operator.GreaterThan)
type = TypeManager.bool_type;
+
+ l = left.Type;
+ r = right.Type;
+
+ if (l == TypeManager.decimal_type || l == TypeManager.string_type || r == TypeManager.string_type) {
+ Type lookup = l;
+ if (r == TypeManager.string_type)
+ lookup = r;
+ MethodGroupExpr ops = (MethodGroupExpr) MemberLookup (
+ ec.ContainerType, lookup, oper_names [(int) oper],
+ MemberTypes.Method, AllBindingFlags, loc);
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (left, Argument.AType.Expression));
+ args.Add (new Argument (right, Argument.AType.Expression));
+ MethodBase method = Invocation.OverloadResolve (ec, ops, args, true, Location.Null);
+ return new BinaryMethod (type, method, args);
}
return this;
}
- Constant EnumLiftUp (EmitContext ec, Constant left, Constant right)
+ Constant EnumLiftUp (Constant left, Constant right)
{
switch (oper) {
case Operator.BitwiseOr:
// The conversion rules are ignored in enum context but why
if (!ec.InEnumContext && lc != null && rc != null && (TypeManager.IsEnumType (left.Type) || TypeManager.IsEnumType (right.Type))) {
- left = lc = EnumLiftUp (ec, lc, rc);
+ left = lc = EnumLiftUp (lc, rc);
if (lc == null)
return null;
- right = rc = EnumLiftUp (ec, rc, lc);
+ right = rc = EnumLiftUp (rc, lc);
if (rc == null)
return null;
}
return e;
}
- if (TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type))
+ Type ltype = left.Type, rtype = right.Type;
+ if ((left is NullLiteral || ltype.IsValueType) &&
+ (right is NullLiteral || rtype.IsValueType) &&
+ !(left is NullLiteral && right is NullLiteral) &&
+ (TypeManager.IsNullableType (ltype) || TypeManager.IsNullableType (rtype)))
return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
// Comparison warnings
return ResolveOperator (ec);
}
+ public override TypeExpr ResolveAsTypeTerminal (IResolveContext ec, bool silent)
+ {
+ return null;
+ }
+
private void CheckUselessComparison (Constant c, Type type)
{
if (c == null || !IsTypeIntegral (type)
//
// Constant folding
//
- if (operand is StringConstant && operands.Count != 0) {
- StringConstant last_operand = operands [operands.Count - 1] as StringConstant;
- if (last_operand != null) {
- operands [operands.Count - 1] = new StringConstant (last_operand.Value + ((StringConstant) operand).Value, last_operand.Location);
- return;
+ StringConstant sc = operand as StringConstant;
+ if (sc != null) {
+// TODO: it will be better to do this silently as an optimalization
+// int i = 0;
+// string s = "" + i;
+// because this code has poor performace
+// if (sc.Value.Length == 0)
+// Report.Warning (-300, 3, Location, "Appending an empty string has no effect. Did you intend to append a space string?");
+
+ if (operands.Count != 0) {
+ StringConstant last_operand = operands [operands.Count - 1] as StringConstant;
+ if (last_operand != null) {
+ operands [operands.Count - 1] = new StringConstant (last_operand.Value + ((StringConstant) operand).Value, last_operand.Location);
+ return;
+ }
}
}
return null;
}
- left_temp = new LocalTemporary (ec, type);
+ left_temp = new LocalTemporary (type);
ArrayList arguments = new ArrayList ();
arguments.Add (new Argument (left_temp, Argument.AType.Expression));
ig.MarkLabel (false_target);
op.Emit (ec);
ig.MarkLabel (end_target);
+
+ // We release 'left_temp' here since 'op' may refer to it too
+ left_temp.Release (ec);
}
}
if (expr == null)
return null;
- if (TypeManager.IsNullableType (expr.Type))
+ if (TypeManager.IsNullableValueType (expr.Type))
return new Nullable.LiftedConditional (expr, trueExpr, falseExpr, loc).Resolve (ec);
if (expr.Type != TypeManager.bool_type){
return this;
}
+ public override TypeExpr ResolveAsTypeTerminal (IResolveContext ec, bool silent)
+ {
+ return null;
+ }
+
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
}
- /// <summary>
- /// Local variables
- /// </summary>
- public class LocalVariableReference : Expression, IAssignMethod, IMemoryLocation, IVariable {
- public readonly string Name;
- public readonly Block Block;
- public LocalInfo local_info;
- bool is_readonly;
+ public abstract class VariableReference : Expression, IAssignMethod, IMemoryLocation {
bool prepared;
LocalTemporary temp;
-
- public LocalVariableReference (Block block, string name, Location l)
- {
- Block = block;
- Name = name;
- loc = l;
- eclass = ExprClass.Variable;
- }
- //
- // Setting `is_readonly' to false will allow you to create a writable
- // reference to a read-only variable. This is used by foreach and using.
- //
- public LocalVariableReference (Block block, string name, Location l,
- LocalInfo local_info, bool is_readonly)
- : this (block, name, l)
- {
- this.local_info = local_info;
- this.is_readonly = is_readonly;
+ public abstract Variable Variable {
+ get;
}
- public VariableInfo VariableInfo {
- get {
- return local_info.VariableInfo;
- }
+ public abstract bool IsRef {
+ get;
}
- public bool IsReadOnly {
- get {
- return is_readonly;
- }
+ public override void Emit (EmitContext ec)
+ {
+ Emit (ec, false);
}
- public bool VerifyAssigned (EmitContext ec)
+ //
+ // This method is used by parameters that are references, that are
+ // being passed as references: we only want to pass the pointer (that
+ // is already stored in the parameter, not the address of the pointer,
+ // and not the value of the variable).
+ //
+ public void EmitLoad (EmitContext ec)
+ {
+ Report.Debug (64, "VARIABLE EMIT LOAD", this, Variable, type, loc);
+ if (!prepared)
+ Variable.EmitInstance (ec);
+ Variable.Emit (ec);
+ }
+
+ public void Emit (EmitContext ec, bool leave_copy)
+ {
+ Report.Debug (64, "VARIABLE EMIT", this, Variable, type, IsRef, loc);
+
+ EmitLoad (ec);
+
+ if (IsRef) {
+ if (prepared)
+ ec.ig.Emit (OpCodes.Dup);
+
+ //
+ // If we are a reference, we loaded on the stack a pointer
+ // Now lets load the real value
+ //
+ LoadFromPtr (ec.ig, type);
+ }
+
+ if (leave_copy) {
+ ec.ig.Emit (OpCodes.Dup);
+
+ if (IsRef || Variable.NeedsTemporary) {
+ temp = new LocalTemporary (Type);
+ temp.Store (ec);
+ }
+ }
+ }
+
+ public void EmitAssign (EmitContext ec, Expression source, bool leave_copy,
+ bool prepare_for_load)
+ {
+ Report.Debug (64, "VARIABLE EMIT ASSIGN", this, Variable, type, IsRef,
+ source, loc);
+
+ ILGenerator ig = ec.ig;
+ prepared = prepare_for_load;
+
+ Variable.EmitInstance (ec);
+ if (prepare_for_load && Variable.HasInstance)
+ ig.Emit (OpCodes.Dup);
+ else if (IsRef && !prepared)
+ Variable.Emit (ec);
+
+ source.Emit (ec);
+
+ if (leave_copy) {
+ ig.Emit (OpCodes.Dup);
+ if (IsRef || Variable.NeedsTemporary) {
+ temp = new LocalTemporary (Type);
+ temp.Store (ec);
+ }
+ }
+
+ if (IsRef)
+ StoreFromPtr (ig, type);
+ else
+ Variable.EmitAssign (ec);
+
+ if (temp != null) {
+ temp.Emit (ec);
+ temp.Release (ec);
+ }
+ }
+
+ public void AddressOf (EmitContext ec, AddressOp mode)
+ {
+ Variable.EmitInstance (ec);
+ Variable.EmitAddressOf (ec);
+ }
+ }
+
+ /// <summary>
+ /// Local variables
+ /// </summary>
+ public class LocalVariableReference : VariableReference, IVariable {
+ public readonly string Name;
+ public readonly Block Block;
+ public LocalInfo local_info;
+ bool is_readonly;
+ Variable variable;
+
+ public LocalVariableReference (Block block, string name, Location l)
+ {
+ Block = block;
+ Name = name;
+ loc = l;
+ eclass = ExprClass.Variable;
+ }
+
+ //
+ // Setting `is_readonly' to false will allow you to create a writable
+ // reference to a read-only variable. This is used by foreach and using.
