/// The `is_address' stuff is really just a hack. We need to come up with a better
/// way to handle it.
/// </remarks>
- public class LocalTemporary : Expression, IMemoryLocation {
+ public class LocalTemporary : Expression, IMemoryLocation, IAssignMethod {
LocalBuilder builder;
bool is_address;
builder = null;
}
- public override Expression CreateExpressionTree (EmitContext ec)
+ public override Expression CreateExpressionTree (ResolveContext ec)
{
- throw new NotSupportedException ("ET");
+ Arguments args = new Arguments (1);
+ args.Add (new Argument (this));
+ return CreateExpressionFactoryCall (ec, "Constant", args);
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
+ {
+ return this;
+ }
+
+ public override Expression DoResolveLValue (ResolveContext ec, Expression right_side)
{
return this;
}
LoadFromPtr (ig, type);
}
+ #region IAssignMethod Members
+
+ public void Emit (EmitContext ec, bool leave_copy)
+ {
+ Emit (ec);
+
+ if (leave_copy)
+ Emit (ec);
+ }
+
+ public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
+ {
+ if (prepare_for_load)
+ throw new NotImplementedException ();
+
+ source.Emit (ec);
+
+ Store (ec);
+
+ if (leave_copy)
+ Emit (ec);
+ }
+
+ #endregion
+
+ public LocalBuilder Builder {
+ get { return builder; }
+ }
+
// NB: if you have `is_address' on the stack there must
// be a managed pointer. Otherwise, it is the type from
// the ctor.
ig.Emit (OpCodes.Ldloca, builder);
}
+ public override void MutateHoistedGenericType (AnonymousMethodStorey storey)
+ {
+ type = storey.MutateType (type);
+ }
+
public bool PointsToAddress {
get {
return is_address;
/// The Assign node takes care of assigning the value of source into
/// the expression represented by target.
/// </summary>
- public class Assign : ExpressionStatement {
+ public abstract class Assign : ExpressionStatement {
protected Expression target, source;
protected Assign (Expression target, Expression source, Location loc)
this.loc = loc;
}
- public override Expression CreateExpressionTree (EmitContext ec)
+ public override Expression CreateExpressionTree (ResolveContext ec)
{
- Report.Error (832, loc, "An expression tree cannot contain an assignment operator");
+ ec.Report.Error (832, loc, "An expression tree cannot contain an assignment operator");
return null;
}
get { return source; }
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
{
bool ok = true;
source = source.Resolve (ec);
source = EmptyExpression.Null;
}
- target = target.ResolveLValue (ec, source, Location);
+ target = target.ResolveLValue (ec, source);
if (target == null || !ok)
return null;
type = target_type;
if (!(target is IAssignMethod)) {
- Error_ValueAssignment (loc);
+ Error_ValueAssignment (ec, loc);
return null;
}
- if ((source.eclass == ExprClass.Type) && (source is TypeExpr)) {
- source.Error_UnexpectedKind (ec.DeclContainer, "variable or value", loc);
- return null;
- } else if ((RootContext.Version == LanguageVersion.ISO_1) &&
+ if ((RootContext.Version == LanguageVersion.ISO_1) &&
(source is MethodGroupExpr)){
- ((MethodGroupExpr) source).ReportUsageError ();
+ ((MethodGroupExpr) source).ReportUsageError (ec);
return null;
}
- if (TypeManager.IsEqual (target_type, source_type)) {
- if (target.eclass == ExprClass.Variable) {
- New n = source as New;
- if (n == null)
- return this;
-
- if (n.HasInitializer) {
- n.SetTargetVariable (target);
- } else if (target_type.IsValueType) {
- n.SetTargetVariable (target);
- return n;
- }
