//
// Author:
// Miguel de Icaza (miguel@ximian.com)
+// Marek Safar (marek.safar@seznam.cz)
//
// (C) 2001 Ximian, Inc.
//
return this.GetType ().Name + " (" + AsString () + ")";
}
+ public override bool GetAttributableValue (Type value_type, out object value)
+ {
+ if (value_type == TypeManager.object_type) {
+ value = GetTypedValue ();
+ return true;
+ }
+
+ Constant c = ImplicitConversionRequired (value_type, 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.
return this;
}
- //
- // 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)
+ public Constant ImplicitConversionRequired (Type type, 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 ();
-
+ Constant c = ConvertImplicitly (type);
if (c == null)
- Error_ValueCannotBeConverted (loc, TypeManager.decimal_type, false);
-
+ Error_ValueCannotBeConverted (null, loc, type, false);
return c;
}
- public virtual Constant ToType (Type type, Location loc)
+ public virtual Constant ConvertImplicitly (Type type)
{
- if (Type == type)
- return this;
-
- if (type == TypeManager.object_type)
+ if (this.type == type)
return this;
- if (!Convert.ImplicitStandardConversionExists (Convert.ConstantEC, this, type)){
- Error_ValueCannotBeConverted (loc, type, false);
+ if (Convert.ImplicitNumericConversion (this, type) == null)
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){
- Error_ValueCannotBeConverted (loc, type, false);
-
//
// 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));
- }
-
- Constant retval;
- if (type == TypeManager.int32_type)
- retval = new IntConstant ((int) constant_value, loc);
- else if (type == TypeManager.uint32_type)
- retval = new UIntConstant ((uint) constant_value, loc);
- else if (type == TypeManager.int64_type)
- retval = new LongConstant ((long) constant_value, loc);
- else if (type == TypeManager.uint64_type)
- retval = new ULongConstant ((ulong) constant_value, loc);
- else if (type == TypeManager.float_type)
- retval = new FloatConstant ((float) constant_value, loc);
- else if (type == TypeManager.double_type)
- retval = new DoubleConstant ((double) constant_value, loc);
- else if (type == TypeManager.string_type)
- retval = new StringConstant ((string) constant_value, loc);
- else if (type == TypeManager.short_type)
- retval = new ShortConstant ((short) constant_value, loc);
- else if (type == TypeManager.ushort_type)
- retval = new UShortConstant ((ushort) constant_value, loc);
- else if (type == TypeManager.sbyte_type)
- retval = new SByteConstant ((sbyte) constant_value, loc);
- else if (type == TypeManager.byte_type)
- retval = new ByteConstant ((byte) constant_value, loc);
- else if (type == TypeManager.char_type)
- retval = new CharConstant ((char) constant_value, loc);
- else if (type == TypeManager.bool_type)
- retval = new BoolConstant ((bool) constant_value, loc);
- else if (type == TypeManager.decimal_type)
- retval = new DecimalConstant ((decimal) constant_value, loc);
- else
- throw new Exception ("LookupConstantValue: Unhandled constant type: " + type);
-
- return retval;
- }
+ throw new InternalErrorException ("Missing constant conversion between `{0}' and `{1}'",
+ TypeManager.CSharpName (Type), TypeManager.CSharpName (type));
+ }
- public virtual DecimalConstant ConvertToDecimal ()
- {
- return null;
- }
-
- public virtual DoubleConstant ConvertToDouble ()
- {
- return null;
+ 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);
}
+ /// <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 in_checked_context, Type target_type);
- public virtual FloatConstant ConvertToFloat ()
+ /// <summary>
+ /// Attempts to do a compile-time folding of a constant cast.