+ //
+ public LocalVariableReference (Block block, string name, Location l,
+ LocalInfo local_info, bool is_readonly)
+ : this (block, name, l)
+ {
+ this.local_info = local_info;
+ this.is_readonly = is_readonly;
+ }
+
+ public VariableInfo VariableInfo {
+ get { return local_info.VariableInfo; }
+ }
+
+ public override bool IsRef {
+ get { return false; }
+ }
+
+ public bool IsReadOnly {
+ get { return is_readonly; }
+ }
+
+ public bool VerifyAssigned (EmitContext ec)
{
VariableInfo variable_info = local_info.VariableInfo;
return variable_info == null || variable_info.IsAssigned (ec, loc);
}
- protected Expression DoResolveBase (EmitContext ec, Expression lvalue_right_side)
+ void ResolveLocalInfo ()
{
if (local_info == null) {
local_info = Block.GetLocalInfo (Name);
-
- // is out param
- if (lvalue_right_side == EmptyExpression.OutAccess)
- local_info.Used = true;
-
is_readonly = local_info.ReadOnly;
}
+ }
+ protected Expression DoResolveBase (EmitContext ec)
+ {
type = local_info.VariableType;
- VariableInfo variable_info = local_info.VariableInfo;
- if (lvalue_right_side != null){
- if (is_readonly){
- if (lvalue_right_side is LocalVariableReference || lvalue_right_side == EmptyExpression.OutAccess)
- Report.Error (1657, loc, "Cannot pass `{0}' as a ref or out argument because it is a `{1}'",
- Name, local_info.GetReadOnlyContext ());
- else if (lvalue_right_side == EmptyExpression.LValueMemberAccess)
- Report.Error (1654, loc, "Cannot assign to members of `{0}' because it is a `{1}'",
- Name, local_info.GetReadOnlyContext ());
- else
- Report.Error (1656, loc, "Cannot assign to `{0}' because it is a `{1}'",
- Name, local_info.GetReadOnlyContext ());
- return null;
- }
-
- if (variable_info != null)
- variable_info.SetAssigned (ec);
- }
-
Expression e = Block.GetConstantExpression (Name);
- if (e != null) {
- local_info.Used = true;
- eclass = ExprClass.Value;
+ if (e != null)
return e.Resolve (ec);
- }
if (!VerifyAssigned (ec))
return null;
- if (lvalue_right_side == null)
- local_info.Used = true;
-
- if (ec.CurrentAnonymousMethod != null){
- //
- // If we are referencing a variable from the external block
- // flag it for capturing
- //
- if ((local_info.Block.Toplevel != ec.CurrentBlock.Toplevel) ||
- ec.CurrentAnonymousMethod.IsIterator)
- {
- if (local_info.AddressTaken){
- AnonymousMethod.Error_AddressOfCapturedVar (local_info.Name, loc);
- return null;
- }
- ec.CaptureVariable (local_info);
+ //
+ // If we are referencing a variable from the external block
+ // flag it for capturing
+ //
+ if (ec.MustCaptureVariable (local_info)) {
+ if (local_info.AddressTaken){
+ AnonymousMethod.Error_AddressOfCapturedVar (local_info.Name, loc);
+ return null;
}
+
+ ScopeInfo scope = local_info.Block.CreateScopeInfo ();
+ variable = scope.AddLocal (local_info);
+ type = variable.Type;
}
return this;
}
-
+
public override Expression DoResolve (EmitContext ec)
{
- return DoResolveBase (ec, null);
+ ResolveLocalInfo ();
+ local_info.Used = true;
+ return DoResolveBase (ec);
}
override public Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
- return DoResolveBase (ec, right_side);
+ ResolveLocalInfo ();
+
+ if (is_readonly) {
+ int code;
+ string msg;
+ if (right_side == EmptyExpression.OutAccess) {
+ code = 1657; msg = "Cannot pass `{0}' as a ref or out argument because it is a `{1}'";
+ } else if (right_side == EmptyExpression.LValueMemberAccess) {
+ code = 1654; msg = "Cannot assign to members of `{0}' because it is a `{1}'";
+ } else if (right_side == EmptyExpression.LValueMemberOutAccess) {
+ code = 1655; msg = "Cannot pass members of `{0}' as ref or out arguments because it is a `{1}'";
+ } else {
+ code = 1656; msg = "Cannot assign to `{0}' because it is a `{1}'";
+ }
+ Report.Error (code, loc, msg, Name, local_info.GetReadOnlyContext ());
+ return null;
+ }
+
+ // is out param
+ if (right_side == EmptyExpression.OutAccess)
+ local_info.Used = true;
+
+ if (VariableInfo != null)
+ VariableInfo.SetAssigned (ec);
+
+ return DoResolveBase (ec);
}
public bool VerifyFixed ()
return true;
}
- public override int GetHashCode()
+ public override int GetHashCode ()
{
return Name.GetHashCode ();
}
return Name == lvr.Name && Block == lvr.Block;
}
- public override void Emit (EmitContext ec)
- {
- ILGenerator ig = ec.ig;
-
- if (local_info.FieldBuilder == null){
- //
- // A local variable on the local CLR stack
- //
- ig.Emit (OpCodes.Ldloc, local_info.LocalBuilder);
- } else {
- //
- // A local variable captured by anonymous methods.
- //
- if (!prepared)
- ec.EmitCapturedVariableInstance (local_info);
-
- ig.Emit (OpCodes.Ldfld, local_info.FieldBuilder);
- }
- }
-
- public void Emit (EmitContext ec, bool leave_copy)
- {
- Emit (ec);
- if (leave_copy){
- ec.ig.Emit (OpCodes.Dup);
- if (local_info.FieldBuilder != null){
- temp = new LocalTemporary (ec, Type);
- temp.Store (ec);
- }
- }
- }
-
- public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
- {
- ILGenerator ig = ec.ig;
- prepared = prepare_for_load;
-
- if (local_info.FieldBuilder == null){
- //
- // A local variable on the local CLR stack
- //
- if (local_info.LocalBuilder == null)
- throw new Exception ("This should not happen: both Field and Local are null");
-
- source.Emit (ec);
- if (leave_copy)
- ec.ig.Emit (OpCodes.Dup);
- ig.Emit (OpCodes.Stloc, local_info.LocalBuilder);
- } else {
- //
- // A local variable captured by anonymous methods or itereators.
- //
- ec.EmitCapturedVariableInstance (local_info);
-
- if (prepare_for_load)
- ig.Emit (OpCodes.Dup);
- source.Emit (ec);
- if (leave_copy){
- ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, Type);
- temp.Store (ec);
- }
- ig.Emit (OpCodes.Stfld, local_info.FieldBuilder);
- if (temp != null)
- temp.Emit (ec);
- }
- }
-
- public void AddressOf (EmitContext ec, AddressOp mode)
- {
- ILGenerator ig = ec.ig;
-
- if (local_info.FieldBuilder == null){
- //
- // A local variable on the local CLR stack
- //
- ig.Emit (OpCodes.Ldloca, local_info.LocalBuilder);
- } else {
- //
- // A local variable captured by anonymous methods or iterators
- //
- ec.EmitCapturedVariableInstance (local_info);
- ig.Emit (OpCodes.Ldflda, local_info.FieldBuilder);
- }
+ public override Variable Variable {
+ get { return variable != null ? variable : local_info.Variable; }
}
public override string ToString ()
/// This represents a reference to a parameter in the intermediate
/// representation.
/// </summary>
- public class ParameterReference : Expression, IAssignMethod, IMemoryLocation, IVariable {
+ public class ParameterReference : VariableReference, IVariable {
Parameter par;
string name;
int idx;
Block block;
VariableInfo vi;
- public bool is_ref, is_out, prepared;
+ public bool is_ref, is_out;
public bool IsOut {
get {
}
}
- public bool IsRef {
+ public override bool IsRef {
get {
return is_ref;
}
}
- LocalTemporary temp;
+ public string Name {
+ get {
+ return name;
+ }
+ }
+
+ public Parameter Parameter {
+ get {
+ return par;
+ }
+ }
+
+ Variable variable;
public ParameterReference (Parameter par, Block block, int idx, Location loc)
{
get { return vi; }
}
+ public override Variable Variable {
+ get { return variable != null ? variable : par.Variable; }
+ }
+
public bool VerifyFixed ()
{
// A parameter is fixed if it's a value parameter (i.e., no modifier like out, ref, param).