- }
+ if (!TypeManager.IsEqual (target_type, source_type)) {
+ Expression resolved = ResolveConversions (ec);
- return this;
+ if (resolved != this)
+ return resolved;
}
- return ResolveConversions (ec);
+ return this;
}
- protected virtual Expression ResolveConversions (EmitContext ec)
+#if NET_4_0
+ public override System.Linq.Expressions.Expression MakeExpression (BuilderContext ctx)
+ {
+ var tassign = target as IDynamicAssign;
+ if (tassign == null)
+ throw new InternalErrorException (target.GetType () + " does not support dynamic assignment");
+
+ var target_object = tassign.MakeAssignExpression (ctx);
+
+ //
+ // Some hacking is needed as DLR does not support void type and requires
+ // always have object convertible return type to support caching and chaining
+ //
+ // We do this by introducing an explicit block which returns RHS value when
+ // available or null
+ //
+ if (target_object.NodeType == System.Linq.Expressions.ExpressionType.Block)
+ return target_object;
+
+ var source_object = System.Linq.Expressions.Expression.Convert (source.MakeExpression (ctx), target_object.Type);
+ return System.Linq.Expressions.Expression.Assign (target_object, source_object);
+ }
+#endif
+
+ public override void MutateHoistedGenericType (AnonymousMethodStorey storey)
+ {
+ source.MutateHoistedGenericType (storey);
+ target.MutateHoistedGenericType (storey);
+ type = storey.MutateType (type);
+ }
+
+ protected virtual Expression ResolveConversions (ResolveContext ec)
{
source = Convert.ImplicitConversionRequired (ec, source, target.Type, loc);
if (source == null)
void Emit (EmitContext ec, bool is_statement)
{
- ((IAssignMethod) target).EmitAssign (ec, source, !is_statement, this is CompoundAssign);
+ IAssignMethod t = (IAssignMethod) target;
+ t.EmitAssign (ec, source, !is_statement, this is CompoundAssign);
}
public override void Emit (EmitContext ec)
}
}
- class SimpleAssign : Assign {
+ public class SimpleAssign : Assign {
public SimpleAssign (Expression target, Expression source)
: this (target, source, target.Location)
{
return t.Equals (source);
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
{
Expression e = base.DoResolve (ec);
if (e == null || e != this)
return e;
if (CheckEqualAssign (target))
- Report.Warning (1717, 3, loc, "Assignment made to same variable; did you mean to assign something else?");
+ ec.Report.Warning (1717, 3, loc, "Assignment made to same variable; did you mean to assign something else?");
return this;
}
// Keep resolved value because field initializers have their own rules
//
ExpressionStatement resolved;
+ IMemberContext rc;
- public FieldInitializer (FieldBuilder field, Expression expression)
- : base (new FieldExpr (field, expression.Location, true), expression, expression.Location)
+ public FieldInitializer (FieldBuilder field, Expression expression, IMemberContext rc)
+ : base (new FieldExpr (field, expression.Location), expression, expression.Location)
{
+ this.rc = rc;
if (!field.IsStatic)
((FieldExpr)target).InstanceExpression = CompilerGeneratedThis.Instance;
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
{
// Field initializer can be resolved (fail) many times
if (source == null)
return null;
- if (resolved == null)
- resolved = base.DoResolve (ec) as ExpressionStatement;
+ if (resolved == null) {
+ //
+ // Field initializers are tricky for partial classes. They have to
+ // share same constructor (block) but they have they own resolve scope.