+ /// </summary>
+ public Constant TryReduce (EmitContext ec, Type target_type, Location loc)
{
- return null;
+ 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;
+ }
}
- public virtual ULongConstant ConvertToULong ()
+ Constant TryReduce (EmitContext ec, Type target_type)
{
- return null;
- }
+ if (Type == target_type)
+ return this;
- public virtual LongConstant ConvertToLong ()
- {
- return null;
- }
+ if (TypeManager.IsEnumType (target_type)) {
+ Constant c = TryReduce (ec, TypeManager.EnumToUnderlying (target_type));
+ if (c == null)
+ return null;
- public virtual UIntConstant ConvertToUInt ()
- {
- return null;
- }
+ return new EnumConstant (c, target_type);
+ }
- public virtual IntConstant ConvertToInt ()
- {
- return null;
+ return ConvertExplicitly (ec.ConstantCheckState, target_type);
}
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 virtual bool IsZeroInteger {
get { return false; }
}
+
+ protected override void CloneTo (CloneContext clonectx, Expression target)
+ {
+ // CloneTo: Nothing, we do not keep any state on this expression
+ }
+ }
+
+ public abstract class IntegralConstant : Constant {
+ protected IntegralConstant (Location loc) :
+ base (loc)
+ {
+ }
+
+ public override void Error_ValueCannotBeConverted (EmitContext ec, Location loc, Type target, bool expl)
+ {
+ try {
+ ConvertExplicitly (true, target);
+ base.Error_ValueCannotBeConverted (ec, 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 override bool IsZeroInteger {
get { return Value == false; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ return null;
+ }
+
}
- public class ByteConstant : Constant {
+ public class ByteConstant : IntegralConstant {
public readonly byte Value;
public ByteConstant (byte v, Location loc):
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 IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.sbyte_type) {
+ if (in_checked_context){
+ if (Value > SByte.MaxValue)
+ throw new OverflowException ();
+ }
+ 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 {
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 IsZeroInteger {
get { return Value == '\0'; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (in_checked_context){
+ if (Value > SByte.MaxValue)
+ throw new OverflowException ();
+ }
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ if (in_checked_context){
+ if (Value > Int16.MaxValue)
+ throw new OverflowException ();
+ }
+ 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 : Constant {
+ public class SByteConstant : IntegralConstant {
public readonly sbyte Value;
public SByteConstant (sbyte v, Location loc):
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 IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (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 (in_checked_context && Value < 0)
+ 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.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ if (in_checked_context && Value < 0)
+ throw new OverflowException ();
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
- public class ShortConstant : Constant {
+ public class ShortConstant : IntegralConstant {
public readonly short Value;
public ShortConstant (short v, Location loc):
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);
return Value < 0;
}
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (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 (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 (in_checked_context && Value < 0)
+ 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.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ if (in_checked_context){
+ if (Value < Char.MinValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
- public class UShortConstant : Constant {
+ public class UShortConstant : IntegralConstant {
public readonly ushort Value;
public UShortConstant (ushort v, Location loc):
{
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 ()
{
public override bool IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ if (in_checked_context){
+ if (Value > Byte.MaxValue)
+ throw new OverflowException ();
+ }
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ if (in_checked_context){
+ if (Value > SByte.MaxValue)
+ throw new OverflowException ();
+ }
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ if (in_checked_context){
+ if (Value > Int16.MaxValue)
+ throw new OverflowException ();
+ }
+ 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) {
+ if (in_checked_context){
+ if (Value > Char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
}
- public class IntConstant : Constant {
+ public class IntConstant : IntegralConstant {
public readonly int Value;
public IntConstant (int v, Location loc):
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 IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (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 (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 (in_checked_context){
+ if (Value < UInt32.MinValue)
+ 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 (in_checked_context && Value < 0)
+ 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.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ if (in_checked_context){
+ if (Value < Char.MinValue || Value > Char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ public override Constant ConvertImplicitly (Type type)
+ {
+ if (this.type == type)
+ return this;
+
+ Constant c = TryImplicitIntConversion (type);
+ if (c != null)
+ return c;
+
+ return base.ConvertImplicitly (type);
+ }
+
+ /// <summary>
+ /// Attempts to perform an implicit constant conversion of the IntConstant
+ /// into a different data type using casts (See Implicit Constant
+ /// Expression Conversions)
+ /// </summary>
+ Constant TryImplicitIntConversion (Type target_type)
+ {
+ if (target_type == TypeManager.sbyte_type) {
+ if (Value >= SByte.MinValue && Value <= SByte.MaxValue)
+ return new SByteConstant ((sbyte) Value, loc);
+ }
+ else if (target_type == TypeManager.byte_type) {
+ if (Value >= Byte.MinValue && Value <= Byte.MaxValue)
+ return new ByteConstant ((byte) Value, loc);
+ }
+ else if (target_type == TypeManager.short_type) {
+ if (Value >= Int16.MinValue && Value <= Int16.MaxValue)
+ return new ShortConstant ((short) Value, loc);
+ }
+ else if (target_type == TypeManager.ushort_type) {
+ if (Value >= UInt16.MinValue && Value <= UInt16.MaxValue)
+ return new UShortConstant ((ushort) Value, loc);
+ }
+ else if (target_type == TypeManager.uint32_type) {
+ if (Value >= 0)
+ return new UIntConstant ((uint) Value, loc);
+ }
+ else if (target_type == TypeManager.uint64_type) {
+ //
+ // we can optimize this case: a positive int32
+ // always fits on a uint64. But we need an opcode
+ // to do it.