if (is_out)
vi = block.ParameterMap [idx];
- if (ec.CurrentAnonymousMethod != null){
- if (is_ref && !block.Toplevel.IsLocalParameter (name)){
- Report.Error (1628, Location, "Cannot use ref or out parameter `{0}' inside an anonymous method block",
- par.Name);
- return false;
- }
+ AnonymousContainer am = ec.CurrentAnonymousMethod;
+ if (am == null)
+ return true;
- //
- // If we are referencing the parameter from the external block
- // flag it for capturing
- //
- //Console.WriteLine ("Is parameter `{0}' local? {1}", name, block.IsLocalParameter (name));
- if (!block.Toplevel.IsLocalParameter (name)){
- ec.CaptureParameter (name, type, idx);
+ if (is_ref && !block.Toplevel.IsLocalParameter (name)){
+ Report.Error (1628, Location,
+ "Cannot use ref or out parameter `{0}' inside an " +
+ "anonymous method block", par.Name);
+ return false;
+ }
+
+ if (!am.IsIterator && block.Toplevel.IsLocalParameter (name))
+ return true;
+
+ AnonymousMethodHost host = null;
+ ToplevelBlock toplevel = block.Toplevel;
+ while (toplevel != null) {
+ if (toplevel.IsLocalParameter (name)) {
+ host = toplevel.AnonymousMethodHost;
+ break;
}
+
+ toplevel = toplevel.Container;
}
+ variable = host.AddParameter (par, idx);
+ type = variable.Type;
return true;
}
if (!DoResolveBase (ec))
return null;
- if (is_out && ec.DoFlowAnalysis && (!ec.OmitStructFlowAnalysis || !vi.TypeInfo.IsStruct) && !IsAssigned (ec, loc))
+ if (is_out && ec.DoFlowAnalysis &&
+ (!ec.OmitStructFlowAnalysis || !vi.TypeInfo.IsStruct) && !IsAssigned (ec, loc))
return null;
return this;
ig.Emit (OpCodes.Ldarg, x);
}
- //
- // This method is used by parameters that are references, that are
- // being passed as references: we only want to pass the pointer (that
- // is already stored in the parameter, not the address of the pointer,
- // and not the value of the variable).
- //
- public void EmitLoad (EmitContext ec)
- {
- ILGenerator ig = ec.ig;
- int arg_idx = idx;
-
- if (!ec.MethodIsStatic)
- arg_idx++;
-
- EmitLdArg (ig, arg_idx);
-
- //
- // FIXME: Review for anonymous methods
- //
- }
-
- public override void Emit (EmitContext ec)
- {
- Emit (ec, false);
- }
-
- public void Emit (EmitContext ec, bool leave_copy)
- {
- ILGenerator ig = ec.ig;
- int arg_idx = idx;
-
- if (ec.HaveCaptureInfo && ec.IsParameterCaptured (name)){
- ec.EmitParameter (name, leave_copy, prepared, ref temp);
- return;
- }
-
- if (!ec.MethodIsStatic)
- arg_idx++;
-
- EmitLdArg (ig, arg_idx);
-
- if (is_ref) {
- if (prepared)
- ec.ig.Emit (OpCodes.Dup);
-
- //
- // If we are a reference, we loaded on the stack a pointer
- // Now lets load the real value
- //
- LoadFromPtr (ig, type);
- }
-
- if (leave_copy) {
- ec.ig.Emit (OpCodes.Dup);
-
- if (is_ref) {
- temp = new LocalTemporary (ec, type);
- temp.Store (ec);
- }
- }
- }
-
- public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
- {
- prepared = prepare_for_load;
- if (ec.HaveCaptureInfo && ec.IsParameterCaptured (name)){
- ec.EmitAssignParameter (name, source, leave_copy, prepare_for_load, ref temp);
- return;
- }
-
- ILGenerator ig = ec.ig;
- int arg_idx = idx;
-
-
-
- if (!ec.MethodIsStatic)
- arg_idx++;
-
- if (is_ref && !prepared)
- EmitLdArg (ig, arg_idx);
-
- source.Emit (ec);
-
- if (leave_copy)
- ec.ig.Emit (OpCodes.Dup);
-
- if (is_ref) {
- if (leave_copy) {
- temp = new LocalTemporary (ec, type);
- temp.Store (ec);
- }
-
- StoreFromPtr (ig, type);
-
- if (temp != null)
- temp.Emit (ec);
- } else {
- if (arg_idx <= 255)
- ig.Emit (OpCodes.Starg_S, (byte) arg_idx);
- else
- ig.Emit (OpCodes.Starg, arg_idx);
- }
- }
-
- public void AddressOf (EmitContext ec, AddressOp mode)
- {
- if (ec.HaveCaptureInfo && ec.IsParameterCaptured (name)){
- ec.EmitAddressOfParameter (name);
- return;
- }
-
- int arg_idx = idx;
-
- if (!ec.MethodIsStatic)
- arg_idx++;
-
- if (is_ref){
- if (arg_idx <= 255)
- ec.ig.Emit (OpCodes.Ldarg_S, (byte) arg_idx);
- else
- ec.ig.Emit (OpCodes.Ldarg, arg_idx);
- } else {
- if (arg_idx <= 255)
- ec.ig.Emit (OpCodes.Ldarga_S, (byte) arg_idx);
- else
- ec.ig.Emit (OpCodes.Ldarga, arg_idx);
- }
- }
-
public override string ToString ()
{
return "ParameterReference[" + name + "]";
TypeManager.CSharpName (a.Expr.Type);
}
- public bool ResolveMethodGroup (EmitContext ec, Location loc)
+ public bool ResolveMethodGroup (EmitContext ec)
{
SimpleName sn = Expr as SimpleName;
if (sn != null)
return true;
}
-
- void Error_LValueRequired (Location loc)
- {
- Report.Error (1510, loc, "A ref or out argument must be an assignable variable");
- }
public bool Resolve (EmitContext ec, Location loc)
{
- bool old_do_flow_analysis = ec.DoFlowAnalysis;
- ec.DoFlowAnalysis = true;
-
- if (ArgType == AType.Ref) {
- ec.InRefOutArgumentResolving = true;
- Expr = Expr.Resolve (ec);
- ec.InRefOutArgumentResolving = false;
- if (Expr == null) {
- ec.DoFlowAnalysis = old_do_flow_analysis;
- return false;
- }
-
- int errors = Report.Errors;
- Expr = Expr.DoResolveLValue (ec, Expr);
- if (Expr == null && errors == Report.Errors)
- Error_LValueRequired (loc);
- } else if (ArgType == AType.Out) {
- int errors = Report.Errors;
- ec.InRefOutArgumentResolving = true;
- Expr = Expr.DoResolveLValue (ec, EmptyExpression.OutAccess);
- ec.InRefOutArgumentResolving = false;
-
- if (Expr == null && errors == Report.Errors)
- Error_LValueRequired (loc);
- }
- else
- Expr = Expr.Resolve (ec);
+ using (ec.With (EmitContext.Flags.DoFlowAnalysis, true)) {
+ // Verify that the argument is readable
+ if (ArgType != AType.Out)
+ Expr = Expr.Resolve (ec);
- ec.DoFlowAnalysis = old_do_flow_analysis;
+ // Verify that the argument is writeable
+ if (Expr != null && (ArgType == AType.Out || ArgType == AType.Ref))
+ Expr = Expr.ResolveLValue (ec, EmptyExpression.OutAccess, loc);
- if (Expr == null)
- return false;
-
- if (ArgType == AType.Expression)
- return true;
- else {
- //
- // Catch errors where fields of a MarshalByRefObject are passed as ref or out
- // This is only allowed for `this'
- //
- FieldExpr fe = Expr as FieldExpr;
- if (fe != null && !fe.IsStatic){
- Expression instance = fe.InstanceExpression;
-
- if (instance.GetType () != typeof (This)){
- if (fe.InstanceExpression.Type.IsSubclassOf (TypeManager.mbr_type)){
- Report.SymbolRelatedToPreviousError (fe.InstanceExpression.Type);
- Report.Warning (197, 1, loc,
- "Passing `{0}' as ref or out or taking its address may cause a runtime exception because it is a field of a marshal-by-reference class",
- fe.GetSignatureForError ());
- return false;
- }
- }
- }
+ return Expr != null;
}
-
- return true;
}
public void Emit (EmitContext ec)
{
- //
- // Ref and Out parameters need to have their addresses taken.