+ //
+
+ IMemberContext old = ec.MemberContext;
+ ec.MemberContext = rc;
+
+ using (ec.Set (ResolveContext.Options.FieldInitializerScope)) {
+ resolved = base.DoResolve (ec) as ExpressionStatement;
+ }
+
+ ec.MemberContext = old;
+ }
return resolved;
}
this.loc = loc;
}
- public override Expression CreateExpressionTree (EmitContext ec)
+ public override Expression CreateExpressionTree (ResolveContext ec)
{
return new SimpleAssign (target, source).CreateExpressionTree (ec);
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
{
- eclass = ExprClass.Value;
- type = target.Type;
+ if (op != Binary.Operator.Addition && op != Binary.Operator.Subtraction)
+ target.Error_AssignmentEventOnly (ec);
source = source.Resolve (ec);
if (source == null)
return null;
- Type stype = source.Type;
- if (source.eclass == ExprClass.MethodGroup || stype == TypeManager.anonymous_method_type) {
- if (RootContext.Version != LanguageVersion.ISO_1) {
- source = Convert.ImplicitConversionRequired (ec, source, type, loc);
- if (source == null)
- return null;
- stype = source.Type;
- }
- } else if (!TypeManager.Equals (type, stype) && !(source is NullLiteral))
+ source = Convert.ImplicitConversionRequired (ec, source, target.Type, loc);
+ if (source == null)
return null;
+ eclass = ExprClass.Value;
+ type = TypeManager.void_type;
return this;
}
public override void Emit (EmitContext ec)
{
- throw new InternalErrorException ("don't know what to emit");
+ if (RootContext.EvalMode)
+ EmitStatement (ec);
+ else
+ throw new InternalErrorException ("don't know what to emit");
}
public override void EmitStatement (EmitContext ec)
//
// This class is used for compound assignments.
//
- class CompoundAssign : Assign {
- Binary.Operator op;
- Expression original_source;
-
- public CompoundAssign (Binary.Operator op, Expression target, Expression source)
- : base (target, source, target.Location)
+ public class CompoundAssign : Assign
+ {
+ // This is just a hack implemented for arrays only
+ public sealed class TargetExpression : Expression
{
- original_source = source;
- this.op = op;
- }
-
- // !!! What a stupid name
- public class Helper : Expression {
Expression child;
- public Helper (Expression child)
+ public TargetExpression (Expression child)
{
this.child = child;
this.loc = child.Location;
}
- public override Expression CreateExpressionTree (EmitContext ec)
+ public override Expression CreateExpressionTree (ResolveContext ec)
{
throw new NotSupportedException ("ET");
}
- public override Expression DoResolve (EmitContext ec)
+ public override Expression DoResolve (ResolveContext ec)
{
- child = child.Resolve (ec);
- if (child == null)
- return null;
type = child.Type;
eclass = ExprClass.Value;
return this;
}
}
- public override Expression DoResolve (EmitContext ec)
+ // Used for underlying binary operator
+ readonly Binary.Operator op;
+ Expression right;
+ Expression left;
+
+ public CompoundAssign (Binary.Operator op, Expression target, Expression source)
+ : base (target, source, target.Location)
+ {
+ right = source;
+ this.op = op;
+ }
+
+ public CompoundAssign (Binary.Operator op, Expression target, Expression source, Expression left)
+ : this (op, target, source)
+ {
+ this.left = left;
+ }
+
+ public override Expression DoResolve (ResolveContext ec)
{
- original_source = original_source.Resolve (ec);
- if (original_source == null)
+ right = right.Resolve (ec);
+ if (right == null)
return null;
- using (ec.Set (EmitContext.Flags.InCompoundAssignment)) {
+ MemberAccess ma = target as MemberAccess;
+ using (ec.Set (ResolveContext.Options.CompoundAssignmentScope)) {
target = target.Resolve (ec);
}
return null;
if (target is MethodGroupExpr){
- Error_CannotAssign (((MethodGroupExpr)target).Name, target.ExprClassName);
+ ec.Report.Error (1656, loc,
+ "Cannot assign to `{0}' because it is a `{1}'",
+ ((MethodGroupExpr)target).Name, target.ExprClassName);
return null;
}
if (target is EventExpr)
- return new EventAddOrRemove (target, op, original_source, loc).DoResolve (ec);
+ return new EventAddOrRemove (target, op, right, loc).DoResolve (ec);
//
// Only now we can decouple the original source/target
// into a tree, to guarantee that we do not have side
// effects.
