// Miguel de Icaza (miguel@ximian.com)
// Marek Safar (marek.safar@seznam.cz)
//
-// (C) 2001 Ximian, Inc.
-//
+// Copyright 2001-2003 Ximian, Inc.
+// Copyright 2003-2008 Novell, Inc.
//
-namespace Mono.CSharp {
+using System;
- using System;
- using System.Reflection.Emit;
+#if STATIC
+using IKVM.Reflection.Emit;
+#else
+using System.Reflection.Emit;
+#endif
+
+namespace Mono.CSharp {
/// <summary>
/// Base class for constants and literals.
this.loc = loc;
}
- /// <remarks>
- /// This is different from ToString in that ToString
- /// is supposed to be there for debugging purposes,
- /// and is not guaranteed to be useful for anything else,
- /// AsString() will provide something that can be used
- /// for round-tripping C# code. Maybe it can be used
- /// for IL assembly as well.
- /// </remarks>
- public abstract string AsString ();
-
override public string ToString ()
{
- return this.GetType ().Name + " (" + AsString () + ")";
- }
-
- public override bool GetAttributableValue (Type valueType, out object value)
- {
- if (valueType == TypeManager.object_type) {
- value = GetTypedValue ();
- return true;
- }
-
- Constant c = ImplicitConversionRequired (valueType, loc);
- if (c == null) {
- value = null;
- return false;
- }
-
- value = c.GetTypedValue ();
- return true;
+ return this.GetType ().Name + " (" + GetValueAsLiteral () + ")";
}
/// <summary>
/// </summary>
public abstract object GetValue ();
+ public abstract string GetValueAsLiteral ();
+
+#if !STATIC
+ //
+ // Returns an object value which is typed to contant type
+ //
public virtual object GetTypedValue ()
{
return GetValue ();
}
+#endif
- /// <summary>
- /// Constants are always born in a fully resolved state
- /// </summary>
- public override Expression DoResolve (EmitContext ec)
+ public override void Error_ValueCannotBeConverted (ResolveContext ec, Location loc, TypeSpec target, bool expl)
{
- return this;
+ if (!expl && IsLiteral &&
+ (TypeManager.IsPrimitiveType (target) || type == TypeManager.decimal_type) &&
+ (TypeManager.IsPrimitiveType (type) || type == TypeManager.decimal_type)) {
+ ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
+ GetValueAsLiteral (), TypeManager.CSharpName (target));
+ } else {
+ base.Error_ValueCannotBeConverted (ec, loc, target, expl);
+ }
}
- public Constant ImplicitConversionRequired (Type type, Location loc)
+ public Constant ImplicitConversionRequired (ResolveContext ec, TypeSpec type, Location loc)
{
- Constant c = ConvertImplicitly (type);
+ Constant c = ConvertImplicitly (ec, type);
if (c == null)
- Error_ValueCannotBeConverted (null, loc, type, false);
+ Error_ValueCannotBeConverted (ec, loc, type, false);
+
return c;
}
- public virtual Constant ConvertImplicitly (Type type)
+ public virtual Constant ConvertImplicitly (ResolveContext rc, TypeSpec type)
{
if (this.type == type)
return this;
// We should always catch the error before this is ever
// reached, by calling Convert.ImplicitStandardConversionExists
//
- throw new Exception (
- String.Format ("LookupConstantValue: This should never be reached {0} {1}", Type, type));
+ throw new InternalErrorException ("Missing constant conversion between `{0}' and `{1}'",
+ TypeManager.CSharpName (Type), TypeManager.CSharpName (type));
}
- return CreateConstant (type, constant_value, loc);
+ return CreateConstant (rc, type, constant_value, loc);
+ }
+
+ //
+ // Returns a constant instance based on Type
+ //
+ public static Constant CreateConstant (ResolveContext rc, TypeSpec t, object v, Location loc)
+ {
+ return CreateConstantFromValue (t, v, loc).Resolve (rc);
}
- /// Returns a constant instance based on Type
- /// The returned value is already resolved.
- public static Constant CreateConstant (Type t, object v, Location loc)
+ public static Constant CreateConstantFromValue (TypeSpec t, object v, Location loc)
{
if (t == TypeManager.int32_type)
return new IntConstant ((int) v, loc);
if (t == TypeManager.decimal_type)
return new DecimalConstant ((decimal) v, loc);
if (TypeManager.IsEnumType (t)) {
- Type real_type = TypeManager.TypeToCoreType (v.GetType ());
- if (real_type == t)
- real_type = System.Enum.GetUnderlyingType (real_type);
- return new EnumConstant (CreateConstant (real_type, v, loc), t);
- }
- if (v == null && !TypeManager.IsValueType (t))
- return new EmptyConstantCast (new NullConstant (loc), t);
+ var real_type = EnumSpec.GetUnderlyingType (t);
+ return new EnumConstant (CreateConstantFromValue (real_type, v, loc).Resolve (null), t);
+ }
+ if (v == null) {
+ if (TypeManager.IsNullableType (t))
+ return Nullable.LiftedNull.Create (t, loc);
- throw new Exception ("Unknown type for constant (" + t +
- "), details: " + v);
+ if (TypeManager.IsReferenceType (t))
+ return new NullConstant (t, loc);
+ }
+
+ throw new InternalErrorException ("Constant value `{0}' has unexpected underlying type `{1}'",
+ v, TypeManager.CSharpName (t));
}
+
+ public override Expression CreateExpressionTree (ResolveContext ec)
+ {
+ Arguments args = new Arguments (2);
+ args.Add (new Argument (this));
+ args.Add (new Argument (new TypeOf (new TypeExpression (type, loc), loc)));
+
+ return CreateExpressionFactoryCall (ec, "Constant", args);
+ }
+
+
/// <summary>
/// Maybe ConvertTo name is better. It tries to convert `this' constant to target_type.