+ if (ArgType != AType.Ref && ArgType != AType.Out) {
+ Expr.Emit (ec);
+ return;
+ }
+
+ AddressOp mode = AddressOp.Store;
+ if (ArgType == AType.Ref)
+ mode |= AddressOp.Load;
+
+ IMemoryLocation ml = (IMemoryLocation) Expr;
+ ParameterReference pr = ml as ParameterReference;
+
//
// ParameterReferences might already be references, so we want
// to pass just the value
//
- if (ArgType == AType.Ref || ArgType == AType.Out){
- AddressOp mode = AddressOp.Store;
-
- if (ArgType == AType.Ref)
- mode |= AddressOp.Load;
-
- if (Expr is ParameterReference){
- ParameterReference pr = (ParameterReference) Expr;
-
- if (pr.IsRef)
- pr.EmitLoad (ec);
- else {
-
- pr.AddressOf (ec, mode);
- }
- } else {
- if (Expr is IMemoryLocation)
- ((IMemoryLocation) Expr).AddressOf (ec, mode);
- else {
- Error_LValueRequired (Expr.Location);
- return;
- }
- }
- } else
- Expr.Emit (ec);
+ if (pr != null && pr.IsRef)
+ pr.EmitLoad (ec);
+ else
+ ml.AddressOf (ec, mode);
}
}
/// q if a->q is better,
/// null if neither is better
/// </summary>
- static Type BetterConversion (EmitContext ec, Argument a, Type p, Type q, Location loc)
+ static Type BetterConversion (EmitContext ec, Argument a, Type p, Type q)
{
Type argument_type = TypeManager.TypeToCoreType (a.Type);
Expression argument_expr = a.Expr;
if (!p.IsGenericParameter && q.IsGenericParameter)
return p;
- if (p.IsGenericType) {
+ if (TypeManager.HasElementType (p)) {
+ Type pe = TypeManager.GetElementType (p);
+ Type qe = TypeManager.GetElementType (q);
+ Type specific = MoreSpecific (pe, qe);
+ if (specific == pe)
+ return p;
+ if (specific == qe)
+ return q;
+ } else if (p.IsGenericType) {
Type[] pargs = TypeManager.GetTypeArguments (p);
Type[] qargs = TypeManager.GetTypeArguments (q);
return p;
if (!p_specific_at_least_once && q_specific_at_least_once)
return q;
- } else if (TypeManager.HasElementType (p)) {
- Type pe = TypeManager.GetElementType (p);
- Type qe = TypeManager.GetElementType (q);
- Type specific = MoreSpecific (pe, qe);
- if (specific == pe)
- return p;
- if (specific == qe)
- return q;
}
return null;
/// </remarks>
static bool BetterFunction (EmitContext ec, ArrayList args, int argument_count,
MethodBase candidate, bool candidate_params,
- MethodBase best, bool best_params, Location loc)
+ MethodBase best, bool best_params)
{
ParameterData candidate_pd = TypeManager.GetParameterData (candidate);
ParameterData best_pd = TypeManager.GetParameterData (best);
continue;
same = false;
- Type better = BetterConversion (ec, a, ct, bt, loc);
+ Type better = BetterConversion (ec, a, ct, bt);
// for each argument, the conversion to 'ct' should be no worse than
// the conversion to 'bt'.
!TypeManager.InferParamsTypeArguments (ec, arguments, ref candidate))
return false;
+ if (TypeManager.IsGenericMethodDefinition (candidate))
+ throw new InternalErrorException ("a generic method definition took part in overload resolution");
+
return IsParamsMethodApplicable (
ec, arguments, arg_count, candidate, do_varargs);
}
ref MethodBase candidate)
{
if (!me.HasTypeArguments &&
- !TypeManager.InferTypeArguments (ec, arguments, ref candidate))
+ !TypeManager.InferTypeArguments (arguments, ref candidate))
return false;
+ if (TypeManager.IsGenericMethodDefinition (candidate))
+ throw new InternalErrorException ("a generic method definition took part in overload resolution");
+
return IsApplicable (ec, arguments, arg_count, candidate);
}
int j = 0;
for (int i = 0; i < methods.Length; ++i) {
MethodBase m = methods [i];
+ Type [] gen_args = m.IsGenericMethod && !m.IsGenericMethodDefinition ? m.GetGenericArguments () : null;
if (TypeManager.IsOverride (m)) {
if (candidate_overrides == null)
candidate_overrides = new ArrayList ();
candidate_overrides.Add (m);
m = TypeManager.TryGetBaseDefinition (m);
+ if (m != null && gen_args != null) {
+ if (!m.IsGenericMethodDefinition)
+ throw new InternalErrorException ("GetBaseDefinition didn't return a GenericMethodDefinition");
+ m = ((MethodInfo) m).MakeGenericMethod (gen_args);
+ }
}
if (m != null)
methods [j++] = m;
if (pd.Count != arg_count)
continue;
- if (!TypeManager.InferTypeArguments (ec, Arguments, ref c))
+ if (!TypeManager.InferTypeArguments (Arguments, ref c))
+ continue;
+
+ if (TypeManager.IsGenericMethodDefinition (c))
continue;
VerifyArgumentsCompat (ec, Arguments, arg_count,
if (pd.Count != arg_count)
continue;
- if (TypeManager.InferTypeArguments (ec, Arguments, ref c))
+ if (TypeManager.InferTypeArguments (Arguments, ref c))
continue;
Report.Error (
if (BetterFunction (ec, Arguments, arg_count,
candidate, cand_params,
- method, method_params, loc)) {
+ method, method_params)) {
method = candidate;
method_params = cand_params;
}
bool cand_params = candidate_to_form != null && candidate_to_form.Contains (candidate);
if (!BetterFunction (ec, Arguments, arg_count,
method, method_params,
- candidate, cand_params,
- loc)) {
+ candidate, cand_params)) {
Report.SymbolRelatedToPreviousError (candidate);
ambiguous = candidate;
}
Location loc)
{
ParameterData pd = TypeManager.GetParameterData (method);
- int pd_count = pd.Count;
-
- for (int j = 0; j < arg_count; j++) {
+ int j;
+ for (j = 0; j < arg_count; j++) {
Argument a = (Argument) Arguments [j];
Expression a_expr = a.Expr;
Type parameter_type = pd.ParameterType (j);
Parameter.Modifier pm = pd.ParameterModifier (j);
-
- if (pm == Parameter.Modifier.PARAMS){
- if ((pm & ~Parameter.Modifier.PARAMS) != a.Modifier) {
- if (!may_fail)
- Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
- return false;
- }
+ Parameter.Modifier am = a.Modifier;
- if (chose_params_expanded)
- parameter_type = TypeManager.GetElementType (parameter_type);
- } else if (pm == Parameter.Modifier.ARGLIST) {
- if (!(a.Expr is Arglist)) {
- if (!may_fail)
- Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
- return false;
- }
+ if (pm == Parameter.Modifier.ARGLIST) {
+ if (!(a.Expr is Arglist))
+ break;
continue;
- } else {
- //
- // Check modifiers
- //
- if (pd.ParameterModifier (j) != a.Modifier){
- if (!may_fail)
- Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
- return false;
- }
}
- //
- // Check Type
- //
- if (!TypeManager.IsEqual (a.Type, parameter_type)){
- Expression conv;
+ if (pm == Parameter.Modifier.PARAMS) {
+ pm = Parameter.Modifier.NONE;
+ if (chose_params_expanded)
+ parameter_type = TypeManager.GetElementType (parameter_type);
+ }
+
+ if (pm != am)
+ break;
- conv = Convert.ImplicitConversion (ec, a_expr, parameter_type, loc);
+ 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;
- if (conv == null) {
- if (!may_fail)
- Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
- return false;
- }
-
- //
// Update the argument with the implicit conversion
- //
if (a_expr != conv)
a.Expr = conv;
}
- if (parameter_type.IsPointer){
- if (!ec.InUnsafe){
- UnsafeError (loc);
- return false;
- }
- }
-
- Parameter.Modifier a_mod = a.Modifier &
- unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
- Parameter.Modifier p_mod = pd.ParameterModifier (j) &
- unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
-
- if (a_mod != p_mod &&
- pd.ParameterModifier (pd_count - 1) != Parameter.Modifier.PARAMS) {
- if (!may_fail) {
- Invocation.Error_InvalidArguments (loc, j, method, null, a, pd);
- }
-
+ if (parameter_type.IsPointer && !ec.InUnsafe) {
+ UnsafeError (loc);
return false;
}
}
- return true;
+ if (j == arg_count)
+ return true;
+
+ if (!may_fail)
+ Error_InvalidArguments (loc, j, method, delegate_type, (Argument) Arguments [j], pd);
+ return false;
}
private bool resolved = false;
}
if (mg.InstanceExpression != null)
- mg.InstanceExpression.CheckMarshallByRefAccess (ec.ContainerType);
+ mg.InstanceExpression.CheckMarshalByRefAccess ();
eclass = ExprClass.Value;
this.method = method;
a.Emit (ec);
if (dup_args) {
ec.ig.Emit (OpCodes.Dup);
- (temps [i] = new LocalTemporary (ec, a.Type)).Store (ec);
+ (temps [i] = new LocalTemporary (a.Type)).Store (ec);
}
}
if (this_arg != null)
this_arg.Emit (ec);
- for (int i = 0; i < top; i ++)
+ for (int i = 0; i < top; i ++) {
temps [i].Emit (ec);
+ temps [i].Release (ec);
+ }
}
if (pd != null && pd.Count > top &&
}
}
- static Type[] GetVarargsTypes (EmitContext ec, MethodBase mb,
- ArrayList arguments)
+ static Type[] GetVarargsTypes (MethodBase mb, ArrayList arguments)
{
ParameterData pd = TypeManager.GetParameterData (mb);
method = TypeManager.void_array_copyto_array_int;
}
- if (ec.TestObsoleteMethodUsage) {
+ if (!ec.IsInObsoleteScope) {
//
// This checks ObsoleteAttribute on the method and on the declaring type
//
((IMemoryLocation)instance_expr).
AddressOf (ec, AddressOp.LoadStore);
} else {
- LocalTemporary temp = new LocalTemporary (ec, iexpr_type);
+ LocalTemporary temp = new LocalTemporary (iexpr_type);
instance_expr.Emit (ec);
temp.Store (ec);
temp.AddressOf (ec, AddressOp.Load);
if (dup_args) {
ig.Emit (OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0) {
- this_arg = new LocalTemporary (ec, t);
+ this_arg = new LocalTemporary (t);
this_arg.Store (ec);
}
}
call_op = OpCodes.Callvirt;
if ((method.CallingConvention & CallingConventions.VarArgs) != 0) {
- Type[] varargs_types = GetVarargsTypes (ec, method, Arguments);
+ Type[] varargs_types = GetVarargsTypes (method, Arguments);
ig.EmitCall (call_op, (MethodInfo) method, varargs_types);
return;
}
if (texpr == null)
return null;
- type = texpr.ResolveType (ec);
+ type = texpr.Type;
if (Arguments == null) {
Expression c = Constantify (type);
MethodGroupExpr mg = ml as MethodGroupExpr;
if (mg == null) {
- ml.Error_UnexpectedKind (ec, "method group", loc);
+ ml.Error_UnexpectedKind (ec.DeclContainer, "method group", loc);
return null;
}
// We need to create a new LocalTemporary each time since
// you can't share LocalBuilders among ILGeneators.
if (!value_target_set)
- value_target = new LocalTemporary (ec, type);
+ value_target = new LocalTemporary (type);
ml = (IMemoryLocation) value_target;
ml.AddressOf (ec, AddressOp.Store);
}
if (!value_target_set)
- value_target = new LocalTemporary (ec, type);
+ value_target = new LocalTemporary (type);
IMemoryLocation ml = (IMemoryLocation) value_target;
ml.AddressOf (ec, AddressOp.Store);
ArrayList array_data;
- Hashtable bounds;
-
- //
- // The number of array initializers that we can handle
- // via the InitializeArray method - through EmitStaticInitializers
- //
- int num_automatic_initializers;
+ IDictionary bounds;
- const int max_automatic_initializers = 6;
+ // The number of constants in array initializers
+ int const_initializers_count;
public ArrayCreation (Expression requested_base_type, ArrayList exprs, string rank, ArrayList initializers, Location l)
{
Error (178, "Invalid rank specifier: expected `,' or `]'");
}
- public bool CheckIndices (EmitContext ec, ArrayList probe, int idx, bool specified_dims)
+ bool CheckIndices (EmitContext ec, ArrayList probe, int idx, bool specified_dims)
{
if (specified_dims) {
Argument a = (Argument) arguments [idx];
Error_IncorrectArrayInitializer ();
return false;
}
- if (specified_dims && (idx + 1 >= arguments.Count)){
+ if (idx + 1 >= dimensions){
Error (623, "Array initializers can only be used in a variable or field initializer. Try using a new expression instead");
return false;
}
Expression tmp = (Expression) o;
tmp = tmp.Resolve (ec);
- probe [i] = tmp;
if (tmp == null)
return false;
- // Console.WriteLine ("I got: " + tmp);
- // Handle initialization from vars, fields etc.
-
Expression conv = Convert.ImplicitConversionRequired (
ec, tmp, underlying_type, loc);
if (conv == null)
return false;
- if (conv is StringConstant || conv is DecimalConstant || conv is NullCast) {
- // These are subclasses of Constant that can appear as elements of an
- // array that cannot be statically initialized (with num_automatic_initializers
- // > max_automatic_initializers), so num_automatic_initializers should be left as zero.
- array_data.Add (conv);
- } else if (conv is Constant) {
- // These are the types of Constant that can appear in arrays that can be
- // statically allocated.
- array_data.Add (conv);
- num_automatic_initializers++;
- } else
- array_data.Add (conv);
+ // Initializers with the default values can be ignored
+ Constant c = tmp as Constant;
+ if (c != null) {
+ if (c.IsDefaultInitializer (array_element_type)) {
+ conv = null;
+ }
+ else {
+ ++const_initializers_count;
+ }
+ } else {
+ // Used to invalidate static initializer
+ const_initializers_count = int.MinValue;
+ }
+
+ array_data.Add (conv);
}
}
return true;
}
- public void UpdateIndices (EmitContext ec)
+ public void UpdateIndices ()
{
int i = 0;
for (ArrayList probe = initializers; probe != null;) {
arguments.Add (new Argument (e, Argument.AType.Expression));
bounds [i++] = probe.Count;
- probe = null;
+ return;
}
}
}
- public bool ValidateInitializers (EmitContext ec, Type array_type)
+ bool ResolveInitializers (EmitContext ec)
{
if (initializers == null) {
- if (expect_initializers)
- return false;
- else
- return true;
+ return !expect_initializers;
}
if (underlying_type == null)
// will need to store them in the byte blob later
//
array_data = new ArrayList ();
- bounds = new Hashtable ();
+ bounds = new System.Collections.Specialized.HybridDictionary ();
- bool ret;
+ if (arguments != null)
+ return CheckIndices (ec, initializers, 0, true);
- if (arguments != null) {
- ret = CheckIndices (ec, initializers, 0, true);
- return ret;
- } else {
- arguments = new ArrayList ();
+ arguments = new ArrayList ();
- ret = CheckIndices (ec, initializers, 0, false);
-
- if (!ret)
- return false;
+ if (!CheckIndices (ec, initializers, 0, false))
+ return false;
- UpdateIndices (ec);
+ UpdateIndices ();
- if (arguments.Count != dimensions) {
- Error_IncorrectArrayInitializer ();
- return false;
- }
-
- return ret;
+ if (arguments.Count != dimensions) {
+ Error_IncorrectArrayInitializer ();
+ return false;
}
+
+ return true;
}
//
if (array_type_expr == null)
return false;
- type = array_type_expr.ResolveType (ec);
+ type = array_type_expr.Type;
underlying_type = TypeManager.GetElementType (type);
dimensions = type.GetArrayRank ();
public override Expression DoResolve (EmitContext ec)
{
- int arg_count;
+ if (type != null)
+ return this;
if (!LookupType (ec))
return null;
+ array_element_type = TypeManager.GetElementType (type);
+ if (array_element_type.IsAbstract && array_element_type.IsSealed) {
+ Report.Error (719, loc, "`{0}': array elements cannot be of static type", TypeManager.CSharpName (array_element_type));
+ return null;
+ }
+
//
// First step is to validate the initializers and fill
// in any missing bits
//
- if (!ValidateInitializers (ec, type))
+ if (!ResolveInitializers (ec))
return null;
+ int arg_count;
if (arguments == null)
arg_count = 0;
else {
}
}
- array_element_type = TypeManager.GetElementType (type);
-
- if (array_element_type.IsAbstract && array_element_type.IsSealed) {
- Report.Error (719, loc, "`{0}': array elements cannot be of static type", TypeManager.CSharpName (array_element_type));
- return null;
- }
-
if (arg_count == 1) {
is_one_dimensional = true;
eclass = ExprClass.Value;
AllBindingFlags, loc);
if (!(ml is MethodGroupExpr)) {
- ml.Error_UnexpectedKind (ec, "method group", loc);
+ ml.Error_UnexpectedKind (ec.DeclContainer, "method group", loc);
return null;
}
}
}
- public static byte [] MakeByteBlob (ArrayList array_data, Type underlying_type, Location loc)
+ byte [] MakeByteBlob ()
{
int factor;
byte [] data;
data = new byte [(count * factor + 4) & ~3];
int idx = 0;
-
+
for (int i = 0; i < count; ++i) {
object v = array_data [i];
FieldBuilder fb;
ILGenerator ig = ec.ig;
- byte [] data = MakeByteBlob (array_data, underlying_type, loc);
+ byte [] data = MakeByteBlob ();
fb = RootContext.MakeStaticData (data);
ILGenerator ig = ec.ig;
int dims = bounds.Count;
int [] current_pos = new int [dims];
- int top = array_data.Count;
MethodInfo set = null;
if (dims != 1){
- Type [] args;
- ModuleBuilder mb = null;
- mb = CodeGen.Module.Builder;
- args = new Type [dims + 1];
+ Type [] args = new Type [dims + 1];
- int j;
- for (j = 0; j < dims; j++)
+ for (int j = 0; j < dims; j++)
args [j] = TypeManager.int32_type;
-
- args [j] = array_element_type;
+ args [dims] = array_element_type;
- set = mb.GetArrayMethod (
+ set = CodeGen.Module.Builder.GetArrayMethod (
type, "Set",
CallingConventions.HasThis | CallingConventions.Standard,
TypeManager.void_type, args);
}
-
- for (int i = 0; i < top; i++){
- Expression e = null;
+ for (int i = 0; i < array_data.Count; i++){
- if (array_data [i] is Expression)
- e = (Expression) array_data [i];
+ Expression e = (Expression)array_data [i];
if (e != null) {
- //
- // Basically we do this for string literals and
- // other non-literal expressions
- //
- if (e is EnumConstant){
- e = ((EnumConstant) e).Child;
- }
-
- if (e is StringConstant || e is DecimalConstant || !(e is Constant) ||
- num_automatic_initializers <= max_automatic_initializers) {
- Type etype = e.Type;
+ Type etype = e.Type;
- ig.Emit (OpCodes.Dup);
+ ig.Emit (OpCodes.Dup);
- for (int idx = 0; idx < dims; idx++)
- IntConstant.EmitInt (ig, current_pos [idx]);
+ for (int idx = 0; idx < dims; idx++)
+ IntConstant.EmitInt (ig, current_pos [idx]);
- //
- // If we are dealing with a struct, get the
- // address of it, so we can store it.