//
- source = new Binary (op, new Helper (target), original_source, true);
+ if (left == null)
+ left = new TargetExpression (target);
+
+ source = new Binary (op, left, right, true);
+
+ // TODO: TargetExpression breaks MemberAccess composition
+ if (target is DynamicMemberBinder) {
+ Arguments targs = ((DynamicMemberBinder) target).Arguments;
+ source = source.Resolve (ec);
+
+ Arguments args = new Arguments (2);
+ args.AddRange (targs);
+ args.Add (new Argument (source));
+ source = new DynamicMemberBinder (true, ma.Name, args, loc).Resolve (ec);
+
+ // Handles possible event addition/subtraction
+ if (op == Binary.Operator.Addition || op == Binary.Operator.Subtraction) {
+ args = new Arguments (2);
+ args.AddRange (targs);
+ args.Add (new Argument (right));
+ string method_prefix = op == Binary.Operator.Addition ?
+ Event.AEventAccessor.AddPrefix : Event.AEventAccessor.RemovePrefix;
+
+ Expression invoke = new DynamicInvocation (
+ new MemberAccess (right, method_prefix + ma.Name, loc), args, loc).Resolve (ec);
+
+ args = new Arguments (1);
+ args.AddRange (targs);
+ source = new DynamicEventCompoundAssign (ma.Name, args,
+ (ExpressionStatement) source, (ExpressionStatement) invoke, loc).Resolve (ec);
+ }
+
+ return source;
+ }
+
return base.DoResolve (ec);
}
- protected override Expression ResolveConversions (EmitContext ec)
+ protected override Expression ResolveConversions (ResolveContext ec)
{
- // source might have changed to BinaryDelegate
Type target_type = target.Type;
- Type source_type = source.Type;
- Binary b = source as Binary;
- if (b == null)
- return base.ResolveConversions (ec);
-
- // FIXME: Restrict only to predefined operators
//
- // 1. if the source is explicitly convertible to the
- // target_type
+ // 1. the return type is implicitly convertible to the type of target
//
- source = Convert.ExplicitConversion (ec, source, target_type, loc);
- if (source == null){
- original_source.Error_ValueCannotBeConverted (ec, loc, target_type, true);
- return null;
- }
-
- //
- // 2. and the original right side is implicitly convertible to
- // the type of target
- //
- if (Convert.ImplicitConversionExists (ec, original_source, target_type))
+ if (Convert.ImplicitConversionExists (ec, source, target_type)) {
+ source = Convert.ImplicitConversion (ec, source, target_type, loc);
return this;
+ }
//
- // In the spec 2.4 they added: or if type of the target is int
- // and the operator is a shift operator...
+ // Otherwise, if the selected operator is a predefined operator
//
- if (source_type == TypeManager.int32_type && (b.Oper & Binary.Operator.ShiftMask) != 0)
- return this;
+ Binary b = source as Binary;
+ if (b != null) {
+ //
+ // 2a. the operator is a shift operator
+ //
+ // 2b. the return type is explicitly convertible to the type of x, and
+ // y is implicitly convertible to the type of x
+ //
+ if ((b.Oper & Binary.Operator.ShiftMask) != 0 ||
+ Convert.ImplicitConversionExists (ec, right, target_type)) {
+ source = Convert.ExplicitConversion (ec, source, target_type, loc);
+ return this;
+ }
+ }
- original_source.Error_ValueCannotBeConverted (ec, loc, target_type, false);
+ right.Error_ValueCannotBeConverted (ec, loc, target_type, false);
return null;
}
protected override void CloneTo (CloneContext clonectx, Expression t)
{
- CompoundAssign target = (CompoundAssign) t;
+ CompoundAssign ctarget = (CompoundAssign) t;
- target.original_source = original_source.Clone (clonectx);
+ ctarget.right = ctarget.source = source.Clone (clonectx);
+ ctarget.target = target.Clone (clonectx);
}
}
}
projects / mono.git / blobdiff