+ //
+ if (Value >= 0)
+ return new ULongConstant ((ulong) Value, loc);
+ }
+ else if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) Value, loc);
+ else if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) Value, loc);
+
+ return null;
+ }
}
- public class UIntConstant : Constant {
+ public class UIntConstant : IntegralConstant {
public readonly uint Value;
public UIntConstant (uint v, Location loc):
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 IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ if (in_checked_context){
+ if (Value < Char.MinValue || Value > Char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ if (in_checked_context){
+ if (Value > SByte.MaxValue)
+ throw new OverflowException ();
+ }
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ if (in_checked_context){
+ if (Value > Int16.MaxValue)
+ throw new OverflowException ();
+ }
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ 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 (in_checked_context){
+ if (Value > Int32.MaxValue)
+ throw new OverflowException ();
+ }
+ 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) {
+ if (in_checked_context){
+ if (Value < Char.MinValue || Value > Char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
- public class LongConstant : Constant {
+ public class LongConstant : IntegralConstant {
public readonly long Value;
public LongConstant (long v, Location loc):
public override void Emit (EmitContext ec)
{
- ILGenerator ig = ec.ig;
-
- EmitLong (ig, Value);
+ EmitLong (ec.ig, Value);
}
static public void EmitLong (ILGenerator ig, long l)
{
- if ((l >> 32) == 0){
+ if (l >= int.MinValue && l <= int.MaxValue) {
IntLiteral.EmitInt (ig, unchecked ((int) l));
- ig.Emit (OpCodes.Conv_U8);
- } else {
- ig.Emit (OpCodes.Ldc_I8, l);
+ ig.Emit (OpCodes.Conv_I8);
+ return;
}
+ ig.Emit (OpCodes.Ldc_I8, l);
}
public override string AsString ()
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;
- }
-
public override Constant Increment ()
{
return new LongConstant (checked(Value + 1), loc);
public override bool IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (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 (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 (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 (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 (in_checked_context && Value < 0)
+ 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.double_type)
+ return new DoubleConstant ((double) Value, Location);
+ if (target_type == TypeManager.char_type) {
+ if (in_checked_context){
+ if (Value < Char.MinValue || Value > Char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
+ public override Constant ConvertImplicitly (Type type)
+ {
+ if (Value >= 0 && type == TypeManager.uint64_type) {
+ return new ULongConstant ((ulong) Value, loc);
+ }
+
+ return base.ConvertImplicitly (type);
+ }
}
- public class ULongConstant : Constant {
+ public class ULongConstant : IntegralConstant {
public readonly ulong Value;
public ULongConstant (ulong v, Location loc):
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 this;
- }
-
- public override LongConstant ConvertToLong ()
- {
- return null;
- }
-
- public override UIntConstant ConvertToUInt ()
- {
- return null;
- }
-
- public override IntConstant ConvertToInt ()
- {
- return null;
- }
-
public override Constant Increment ()
{
return new ULongConstant (checked(Value + 1), loc);
public override bool IsZeroInteger {
get { return Value == 0; }
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ if (in_checked_context && Value > Byte.MaxValue)
+ throw new OverflowException ();
+ return new ByteConstant ((byte) Value, Location);
+ }
+ if (target_type == TypeManager.sbyte_type) {
+ if (in_checked_context && Value > ((ulong) SByte.MaxValue))
+ throw new OverflowException ();
+ return new SByteConstant ((sbyte) Value, Location);
+ }
+ if (target_type == TypeManager.short_type) {
+ if (in_checked_context && Value > ((ulong) Int16.MaxValue))
+ throw new OverflowException ();
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ if (in_checked_context && Value > UInt16.MaxValue)
+ throw new OverflowException ();
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type) {
+ if (in_checked_context && Value > UInt32.MaxValue)
+ throw new OverflowException ();
+ return new IntConstant ((int) Value, Location);
+ }
+ if (target_type == TypeManager.uint32_type) {
+ if (in_checked_context && Value > UInt32.MaxValue)
+ throw new OverflowException ();
+ return new UIntConstant ((uint) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type) {
+ if (in_checked_context && Value > Int64.MaxValue)
+ throw new OverflowException ();
+ return new LongConstant ((long) 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) {
+ if (in_checked_context && Value > Char.MaxValue)
+ throw new OverflowException ();
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
public class FloatConstant : Constant {
- public readonly float Value;
+ public float Value;
public FloatConstant (float v, Location loc):
base (loc)
return Value;
}
- public override DoubleConstant ConvertToDouble ()
- {
- return new DoubleConstant (Value, loc);
- }
-
- public override FloatConstant ConvertToFloat ()
- {
- return this;
- }
-
- public override LongConstant ConvertToLong ()
- {
- return null;
- }
-
- public override UIntConstant ConvertToUInt ()
- {
- return null;
- }
-
- public override IntConstant ConvertToInt ()
- {
- return null;
- }
-
public override Constant Increment ()
{
return new FloatConstant (checked(Value + 1), loc);
return Value < 0;
}
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (in_checked_context){
+ if (Value < short.MinValue || Value > short.MaxValue)
+ throw new OverflowException ();
+ }
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ if (in_checked_context){
+ if (Value < ushort.MinValue || Value > ushort.MaxValue)
+ throw new OverflowException ();
+ }
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type) {
+ if (in_checked_context){
+ if (Value < int.MinValue || Value > int.MaxValue)
+ throw new OverflowException ();
+ }
+ return new IntConstant ((int) Value, Location);
+ }
+ if (target_type == TypeManager.uint32_type) {
+ if (in_checked_context){
+ if (Value < uint.MinValue || Value > uint.MaxValue)
+ throw new OverflowException ();
+ }
+ return new UIntConstant ((uint) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type) {
+ if (in_checked_context){
+ if (Value < long.MinValue || Value > long.MaxValue)
+ throw new OverflowException ();
+ }
+ return new LongConstant ((long) Value, Location);
+ }
+ if (target_type == TypeManager.uint64_type) {
+ if (in_checked_context){
+ if (Value < ulong.MinValue || Value > ulong.MaxValue)
+ 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 (in_checked_context){
+ if (Value < (float) char.MinValue || Value > (float) char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
public class DoubleConstant : Constant {
- public readonly double Value;
+ public double Value;
public DoubleConstant (double v, Location loc):
base (loc)
return Value;
}
- public override DoubleConstant ConvertToDouble ()
- {
- return this;
- }
-
- public override FloatConstant ConvertToFloat ()
- {
- return null;
- }
-
- public override ULongConstant ConvertToULong ()
- {
- return null;
- }
-
- public override LongConstant ConvertToLong ()
- {
- return null;
- }
-
- public override UIntConstant ConvertToUInt ()
- {
- return null;
- }
-
- public override IntConstant ConvertToInt ()
- {
- return null;
- }
-
public override Constant Increment ()
{
return new DoubleConstant (checked(Value + 1), loc);
return Value < 0;
}
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.byte_type) {
+ 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 (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 (in_checked_context){
+ if (Value < short.MinValue || Value > short.MaxValue)
+ throw new OverflowException ();
+ }
+ return new ShortConstant ((short) Value, Location);
+ }
+ if (target_type == TypeManager.ushort_type) {
+ if (in_checked_context){
+ if (Value < ushort.MinValue || Value > ushort.MaxValue)
+ throw new OverflowException ();
+ }
+ return new UShortConstant ((ushort) Value, Location);
+ }
+ if (target_type == TypeManager.int32_type) {
+ if (in_checked_context){
+ if (Value < int.MinValue || Value > int.MaxValue)
+ throw new OverflowException ();
+ }
+ return new IntConstant ((int) Value, Location);
+ }
+ if (target_type == TypeManager.uint32_type) {
+ if (in_checked_context){
+ if (Value < uint.MinValue || Value > uint.MaxValue)
+ throw new OverflowException ();
+ }
+ return new UIntConstant ((uint) Value, Location);
+ }
+ if (target_type == TypeManager.int64_type) {
+ if (in_checked_context){
+ if (Value < long.MinValue || Value > long.MaxValue)
+ throw new OverflowException ();
+ }
+ return new LongConstant ((long) Value, Location);
+ }
+ if (target_type == TypeManager.uint64_type) {
+ if (in_checked_context){
+ if (Value < ulong.MinValue || Value > ulong.MaxValue)
+ 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 (in_checked_context){
+ if (Value < (double) char.MinValue || Value > (double) char.MaxValue)
+ throw new OverflowException ();
+ }
+ return new CharConstant ((char) Value, Location);
+ }
+ if (target_type == TypeManager.decimal_type)
+ return new DecimalConstant ((decimal) Value, Location);
+
+ return null;
+ }
+
}
public class DecimalConstant : Constant {
return Value < 0;
}
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte)Value, loc);
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte)Value, loc);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short)Value, loc);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort)Value, loc);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int)Value, loc);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint)Value, loc);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long)Value, loc);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong)Value, loc);
+ if (target_type == TypeManager.char_type)
+ return new CharConstant ((char)Value, loc);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float)Value, loc);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double)Value, loc);
+
+ return null;
+ }
+
}
public class StringConstant : Constant {
return false;
}
}
+
+ public override Constant ConvertExplicitly (bool in_checked_context, Type target_type)
+ {
+ return null;
+ }
}
}
projects / mono.git / blobdiff