- //
- if ((dims == 1) &&
- TypeManager.IsValueType (etype) &&
- (!TypeManager.IsBuiltinOrEnum (etype) ||
- etype == TypeManager.decimal_type)) {
- if (e is New){
- New n = (New) e;
-
- //
- // Let new know that we are providing
- // the address where to store the results
- //
- n.DisableTemporaryValueType ();
- }
+ //
+ // If we are dealing with a struct, get the
+ // address of it, so we can store it.
+ //
+ if ((dims == 1) &&
+ TypeManager.IsValueType (etype) &&
+ (!TypeManager.IsBuiltinOrEnum (etype) ||
+ etype == TypeManager.decimal_type)) {
+ if (e is New){
+ New n = (New) e;
- ig.Emit (OpCodes.Ldelema, etype);
+ //
+ // Let new know that we are providing
+ // the address where to store the results
+ //
+ n.DisableTemporaryValueType ();
}
- e.Emit (ec);
-
- if (dims == 1) {
- bool is_stobj, has_type_arg;
- OpCode op = ArrayAccess.GetStoreOpcode (
- etype, out is_stobj,
- out has_type_arg);
- if (is_stobj)
- ig.Emit (OpCodes.Stobj, etype);
- else if (has_type_arg)
- ig.Emit (op, etype);
- else
- ig.Emit (op);
- } else
- ig.Emit (OpCodes.Call, set);
+ ig.Emit (OpCodes.Ldelema, etype);
}
+
+ e.Emit (ec);
+
+ if (dims == 1) {
+ bool is_stobj, has_type_arg;
+ OpCode op = ArrayAccess.GetStoreOpcode (etype, out is_stobj, out has_type_arg);
+ if (is_stobj)
+ ig.Emit (OpCodes.Stobj, etype);
+ else if (has_type_arg)
+ ig.Emit (op, etype);
+ else
+ ig.Emit (op);
+ } else
+ ig.Emit (OpCodes.Call, set);
+
}
//
ig.Emit (OpCodes.Newobj, (MethodInfo) new_method);
}
- if (initializers != null){
- //
- // FIXME: Set this variable correctly.
- //
- bool dynamic_initializers = true;
+ if (initializers == null)
+ return;
- // This will never be true for array types that cannot be statically
- // initialized. num_automatic_initializers will always be zero. See
- // CheckIndices.
- if (num_automatic_initializers > max_automatic_initializers)
- EmitStaticInitializers (ec);
-
- if (dynamic_initializers)
- EmitDynamicInitializers (ec);
+ // This is a treshold for static initializers
+ // I tried to make more accurate but it seems to me that Array.Initialize is
+ // always slower (managed -> unmanaged switch?)
+ const int max_automatic_initializers = 200;
+
+ if (const_initializers_count > max_automatic_initializers && TypeManager.IsPrimitiveType (array_element_type)) {
+ EmitStaticInitializers (ec);
+ return;
}
+
+ EmitDynamicInitializers (ec);
}
- public object EncodeAsAttribute ()
+ public override bool GetAttributableValue (Type valueType, out object value)
{
if (!is_one_dimensional){
- Report.Error (-211, Location, "attribute can not encode multi-dimensional arrays");
- return null;
+// Report.Error (-211, Location, "attribute can not encode multi-dimensional arrays");
+ return base.GetAttributableValue (null, out value);
}
- if (array_data == null){
- Report.Error (-212, Location, "array should be initialized when passing it to an attribute");
- return null;
+ if (array_data == null) {
+ Constant c = (Constant)((Argument)arguments [0]).Expr;
+ if (c.IsDefaultValue) {
+ value = Array.CreateInstance (array_element_type, 0);
+ return true;
+ }
+// Report.Error (-212, Location, "array should be initialized when passing it to an attribute");
+ return base.GetAttributableValue (null, out value);
}
- object [] ret = new object [array_data.Count];
- int i = 0;
- foreach (Expression e in array_data){
- object v;
-
- if (e is NullLiteral)
- v = null;
- else {
- if (!Attribute.GetAttributeArgumentExpression (e, Location, array_element_type, out v))
- return null;
+ Array ret = Array.CreateInstance (array_element_type, array_data.Count);
+ object element_value;
+ for (int i = 0; i < ret.Length; ++i)
+ {
+ Expression e = (Expression)array_data [i];
+ if (e == null) // Is null when initializer is optimized away
+ e = (Expression)initializers [i];
+
+ if (!e.GetAttributableValue (array_element_type, out element_value)) {
+ value = null;
+ return false;
}
- ret [i++] = v;
+ ret.SetValue (element_value, i);
}
- return ret;
+ value = ret;
+ return true;
+ }
+ }
+
+ public sealed class CompilerGeneratedThis : This
+ {
+ public static This Instance = new CompilerGeneratedThis ();
+
+ private CompilerGeneratedThis ()
+ : base (Location.Null)
+ {
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ eclass = ExprClass.Variable;
+ type = ec.ContainerType;
+ variable = new SimpleThis (type);
+ return this;
}
}
/// <summary>
/// Represents the `this' construct
/// </summary>
- public class This : Expression, IAssignMethod, IMemoryLocation, IVariable {
+ public class This : VariableReference, IVariable
+ {
Block block;
VariableInfo variable_info;
-
+ protected Variable variable;
+ bool is_struct;
+
public This (Block block, Location loc)
{
this.loc = loc;
return !TypeManager.IsValueType (Type);
}
+ public override bool IsRef {
+ get { return is_struct; }
+ }
+
+ public override Variable Variable {
+ get { return variable; }
+ }
+
public bool ResolveBase (EmitContext ec)
{
eclass = ExprClass.Variable;
else
type = ec.ContainerType;
+ is_struct = ec.TypeContainer is Struct;
+
if (ec.IsStatic) {
- Error (26, "Keyword `this' is not valid in a static property, static method, or static field initializer");
+ Error (26, "Keyword `this' is not valid in a static property, " +
+ "static method, or static field initializer");
return false;
}
- if (block != null && block.Toplevel.ThisVariable != null)
- variable_info = block.Toplevel.ThisVariable.VariableInfo;
+ if (block != null) {
+ if (block.Toplevel.ThisVariable != null)
+ variable_info = block.Toplevel.ThisVariable.VariableInfo;
+
+ AnonymousContainer am = ec.CurrentAnonymousMethod;
+ if (is_struct && (am != null) && !am.IsIterator) {
+ Report.Error (1673, loc, "Anonymous methods inside structs " +
+ "cannot access instance members of `this'. " +
+ "Consider copying `this' to a local variable " +
+ "outside the anonymous method and using the " +
+ "local instead.");
+ return false;
+ }
+
+ AnonymousMethodHost host = block.Toplevel.AnonymousMethodHost;
+ if ((host != null) && (!is_struct || host.IsIterator)) {
+ variable = host.CaptureThis ();
+ type = variable.Type;
+ is_struct = false;
+ }
+ }
- if (ec.CurrentAnonymousMethod != null)
- ec.CaptureThis ();
+ if (variable == null)
+ variable = new SimpleThis (type);
return true;
}
if (!ResolveBase (ec))
return null;
- if ((variable_info != null) && !(type.IsValueType && ec.OmitStructFlowAnalysis) && !variable_info.IsAssigned (ec)) {
- Error (188, "The `this' object cannot be used before all of its fields are assigned to");
+ if ((variable_info != null) && !(type.IsValueType && ec.OmitStructFlowAnalysis) &&
+ !variable_info.IsAssigned (ec)) {
+ Error (188, "The `this' object cannot be used before all of its " +
+ "fields are assigned to");
variable_info.SetAssigned (ec);
return this;
}
return this;
}
-
- public void Emit (EmitContext ec, bool leave_copy)
- {
- Emit (ec);
- if (leave_copy)
- ec.ig.Emit (OpCodes.Dup);
- }
-
- public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
- {
- ILGenerator ig = ec.ig;
-
- if (ec.TypeContainer is Struct){
- ec.EmitThis (false);
- source.Emit (ec);
-
- LocalTemporary t = null;
- if (leave_copy) {
- t = new LocalTemporary (ec, type);
- ec.ig.Emit (OpCodes.Dup);
- t.Store (ec);
- }
-
- ig.Emit (OpCodes.Stobj, type);
-
- if (leave_copy)
- t.Emit (ec);
- } else {
- throw new Exception ("how did you get here");
- }
- }
-
- public override void Emit (EmitContext ec)
- {
- ILGenerator ig = ec.ig;
-
- ec.EmitThis (false);
- if (ec.TypeContainer is Struct)
- ig.Emit (OpCodes.Ldobj, type);
- }
-
public override int GetHashCode()
{
return block.GetHashCode ();
return block == t.block;
}
- public void AddressOf (EmitContext ec, AddressOp mode)
+ protected class SimpleThis : Variable
{
- ec.EmitThis (true);
+ Type type;
- // FIMXE
- // FIGURE OUT WHY LDARG_S does not work
- //
- // consider: struct X { int val; int P { set { val = value; }}}
- //
- // Yes, this looks very bad. Look at `NOTAS' for
- // an explanation.
