TypeExpr class_constraint;
ArrayList iface_constraints;
ArrayList type_param_constraints;
- int num_constraints, first_constraint;
+ int num_constraints;
Type class_constraint_type;
Type[] iface_constraint_types;
Type effective_base_type;
continue;
}
+ int errors = Report.Errors;
+ FullNamedExpression fn = ((Expression) obj).ResolveAsTypeStep (ec);
+
+ if (fn == null) {
+ if (errors != Report.Errors)
+ return false;
+
+ Report.Error (246, loc, "Cannot find type '{0}'", obj);
+ return false;
+ }
+
TypeExpr expr;
- if (obj is ConstructedType) {
- ConstructedType cexpr = (ConstructedType) obj;
+ ConstructedType cexpr = fn as ConstructedType;
+ if (cexpr != null) {
if (!cexpr.ResolveConstructedType (ec))
return false;
+
expr = cexpr;
} else
- expr = ((Expression) obj).ResolveAsTypeTerminal (ec);
+ expr = fn.ResolveAsTypeTerminal (ec);
if (expr == null)
return false;
return false;
}
- list.Add (iface_constraint.Type);
+ TypeExpr te = iface_constraint.ResolveAsTypeTerminal (ec);
+ if (te == null)
+ return false;
+
+ list.Add (te.Type);
}
foreach (TypeParameterExpr expr in type_param_constraints) {
list.Add (expr.Type);
}
- iface_constraint_types = new Type [list.Count];
- list.CopyTo (iface_constraint_types, 0);
+ ArrayList new_list = new ArrayList ();
+ foreach (Type iface in list) {
+ if (new_list.Contains (iface))
+ continue;
+
+ new_list.Add (iface);
+
+ Type [] implementing = TypeManager.GetInterfaces (iface);
+
+ foreach (Type imp in implementing) {
+ if (!new_list.Contains (imp))
+ new_list.Add (imp);
+ }
+ }
+
+ iface_constraint_types = new Type [new_list.Count];
+ new_list.CopyTo (iface_constraint_types, 0);
if (class_constraint != null) {
- class_constraint_type = class_constraint.Type;
+ TypeExpr te = class_constraint.ResolveAsTypeTerminal (ec);
+ if (te == null)
+ return false;
+
+ class_constraint_type = te.Type;
if (class_constraint_type == null)
return false;
mb = mb.GetGenericMethodDefinition ();
int pos = type.GenericParameterPosition;
- ParameterData pd = Invocation.GetParameterData (mb);
+ ParameterData pd = TypeManager.GetParameterData (mb);
GenericConstraints temp_gc = pd.GenericConstraints (pos);
Type mparam = mb.GetGenericArguments () [pos];
return true;
}
+ public bool UpdateConstraints (EmitContext ec, Constraints new_constraints)
+ {
+ //
+ // We're used in partial generic type definitions.
+ // If `check' is false, we just encountered the first ClassPart which has
+ // constraints - they become our "real" constraints.
+ // Otherwise we're called after the type parameters have already been defined
+ // and check whether the constraints are the same in all parts.
+ //
+ if (type == null)
+ throw new InvalidOperationException ();
+
+ if (constraints == null) {
+ new_constraints = constraints;
+ return true;
+ } else if (new_constraints == null)
+ return true;
+
+ if (!new_constraints.Resolve (ec))
+ return false;
+ if (!new_constraints.ResolveTypes (ec))
+ return false;
+
+ return constraints.CheckInterfaceMethod (ec, new_constraints);
+ }
+
public override string DocCommentHeader {
get {
throw new InvalidOperationException (
Type class_constraint;
Type[] iface_constraints;
Type[] dargs;
- Type declaring;
public InflatedConstraints (GenericConstraints gc, Type declaring)
{
this.gc = gc;
- this.declaring = declaring;
dargs = TypeManager.GetTypeArguments (declaring);
}
public class ConstructedType : TypeExpr {
- string name, full_name;
+ string full_name;
+ FullNamedExpression name;
TypeArguments args;
Type[] gen_params, atypes;
Type gt;
- public ConstructedType (string name, TypeArguments args, Location l)
- {
- loc = l;
- this.name = MemberName.MakeName (name, args.Count);
- this.args = args;
-
- eclass = ExprClass.Type;
- full_name = name + "<" + args.ToString () + ">";
- }
-
- public ConstructedType (string name, TypeParameter[] type_params, Location l)
- : this (type_params, l)
- {
- loc = l;
-
- this.name = name;
- full_name = name + "<" + args.ToString () + ">";
- }
-
public ConstructedType (FullNamedExpression fname, TypeArguments args, Location l)
{
loc = l;
- this.name = fname.FullName;
+ this.name = fname;
this.args = args;
eclass = ExprClass.Type;
{
gt = t.GetGenericTypeDefinition ();
- this.name = gt.FullName;
+ this.name = new TypeExpression (gt, l);
full_name = gt.FullName + "<" + args.ToString () + ">";
}
{
gt = t.GetGenericTypeDefinition ();
- this.name = gt.FullName;
+ this.name = new TypeExpression (gt, l);
full_name = gt.FullName + "<" + args.ToString () + ">";
}
}
TypeExpr ct = new ConstructedType (ctype, new_args, loc);
- if (ct.ResolveAsTypeTerminal (ec) == null)
+ if (ct.ResolveAsTypeStep (ec) == null)
return false;
ctype = ct.Type;
}
return true;
}
- public override TypeExpr ResolveAsTypeTerminal (EmitContext ec)
- {
- if (base.ResolveAsTypeTerminal (ec) == null)
- return null;
-
- if (!CheckConstraints (ec))
- return null;
-
- return this;
- }
-
public bool ResolveConstructedType (EmitContext ec)
{
if (type != null)
if (gt != null)
return DoResolveType (ec);
- //
- // First, resolve the generic type.
- //
- DeclSpace ds;
- Type nested = ec.DeclSpace.FindNestedType (loc, name, out ds);
- if (nested != null) {
- gt = nested.GetGenericTypeDefinition ();
-
- TypeArguments new_args = new TypeArguments (loc);
- if (ds.IsGeneric) {
- foreach (TypeParameter param in ds.TypeParameters)
- new_args.Add (new TypeParameterExpr (param, loc));
- }
- new_args.Add (args);
-
- args = new_args;
- return DoResolveType (ec);
- }
-
- Type t;
int num_args;
+ Type t = name.Type;
- SimpleName sn = new SimpleName (name, loc);
- TypeExpr resolved = sn.ResolveAsTypeTerminal (ec);
- if (resolved == null)
- return false;
-
- t = resolved.Type;
if (t == null) {
- Report.Error (246, loc, "Cannot find type `{0}'<...>",
- Basename);
+ Report.Error (246, loc, "Cannot find type `{0}'<...>", Name);
return false;
}
public Expression GetSimpleName (EmitContext ec)
{
- return new SimpleName (Basename, args, loc);
+ return this;
}
public override bool CheckAccessLevel (DeclSpace ds)
get { return gt.IsSealed; }
}
- public override bool IsAttribute {
- get { return false; }
- }
-
public override bool Equals (object obj)
{
ConstructedType cobj = obj as ConstructedType;
return base.GetHashCode ();
}
- public string Basename {
- get {
- int pos = name.LastIndexOf ('`');
- if (pos >= 0)
- return name.Substring (0, pos);
- else
- return name;
- }
- }
-
public override string Name {
get {
return full_name;
public override bool Define ()
{
+ ec = new EmitContext (this, this, Location, null, null, ModFlags, false);
+
for (int i = 0; i < TypeParameters.Length; i++)
- if (!TypeParameters [i].Resolve (Parent))
+ if (!TypeParameters [i].Resolve (this))
return false;
return true;
}
- public bool Define (MethodBuilder mb, Type return_type)
+ public bool Define (MethodBuilder mb)
{
- if (!Define ())
- return false;
-
GenericTypeParameterBuilder[] gen_params;
string[] names = MemberName.TypeArguments.GetDeclarations ();
gen_params = mb.DefineGenericParameters (names);
for (int i = 0; i < TypeParameters.Length; i++)
TypeParameters [i].Define (gen_params [i]);
- ec = new EmitContext (
- this, this, Location, null, return_type, ModFlags, false);
+ if (!Define ())
+ return false;
for (int i = 0; i < TypeParameters.Length; i++) {
if (!TypeParameters [i].ResolveType (ec))
public class DefaultValueExpression : Expression
{
Expression expr;
- LocalTemporary temp_storage;
public DefaultValueExpression (Expression expr, Location loc)
{
return null;
type = texpr.Type;
- if (type.IsGenericParameter || TypeManager.IsValueType (type))
- temp_storage = new LocalTemporary (ec, type);
eclass = ExprClass.Variable;
return this;
public override void Emit (EmitContext ec)
{
- if (temp_storage != null) {
+ if (type.IsGenericParameter || TypeManager.IsValueType (type)) {
+ LocalTemporary temp_storage = new LocalTemporary (ec, type);
+
temp_storage.AddressOf (ec, AddressOp.LoadStore);
ec.ig.Emit (OpCodes.Initobj, type);
temp_storage.Emit (ec);
eclass = ExprClass.Type;
}
+ public NullableType (Type type, Location loc)
+ : this (new TypeExpression (type, loc), loc)
+ { }
+
public override string Name {
get { return underlying.ToString () + "?"; }
}
return (TypeParameter) builder_to_type_param [t];
}
- public static bool HasConstructorConstraint (Type t)
- {
- GenericConstraints gc = GetTypeParameterConstraints (t);
- if (gc == null)
- return false;
-
- return (gc.Attributes & GenericParameterAttributes.DefaultConstructorConstraint) != 0;
- }
-
public static GenericConstraints GetTypeParameterConstraints (Type t)
{
if (!t.IsGenericParameter)
return t.GetGenericArguments ();
}
+ //
+ // Whether `array' is an array of T and `enumerator' is `IEnumerable<T>'.
+ // For instance "string[]" -> "IEnumerable<string>".
+ //
+ public static bool IsIEnumerable (Type array, Type enumerator)
+ {
+ if (!array.IsArray || !enumerator.IsGenericInstance)
+ return false;
+
+ if (enumerator.GetGenericTypeDefinition () != generic_ienumerable_type)
+ return false;
+
+ Type[] args = GetTypeArguments (enumerator);
+ return args [0] == GetElementType (array);
+ }
+
public static bool IsEqual (Type a, Type b)
{
if (a.Equals (b))
ArrayList list = new ArrayList ();
if (at.IsGenericInstance)
list.Add (at);
- else {
- for (Type bt = at.BaseType; bt != null; bt = bt.BaseType)
- list.Add (bt);
+ for (Type bt = at.BaseType; bt != null; bt = bt.BaseType)
+ list.Add (bt);
- list.AddRange (TypeManager.GetInterfaces (at));
- }
+ list.AddRange (TypeManager.GetInterfaces (at));
bool found_one = false;
else
arg_count = arguments.Count;
- ParameterData pd = Invocation.GetParameterData (method);
+ ParameterData pd = TypeManager.GetParameterData (method);
int pd_count = pd.Count;
else
arg_count = 0;
- ParameterData pd = Invocation.GetParameterData (method);
+ ParameterData pd = TypeManager.GetParameterData (method);
if (arg_count != pd.Count)
return false;
param_types [i] = pd.ParameterType (i);
Argument a = (Argument) arguments [i];
- if ((a.Expr is NullLiteral) || (a.Expr is MethodGroupExpr))
+ if ((a.Expr is NullLiteral) || (a.Expr is MethodGroupExpr) ||
+ (a.Expr is AnonymousMethod))
continue;
arg_types [i] = a.Type;
if (!TypeManager.IsGenericMethod (method))
return true;
- ParameterData pd = Invocation.GetParameterData (method);
+ ParameterData pd = TypeManager.GetParameterData (method);
if (apd.Count != pd.Count)
return false;
}
}
- public class NullCoalescingOperator : Expression
- {
- Expression left;
- Expression right;
-
- public NullCoalescingOperator (Expression left, Expression right, Location loc)
- {
- this.left = left;
- this.right = right;
- this.loc = loc;
- }
-
- public override Expression DoResolve (EmitContext ec)
- {
- Error (-1, "The ?? operator is not yet implemented.");
- return null;
- }
-
- public override void Emit (EmitContext ec)
- {
- }
- }
-
public abstract class Nullable
{
protected sealed class NullableInfo
}
}
- public class NullLiteral : Expression, IMemoryLocation {
- public NullLiteral (Type target_type, Location loc)
+ protected class Unwrap : Expression, IMemoryLocation, IAssignMethod
+ {
+ Expression expr;
+ NullableInfo info;
+
+ LocalTemporary temp;
+ bool has_temp;
+
+ public Unwrap (Expression expr, Location loc)
+ {
+ this.expr = expr;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ expr = expr.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ if (!(expr is IMemoryLocation))
+ temp = new LocalTemporary (ec, expr.Type);
+
+ info = new NullableInfo (expr.Type);
+ type = info.UnderlyingType;
+ eclass = expr.eclass;
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ AddressOf (ec, AddressOp.LoadStore);
+ ec.ig.EmitCall (OpCodes.Call, info.Value, null);
+ }
+
+ public void EmitCheck (EmitContext ec)
+ {
+ AddressOf (ec, AddressOp.LoadStore);
+ ec.ig.EmitCall (OpCodes.Call, info.HasValue, null);
+ }
+
+ void create_temp (EmitContext ec)
+ {
+ if ((temp != null) && !has_temp) {
+ expr.Emit (ec);
+ temp.Store (ec);
+ has_temp = true;
+ }
+ }
+
+ public void AddressOf (EmitContext ec, AddressOp mode)
+ {
+ create_temp (ec);
+ if (temp != null)
+ temp.AddressOf (ec, AddressOp.LoadStore);
+ else
+ ((IMemoryLocation) expr).AddressOf (ec, AddressOp.LoadStore);
+ }
+
+ public void Emit (EmitContext ec, bool leave_copy)
+ {
