+ protected Constant (Location loc)
+ {
+ 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)
+ {
+ Constant c = ImplicitConversionRequired (valueType, loc);
+ if (c == null) {
+ value = null;
+ return false;
+ }
+
+ value = c.GetTypedValue ();
+ return true;
+ }
+
+ /// <summary>
+ /// This is used to obtain the actual value of the literal
+ /// cast into an object.
+ /// </summary>
+ public abstract object GetValue ();
+
+ public virtual object GetTypedValue ()
+ {
+ return GetValue ();
+ }
+
+ /// <summary>
+ /// Constants are always born in a fully resolved state
+ /// </summary>
+ public override Expression DoResolve (EmitContext ec)
+ {
+ return this;
+ }
+
+ public Constant ImplicitConversionRequired (Type type, Location loc)
+ {
+ Constant c = ToType (type);
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, type, false);
+ return c;
+ }
+
+ //
+ // The various ToXXXX conversion functions are used by the constant
+ // folding evaluator. A null value is returned if the conversion is
+ // not possible.
+ //
+ // Note: not all the patterns for catching `implicit_conv' are the same.
+ // some implicit conversions can never be performed between two types
+ // even if the conversion would be lossless (for example short to uint),
+ // but some conversions are explicitly permitted by the standard provided
+ // that there will be no loss of information (for example, int to uint).
+ //
+ public DoubleConstant ToDouble (Location loc)
+ {
+ DoubleConstant c = ConvertToDouble ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.double_type, false);
+
+ return c;
+ }
+
+ public FloatConstant ToFloat (Location loc)
+ {
+ FloatConstant c = ConvertToFloat ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.float_type, false);
+
+ return c;
+ }
+
+ public ULongConstant ToULong (Location loc)
+ {
+ ULongConstant c = ConvertToULong ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.uint64_type, false);
+
+ return c;
+ }
+
+ public LongConstant ToLong (Location loc)
+ {
+ LongConstant c = ConvertToLong ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.int64_type, false);
+
+ return c;
+ }
+
+ public UIntConstant ToUInt (Location loc)
+ {
+ UIntConstant c = ConvertToUInt ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.uint32_type, false);
+
+ return c;
+ }
+
+ public IntConstant ToInt (Location loc)
+ {
+ IntConstant c = ConvertToInt ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.int32_type, false);
+
+ return c;
+ }
+
+ public DecimalConstant ToDecimal (Location loc)
+ {
+ DecimalConstant c = ConvertToDecimal ();
+
+ if (c == null)
+ Error_ValueCannotBeConverted (loc, TypeManager.decimal_type, false);
+
+ return c;
+ }
+
+ public virtual Constant ToType (Type type)
+ {
+ if (Type == type)
+ return this;
+
+ if (type == TypeManager.object_type)
+ return this;
+
+ if (!Convert.ImplicitStandardConversionExists (this, type)){
+ return null;
+ }
+
+ // Special-case: The 0 literal can be converted to an enum value,
+ // and ImplicitStandardConversionExists will return true in that case.
+ if (IsZeroInteger && Type == TypeManager.int32_type && TypeManager.IsEnumType (type)) {
+ return new EnumConstant (this, type);
+ }
+
+ bool fail;
+ object constant_value = TypeManager.ChangeType (GetValue (), type, out fail);
+ if (fail){
+ //
+ // 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));
+ }
+
+ return CreateConstant (type, constant_value, loc);
+ }
+
+ /// Returns a constant instance based on Type
+ /// The returned value is already resolved.