- // ec.ig.Emit (OpCodes.Ldarga_S, (byte) 0);
+ public SimpleThis (Type type)
+ {
+ this.type = type;
+ }
+
+ public override Type Type {
+ get { return type; }
+ }
+
+ public override bool HasInstance {
+ get { return false; }
+ }
+
+ public override bool NeedsTemporary {
+ get { return false; }
+ }
+
+ public override void EmitInstance (EmitContext ec)
+ {
+ // Do nothing.
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldarg_0);
+ }
+
+ public override void EmitAssign (EmitContext ec)
+ {
+ throw new InvalidOperationException ();
+ }
+
+ public override void EmitAddressOf (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldarg_0);
+ }
}
}
this.loc = loc;
}
- public bool ResolveBase (EmitContext ec)
+ public override Expression DoResolve (EmitContext ec)
{
eclass = ExprClass.Variable;
type = TypeManager.runtime_argument_handle_type;
- return true;
- }
-
- public override Expression DoResolve (EmitContext ec)
- {
- if (!ResolveBase (ec))
- return null;
- if (ec.IsFieldInitializer || !ec.CurrentBlock.Toplevel.HasVarargs) {
+ if (ec.IsFieldInitializer || !ec.CurrentBlock.Toplevel.HasVarargs)
+ {
Error (190, "The __arglist construct is valid only within " +
- "a variable argument method.");
+ "a variable argument method");
return null;
}
/// Implements the typeof operator
/// </summary>
public class TypeOf : Expression {
- public Expression QueriedType;
+ readonly Expression QueriedType;
protected Type typearg;
public TypeOf (Expression queried_type, Location l)
if (texpr == null)
return null;
- typearg = texpr.ResolveType (ec);
+ typearg = texpr.Type;
if (typearg == TypeManager.void_type) {
Error (673, "System.Void cannot be used from C#. Use typeof (void) to get the void type object");
ec.ig.Emit (OpCodes.Call, TypeManager.system_type_get_type_from_handle);
}
- public Type TypeArg {
- get { return typearg; }
+ public override bool GetAttributableValue (Type valueType, out object value)
+ {
+ if (typearg.ContainsGenericParameters) {
+ Report.SymbolRelatedToPreviousError(typearg);
+ Report.Error(416, loc, "`{0}': an attribute argument cannot use type parameters",
+ TypeManager.CSharpName(typearg));
+ value = null;
+ return false;
+ }
+
+ if (valueType == TypeManager.object_type) {
+ value = (object)typearg;
+ return true;
+ }
+ value = typearg;
+ return true;
+ }
+
+ public Type TypeArgument
+ {
+ get
+ {
+ return typearg;
+ }
}
}
return null;
}
- type_queried = texpr.ResolveType (ec);
+ type_queried = texpr.Type;
+ if (type_queried.IsEnum)
+ type_queried = TypeManager.EnumToUnderlying (type_queried);
+
+ if (type_queried == TypeManager.void_type) {
+ Expression.Error_VoidInvalidInTheContext (loc);
+ return null;
+ }
int size_of = GetTypeSize (type_queried);
if (size_of > 0) {
loc = l;
}
- public override FullNamedExpression ResolveAsTypeStep (EmitContext ec, bool silent)
+ public override FullNamedExpression ResolveAsTypeStep (IResolveContext ec, bool silent)
{
if (alias == "global")
return new MemberAccess (RootNamespace.Global, identifier, loc).ResolveAsTypeStep (ec, silent);
Report.Error (431, loc, "`{0}' cannot be used with '::' since it denotes a type", alias);
return null;
}
- return new MemberAccess (fne, identifier, loc).ResolveAsTypeStep (ec, silent);
+ return new MemberAccess (fne, identifier).ResolveAsTypeStep (ec, silent);
}
public override Expression DoResolve (EmitContext ec)
}
}
- Expression retval = new MemberAccess (fne, identifier, loc).DoResolve (ec);
+ Expression retval = new MemberAccess (fne, identifier).DoResolve (ec);
if (retval == null)
return null;
Expression expr;
TypeArguments args;
- // TODO: Location can be removed
- public MemberAccess (Expression expr, string id, Location l)
+ public MemberAccess (Expression expr, string id)
+ : this (expr, id, expr.Location)
+ {
+ }
+
+ public MemberAccess (Expression expr, string identifier, Location loc)
{
this.expr = expr;
- Identifier = id;
- loc = expr.Location;
+ Identifier = identifier;
+ this.loc = loc;
}
- public MemberAccess (Expression expr, string id, TypeArguments args,
- Location l)
- : this (expr, id, l)
+ public MemberAccess (Expression expr, string id, TypeArguments args)
+ : this (expr, id)
{
this.args = args;
}
if ((retval != null) && (args != null))
retval = new ConstructedType (retval, args, loc).ResolveAsTypeStep (ec, false);
if (retval == null)
- Report.Error (234, loc, "The type or namespace name `{0}' does not exist in the namespace `{1}'. Are you missing an assembly reference?",
- Identifier, ns.FullName);
+ ns.Error_NamespaceDoesNotExist (loc, Identifier);
return retval;
}
return DoResolve (ec, right_side);
}
- public override FullNamedExpression ResolveAsTypeStep (EmitContext ec, bool silent)
+ public override FullNamedExpression ResolveAsTypeStep (IResolveContext ec, bool silent)
{
return ResolveNamespaceOrType (ec, silent);
}
- public FullNamedExpression ResolveNamespaceOrType (EmitContext ec, bool silent)
+ public FullNamedExpression ResolveNamespaceOrType (IResolveContext rc, bool silent)
{
- FullNamedExpression new_expr = expr.ResolveAsTypeStep (ec, silent);
+ FullNamedExpression new_expr = expr.ResolveAsTypeStep (rc, silent);
if (new_expr == null)
return null;
if (new_expr is Namespace) {
Namespace ns = (Namespace) new_expr;
- FullNamedExpression retval = ns.Lookup (ec.DeclContainer, lookup_id, loc);
+ FullNamedExpression retval = ns.Lookup (rc.DeclContainer, lookup_id, loc);
if ((retval != null) && (args != null))
- retval = new ConstructedType (retval, args, loc).ResolveAsTypeStep (ec, false);
+ retval = new ConstructedType (retval, args, loc).ResolveAsTypeStep (rc, false);
if (!silent && retval == null)
- Report.Error (234, loc, "The type or namespace name `{0}' does not exist in the namespace `{1}'. Are you missing an assembly reference?",
- Identifier, ns.FullName);
+ ns.Error_NamespaceDoesNotExist (loc, Identifier);
return retval;
}
- TypeExpr tnew_expr = new_expr.ResolveAsTypeTerminal (ec, false);
+ TypeExpr tnew_expr = new_expr.ResolveAsTypeTerminal (rc, false);
if (tnew_expr == null)
return null;
- Type expr_type = tnew_expr.ResolveType (ec);
+ Type expr_type = tnew_expr.Type;
if (expr_type.IsPointer){
Error (23, "The `.' operator can not be applied to pointer operands (" +
}
Expression member_lookup = MemberLookup (
- ec.ContainerType, expr_type, expr_type, lookup_id,
+ rc.DeclContainer.TypeBuilder, expr_type, expr_type, lookup_id,
MemberTypes.NestedType, BindingFlags.Public | BindingFlags.NonPublic, loc);
if (member_lookup == null) {
int errors = Report.Errors;
- MemberLookupFailed (ec.ContainerType, expr_type, expr_type, lookup_id, null, false, loc);
+ MemberLookupFailed (rc.DeclContainer.TypeBuilder, expr_type, expr_type, lookup_id, null, false, loc);
if (!silent && errors == Report.Errors) {
Report.Error (426, loc, "The nested type `{0}' does not exist in the type `{1}'",
}
if (!(member_lookup is TypeExpr)) {
- new_expr.Error_UnexpectedKind (ec, "type", loc);
+ new_expr.Error_UnexpectedKind (rc.DeclContainer, "type", loc);
return null;
}
- TypeExpr texpr = member_lookup.ResolveAsTypeTerminal (ec, false);
+ TypeExpr texpr = member_lookup.ResolveAsTypeTerminal (rc, false);
if (texpr == null)
return null;
if (the_args != null) {
ConstructedType ctype = new ConstructedType (texpr.Type, the_args, loc);
- return ctype.ResolveAsTypeStep (ec, false);
+ return ctype.ResolveAsTypeStep (rc, false);
}
return texpr;
public override Expression DoResolve (EmitContext ec)
{
- bool last_check = ec.CheckState;
- bool last_const_check = ec.ConstantCheckState;
-
- ec.CheckState = true;
- ec.ConstantCheckState = true;
- Expr = Expr.Resolve (ec);
- ec.CheckState = last_check;
- ec.ConstantCheckState = last_const_check;
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, true))
+ Expr = Expr.Resolve (ec);
if (Expr == null)
return null;
public override void Emit (EmitContext ec)
{
- bool last_check = ec.CheckState;
- bool last_const_check = ec.ConstantCheckState;
-
- ec.CheckState = true;
- ec.ConstantCheckState = true;
- Expr.Emit (ec);
- ec.CheckState = last_check;
- ec.ConstantCheckState = last_const_check;
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, true))
+ Expr.Emit (ec);
+ }
+
+ public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ {
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, true))
+ Expr.EmitBranchable (ec, target, onTrue);
}
-
}
/// <summary>
public override Expression DoResolve (EmitContext ec)
{
- bool last_check = ec.CheckState;
- bool last_const_check = ec.ConstantCheckState;
-
- ec.CheckState = false;
- ec.ConstantCheckState = false;
- Expr = Expr.Resolve (ec);
- ec.CheckState = last_check;
- ec.ConstantCheckState = last_const_check;
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, false))
+ Expr = Expr.Resolve (ec);
if (Expr == null)
return null;
public override void Emit (EmitContext ec)
{
- bool last_check = ec.CheckState;
- bool last_const_check = ec.ConstantCheckState;
-
- ec.CheckState = false;
- ec.ConstantCheckState = false;
- Expr.Emit (ec);
- ec.CheckState = last_check;
- ec.ConstantCheckState = last_const_check;
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, false))
+ Expr.Emit (ec);
}
+ public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ {
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, false))
+ Expr.EmitBranchable (ec, target, onTrue);
+ }
}
/// <summary>
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, this.type);
+ temp = new LocalTemporary (this.type);
temp.Store (ec);
}
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, this.type);
+ temp = new LocalTemporary (this.type);
temp.Store (ec);
}
StoreFromPtr (ec.ig, t);
- if (temp != null)
+ if (temp != null) {
temp.Emit (ec);
+ temp.Release (ec);
+ }
return;
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, this.type);
+ temp = new LocalTemporary (this.type);
temp.Store (ec);
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, this.type);
+ temp = new LocalTemporary (this.type);
temp.Store (ec);
}
ig.Emit (OpCodes.Call, set);
}
- if (temp != null)
+ if (temp != null) {
temp.Emit (ec);
+ temp.Release (ec);
+ }
}
public void AddressOf (EmitContext ec, AddressOp mode)
BindingFlags.DeclaredOnly, p_name, null);
}
- static public Indexers GetIndexersForType (Type caller_type, Type lookup_type, Location loc)
+ static public Indexers GetIndexersForType (Type caller_type, Type lookup_type)
{
Indexers ix = empty;
public override Expression DoResolve (EmitContext ec)
{
- ArrayList AllGetters = new ArrayList();
if (!CommonResolve (ec))
return null;
//
// This is a group of properties, piles of them.
- bool found_any = false, found_any_getters = false;
- Type lookup_type = indexer_type;
+ ArrayList AllGetters = null;
- Indexers ilist = Indexers.GetIndexersForType (current_type, lookup_type, loc);
+ Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type);
if (ilist.Properties != null) {
- found_any = true;
+ AllGetters = new ArrayList(ilist.Properties.Count);
foreach (Indexers.Indexer ix in ilist.Properties) {
if (ix.Getter != null)
AllGetters.Add (ix.Getter);
}
}
- if (AllGetters.Count > 0) {
- found_any_getters = true;
- get = (MethodInfo) Invocation.OverloadResolve (
- ec, new MethodGroupExpr (AllGetters, loc),
- arguments, false, loc);
- }
-
- if (!found_any) {
+ if (AllGetters == null) {
Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `{0}'",
- TypeManager.CSharpName (indexer_type));
+ TypeManager.CSharpName (indexer_type));
return null;
}
- if (!found_any_getters) {
+ if (AllGetters.Count == 0) {
+ // FIXME: we cannot simply select first one as the error message is missleading when
+ // multiple indexers exist
+ Indexers.Indexer first_indexer = (Indexers.Indexer)ilist.Properties[ilist.Properties.Count - 1];
Report.Error (154, loc, "The property or indexer `{0}' cannot be used in this context because it lacks the `get' accessor",
- "XXXXXXXX");
+ TypeManager.GetFullNameSignature (first_indexer.PropertyInfo));
return null;
}
+ get = (MethodInfo)Invocation.OverloadResolve (ec, new MethodGroupExpr (AllGetters, loc),
+ arguments, false, loc);
+
if (get == null) {
Invocation.Error_WrongNumArguments (loc, "this", arguments.Count);
return null;
return null;
}
- instance_expr.CheckMarshallByRefAccess (ec.ContainerType);
+ instance_expr.CheckMarshalByRefAccess ();
eclass = ExprClass.IndexerAccess;
return this;
}
// if the indexer returns a value type, and we try to set a field in it
- if (right_side == EmptyExpression.LValueMemberAccess) {
+ if (right_side == EmptyExpression.LValueMemberAccess || right_side == EmptyExpression.LValueMemberOutAccess) {
Report.Error (1612, loc, "Cannot modify the return value of `{0}' because it is not a variable",
GetSignatureForError ());
return null;
bool found_any = false, found_any_setters = false;
- Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type, loc);
+ Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type);
if (ilist.Properties != null) {
found_any = true;
foreach (Indexers.Indexer ix in ilist.Properties) {
}
}
- instance_expr.CheckMarshallByRefAccess (ec.ContainerType);
+ instance_expr.CheckMarshalByRefAccess ();
eclass = ExprClass.IndexerAccess;
return this;
Invocation.EmitCall (ec, is_base_indexer, false, instance_expr, get, arguments, loc, prepared, false);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, Type);
+ temp = new LocalTemporary (Type);
temp.Store (ec);
}
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
- temp = new LocalTemporary (ec, Type);
+ temp = new LocalTemporary (Type);
temp.Store (ec);
}
} else if (leave_copy) {
- temp = new LocalTemporary (ec, Type);
+ temp = new LocalTemporary (Type);
source.Emit (ec);
temp.Store (ec);
a.Expr = temp;
Invocation.EmitCall (ec, is_base_indexer, false, instance_expr, set, set_arguments, loc, false, prepared);
- if (temp != null)
+ if (temp != null) {
temp.Emit (ec);
+ temp.Release (ec);
+ }
}
public static readonly EmptyExpression OutAccess = new EmptyExpression ();
public static readonly EmptyExpression LValueMemberAccess = new EmptyExpression ();
+ public static readonly EmptyExpression LValueMemberOutAccess = new EmptyExpression ();
static EmptyExpression temp = new EmptyExpression ();
public static EmptyExpression Grab ()
return this;
}
- protected override TypeExpr DoResolveAsTypeStep (EmitContext ec)
+ protected override TypeExpr DoResolveAsTypeStep (IResolveContext ec)
{
TypeExpr lexpr = left.ResolveAsTypeTerminal (ec, false);
if (lexpr == null)
return null;
- bool old = ec.TestObsoleteMethodUsage;
- ec.TestObsoleteMethodUsage = false;
- Type ltype = lexpr.ResolveType (ec);
- ec.TestObsoleteMethodUsage = old;
-
+ Type ltype = lexpr.Type;
if ((ltype == TypeManager.void_type) && (dim != "*")) {
- Report.Error (1547, Location,
- "Keyword 'void' cannot be used in this context");
+ Error_VoidInvalidInTheContext (loc);
return null;
}
throw new InternalErrorException ("Couldn't create computed type " + ltype + dim);
}
- if (!ec.InUnsafe && type.IsPointer){
+ if (type.IsPointer && !ec.IsInUnsafeScope){
UnsafeError (loc);
return null;
}
if (texpr == null)
return null;
- otype = texpr.ResolveType (ec);
+ otype = texpr.Type;
if (!TypeManager.VerifyUnManaged (otype, loc))
return null;
projects / mono.git / blobdiff