/// It throws OverflowException
/// </summary>
// DON'T CALL THIS METHOD DIRECTLY AS IT DOES NOT HANDLE ENUMS
- public abstract Constant ConvertExplicitly (bool inCheckedContext, Type target_type);
+ public abstract Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type);
/// <summary>
/// Attempts to do a compile-time folding of a constant cast.
/// </summary>
- public Constant TryReduce (EmitContext ec, Type target_type, Location loc)
+ public Constant TryReduce (ResolveContext ec, TypeSpec target_type, Location loc)
{
try {
return TryReduce (ec, target_type);
}
catch (OverflowException) {
- Report.Error (221, loc, "Constant value `{0}' cannot be converted to a `{1}' (use `unchecked' syntax to override)",
- GetValue ().ToString (), TypeManager.CSharpName (target_type));
- return null;
+ if (ec.ConstantCheckState && Type.BuildinType != BuildinTypeSpec.Type.Decimal) {
+ ec.Report.Error (221, loc,
+ "Constant value `{0}' cannot be converted to a `{1}' (use `unchecked' syntax to override)",
+ GetValueAsLiteral (), target_type.GetSignatureForError ());
+ } else {
+ Error_ValueCannotBeConverted (ec, loc, target_type, false);
+ }
+
+ return New.Constantify (target_type, loc).Resolve (ec);
}
}
- Constant TryReduce (EmitContext ec, Type target_type)
+ Constant TryReduce (ResolveContext ec, TypeSpec target_type)
{
if (Type == target_type)
return this;
+ Constant c;
if (TypeManager.IsEnumType (target_type)) {
- Constant c = TryReduce (ec, TypeManager.EnumToUnderlying (target_type));
+ c = TryReduce (ec, EnumSpec.GetUnderlyingType (target_type));
if (c == null)
return null;
- return new EnumConstant (c, target_type);
+ return new EnumConstant (c, target_type).Resolve (ec);
}
- return ConvertExplicitly (ec.ConstantCheckState, target_type);
+ c = ConvertExplicitly (ec.ConstantCheckState, target_type);
+ if (c != null)
+ c = c.Resolve (ec);
+
+ return c;
}
- public abstract Constant Increment ();
-
/// <summary>
/// Need to pass type as the constant can require a boxing
/// and in such case no optimization is possible
/// </summary>
- public bool IsDefaultInitializer (Type type)
+ public bool IsDefaultInitializer (TypeSpec type)
{
if (type == Type)
return IsDefaultValue;
- return Type == TypeManager.null_type;
+ return this is NullLiteral;
}
public abstract bool IsDefaultValue {
get;
}
+ //
+ // When constant is declared as literal
+ //
+ public virtual bool IsLiteral {
+ get { return false; }
+ }
+
+ public virtual bool IsOneInteger {
+ get { return false; }
+ }
+
//
// Returns true iff 1) the stack type of this is one of Object,
// int32, int64 and 2) this == 0 or this == null.
public virtual bool IsZeroInteger {
get { return false; }
}
+
+ public override void EmitSideEffect (EmitContext ec)
+ {
+ // do nothing
+ }
+
+ public sealed override Expression Clone (CloneContext clonectx)
+ {
+ // No cloning is not needed for constants
+ return this;
+ }
+
+ protected override void CloneTo (CloneContext clonectx, Expression target)
+ {
+ throw new NotSupportedException ("should not be reached");
+ }
+
+ public override System.Linq.Expressions.Expression MakeExpression (BuilderContext ctx)
+ {
+#if STATIC
+ return base.MakeExpression (ctx);
+#else
+ return System.Linq.Expressions.Expression.Constant (GetTypedValue (), type.GetMetaInfo ());
+#endif
+ }
+
+ public new Constant Resolve (ResolveContext rc)
+ {
+ if (eclass != ExprClass.Unresolved)
+ return this;
+
+ // Resolved constant has to be still a constant
+ Constant c = (Constant) DoResolve (rc);
+ if (c == null)
+ return null;
+
+ if ((c.eclass & ExprClass.Value) == 0) {
+ c.Error_UnexpectedKind (rc, ResolveFlags.VariableOrValue, loc);
+ return null;
+ }
+
+ if (c.type == null)
+ throw new InternalErrorException ("Expression `{0}' did not set its type after Resolve", c.GetType ());
+
+ return c;
+ }
}
- public abstract class IntegralConstant : Constant {
+ public abstract class IntegralConstant : Constant
+ {
protected IntegralConstant (Location loc) :
base (loc)
{
}
- public override void Error_ValueCannotBeConverted (EmitContext ec, Location loc, Type target, bool expl)
+ public override void Error_ValueCannotBeConverted (ResolveContext ec, Location loc, TypeSpec target, bool expl)
{
try {
ConvertExplicitly (true, target);
}
catch
{
- Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
+ ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
GetValue ().ToString (), TypeManager.CSharpName (target));
}
}
+
+ public override string GetValueAsLiteral ()
+ {
+ return GetValue ().ToString ();
+ }
+
+ public abstract Constant Increment ();
}
public class BoolConstant : Constant {
public BoolConstant (bool val, Location loc):
base (loc)
+ {
+ Value = val;
+ }
+
+ protected override Expression DoResolve (ResolveContext ec)
{
type = TypeManager.bool_type;
eclass = ExprClass.Value;
+ return this;
+ }
- Value = val;
+ public override object GetValue ()
+ {
+ return (object) Value;
}
- override public string AsString ()
+ public override string GetValueAsLiteral ()
{
return Value ? "true" : "false";
}
- public override object GetValue ()
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- return (object) Value;
+ enc.Encode (Value);
}
-
public override void Emit (EmitContext ec)
{
if (Value)
- ec.ig.Emit (OpCodes.Ldc_I4_1);
+ ec.Emit (OpCodes.Ldc_I4_1);
else
- ec.ig.Emit (OpCodes.Ldc_I4_0);
+ ec.Emit (OpCodes.Ldc_I4_0);
}
- public override Constant Increment ()
- {
- throw new NotSupportedException ();
- }
-
public override bool IsDefaultValue {
get {
return !Value;
get { return Value == false; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
return null;
}
public ByteConstant (byte v, Location loc):
base (loc)
{
- type = TypeManager.byte_type;
- eclass = ExprClass.Value;
Value = v;
}
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
+ {
+ enc.Encode (Value);
+ }
+
public override void Emit (EmitContext ec)
{
- IntLiteral.EmitInt (ec.ig, Value);
+ ec.EmitInt (Value);
}
- public override string AsString ()
+ protected override Expression DoResolve (ResolveContext ec)
{
- return Value.ToString ();
+ type = TypeManager.byte_type;
+ eclass = ExprClass.Value;
+ return this;
}
public override object GetValue ()
}
}
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
+
public override bool IsNegative {
get {
return false;
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > SByte.MaxValue)
throw new OverflowException ();
}
public CharConstant (char v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.char_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
+ }
+
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
+ {
+ enc.Encode ((ushort) Value);
}
public override void Emit (EmitContext ec)
{
- IntLiteral.EmitInt (ec.ig, Value);
+ ec.EmitInt (Value);
}
- static public string descape (char c)
+ static string descape (char c)
{
switch (c){
case '\a':
return c.ToString ();
}
- public override string AsString ()
- {
- return "\"" + descape (Value) + "\"";
- }
-
public override object GetValue ()
{
return Value;
}
- public override Constant Increment ()
+ public override string GetValueAsLiteral ()
{
- return new CharConstant (checked ((char)(Value + 1)), loc);
+ return "\"" + descape (Value) + "\"";
}
-
+
public override bool IsDefaultValue {
get {
return Value == 0;
get { return Value == '\0'; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Byte.MinValue || Value > Byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Int16.MaxValue)
throw new OverflowException ();
}
public SByteConstant (sbyte v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.sbyte_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- IntLiteral.EmitInt (ec.ig, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitInt (Value);
}
public override object GetValue ()
}
}
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
+
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.short_type)
return new ShortConstant ((short) Value, Location);
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new UShortConstant ((ushort) Value, Location);
} if (target_type == TypeManager.int32_type)
return new IntConstant ((int) Value, Location);
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new UIntConstant ((uint) Value, Location);
} if (target_type == TypeManager.int64_type)
return new LongConstant ((long) Value, Location);
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new ULongConstant ((ulong) Value, Location);
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new CharConstant ((char) Value, Location);
}
public ShortConstant (short v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.short_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- IntLiteral.EmitInt (ec.ig, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitInt (Value);
}
public override object GetValue ()
return Value < 0;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Byte.MinValue || Value > Byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < SByte.MinValue || Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new UShortConstant ((ushort) Value, Location);
if (target_type == TypeManager.int32_type)
return new IntConstant ((int) Value, Location);
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new UIntConstant ((uint) Value, Location);
}
if (target_type == TypeManager.int64_type)
return new LongConstant ((long) Value, Location);
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new ULongConstant ((ulong) Value, Location);
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Char.MinValue)
throw new OverflowException ();
}
public UShortConstant (ushort v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.ushort_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- IntLiteral.EmitInt (ec.ig, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitInt (Value);
}
public override object GetValue ()
return false;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Int16.MaxValue)
throw new OverflowException ();
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Char.MaxValue)
throw new OverflowException ();
}
public IntConstant (int v, Location loc):
base (loc)
{
- type = TypeManager.int32_type;
- eclass = ExprClass.Value;
Value = v;
}
- static public void EmitInt (ILGenerator ig, int i)
+ protected override Expression DoResolve (ResolveContext rc)
{
- switch (i){
- case -1:
- ig.Emit (OpCodes.Ldc_I4_M1);
- break;
-
- case 0:
- ig.Emit (OpCodes.Ldc_I4_0);
- break;
-
- case 1:
- ig.Emit (OpCodes.Ldc_I4_1);
- break;
-
- case 2:
- ig.Emit (OpCodes.Ldc_I4_2);
- break;
-
- case 3:
- ig.Emit (OpCodes.Ldc_I4_3);
- break;
-
- case 4:
- ig.Emit (OpCodes.Ldc_I4_4);
- break;
-
- case 5:
- ig.Emit (OpCodes.Ldc_I4_5);
- break;
-
- case 6:
- ig.Emit (OpCodes.Ldc_I4_6);
- break;
-
- case 7:
- ig.Emit (OpCodes.Ldc_I4_7);
- break;
-
- case 8:
- ig.Emit (OpCodes.Ldc_I4_8);
- break;
-
- default:
- if (i >= -128 && i <= 127){
- ig.Emit (OpCodes.Ldc_I4_S, (sbyte) i);
- } else
- ig.Emit (OpCodes.Ldc_I4, i);
- break;
- }
+ type = TypeManager.int32_type;
+ eclass = ExprClass.Value;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- EmitInt (ec.ig, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitInt (Value);
}
public override object GetValue ()
return Value < 0;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Byte.MinValue || Value > Byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < SByte.MinValue || Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Int16.MinValue || Value > Int16.MaxValue)
throw new OverflowException ();
}
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
throw new OverflowException ();
}
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < UInt32.MinValue)
throw new OverflowException ();
}
if (target_type == TypeManager.int64_type)
return new LongConstant ((long) Value, Location);
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new ULongConstant ((ulong) Value, Location);
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Char.MinValue || Value > Char.MaxValue)
throw new OverflowException ();
}
return null;
}
- public override Constant ConvertImplicitly (Type type)
+ public override Constant ConvertImplicitly (ResolveContext rc, TypeSpec type)
{
if (this.type == type)
return this;
Constant c = TryImplicitIntConversion (type);
if (c != null)
- return c;
+ return c.Resolve (rc);
- return base.ConvertImplicitly (type);
+ return base.ConvertImplicitly (rc, type);
}
/// <summary>
/// into a different data type using casts (See Implicit Constant
/// Expression Conversions)
/// </summary>
- Constant TryImplicitIntConversion (Type target_type)
+ Constant TryImplicitIntConversion (TypeSpec target_type)
{
if (target_type == TypeManager.sbyte_type) {
if (Value >= SByte.MinValue && Value <= SByte.MaxValue)
public UIntConstant (uint v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.uint32_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- IntLiteral.EmitInt (ec.ig, unchecked ((int) Value));
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitInt (unchecked ((int) Value));
}
public override object GetValue ()
return false;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
- if (Value < Char.MinValue || Value > Char.MaxValue)
+ if (in_checked_context){