+ public static Constant CreateConstant (Type t, object v, Location loc)
+ {
+ if (t == TypeManager.int32_type)
+ return new IntConstant ((int) v, loc);
+ if (t == TypeManager.string_type)
+ return new StringConstant ((string) v, loc);
+ if (t == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v, loc);
+ if (t == TypeManager.int64_type)
+ return new LongConstant ((long) v, loc);
+ if (t == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v, loc);
+ if (t == TypeManager.float_type)
+ return new FloatConstant ((float) v, loc);
+ if (t == TypeManager.double_type)
+ return new DoubleConstant ((double) v, loc);
+ if (t == TypeManager.short_type)
+ return new ShortConstant ((short)v, loc);
+ if (t == TypeManager.ushort_type)
+ return new UShortConstant ((ushort)v, loc);
+ if (t == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte)v, loc);
+ if (t == TypeManager.byte_type)
+ return new ByteConstant ((byte)v, loc);
+ if (t == TypeManager.char_type)
+ return new CharConstant ((char)v, loc);
+ if (t == TypeManager.bool_type)
+ return new BoolConstant ((bool) 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);
+
+ throw new Exception ("Unknown type for constant (" + t +
+ "), details: " + v);
+ }
+
+ protected static void CheckRange (bool inCheckedContext, ulong value, ulong max)
+ {
+ if (!inCheckedContext)
+ return;
+
+ if (value > max)
+ throw new OverflowException ();
+ }
+
+ protected static void CheckRange (bool inCheckedContext, double value, long min, long max)
+ {
+ if (!inCheckedContext)
+ return;
+
+ if (((value < min) || (value > max)))
+ throw new OverflowException ();
+
+ if (double.IsNaN (value))
+ throw new OverflowException ();
+ }
+
+ protected static void CheckRange (bool inCheckedContext, double value, ulong min, ulong max)
+ {
+ if (!inCheckedContext)
+ return;
+
+ if (((value < min) || (value > max)))
+ throw new OverflowException ();
+
+ if (double.IsNaN (value))
+ throw new OverflowException ();
+ }
+
+ protected static void CheckUnsigned (bool inCheckedContext, long value)
+ {
+ if (!inCheckedContext)
+ return;
+
+ if (value < 0)
+ throw new OverflowException ();
+ }
+
+ /// <summary>
+ /// Maybe ConvertTo name is better. It tries to convert `this' constant to target_type.
+ /// It throws OverflowException
+ /// </summary>
+ public abstract Constant Reduce (bool inCheckedContext, Type 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)
+ {
+ 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));
+ throw;
+ }
+ }
+
+ Constant TryReduce (EmitContext ec, Type target_type)
+ {
+ if (Type == target_type)
+ return this;
+
+ if (TypeManager.IsEnumType (target_type)) {
+ Constant c = TryReduce (ec, TypeManager.EnumToUnderlying (target_type));
+ if (c == null)
+ return null;
+
+ return new EnumConstant (c, target_type);
+ }
+
+ return Reduce (ec.ConstantCheckState, target_type);
+ }
+
+
+ public virtual DecimalConstant ConvertToDecimal ()
+ {
+ return null;
+ }
+
+ public virtual DoubleConstant ConvertToDouble ()
+ {
+ return null;
+ }
+
+ public virtual FloatConstant ConvertToFloat ()
+ {
+ return null;
+ }
+
+ public virtual ULongConstant ConvertToULong ()
+ {
+ return null;
+ }
+
+ public virtual LongConstant ConvertToLong ()
+ {
+ return null;
+ }
+
+ public virtual UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public virtual IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+
+ 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)
+ {
+ if (type == Type)
+ return IsDefaultValue;
+
+ return Type == TypeManager.null_type;
+ }
+
+ public abstract bool IsDefaultValue {
+ get;
+ }
+
+ public abstract bool IsNegative {
+ get;
+ }
+
+ //
+ // 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 abstract class IntegralConstant : Constant {
+ protected IntegralConstant (Location loc) :
+ base (loc)
+ {
+ }
+
+ public override void Error_ValueCannotBeConverted (Location loc, Type target, bool expl)
+ {
+ try {
+ Reduce (true, target);
+ base.Error_ValueCannotBeConverted (loc, target, expl);
+ }
+ catch
+ {
+ Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
+ GetValue ().ToString (), TypeManager.CSharpName (target));
+ }
+ }
+ }
+
+ public class BoolConstant : Constant {
+ public readonly bool Value;
+
+ public BoolConstant (bool val, Location loc):
+ base (loc)
+ {
+ type = TypeManager.bool_type;
+ eclass = ExprClass.Value;
+
+ Value = val;
+ }
+
+ override public string AsString ()
+ {
+ return Value ? "true" : "false";
+ }
+
+ public override object GetValue ()
+ {
+ return (object) Value;
+ }
+
+
+ public override void Emit (EmitContext ec)
+ {
+ if (Value)
+ ec.ig.Emit (OpCodes.Ldc_I4_1);
+ else
+ ec.ig.Emit (OpCodes.Ldc_I4_0);
+ }
+
+ public override Constant Increment ()
+ {
+ throw new NotSupportedException ();
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return !Value;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return false;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == false; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ return null;
+ }
+
+ }
+
+ public class ByteConstant : IntegralConstant {