+ create_temp (ec);
+ if (leave_copy) {
+ if (temp != null)
+ temp.Emit (ec);
+ else
+ expr.Emit (ec);
+ }
+
+ Emit (ec);
+ }
+
+ public void EmitAssign (EmitContext ec, Expression source,
+ bool leave_copy, bool prepare_for_load)
+ {
+ source.Emit (ec);
+ ec.ig.Emit (OpCodes.Newobj, info.Constructor);
+
+ if (leave_copy)
+ ec.ig.Emit (OpCodes.Dup);
+
+ Expression empty = new EmptyExpression (expr.Type);
+ ((IAssignMethod) expr).EmitAssign (ec, empty, false, prepare_for_load);
+ }
+ }
+
+ protected class Wrap : Expression
+ {
+ Expression expr;
+ NullableInfo info;
+
+ public Wrap (Expression expr, Location loc)
+ {
+ this.expr = expr;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ expr = expr.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ TypeExpr target_type = new NullableType (expr.Type, loc);
+ target_type = target_type.ResolveAsTypeTerminal (ec);
+ if (target_type == null)
+ return null;
+
+ type = target_type.Type;
+ info = new NullableInfo (type);
+ eclass = ExprClass.Value;
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ expr.Emit (ec);
+ ec.ig.Emit (OpCodes.Newobj, info.Constructor);
+ }
+ }
+
+ public class NullableLiteral : Expression, IMemoryLocation {
+ public NullableLiteral (Type target_type, Location loc)
{
this.type = target_type;
this.loc = loc;
}
}
- public class LiftedConversion : Expression
+ public abstract class Lifted : Expression, IMemoryLocation
{
- Expression source;
- NullableInfo source_info, target_info;
- Expression conversion;
+ Expression expr, underlying, wrap, null_value;
+ Unwrap unwrap;
- protected LiftedConversion (Expression source, Type target_type,
- NullableInfo source_info, NullableInfo target_info,
- Expression conversion, Location loc)
+ protected Lifted (Expression expr, Location loc)
{
- this.source = source;
- this.type = target_type;
- this.source_info = source_info;
- this.target_info = target_info;
- this.conversion = conversion;
+ this.expr = expr;
this.loc = loc;
-
- eclass = source.eclass;
}
- public static Expression Create (EmitContext ec, Expression source, Type target_type,
- bool is_user, bool is_explicit, Location loc)
+ public override Expression DoResolve (EmitContext ec)
{
- NullableInfo source_info = new NullableInfo (source.Type);
- NullableInfo target_info = new NullableInfo (target_type);
+ expr = expr.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ unwrap = (Unwrap) new Unwrap (expr, loc).Resolve (ec);
+ if (unwrap == null)
+ return null;
+
+ underlying = ResolveUnderlying (unwrap, ec);
+ if (underlying == null)
+ return null;
- source = source.Resolve (ec);
- if (source == null)
+ wrap = new Wrap (underlying, loc).Resolve (ec);
+ if (wrap == null)
return null;
- Expression conversion;
- if (is_user) {
- conversion = Convert.UserDefinedConversion (
- ec, new EmptyExpression (source_info.UnderlyingType),
- target_info.UnderlyingType, loc, is_explicit);
+ null_value = new NullableLiteral (wrap.Type, loc).Resolve (ec);
+ if (null_value == null)
+ return null;
+
+ type = wrap.Type;
+ eclass = ExprClass.Value;
+ return this;
+ }
+
+ protected abstract Expression ResolveUnderlying (Expression unwrap, EmitContext ec);
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+ Label is_null_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+
+ wrap.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (is_null_label);
+ null_value.Emit (ec);
+
+ ig.MarkLabel (end_label);
+ }
+
+ public void AddressOf (EmitContext ec, AddressOp mode)
+ {
+ unwrap.AddressOf (ec, mode);
+ }
+ }
+
+ public class LiftedConversion : Lifted
+ {
+ public readonly bool IsUser;
+ public readonly bool IsExplicit;
+ public readonly Type TargetType;
+
+ public LiftedConversion (Expression expr, Type target_type, bool is_user,
+ bool is_explicit, Location loc)
+ : base (expr, loc)
+ {
+ this.IsUser = is_user;
+ this.IsExplicit = is_explicit;
+ this.TargetType = target_type;
+ }
+
+ protected override Expression ResolveUnderlying (Expression unwrap, EmitContext ec)
+ {
+ Type type = TypeManager.GetTypeArguments (TargetType) [0];
+
+ if (IsUser) {
+ return Convert.UserDefinedConversion (ec, unwrap, type, loc, IsExplicit);
} else {
- if (is_explicit)
- conversion = Convert.ExplicitConversion (
- ec, new EmptyExpression (source_info.UnderlyingType),
- target_info.UnderlyingType, loc);
+ if (IsExplicit)
+ return Convert.ExplicitConversion (ec, unwrap, type, loc);
else
- conversion = Convert.ImplicitConversion (
- ec, new EmptyExpression (source_info.UnderlyingType),
- target_info.UnderlyingType, loc);
+ return Convert.ImplicitConversion (ec, unwrap, type, loc);
}
+ }
+ }
- if (conversion == null)
- return null;
+ public class LiftedUnaryOperator : Lifted
+ {
+ public readonly Unary.Operator Oper;
- return new LiftedConversion (
- source, target_type, source_info, target_info, conversion, loc);
+ public LiftedUnaryOperator (Unary.Operator op, Expression expr, Location loc)
+ : base (expr, loc)
+ {
+ this.Oper = op;
+ }
+
+ protected override Expression ResolveUnderlying (Expression unwrap, EmitContext ec)
+ {
+ return new Unary (Oper, unwrap, loc);
+ }
+ }
+
+ public class LiftedConditional : Lifted
+ {
+ Expression true_expr, false_expr;
+
+ public LiftedConditional (Expression expr, Expression true_expr, Expression false_expr,
+ Location loc)
+ : base (expr, loc)
+ {
+ this.true_expr = true_expr;
+ this.false_expr = false_expr;
+ }
+
+ protected override Expression ResolveUnderlying (Expression unwrap, EmitContext ec)
+ {
+ return new Conditional (unwrap, true_expr, false_expr, loc);
+ }
+ }
+
+ public class LiftedBinaryOperator : Expression
+ {
+ public readonly Binary.Operator Oper;
+
+ Expression left, right, underlying, null_value, bool_wrap;
+ Unwrap left_unwrap, right_unwrap;
+ bool is_equality, is_comparision, is_boolean;
+
+ public LiftedBinaryOperator (Binary.Operator op, Expression left, Expression right,
+ Location loc)
+ {
+ this.Oper = op;
+ this.left = left;
+ this.right = right;
+ this.loc = loc;
}
public override Expression DoResolve (EmitContext ec)
{
+ if (TypeManager.IsNullableType (left.Type)) {
+ left_unwrap = new Unwrap (left, loc);
+ left = left_unwrap.Resolve (ec);
+ if (left == null)
+ return null;
+ }
+
+ if (TypeManager.IsNullableType (right.Type)) {
+ right_unwrap = new Unwrap (right, loc);
+ right = right_unwrap.Resolve (ec);
+ if (right == null)
+ return null;
+ }
+
+ if (((Oper == Binary.Operator.BitwiseAnd) || (Oper == Binary.Operator.BitwiseOr) ||
+ (Oper == Binary.Operator.LogicalAnd) || (Oper == Binary.Operator.LogicalOr)) &&
+ ((left.Type == TypeManager.bool_type) && (right.Type == TypeManager.bool_type))) {
+ Expression empty = new EmptyExpression (TypeManager.bool_type);
+ bool_wrap = new Wrap (empty, loc).Resolve (ec);
+ null_value = new NullableLiteral (bool_wrap.Type, loc).Resolve (ec);
+
+ type = bool_wrap.Type;
+ is_boolean = true;
+ } else if ((Oper == Binary.Operator.Equality) || (Oper == Binary.Operator.Inequality)) {
+ if (!(left is NullLiteral) && !(right is NullLiteral)) {
+ underlying = new Binary (Oper, left, right, loc).Resolve (ec);
+ if (underlying == null)
+ return null;
+ }
+
+ type = TypeManager.bool_type;
+ is_equality = true;
+ } else if ((Oper == Binary.Operator.LessThan) ||
+ (Oper == Binary.Operator.GreaterThan) ||
+ (Oper == Binary.Operator.LessThanOrEqual) ||
+ (Oper == Binary.Operator.GreaterThanOrEqual)) {
+ underlying = new Binary (Oper, left, right, loc).Resolve (ec);
+ if (underlying == null)
+ return null;
+
+ type = TypeManager.bool_type;
+ is_comparision = true;
+ } else {
+ underlying = new Binary (Oper, left, right, loc).Resolve (ec);
+ if (underlying == null)
+ return null;
+
+ underlying = new Wrap (underlying, loc).Resolve (ec);
+ if (underlying == null)
+ return null;
+
+ type = underlying.Type;
+ null_value = new NullableLiteral (type, loc).Resolve (ec);
+ }
+
+ eclass = ExprClass.Value;
return this;
}
+ void EmitBoolean (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ Label left_is_null_label = ig.DefineLabel ();
+ Label right_is_null_label = ig.DefineLabel ();
+ Label is_null_label = ig.DefineLabel ();
+ Label wrap_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ if (left_unwrap != null) {
+ left_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, left_is_null_label);
+ }
+
+ left.Emit (ec);
+ ig.Emit (OpCodes.Dup);
+ if ((Oper == Binary.Operator.BitwiseOr) || (Oper == Binary.Operator.LogicalOr))
+ ig.Emit (OpCodes.Brtrue, wrap_label);
+ else
+ ig.Emit (OpCodes.Brfalse, wrap_label);
+
+ if (right_unwrap != null) {
+ right_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, right_is_null_label);
+ }
+
+ if ((Oper == Binary.Operator.LogicalAnd) || (Oper == Binary.Operator.LogicalOr))
+ ig.Emit (OpCodes.Pop);
+
+ right.Emit (ec);
+ if (Oper == Binary.Operator.BitwiseOr)
+ ig.Emit (OpCodes.Or);
+ else if (Oper == Binary.Operator.BitwiseAnd)
+ ig.Emit (OpCodes.And);
+ ig.Emit (OpCodes.Br, wrap_label);
+
+ ig.MarkLabel (left_is_null_label);
+ if (right_unwrap != null) {
+ right_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+ }
+
+ right.Emit (ec);
+ ig.Emit (OpCodes.Dup);
+ if ((Oper == Binary.Operator.BitwiseOr) || (Oper == Binary.Operator.LogicalOr))
+ ig.Emit (OpCodes.Brtrue, wrap_label);
+ else
+ ig.Emit (OpCodes.Brfalse, wrap_label);
+
+ ig.MarkLabel (right_is_null_label);
+ ig.Emit (OpCodes.Pop);
+ ig.MarkLabel (is_null_label);
+ null_value.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (wrap_label);
+ ig.Emit (OpCodes.Nop);
+ bool_wrap.Emit (ec);
+ ig.Emit (OpCodes.Nop);
+
+ ig.MarkLabel (end_label);
+ }
+
+ void EmitEquality (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ Label left_not_null_label = ig.DefineLabel ();
+ Label false_label = ig.DefineLabel ();
+ Label true_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ if (left_unwrap != null) {
+ left_unwrap.EmitCheck (ec);
+ if (right is NullLiteral) {
+ if (Oper == Binary.Operator.Equality)
+ ig.Emit (OpCodes.Brfalse, true_label);
+ else
+ ig.Emit (OpCodes.Brfalse, false_label);
+ } else if (right_unwrap != null) {
+ ig.Emit (OpCodes.Dup);
+ ig.Emit (OpCodes.Brtrue, left_not_null_label);
+ right_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Ceq);
+ if (Oper == Binary.Operator.Inequality) {
+ ig.Emit (OpCodes.Ldc_I4_0);
+ ig.Emit (OpCodes.Ceq);
+ }
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (left_not_null_label);
+ ig.Emit (OpCodes.Pop);
+ } else {
+ if (Oper == Binary.Operator.Equality)
+ ig.Emit (OpCodes.Brfalse, false_label);
+ else
+ ig.Emit (OpCodes.Brfalse, true_label);
+ }
+ }
+
+ if (right_unwrap != null) {
+ right_unwrap.EmitCheck (ec);
+ if (left is NullLiteral) {