+ if (Value < 0 || Value > byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Int16.MaxValue)
throw new OverflowException ();
}
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
throw new OverflowException ();
}
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.int32_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value > Int32.MaxValue)
throw new OverflowException ();
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Char.MinValue || Value > Char.MaxValue)
throw new OverflowException ();
}
public LongConstant (long v, Location loc):
base (loc)
{
- type = TypeManager.int64_type;
- eclass = ExprClass.Value;
Value = v;
}
- public override void Emit (EmitContext ec)
+ protected override Expression DoResolve (ResolveContext rc)
{
- EmitLong (ec.ig, Value);
+ type = TypeManager.int64_type;
+ eclass = ExprClass.Value;
+ return this;
}
- static public void EmitLong (ILGenerator ig, long l)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- if (l >= int.MinValue && l <= int.MaxValue) {
- IntLiteral.EmitInt (ig, unchecked ((int) l));
- ig.Emit (OpCodes.Conv_I8);
- return;
- }
- ig.Emit (OpCodes.Ldc_I8, l);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitLong (Value);
}
public override object GetValue ()
return Value < 0;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Byte.MinValue || Value > Byte.MaxValue)
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < SByte.MinValue || Value > SByte.MaxValue)
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Int16.MinValue || Value > Int16.MaxValue)
throw new OverflowException ();
}
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
throw new OverflowException ();
}
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.int32_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Int32.MinValue || Value > Int32.MaxValue)
throw new OverflowException ();
}
return new IntConstant ((int) Value, Location);
}
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < UInt32.MinValue || Value > UInt32.MaxValue)
throw new OverflowException ();
}
return new UIntConstant ((uint) Value, Location);
}
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext && Value < 0)
+ if (in_checked_context && Value < 0)
throw new OverflowException ();
return new ULongConstant ((ulong) Value, Location);
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
+ if (in_checked_context){
if (Value < Char.MinValue || Value > Char.MaxValue)
throw new OverflowException ();
}
return null;
}
- public override Constant ConvertImplicitly (Type type)
+ public override Constant ConvertImplicitly (ResolveContext rc, TypeSpec type)
{
if (Value >= 0 && type == TypeManager.uint64_type) {
- return new ULongConstant ((ulong) Value, loc);
+ return new ULongConstant ((ulong) Value, loc).Resolve (rc);
}
- return base.ConvertImplicitly (type);
+ return base.ConvertImplicitly (rc, type);
}
}
public ULongConstant (ulong v, Location loc):
base (loc)
{
- type = TypeManager.uint64_type;
- eclass = ExprClass.Value;
Value = v;
}
- public override void Emit (EmitContext ec)
+ protected override Expression DoResolve (ResolveContext rc)
{
- ILGenerator ig = ec.ig;
+ type = TypeManager.uint64_type;
+ eclass = ExprClass.Value;
+ return this;
+ }
- LongLiteral.EmitLong (ig, unchecked ((long) Value));
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
+ {
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.EmitLong (unchecked ((long) Value));
}
public override object GetValue ()
return false;
}
}
+
+ public override bool IsOneInteger {
+ get {
+ return Value == 1;
+ }
+ }
public override bool IsZeroInteger {
get { return Value == 0; }
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext && Value > Byte.MaxValue)
+ if (in_checked_context && Value > Byte.MaxValue)
throw new OverflowException ();
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext && Value > ((ulong) SByte.MaxValue))
+ if (in_checked_context && Value > ((ulong) SByte.MaxValue))
throw new OverflowException ();
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext && Value > ((ulong) Int16.MaxValue))
+ if (in_checked_context && Value > ((ulong) Int16.MaxValue))
throw new OverflowException ();
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext && Value > UInt16.MaxValue)
+ if (in_checked_context && Value > UInt16.MaxValue)
throw new OverflowException ();
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.int32_type) {
- if (inCheckedContext && Value > UInt32.MaxValue)
+ if (in_checked_context && Value > UInt32.MaxValue)
throw new OverflowException ();
return new IntConstant ((int) Value, Location);
}
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext && Value > UInt32.MaxValue)
+ if (in_checked_context && Value > UInt32.MaxValue)
throw new OverflowException ();
return new UIntConstant ((uint) Value, Location);
}
if (target_type == TypeManager.int64_type) {
- if (inCheckedContext && Value > Int64.MaxValue)
+ if (in_checked_context && Value > Int64.MaxValue)
throw new OverflowException ();
return new LongConstant ((long) Value, Location);
}
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext && Value > Char.MaxValue)
+ if (in_checked_context && Value > Char.MaxValue)
throw new OverflowException ();
return new CharConstant ((char) Value, Location);
}
public FloatConstant (float v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.float_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- ec.ig.Emit (OpCodes.Ldc_R4, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.Emit (OpCodes.Ldc_R4, Value);
}
public override object GetValue ()
return Value;
}
- public override Constant Increment ()
+ public override string GetValueAsLiteral ()
{
- return new FloatConstant (checked(Value + 1), loc);
+ return Value.ToString ();
}
public override bool IsDefaultValue {
}
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
- if (Value < byte.MinValue || Value > byte.MaxValue)
+ if (in_checked_context){
+ if (Value < byte.MinValue || Value > byte.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
- if (Value < sbyte.MinValue || Value > sbyte.MaxValue)
+ if (in_checked_context){
+ if (Value < sbyte.MinValue || Value > sbyte.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
- if (Value < short.MinValue || Value > short.MaxValue)
+ if (in_checked_context){
+ if (Value < short.MinValue || Value > short.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext){
- if (Value < ushort.MinValue || Value > ushort.MaxValue)
+ if (in_checked_context){
+ if (Value < ushort.MinValue || Value > ushort.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.int32_type) {
- if (inCheckedContext){
- if (Value < int.MinValue || Value > int.MaxValue)
+ if (in_checked_context){
+ if (Value < int.MinValue || Value > int.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new IntConstant ((int) Value, Location);
}
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext){
- if (Value < uint.MinValue || Value > uint.MaxValue)
+ if (in_checked_context){
+ if (Value < uint.MinValue || Value > uint.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new UIntConstant ((uint) Value, Location);
}
if (target_type == TypeManager.int64_type) {
- if (inCheckedContext){
- if (Value < long.MinValue || Value > long.MaxValue)
+ if (in_checked_context){
+ if (Value < long.MinValue || Value > long.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new LongConstant ((long) Value, Location);
}
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext){
- if (Value < ulong.MinValue || Value > ulong.MaxValue)
+ if (in_checked_context){
+ if (Value < ulong.MinValue || Value > ulong.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new ULongConstant ((ulong) Value, Location);
if (target_type == TypeManager.double_type)
return new DoubleConstant ((double) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
- if (Value < (float) char.MinValue || Value > (float) char.MaxValue)
+ if (in_checked_context){
+ if (Value < (float) char.MinValue || Value > (float) char.MaxValue || float.IsNaN (Value))
throw new OverflowException ();
}
return new CharConstant ((char) Value, Location);
public DoubleConstant (double v, Location loc):
base (loc)
+ {
+ Value = v;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
{
type = TypeManager.double_type;
eclass = ExprClass.Value;
- Value = v;
+ return this;
}
- public override void Emit (EmitContext ec)
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- ec.ig.Emit (OpCodes.Ldc_R8, Value);
+ enc.Encode (Value);
}
- public override string AsString ()
+ public override void Emit (EmitContext ec)
{
- return Value.ToString ();
+ ec.Emit (OpCodes.Ldc_R8, Value);
}
public override object GetValue ()
return Value;
}
- public override Constant Increment ()
+ public override string GetValueAsLiteral ()
{
- return new DoubleConstant (checked(Value + 1), loc);
+ return Value.ToString ();
}
public override bool IsDefaultValue {
}
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.byte_type) {
- if (inCheckedContext){
- if (Value < Byte.MinValue || Value > Byte.MaxValue)
+ if (in_checked_context){
+ if (Value < Byte.MinValue || Value > Byte.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new ByteConstant ((byte) Value, Location);
}
if (target_type == TypeManager.sbyte_type) {
- if (inCheckedContext){
- if (Value < SByte.MinValue || Value > SByte.MaxValue)
+ if (in_checked_context){
+ if (Value < SByte.MinValue || Value > SByte.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new SByteConstant ((sbyte) Value, Location);
}
if (target_type == TypeManager.short_type) {
- if (inCheckedContext){
- if (Value < short.MinValue || Value > short.MaxValue)
+ if (in_checked_context){
+ if (Value < short.MinValue || Value > short.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new ShortConstant ((short) Value, Location);
}
if (target_type == TypeManager.ushort_type) {
- if (inCheckedContext){
- if (Value < ushort.MinValue || Value > ushort.MaxValue)
+ if (in_checked_context){
+ if (Value < ushort.MinValue || Value > ushort.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new UShortConstant ((ushort) Value, Location);
}
if (target_type == TypeManager.int32_type) {
- if (inCheckedContext){
- if (Value < int.MinValue || Value > int.MaxValue)
+ if (in_checked_context){
+ if (Value < int.MinValue || Value > int.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new IntConstant ((int) Value, Location);
}
if (target_type == TypeManager.uint32_type) {
- if (inCheckedContext){
- if (Value < uint.MinValue || Value > uint.MaxValue)
+ if (in_checked_context){
+ if (Value < uint.MinValue || Value > uint.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new UIntConstant ((uint) Value, Location);
}
if (target_type == TypeManager.int64_type) {
- if (inCheckedContext){
- if (Value < long.MinValue || Value > long.MaxValue)
+ if (in_checked_context){
+ if (Value < long.MinValue || Value > long.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new LongConstant ((long) Value, Location);
}
if (target_type == TypeManager.uint64_type) {
- if (inCheckedContext){
- if (Value < ulong.MinValue || Value > ulong.MaxValue)
+ if (in_checked_context){
+ if (Value < ulong.MinValue || Value > ulong.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new ULongConstant ((ulong) Value, Location);
if (target_type == TypeManager.float_type)
return new FloatConstant ((float) Value, Location);
if (target_type == TypeManager.char_type) {
- if (inCheckedContext){
- if (Value < (double) char.MinValue || Value > (double) char.MaxValue)
+ if (in_checked_context){
+ if (Value < (double) char.MinValue || Value > (double) char.MaxValue || double.IsNaN (Value))
throw new OverflowException ();
}
return new CharConstant ((char) Value, Location);
public DecimalConstant (decimal d, Location loc):
base (loc)
{
- type = TypeManager.decimal_type;
- eclass = ExprClass.Value;
Value = d;
}
- override public string AsString ()
+ protected override Expression DoResolve (ResolveContext rc)
{
- return Value.ToString ();
+ type = TypeManager.decimal_type;
+ eclass = ExprClass.Value;
+ return this;
}
public override object GetValue ()
{
- return (object) Value;
+ return Value;
}
- public override void Emit (EmitContext ec)
+ public override string GetValueAsLiteral ()
{
- ILGenerator ig = ec.ig;
+ return Value.ToString () + "M";
+ }
- int [] words = Decimal.GetBits (Value);
+ public override void Emit (EmitContext ec)
+ {
+ int [] words = decimal.GetBits (Value);
int power = (words [3] >> 16) & 0xff;
- if (power == 0 && Value <= int.MaxValue && Value >= int.MinValue)
- {
- IntConstant.EmitInt (ig, (int)Value);
- ig.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_int_arg);
- return;
- }
+ if (power == 0) {
+ if (Value <= int.MaxValue && Value >= int.MinValue) {
+ if (TypeManager.void_decimal_ctor_int_arg == null) {
+ TypeManager.void_decimal_ctor_int_arg = TypeManager.GetPredefinedConstructor (
+ TypeManager.decimal_type, loc, TypeManager.int32_type);
-
- //
- // FIXME: we could optimize this, and call a better
- // constructor
- //
+ if (TypeManager.void_decimal_ctor_int_arg == null)
+ return;
+ }
+
+ ec.EmitInt ((int) Value);
+ ec.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_int_arg);
+ return;
+ }
+
+ if (Value <= long.MaxValue && Value >= long.MinValue) {
+ if (TypeManager.void_decimal_ctor_long_arg == null) {
+ TypeManager.void_decimal_ctor_long_arg = TypeManager.GetPredefinedConstructor (
+ TypeManager.decimal_type, loc, TypeManager.int64_type);
+
+ if (TypeManager.void_decimal_ctor_long_arg == null)
+ return;
+ }
- IntConstant.EmitInt (ig, words [0]);
- IntConstant.EmitInt (ig, words [1]);
- IntConstant.EmitInt (ig, words [2]);
+ ec.EmitLong ((long) Value);
+ ec.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_long_arg);
+ return;
+ }
+ }
+
+ ec.EmitInt (words [0]);
+ ec.EmitInt (words [1]);
+ ec.EmitInt (words [2]);
// sign
- IntConstant.EmitInt (ig, words [3] >> 31);
+ ec.EmitInt (words [3] >> 31);
// power
- IntConstant.EmitInt (ig, power);
+ ec.EmitInt (power);
- ig.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_five_args);
- }
+ if (TypeManager.void_decimal_ctor_five_args == null) {
+ TypeManager.void_decimal_ctor_five_args = TypeManager.GetPredefinedConstructor (
+ TypeManager.decimal_type, loc, TypeManager.int32_type, TypeManager.int32_type,
+ TypeManager.int32_type, TypeManager.bool_type, TypeManager.byte_type);
- public override Constant Increment ()
- {
- return new DecimalConstant (checked (Value + 1), loc);
+ if (TypeManager.void_decimal_ctor_five_args == null)
+ return;
+ }
+
+ ec.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_five_args);
}
public override bool IsDefaultValue {
}
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
if (target_type == TypeManager.sbyte_type)
return new SByteConstant ((sbyte)Value, loc);
public StringConstant (string s, Location loc):
base (loc)
{
- type = TypeManager.string_type;
- eclass = ExprClass.Value;
Value = s;
}
- // FIXME: Escape the string.
- override public string AsString ()
+ protected override Expression DoResolve (ResolveContext rc)
{
- return "\"" + Value + "\"";
+ type = TypeManager.string_type;
+ eclass = ExprClass.Value;
+ return this;
}
public override object GetValue ()
{
return Value;
}
+
+ public override string GetValueAsLiteral ()
+ {
+ // FIXME: Escape the string.
+ return "\"" + Value + "\"";
+ }
public override void Emit (EmitContext ec)
{
- if (Value == null)
- ec.ig.Emit (OpCodes.Ldnull);
- else
- ec.ig.Emit (OpCodes.Ldstr, Value);
+ if (Value == null) {
+ ec.Emit (OpCodes.Ldnull);
+ return;
+ }
+
+ //
+ // Use string.Empty for both literals and constants even if
+ // it's not allowed at language level
+ //
+ if (Value.Length == 0 && RootContext.Optimize && ec.CurrentType != TypeManager.string_type) {
+ if (TypeManager.string_empty == null)
+ TypeManager.string_empty = TypeManager.GetPredefinedField (TypeManager.string_type, "Empty", loc, TypeManager.string_type);
+
+ if (TypeManager.string_empty != null) {
+ ec.Emit (OpCodes.Ldsfld, TypeManager.string_empty);
+ return;
+ }
+ }
+
+ ec.Emit (OpCodes.Ldstr, Value);
}
- public override Constant Increment ()
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
{
- throw new NotSupportedException ();
+ // cast to object
+ if (type != targetType)
+ enc.Encode (type);
+
+ enc.Encode (Value);
}
public override bool IsDefaultValue {
}
}
- public override Constant ConvertExplicitly (bool inCheckedContext, Type target_type)
+ public override bool IsNull {
+ get {
+ return IsDefaultValue;
+ }
+ }
+
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
{
return null;
}
}
-}
+ //
+ // Null constant can have its own type, think of `default (Foo)'
+ //
+ public class NullConstant : Constant
+ {
+ public NullConstant (TypeSpec type, Location loc)
+ : base (loc)
+ {
+ eclass = ExprClass.Value;
+ this.type = type;
+ }
+
+ public override Expression CreateExpressionTree (ResolveContext ec)
+ {
+ if (type == InternalType.Null || type == TypeManager.object_type) {
+ // Optimized version, also avoids referencing literal internal type
+ Arguments args = new Arguments (1);
+ args.Add (new Argument (this));
+ return CreateExpressionFactoryCall (ec, "Constant", args);
+ }
+
+ return base.CreateExpressionTree (ec);
+ }
+
+ protected override Expression DoResolve (ResolveContext ec)
+ {
+ return this;
+ }
+
+ public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType)
+ {
+ // Type it as string cast
+ if (targetType == TypeManager.object_type || targetType == InternalType.Null)
+ enc.Encode (TypeManager.string_type);
+
+ var ac = targetType as ArrayContainer;
+ if (ac != null) {
+ if (ac.Rank != 1 || ac.Element.IsArray)
+ base.EncodeAttributeValue (rc, enc, targetType);
+ else
+ enc.Encode (uint.MaxValue);
+ } else {
+ enc.Encode (byte.MaxValue);
+ }
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.Emit (OpCodes.Ldnull);
+
+ // Only to make verifier happy
+ if (TypeManager.IsGenericParameter (type))
+ ec.Emit (OpCodes.Unbox_Any, type);
+ }
+
+ public override string ExprClassName {
+ get {
+ return GetSignatureForError ();
+ }
+ }
+
+ public override Constant ConvertExplicitly (bool inCheckedContext, TypeSpec targetType)
+ {
+ if (targetType.IsPointer) {
+ if (IsLiteral || this is NullPointer)
+ return new EmptyConstantCast (new NullPointer (loc), targetType);
+ return null;
+ }
+
+ // Exlude internal compiler types
+ if (targetType.Kind == MemberKind.InternalCompilerType && targetType != InternalType.Dynamic && targetType != InternalType.Null)
+ return null;
+
+ if (!IsLiteral && !Convert.ImplicitStandardConversionExists (this, targetType))
+ return null;
+
+ if (TypeManager.IsReferenceType (targetType))
+ return new NullConstant (targetType, loc);
+
+ if (TypeManager.IsNullableType (targetType))
+ return Nullable.LiftedNull.Create (targetType, loc);
+
+ return null;
+ }
+
+ public override Constant ConvertImplicitly (ResolveContext rc, TypeSpec targetType)
+ {
+ return ConvertExplicitly (false, targetType);
+ }
+
+ public override string GetSignatureForError ()
+ {
+ return "null";
+ }
+ public override object GetValue ()
+ {
+ return null;
+ }
+
+ public override string GetValueAsLiteral ()
+ {
+ return GetSignatureForError ();
+ }
+
+ public override bool IsDefaultValue {
+ get { return true; }
+ }
+
+ public override bool IsNegative {
+ get { return false; }
+ }
+
+ public override bool IsNull {
+ get { return true; }
+ }
+
+ public override bool IsZeroInteger {
+ get { return true; }
+ }
+ }
+
+ /// <summary>
+ /// The value is constant, but when emitted has a side effect. This is
+ /// used by BitwiseAnd to ensure that the second expression is invoked
+ /// regardless of the value of the left side.
+ /// </summary>
+ public class SideEffectConstant : Constant {
+ public Constant value;
+ Expression side_effect;
+
+ public SideEffectConstant (Constant value, Expression side_effect, Location loc) : base (loc)
+ {
+ this.value = value;
+ while (side_effect is SideEffectConstant)
+ side_effect = ((SideEffectConstant) side_effect).side_effect;
+ this.side_effect = side_effect;
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
+ {
+ value = value.Resolve (rc);
+
+ type = value.Type;
+ eclass = ExprClass.Value;
+ return this;
+ }
+
+ public override object GetValue ()
+ {
+ return value.GetValue ();
+ }
+
+ public override string GetValueAsLiteral ()
+ {
+ return value.GetValueAsLiteral ();
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ side_effect.EmitSideEffect (ec);
+ value.Emit (ec);
+ }
+
+ public override void EmitSideEffect (EmitContext ec)
+ {
+ side_effect.EmitSideEffect (ec);
+ value.EmitSideEffect (ec);
+ }
+
+ public override bool IsDefaultValue {
+ get { return value.IsDefaultValue; }
+ }
+
+ public override bool IsNegative {
+ get { return value.IsNegative; }
+ }
+
+ public override bool IsZeroInteger {
+ get { return value.IsZeroInteger; }
+ }
+
+ public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
+ {
+ Constant new_value = value.ConvertExplicitly (in_checked_context, target_type);
+ return new_value == null ? null : new SideEffectConstant (new_value, side_effect, new_value.Location);
+ }
+ }
+}
projects / mono.git / blobdiff