+ public readonly byte Value;
+
+ public ByteConstant (byte v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.byte_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value, loc);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value, loc);
+ }
+
+ public override Constant Increment ()
+ {
+ return new ByteConstant (checked ((byte)(Value + 1)), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return false;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) Value, Location);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) Value, Location);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) Value, Location);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) Value, Location);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) Value, Location);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type)
+ return new CharConstant ((char) Value, Location);
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ }
+
+ public class CharConstant : Constant {
+ public readonly char Value;
+
+ public CharConstant (char v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.char_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ static public string descape (char c)
+ {
+ switch (c){
+ case '\a':
+ return "\\a";
+ case '\b':
+ return "\\b";
+ case '\n':
+ return "\\n";
+ case '\t':
+ return "\\t";
+ case '\v':
+ return "\\v";
+ case '\r':
+ return "\\r";
+ case '\\':
+ return "\\\\";
+ case '\f':
+ return "\\f";
+ case '\0':
+ return "\\0";
+ case '"':
+ return "\\\"";
+ case '\'':
+ return "\\\'";
+ }
+ return c.ToString ();
+ }
+
+ public override string AsString ()
+ {
+ return "\"" + descape (Value) + "\"";
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value, loc);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value, loc);
+ }
+
+ public override Constant Increment ()
+ {
+ return new CharConstant (checked ((char)(Value + 1)), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return false;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == '\0'; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckRange (inCheckedContext, Value, Byte.MinValue, Byte.MaxValue);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ CheckRange (inCheckedContext, Value, Int16.MinValue, Int16.MaxValue);
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) Value, Location);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) Value, Location);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) Value, Location);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ }
+
+ public class SByteConstant : IntegralConstant {
+ public readonly sbyte Value;
+
+ public SByteConstant (sbyte v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.sbyte_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value >= 0)
+ return new ULongConstant ((ulong) Value, loc);
+
+ return null;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value, loc);
+ }
+
+ public override Constant Increment ()
+ {
+ return new SByteConstant (checked((sbyte)(Value + 1)), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return Value < 0;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) Value, Location);
+ if (target_type == TypeManager.ushort_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new UShortConstant ((ushort) Value, Location);
+ } if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) Value, Location);
+ if (target_type == TypeManager.uint32_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new UIntConstant ((uint) Value, Location);
+ } if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new ULongConstant ((ulong) Value, Location);
+ }
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ }
+
+ public class ShortConstant : IntegralConstant {
+ public readonly short Value;
+
+ public ShortConstant (short v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.short_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return null;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value, loc);
+ }
+
+ public override Constant Increment ()
+ {
+ return new ShortConstant (checked((short)(Value + 1)), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override bool IsNegative {
+ get {
+ return Value < 0;
+ }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckRange (inCheckedContext, Value, Byte.MinValue, Byte.MaxValue);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) Value, Location);
+ if (target_type == TypeManager.uint32_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new UIntConstant ((uint) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new ULongConstant ((ulong) Value, Location);
+ }
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ CheckRange (inCheckedContext, Value, Char.MinValue, Char.MaxValue);
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ }
+
+ public class UShortConstant : IntegralConstant {
+ public readonly ushort Value;
+
+ public UShortConstant (ushort v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.ushort_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value, loc);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value, loc);