+ if (Oper == Binary.Operator.Equality)
+ ig.Emit (OpCodes.Brfalse, true_label);
+ else
+ ig.Emit (OpCodes.Brfalse, false_label);
+ } else {
+ if (Oper == Binary.Operator.Equality)
+ ig.Emit (OpCodes.Brfalse, false_label);
+ else
+ ig.Emit (OpCodes.Brfalse, true_label);
+ }
+ }
+
+ bool left_is_null = left is NullLiteral;
+ bool right_is_null = right is NullLiteral;
+ if (left_is_null || right_is_null) {
+ if (((Oper == Binary.Operator.Equality) && (left_is_null == right_is_null)) ||
+ ((Oper == Binary.Operator.Inequality) && (left_is_null != right_is_null)))
+ ig.Emit (OpCodes.Br, true_label);
+ else
+ ig.Emit (OpCodes.Br, false_label);
+ } else {
+ underlying.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+ }
+
+ ig.MarkLabel (false_label);
+ ig.Emit (OpCodes.Ldc_I4_0);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (true_label);
+ ig.Emit (OpCodes.Ldc_I4_1);
+
+ ig.MarkLabel (end_label);
+ }
+
+ void EmitComparision (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ Label is_null_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ if (left_unwrap != null) {
+ left_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+ }
+
+ if (right_unwrap != null) {
+ right_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+ }
+
+ underlying.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (is_null_label);
+ ig.Emit (OpCodes.Ldc_I4_0);
+
+ ig.MarkLabel (end_label);
+ }
+
public override void Emit (EmitContext ec)
{
+ if (is_boolean) {
+ EmitBoolean (ec);
+ return;
+ } else if (is_equality) {
+ EmitEquality (ec);
+ return;
+ } else if (is_comparision) {
+ EmitComparision (ec);
+ return;
+ }
+
ILGenerator ig = ec.ig;
- Label has_value_label = ig.DefineLabel ();
+
+ Label is_null_label = ig.DefineLabel ();
Label end_label = ig.DefineLabel ();
- ((IMemoryLocation) source).AddressOf (ec, AddressOp.LoadStore);
- ig.EmitCall (OpCodes.Call, source_info.HasValue, null);
- ig.Emit (OpCodes.Brtrue, has_value_label);
+ if (left_unwrap != null) {
+ left_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+ }
- LocalTemporary value_target = new LocalTemporary (ec, type);
- value_target.AddressOf (ec, AddressOp.Store);
- ig.Emit (OpCodes.Initobj, type);
- value_target.Emit (ec);
- value_target.Release (ec);
+ if (right_unwrap != null) {
+ right_unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+ }
+
+ underlying.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (is_null_label);
+ null_value.Emit (ec);
+
+ ig.MarkLabel (end_label);
+ }
+ }
+
+ public class OperatorTrueOrFalse : Expression
+ {
+ public readonly bool IsTrue;
+
+ Expression expr;
+ Unwrap unwrap;
+
+ public OperatorTrueOrFalse (Expression expr, bool is_true, Location loc)
+ {
+ this.IsTrue = is_true;
+ this.expr = expr;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ unwrap = new Unwrap (expr, loc);
+ expr = unwrap.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ if (unwrap.Type != TypeManager.bool_type)
+ return null;
+
+ type = TypeManager.bool_type;
+ eclass = ExprClass.Value;
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ Label is_null_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+
+ unwrap.Emit (ec);
+ if (!IsTrue) {
+ ig.Emit (OpCodes.Ldc_I4_0);
+ ig.Emit (OpCodes.Ceq);
+ }
ig.Emit (OpCodes.Br, end_label);
- ig.MarkLabel (has_value_label);
+ ig.MarkLabel (is_null_label);
+ ig.Emit (OpCodes.Ldc_I4_0);
+
+ ig.MarkLabel (end_label);
+ }
+ }
+
+ public class NullCoalescingOperator : Expression
+ {
+ Expression left, right;
+ Expression expr;
+ Unwrap unwrap;
+
+ public NullCoalescingOperator (Expression left, Expression right, Location loc)
+ {
+ this.left = left;
+ this.right = right;
+ this.loc = loc;
+
+ eclass = ExprClass.Value;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (type != null)
+ return this;
+
+ left = left.Resolve (ec);
+ if (left == null)
+ return null;
+
+ right = right.Resolve (ec);
+ if (right == null)
+ return null;
+
+ Type ltype = left.Type, rtype = right.Type;
+
+ if (!TypeManager.IsNullableType (ltype) && ltype.IsValueType) {
+ Binary.Error_OperatorCannotBeApplied (loc, "??", ltype, rtype);
+ return null;
+ }
+
+ if (TypeManager.IsNullableType (ltype)) {
+ NullableInfo info = new NullableInfo (ltype);
+
+ unwrap = (Unwrap) new Unwrap (left, loc).Resolve (ec);
+ if (unwrap == null)
+ return null;
+
+ expr = Convert.ImplicitConversion (ec, right, info.UnderlyingType, loc);
+ if (expr != null) {
+ left = unwrap;
+ type = expr.Type;
+ return this;
+ }
+ }
+
+ expr = Convert.ImplicitConversion (ec, right, ltype, loc);
+ if (expr != null) {
+ type = expr.Type;
+ return this;
+ }
+
+ if (unwrap != null) {
+ expr = Convert.ImplicitConversion (ec, unwrap, rtype, loc);
+ if (expr != null) {
+ left = expr;
+ expr = right;
+ type = expr.Type;
+ return this;
+ }
+ }
+
+ Binary.Error_OperatorCannotBeApplied (loc, "??", ltype, rtype);
+ return null;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ Label is_null_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ if (unwrap != null) {
+ unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+
+ left.Emit (ec);
+ ig.Emit (OpCodes.Br, end_label);
+
+ ig.MarkLabel (is_null_label);
+ expr.Emit (ec);
+
+ ig.MarkLabel (end_label);
+ } else {
+ left.Emit (ec);
+ ig.Emit (OpCodes.Dup);
+ ig.Emit (OpCodes.Brtrue, end_label);
+
+ ig.MarkLabel (is_null_label);
+
+ ig.Emit (OpCodes.Pop);
+ expr.Emit (ec);
+
+ ig.MarkLabel (end_label);
+ }
+ }
+ }
+
+ public class LiftedUnaryMutator : ExpressionStatement
+ {
+ public readonly UnaryMutator.Mode Mode;
+ Expression expr, null_value;
+ UnaryMutator underlying;
+ Unwrap unwrap;
+
+ public LiftedUnaryMutator (UnaryMutator.Mode mode, Expression expr, Location loc)
+ {
+ this.expr = expr;
+ this.Mode = mode;
+ this.loc = loc;
+
+ eclass = ExprClass.Value;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ expr = expr.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ unwrap = (Unwrap) new Unwrap (expr, loc).Resolve (ec);
+ if (unwrap == null)
+ return null;
+
+ underlying = (UnaryMutator) new UnaryMutator (Mode, unwrap, loc).Resolve (ec);
+ if (underlying == null)
+ return null;
+
+ null_value = new NullableLiteral (expr.Type, loc).Resolve (ec);
+ if (null_value == null)
+ return null;
+
+ type = expr.Type;
+ return this;
+ }
+
+ void DoEmit (EmitContext ec, bool is_expr)
+ {
+ ILGenerator ig = ec.ig;
+ Label is_null_label = ig.DefineLabel ();
+ Label end_label = ig.DefineLabel ();
+
+ unwrap.EmitCheck (ec);
+ ig.Emit (OpCodes.Brfalse, is_null_label);
+
+ if (is_expr)
+ underlying.Emit (ec);
+ else
+ underlying.EmitStatement (ec);
+ ig.Emit (OpCodes.Br, end_label);
- ((IMemoryLocation) source).AddressOf (ec, AddressOp.LoadStore);
- ig.EmitCall (OpCodes.Call, source_info.Value, null);
- conversion.Emit (ec);
- ig.Emit (OpCodes.Newobj, target_info.Constructor);
+ ig.MarkLabel (is_null_label);
+ if (is_expr)
+ null_value.Emit (ec);
ig.MarkLabel (end_label);
}
+
+ public override void Emit (EmitContext ec)
+ {
+ DoEmit (ec, true);
+ }
+
+ public override void EmitStatement (EmitContext ec)
+ {
+ DoEmit (ec, false);
+ }
}
}
}
projects / mono.git / blobdiff