+ }
+
+ public override Constant Increment ()
+ {
+ return new UShortConstant (checked((ushort)(Value + 1)), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return false;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckRange (inCheckedContext, Value, Byte.MinValue, Byte.MaxValue);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ CheckRange (inCheckedContext, Value, Int16.MinValue, Int16.MaxValue);
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) Value, Location);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) Value, Location);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) Value, Location);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ CheckRange (inCheckedContext, Value, Char.MinValue, Char.MaxValue);
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+ }
+
+ public class IntConstant : IntegralConstant {
+ public readonly int Value;
+
+ 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)
+ {
+ 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;
+ }
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DecimalConstant ConvertToDecimal()
+ {
+ return new DecimalConstant (Value, loc);
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new ULongConstant ((ulong) Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new UIntConstant ((uint) Value, loc);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return this;
+ }
+
+ public override Constant Increment ()
+ {
+ return new IntConstant (checked(Value + 1), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return Value < 0;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckRange (inCheckedContext, Value, Byte.MinValue, Byte.MaxValue);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ CheckRange (inCheckedContext, Value, Int16.MinValue, Int16.MaxValue);
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ CheckRange (inCheckedContext, Value, UInt16.MinValue, UInt16.MaxValue);
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.uint32_type) {
+ CheckRange (inCheckedContext, Value, UInt32.MinValue, UInt32.MaxValue);
+ return new UIntConstant ((uint) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type) {
+ CheckUnsigned (inCheckedContext, Value);
+ return new ULongConstant ((ulong) Value, Location);
+ }
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ CheckRange (inCheckedContext, Value, Char.MinValue, Char.MaxValue);
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+ }
+
+ public class UIntConstant : IntegralConstant {
+ public readonly uint Value;
+
+ public UIntConstant (uint v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.uint32_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, unchecked ((int) Value));
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value, loc);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return this;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+
+ public override Constant Increment ()
+ {
+ return new UIntConstant (checked(Value + 1), loc);
+ }
+
+ public override bool IsDefaultValue {
+ get {
+ return Value == 0;
+ }
+ }
+
+ public override bool IsNegative {
+ get {
+ return false;
+ }
+ }
+
+ public override bool IsZeroInteger {
+ get { return Value == 0; }
+ }
+
+ public override Constant Reduce (bool inCheckedContext, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ CheckRange (inCheckedContext, Value, Char.MinValue, Char.MaxValue);
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ CheckRange (inCheckedContext, Value, SByte.MinValue, SByte.MaxValue);
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ CheckRange (inCheckedContext, Value, Int16.MinValue, Int16.MaxValue);
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ CheckRange (inCheckedContext, Value, UInt16.MinValue, UInt16.MaxValue);
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type) {
+ CheckRange (inCheckedContext, Value, Int32.MinValue, Int32.MaxValue);
+ return new IntConstant ((int) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) Value, Location);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) Value, Location);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, Location);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ CheckRange (inCheckedContext, Value, Char.MinValue, Char.MaxValue);
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ }
+
+ public class LongConstant : IntegralConstant {
+ public readonly long Value;
+
+ public LongConstant (long v, Location loc):
+ base (loc)
+ {
+ type = TypeManager.int64_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ EmitLong (ec.ig, Value);
+ }
+
+ static public void EmitLong (ILGenerator ig, long l)
+ {
+ 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);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value, loc);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value, loc);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new ULongConstant ((ulong) Value, loc);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return this;
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }